As a Software Engineer at Loft Orbital, you will play a crucial role in developing and maintaining software solutions that power satellite systems and space infrastructure. Your contributions will directly impact the efficiency and effectiveness of space missions, enhancing how data is collected, processed, and relayed back to Earth. This role is not just about writing code; it requires a deep understanding of complex systems, innovative thinking, and the ability to collaborate with cross-functional teams to create reliable and scalable solutions. At Loft Orbital, you will be part of a dynamic team that tackles unique challenges in the aerospace industry. This position offers the opportunity to work on cutting-edge technologies and contribute to projects that have significant implications for space exploration, satellite communications, and data management. Whether you're developing software for ground control operations or working on algorithms for satellite navigation, the work you do here will help shape the future of space technology.
Initial Screening
reportedCandidates undergo an initial screening with HR to assess basic qualifications.
What to demonstrate
- Candidates undergo an initial screening with HR to assess basic qualifications
- Depth in Take-home Coding Assignments
How to prepare
- Be able to walk your CV end to end in two minutes, and say why this company specifically.
- Have your salary expectations, notice period and location constraints ready, and ask for the rest of the loop in writing.
Technical Interviews
reportedCandidates participate in technical interviews that may include coding challenges and system design discussions.
What to demonstrate
- Candidates participate in technical interviews that may include coding challenges and system design discussions
- Depth in Take-home Coding Assignments
How to prepare
- Answer aloud and timed: Describe a challenging technical problem you solved in a previous project.
- Answer aloud and timed: What tools or frameworks have you used for version control and CI/CD?
Team Engagement
reportedCandidates engage with various team members, including engineers and leadership, to evaluate compatibility.
What to demonstrate
- Candidates engage with various team members
- Including engineers and leadership, to evaluate compatibility
How to prepare
- Answer aloud and timed: Can you discuss your experience with cloud platforms or microservices architecture?
- Answer aloud and timed: Write a function to determine if a string is a palindrome.
Final Discussions
reportedFinal discussions take place to assess overall fit and collaboration potential.
What to demonstrate
- Final discussions take place to assess overall fit and collaboration potential
- Depth in Take-home Coding Assignments
How to prepare
- Answer aloud and timed: Implement a simple algorithm for sorting an array.
- Answer aloud and timed: How would you optimize an existing piece of code?
PracHub editorial advice for the preparation topics above.
Understand the Mission
Familiarize yourself with Loft Orbital's mission and how your work as a Software Engineer will contribute to space technology advancements.
Showcase Your Projects
Be prepared to discuss your past projects in detail, highlighting challenges faced, your contributions, and outcomes achieved.
Ask Insightful Questions
Prepare thoughtful questions to ask your interviewers, demonstrating your interest in the role and the company.
Practice Coding Challenges
Use platforms like LeetCode or HackerRank to refine your coding skills and prepare for live coding exercises.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Explain the difference between synchronous and asynchronous programming.
Explain the difference between synchronous and asynchronous programming.
Approach
- Say what the runtime actually does before reasoning about the code.
- Name what is shared across threads and what owns each piece of state.
- Identify the window where an invariant is briefly untrue.
- Distinguish a value from a reference to it, and say which one you handed out.
Follow-up
- What happens if two callers reach this at the same time?
- Where could this allocate more than you expect?
Write a function to determine if a string is a palindrome.
Write a function to determine if a string is a palindrome.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Implement a simple algorithm for sorting an array.
Implement a simple algorithm for sorting an array.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
How would you optimize an existing piece of code?
How would you optimize an existing piece of code?
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Explain the use of data structures such as queues and stacks in your recent projects.
Explain the use of data structures such as queues and stacks in your recent projects.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Solve this coding challenge within a specified time limit.
Solve this coding challenge within a specified time limit.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Hold a per-tenant active cap against concurrent creates
A tenant on the standard plan may hold at most 50 resources with status='active'. The create handler runs SELECT count(*) FROM resource WHERE tenant_id = $1 AND status = 'active', compares to 50, then inserts. Two creates arrive 3 ms apart on different instances and the tenant lands at 51. Name the anomaly, say whether PostgreSQL 16 READ COMMITTED or REPEATABLE READ prevents it and why, then give an implementation that holds the cap at READ COMMITTED with the exact statements. Finally, say what changes when the cap is 'at most one running export per tenant' on job_run.
