As a Software Engineer at IRIS Software Group, you play a pivotal role in developing and maintaining innovative software solutions that empower businesses to enhance their operational efficiency. This position is critical not only for the technical prowess required but also for the strategic influence it wields in shaping the company’s product offerings. You will work on diverse and complex projects, contributing to products that span various domains such as finance, healthcare, and education, ensuring they meet high standards of performance and reliability. The impact of your work is felt across the organization and by end users, as you will create solutions that streamline processes and improve user experiences. The role is intellectually stimulating and rewarding, with opportunities to collaborate with cross-functional teams and leverage cutting-edge technologies. You can expect to be at the forefront of software development, utilizing modern methodologies and best practices to deliver exceptional results.
Initial Screening Call
reportedA call with a recruiter to assess your background and fit for the role.
What to demonstrate
- A call with a recruiter to assess your background and fit for the role
- Depth in JavaScript
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 Assessments
reportedMultiple rounds of technical assessments to evaluate your technical skills.
What to demonstrate
- Multiple rounds of technical assessments to evaluate your technical skills
- Depth in JavaScript
How to prepare
- Answer aloud and timed: How does the Spring framework handle transactions?
- Answer aloud and timed: What are the differences between REST and SOAP?
Behavioral Interviews
reportedInterviews focusing on your experiences and cultural alignment with the company.
What to demonstrate
- Interviews focusing on your experiences and cultural alignment with the company
- Depth in JavaScript
How to prepare
- Prepare three examples from your own work, each with a decision you made and an outcome you can quantify.
- Re-read the description of the behavioral interviews above and write down what you would ask to confirm before it.
Final Round
reportedA final interview round with senior leadership to assess overall fit.
What to demonstrate
- A final interview round with senior leadership to assess overall fit
- Depth in JavaScript
How to prepare
- Answer aloud and timed: Implement a binary search algorithm.
- Answer aloud and timed: How would you reverse a linked list?
PracHub editorial advice for the preparation topics above.
Practice coding regularly
Regular coding practice can sharpen your skills and boost your confidence during live coding sessions.
Be prepared for behavioral questions
Reflect on your past experiences and be ready to discuss how you've handled challenges in the workplace.
Understand the company culture
Research IRIS Software Group’s values and work environment to demonstrate your alignment during interviews.
Ask insightful questions
Prepare questions that show your interest in the role and the company, as this reflects positively on your candidacy.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Write a function to remove duplicates from an array.
Write a function to remove duplicates from 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?
Implement a binary search algorithm.
Implement a binary search algorithm.
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 reverse a linked list?
How would you reverse a linked list?
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 a problem using dynamic programming.
Solve a problem using dynamic programming.
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?
Discuss the trade-offs of different database types (SQL vs. NoSQL).
Discuss the trade-offs of different database types (SQL vs. NoSQL).
Approach
- Name the grain you start from and join outward from it.
- Check whether any join is one-to-many before aggregating, or the sums inflate.
- Say which index the query would use, and what makes it unusable.
- Handle the rows that do not match: that is usually the actual question.
Follow-up
- How does the query change if that join becomes one-to-many?
- What happens to this when the table is ten times larger?
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?
What are the core principles of object-oriented programming?
What are the core principles of object-oriented programming?
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?
Explain the concept of dependency injection in Spring.
Explain the concept of dependency injection in Spring.
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 does the Spring framework handle transactions?
How does the Spring framework handle transactions?
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 are the differences between REST and SOAP?
What are the differences between REST and SOAP?
Approach
- Say who the caller is and what they do when the call fails halfway.
- Define the identity of a request so a retry cannot double-apply it.
- Separate accepted, pending, failed and confirmed; they are different facts.
- Design the error taxonomy before the success shape; callers branch on it.
Follow-up
- What happens if the caller retries after a timeout?
- How does a client discover it is on an old version of this contract?
Describe the concept of microservices architecture.
Describe the concept of 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?
How would you design a URL shortening service?
How would you design a URL shortening service?
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?
Explain how you would approach designing a real-time chat application.
Explain how you would approach designing a real-time chat 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?
Describe your process for ensuring system security in your designs.
Describe your process for ensuring system security in your designs.
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 considerations do you take into account for performance optimization?
