Interview preparation

Poolside interview process & preparation

Poolside currently has 16+ live openings on OnJob.io, concentrated in Software Engineer, Data Analyst and Data Engineer roles. There are no leaked or company-specific questions here — instead, prepare with the general, role-based interview rounds and most-asked questions for those role types below, then practise them free with OnJob's AI mock interview.

Practise with AI mock interview See live Poolside jobs

Honest note: OnJob.io does not publish leaked or company-confidential interview questions. The guides below are general, role-based preparation — the standard rounds and commonly-asked questions for the role types Poolside is currently hiring for. Use them to prepare; your real Poolside interview may differ.

What to expect when interviewing for Software Engineer, Data Analyst and Data Engineer roles at companies like Poolside

Poolside is currently advertising these role types on OnJob.io. Each guide is the general interview structure and most-asked questions for that role — prepare with it, then rehearse free with the AI mock interview.

General Software Engineer interview prep

11 live roles at Poolside

Coding, data structures, algorithms and system design — the core software engineering loop used by product companies and startups across India.

Typical Software Engineer interview rounds

1 Online assessment. Timed coding problems on arrays, strings and hashing on HackerRank or HackerEarth.
2 DSA / problem solving. 1–2 live coding rounds on data structures, algorithms and complexity analysis.
3 System design. Designing a scalable service (mid/senior); low-level design for early-career.
4 Hiring manager / culture fit. Past projects, ownership, behavioural questions and team fit.

Commonly-asked Software Engineer questions

Reverse a linked list, both iteratively and recursively.
Find the two numbers in an array that add up to a target sum.
Detect whether a linked list has a cycle.
What is the difference between a process and a thread?
Explain time and space complexity (Big O) with examples.
How does a hash map work internally, and what happens on collisions?
Find the longest substring without repeating characters.
What is the difference between an array and a linked list?

Full Software Engineer prep AI mock interview

General Data Analyst interview prep

1 live role at Poolside

SQL, Excel, statistics and storytelling with data — the analyst interview for product, BI and analytics teams across India.

Typical Data Analyst interview rounds

1 SQL round. Joins, aggregations, window functions and query writing.
2 Excel / spreadsheet round. Lookups, pivot tables and formulas.
3 Case / analytics round. Business case: define metrics, analyse and recommend.
4 Tool & viz round. Power BI / Tableau dashboards and stakeholder communication.

Commonly-asked Data Analyst questions

What is the difference between INNER JOIN, LEFT JOIN and FULL OUTER JOIN?
Write a SQL query to find the second-highest salary in a table.
What is the difference between WHERE and HAVING?
Explain window functions like ROW_NUMBER(), RANK() and DENSE_RANK().
What is the difference between mean, median and mode, and when is each misleading?
How do you handle missing or null values in a dataset?
Explain the difference between a primary key and a foreign key.
What is normalisation, and why does it matter for analysis?

Full Data Analyst prep AI mock interview

General Data Engineer interview prep

1 live role at Poolside

Data pipelines, SQL, big-data tools and warehousing — the data-engineering interview for analytics, fintech and product teams building data platforms.

Typical Data Engineer interview rounds

1 SQL & data modelling. Complex queries, window functions, star vs snowflake schema design.
2 Big data & pipelines. Spark, Hadoop, ETL/ELT design and batch vs streaming.
3 Coding round. Python/Scala data manipulation and DSA basics.
4 System design. Design an end-to-end data pipeline or warehouse.

Commonly-asked Data Engineer questions

What is the difference between ETL and ELT, and when do you use each?
Explain the difference between a data warehouse, a data lake and a data mart.
What is the difference between a star schema and a snowflake schema?
How does Apache Spark work, and what is an RDD vs a DataFrame?
Explain the difference between batch processing and stream processing.
What is partitioning and bucketing in Hive, and why do they matter?
How do you handle slowly changing dimensions (SCD types 1, 2 and 3)?
What is data normalisation, and when would you denormalise for analytics?

Full Data Engineer prep AI mock interview

General Full Stack Developer interview prep

1 live role at Poolside

End-to-end web engineering — frontend, backend, databases and deployment — for startups and product teams that want one engineer to own a feature.

Typical Full Stack Developer interview rounds

1 Frontend round. JavaScript, React and UI fundamentals.
2 Backend round. API design, databases and server-side logic.
3 Full-stack machine coding. Build a small end-to-end feature (form → API → DB).
4 System design & deployment. Architecture, hosting, CI/CD and trade-offs.

Commonly-asked Full Stack Developer questions

Walk me through what happens from a user clicking a button to data being saved in the database.
How do you handle authentication and sessions in a full-stack app (JWT vs cookies)?
Explain CORS and how you fix a CORS error.
How do you structure a REST API for a CRUD application?
What is the difference between client-side and server-side rendering?
How do you prevent SQL injection and XSS in your app?
Explain state management on the frontend — when do you reach for a library?
How would you optimise a slow-loading web page end to end?

Full Full Stack Developer prep AI mock interview

Rehearse your Poolside interview, free

Run a realistic AI mock interview for your target role and get instant feedback on your answers — or take a timed mock test to check your fundamentals before the real thing.

AI mock interview Free mock test Poolside jobs

Interview prep at other companies

Poolside interview — FAQs

How do I prepare for a Poolside interview?

Prepare by role: identify the role you're applying for, then practise the standard interview rounds and most-asked questions for that role type. Poolside is currently hiring for Software Engineer, Data Analyst and Data Engineer roles, so focus there. Use OnJob's free AI mock interview to rehearse with instant feedback, and review the role-specific question lists below. These are general role-based questions, not leaked Poolside questions.

What questions are asked in a Poolside interview?

We don't publish leaked or company-specific Poolside questions. What we do provide is the general, frequently-asked interview questions for the role types Poolside hires for — such as Software Engineer, Data Analyst and Data Engineer roles. For example, Software Engineer interviews commonly cover: Reverse a linked list, both iteratively and recursively. Find the two numbers in an array that add up to a target sum. Detect whether a linked list has a cycle. Prepare with these general questions and OnJob's free AI mock interview.

How many rounds does a Poolside interview have?

It depends on the role. A typical Software Engineer interview runs across 4 rounds — Online assessment, DSA / problem solving, System design, Hiring manager / culture fit. Round counts vary by company and seniority; treat this as the general structure to prepare for, not a guarantee of Poolside's exact process.

Is Poolside hiring right now?

Yes — Poolside has 16+ live openings on OnJob.io, refreshed daily, mostly for Software Engineer, Data Analyst and Data Engineer roles. Browse the live Poolside jobs and see your AI match score on each before you apply.

Free forever — no credit card

Get matched to Poolside roles you're ready for

Create a free profile to see your AI match score on every live Poolside opening, practise the interview, and apply in one click.

Create my free profile Browse Poolside jobs