Approach
- Name it: write skew. The two transactions read an overlapping set and write disjoint rows, so there is no row-level conflict for the engine to detect and each commit is individually legal.
- Rule out the levels precisely. READ COMMITTED takes a fresh snapshot per statement and takes no lock on the counted rows, so both see 49. PostgreSQL's REPEATABLE READ is snapshot isolation: it removes non-repeatable reads and phantoms within the snapshot but still admits write skew, because the anomaly is not a re-read of a changed row, it is a read of a set that a concurrent transaction invalidates. Only SERIALIZABLE closes it, by tracking the read dependency and aborting one transaction with SQLSTATE 40001 — a guarantee that exists only if the application re-runs the whole transaction from the read.
- Convert the set predicate into a single-row conflict: keep tenant.active_resource_count and run UPDATE tenant SET active_resource_count = active_resource_count + 1 WHERE tenant_id = $1 AND active_resource_count < 50 in the same transaction as the INSERT. Zero affected rows is the cap, returned as 409. The row lock serialises the decision at any isolation level, and contention is bounded to one tenant's row — which is also the fair-scheduling unit, unlike a global counter that would convoy every tenant behind one row.
- State the cost you just took on: a counter is a second source of truth that can drift, so every path that changes status must adjust it inside the same transaction, and a periodic reconciliation has to exist, with resource_revision as the authority for what the count should have been.
Follow-up
- A resource moves from archived back to active. Which statements change, and what breaks if the counter update and the status change land in different transactions?
- The cap becomes plan-dependent and a plan can change mid-month. Where does the number 50 live, and who reads it?
Denormalise tenant onto revisions and backfill it live
resource_revision (revision_id, resource_id, version, actor_user_id, change_kind, patch, request_id, created_at) has 400M rows and no tenant column; tenant_id lives only on resource. Two reads need it: a tenant-scoped audit feed ordered by created_at DESC, and an offboarding purge. Both join back to resource today. Justify adding tenant_id to resource_revision against those two reads, name the anomaly the copy introduces and the constraint that prevents it, then give the ordered migration for a live table taking 1.2k writes/second — the lock each step takes, how the backfill is batched, and where each step stops being reversible. PostgreSQL 16.
Approach
- Justify from the access path rather than from taste. Without the column, the audit feed either scans resource_revision by created_at and discards other tenants' rows, or resolves the tenant's resource_ids first and probes with them — both proportional to the tenant's whole history rather than to one page. With (tenant_id, created_at DESC, revision_id DESC) it is a seek that stops at 50 rows, and the purge becomes a ranged delete instead of a join.
- Name the cost exactly: a second copy of a fact can disagree with the first. Make the disagreement unwritable rather than documented — add UNIQUE (resource_id, tenant_id) on resource so it can serve as a foreign-key target, then FOREIGN KEY (resource_id, tenant_id) REFERENCES resource (resource_id, tenant_id) on the revision table. A revision can then only ever carry its parent's tenant.
- Step one, expand: ALTER TABLE resource_revision ADD COLUMN tenant_id BIGINT NULL, with no default, so it is a catalogue change and no rewrite. It still needs ACCESS EXCLUSIVE for an instant, and that instant queues behind the longest open transaction on the table while every later query queues behind it — set lock_timeout to 2s and retry rather than wait.
- Step two, dual-write: deploy the writer that populates tenant_id on every new revision while reads still use the join. Reversible by redeploying the previous build, because nothing reads the column yet.
Follow-up
- The backfill is half finished and a rollback is required. What state is the table in, and what does the previous build do with a half-populated column?
- How do you verify the backfill actually finished, given rows are still being inserted while it runs?
How do you ensure your code is maintainable and scalable?
How do you ensure your code is maintainable and scalable?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
Describe a challenging technical problem you solved in a previous project.
Describe a challenging technical problem you solved in a previous project.
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
What tools or frameworks have you used for version control and CI/CD?