What considerations do you take into account for performance optimization?
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 steps would you take to improve the code quality of an existing codebase?
What steps would you take to improve the code quality of an existing codebase?
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 gather requirements for a new software feature.
Discuss how you would gather requirements for a new software feature.
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?
Explain how you would assess the impact of a significant change in a software project.
Explain how you would assess the impact of a significant change in a software 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?
Explain your approach to debugging a piece of code.
Explain your approach to debugging a piece of code.
Approach
- Establish what changed and when, before forming any theory.
- Pick a bisection that eliminates candidates whichever way it turns out.
- Check the instrumentation before believing the symptom.
- Separate the trigger from the cause; the deploy is rarely the bug.
Follow-up
- What would you look at first, and what would it rule out?
- How would you tell a cause from a coincidence here?
How would you approach troubleshooting a performance issue in a web application?
How would you approach troubleshooting a performance issue in a web application?
Approach
- Establish what changed and when, before forming any theory.
- Pick a bisection that eliminates candidates whichever way it turns out.
- Check the instrumentation before believing the symptom.
- Separate the trigger from the cause; the deploy is rarely the bug.
Follow-up
- What would you look at first, and what would it rule out?
- How would you tell a cause from a coincidence here?
Built from the rounds and topics IRIS Software Group candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the IRIS Software Group loop
- Write out the reported sequence: Initial Screening Call, Technical Assessments, Behavioral Interviews, Final Round.
- 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 JavaScript
- Spend the session on JavaScript, which IRIS Software Group candidates report being tested on.
- Write one worked example in JavaScript and time yourself on it.
Deliverable: One timed worked example in JavaScript.
03Work React
- Spend the session on React, which IRIS Software Group candidates report being tested on.
- Write one worked example in React and time yourself on it.
Deliverable: One timed worked example in React.
04Work Jest (Unit Testing)
- Spend the session on Jest (Unit Testing), which IRIS Software Group candidates report being tested on.
- Write one worked example in Jest (Unit Testing) and time yourself on it.
Deliverable: One timed worked example in Jest (Unit Testing).
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: What are the core principles of object-oriented programming?
- Answer aloud, timed: Explain the concept of dependency injection in Spring.
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 remove duplicates from an array.
- Answer aloud, timed: Implement a binary search algorithm.
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 in a team. How did you resolve it?
- Answer aloud, timed: Can you give an example of how you handled a tight deadline?
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 in a team. How did you resolve it?
Describe a time when you faced a conflict in a team. 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?
Can you give an example of how you handled a tight deadline?
Can you give an example of how you handled a tight deadline?
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 as a software engineer?
What motivates you as a software engineer?
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 prioritize tasks when managing multiple projects?
How do you prioritize tasks when managing multiple projects?
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?
Tell me about a time when you took a leadership role in a project.
Tell me about a time when you took a leadership role 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?
- 01
Describe a time when you faced a conflict in a team. How did you resolve it?
- 02
Can you give an example of how you handled a tight deadline?
- 03
What motivates you as a software engineer?
- 04
How do you prioritize tasks when managing multiple projects?
What is the typical interview difficulty level for this role?
The interview difficulty is generally average to difficult, with a balanced focus on technical and behavioral aspects. Candidates should prepare for a mix of coding challenges and situational questions.
IRIS Software Group Software Engineer candidate reports ↗How long does the interview process usually take?
The interview process can take anywhere from a couple of weeks to a month, depending on scheduling and the number of interview rounds.
IRIS Software Group Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates often demonstrate a strong technical foundation, effective communication skills, and a genuine alignment with the company’s values and culture.
IRIS Software Group Software Engineer candidate reports ↗Is remote work an option for this role?
Yes, IRIS Software Group offers remote work opportunities, depending on the specific team and project requirements. Be sure to clarify expectations during the interview.
IRIS Software Group Software Engineer candidate reports ↗What topics does IRIS Software Group test in interviews?
IRIS Software Group interviews most often cover Panel Interviewing, Problem Solving, Stakeholder Communication, Competency-Based Interviewing, and Communication Skills. The exact emphasis depends on the specific role you apply for.
IRIS Software Group 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.
- 01IRIS Software Group 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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