What tools or frameworks have you used for version control and CI/CD?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
Can you discuss your experience with cloud platforms or microservices architecture?
Can you discuss your experience with cloud platforms or microservices architecture?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
Design a system for managing satellite data. What components would you include?
Design a system for managing satellite data. What components would you include?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
How would you approach ensuring the reliability of a software system in space?
How would you approach ensuring the reliability of a software system in space?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
Discuss the trade-offs between monolithic and microservices architectures for a new application.
Discuss the trade-offs between monolithic and microservices architectures for a new application.
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
How do you ensure security in your software solutions?
How do you ensure security in your software solutions?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
What factors would you consider when planning for scaling a system?
What factors would you consider when planning for scaling a system?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
Given a scenario where a satellite has lost communication, what steps would you take to diagnose the issue?
Given a scenario where a satellite has lost communication, what steps would you take to diagnose the issue?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
If tasked with reducing latency in data transmission, how would you proceed?
If tasked with reducing latency in data transmission, how would you proceed?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
Discuss how you would approach a project with incomplete requirements.
Discuss how you would approach a project with incomplete requirements.
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
How would you prioritize tasks when multiple issues arise simultaneously?
How would you prioritize tasks when multiple issues arise simultaneously?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
If a software update introduces bugs, what process would you follow to address them?
If a software update introduces bugs, what process would you follow to address them?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
p99 jumped on one listing filter while p50 stayed flat
After a release that added an owner_user_id filter to the resource listing, p99 rose from 90 ms to 1.9 s while p50 stayed at 40 ms. Traffic and row counts are unchanged. resource carries the index (tenant_id, status, updated_at DESC, resource_id DESC). The new query filters tenant_id and owner_user_id, orders by updated_at DESC, resource_id DESC, and takes 20 rows. On PostgreSQL, explain the shape of the regression, prove it from a query plan, and give the index you would add.
Approach
- Start from the shape. A flat p50 with a moved p99 means a subset of requests changed cost, not all of them, so the first job is naming the subset. Bucket the endpoint's latency by the tenant's row count; the natural hypothesis is that large tenants are a small share of requests and all of the tail.
- Get the plan for the new query on a large tenant with EXPLAIN (ANALYZE, BUFFERS). Expect an index scan over the tenant's range, a filter discarding most of it, then a Sort feeding the Limit, possibly reporting Sort Method: external merge Disk. Read actual rows on the scan node, not estimated.
- Explain why the existing index cannot serve it. A composite B-tree is seekable only as a left prefix, and with no equality predicate on status the scan cannot treat updated_at as an ordering, because rows in the tenant's range are ordered by status first. Everything matching must be read and sorted before LIMIT 20 can apply, so a tenant with 400,000 rows pays 400,000 rows to return 20.
- Add (tenant_id, owner_user_id, updated_at DESC, resource_id DESC). Equality on the first two columns leaves the index ordered by updated_at within that pair, so the plan becomes an index scan that stops after 20 rows with no Sort node. PostgreSQL can scan a B-tree backwards, so the DESC markers matter only if the two sort columns ever disagree in direction; keeping them explicit documents the order the keyset cursor depends on.
Follow-up
- The endpoint paginates with OFFSET. What does page 500 cost with your index, and what does the keyset version cost?
- How would you have caught this before release, given that a 10,000-row seed database produces the same plan shape at an unnoticeable cost?
Built from the rounds and topics Loft Orbital candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Loft Orbital loop
- Write out the reported sequence: Initial Screening, Technical Interviews, Team Engagement, Final Discussions.
- For each round, write one sentence on what it is judging, from the description above, and mark the one you are least ready for.
Deliverable: A one-page map of the 4 reported rounds, with the weakest marked.
02Work Take-home Coding Assignments
- Spend the session on Take-home Coding Assignments, which Loft Orbital candidates report being tested on.
- Write one worked example in Take-home Coding Assignments and time yourself on it.
Deliverable: One timed worked example in Take-home Coding Assignments.
03Work Documentation (engineering documentation)
- Spend the session on Documentation (engineering documentation), which Loft Orbital candidates report being tested on.
- Write one worked example in Documentation (engineering documentation) and time yourself on it.
Deliverable: One timed worked example in Documentation (engineering documentation).
04Work Python
- Spend the session on Python, which Loft Orbital candidates report being tested on.
- Write one worked example in Python and time yourself on it.
Deliverable: One timed worked example in Python.
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: Explain the difference between synchronous and asynchronous programming.
- Answer aloud, timed: How do you ensure your code is maintainable and scalable?
Deliverable: Spoken answers to 2 reported Technical / Domain Questions question(s), under time.
06Answer out loud: Coding / Algorithms
- Answer aloud, timed: Write a function to determine if a string is a palindrome.
- Answer aloud, timed: Implement a simple algorithm for sorting an array.
Deliverable: Spoken answers to 2 reported Coding / Algorithms question(s), under time.
07Answer out loud: Behavioral / Leadership
- Answer aloud, timed: Describe a time when you faced a conflict with a team member. How did you resolve it?
- Answer aloud, timed: What motivates you to succeed in a project?
Deliverable: Spoken answers to 2 reported Behavioral / Leadership question(s), under time.
Expand any day for tasks and deliverables. Your progress is saved on this device.
Behavioural rounds judge the decision you made and what it cost.
Describe a time when you faced a conflict with a team member. How did you resolve it?
Describe a time when you faced a conflict with a team member. How did you resolve it?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
What motivates you to succeed in a project?
What motivates you to succeed in a project?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
How do you handle tight deadlines and multiple priorities?
How do you handle tight deadlines and multiple priorities?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
Can you share an instance where you had to adapt to significant changes during a project?
Can you share an instance where you had to adapt to significant changes during a project?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
How do you approach mentoring or helping junior team members?
How do you approach mentoring or helping junior team members?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
- 01
Describe a time when you faced a conflict with a team member. How did you resolve it?
- 02
What motivates you to succeed in a project?
- 03
How do you handle tight deadlines and multiple priorities?
- 04
Can you share an instance where you had to adapt to significant changes during a project?
What is the interview difficulty level for a Software Engineer at Loft Orbital?
The interview process is generally considered challenging, reflecting the company’s high standards for technical proficiency and cultural fit. Candidates should expect a rigorous evaluation of their technical skills and problem-solving abilities.
Loft Orbital Software Engineer candidate reports ↗How much preparation time is typical before interviews?
Most candidates spend several weeks preparing for the interview, focusing on technical skills, coding challenges, and understanding the company's mission and values.
Loft Orbital Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates typically demonstrate a strong technical foundation, effective communication skills, and a collaborative mindset. They are also able to articulate their experiences and problem-solving approaches clearly.
Loft Orbital Software Engineer candidate reports ↗What is the company culture like at Loft Orbital?
The culture at Loft Orbital emphasizes innovation, teamwork, and a passion for space technology. Employees are encouraged to collaborate across teams and contribute to projects that align with the company's mission.
Loft Orbital Software Engineer candidate reports ↗What is the typical timeline from initial screen to offer?
The interview process can take anywhere from a few weeks to a couple of months, depending on the number of candidates and the complexity of the roles being filled.
Loft Orbital Software Engineer candidate reports ↗Are there remote work options available?
Loft Orbital offers flexibility in work arrangements, but candidates should inquire about specific policies during the interview process.
Loft Orbital Software Engineer candidate reports ↗What topics does Loft Orbital test in interviews?
Loft Orbital interviews most often cover Problem Solving, Technical Program Management, Python, Cross-functional Coordination, and Stakeholder Management. The exact emphasis depends on the specific role you apply for.
Loft Orbital Software Engineer candidate reports ↗Sources & methodology 3 sources ↗
No official company page is cited. Rounds and questions come from candidate reports and PracHub editorial material; each source shows the date it was read.
- 01Loft Orbital Software Engineer candidate reports ↗
Company-reported rounds, questions and FAQ.
Candidate reports · Accessed 2026-09-22 - 02PracHub Software Engineer practice ↗
PracHub practice material, not company-reported.
PracHub page · Accessed 2026-09-22 - 03PracHub preparation framework ↗
PracHub preparation guidance.
PracHub page · Accessed 2026-09-22
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