Oscar Health's Interview Process (2026)

Blog / Oscar Health's Interview Process (2026)

The Oscar Health software engineer interview typically unfolds over about a month and is generally structured around practical coding challenges, healthcare-focused system design, and a product thinking round you won't find at most other companies.

Recruiter Screen: A 30-minute conversation covering your background, technical experience, and interest in healthcare technology. Expect questions about why you want to work in healthcare specifically.
Technical Screen: A 60-minute live coding session in CoderPad, typically focused on practical, real-world logic problems rather than pure algorithmic puzzles. Recent candidates report problems like a Morse code converter with a follow-up asking you to reverse-engineer all possible original strings.
Coding Rounds I & II: Two separate coding sessions during the virtual onsite that cover data structures, algorithms, and code quality. Interviewers pay close attention to how you explain your reasoning as you code.
System Design: A 60-minute architecture round with a healthcare-specific scenario. A recent example asked candidates to design a telehealth queuing app where physicians only see patients from states where they are licensed.
Product Thinking / Case Study: Oscar's most distinctive round. You collaborate with the interviewer to solve a product-centric engineering problem, such as designing the backend process for mailing physical insurance cards to members, including handling address changes and delivery failures.
Behavioral / Cultural Fit: A structured conversation around leadership, conflict resolution, and mission alignment. Interviewers are specifically looking for engineers who care about fixing problems in the US healthcare system.

To prepare effectively for Oscar's pipeline, focus your study plan on these key areas:

Data Structures & Algorithms (DSA): Practical coding challenges with a focus on string manipulation, graph traversal, and classic data structures like LRU Cache.
System Design: Healthcare-specific architecture problems covering scalability, HIPAA constraints, and state-based licensing logic.
Product Thinking / Case Study: A collaborative round where you think through backend engineering problems from both a product and engineering perspective.
Behavioral: Mission-driven conversations focused on your motivations, leadership, and alignment with improving US healthcare.

1. Data Structures & Algorithms (DSA)Oscar's coding rounds lean toward practical logic problems over classic algorithmic puzzles, but core data structures still come up regularly. Candidates report questions on LRU Cache, doubly linked lists, and hash maps, so make sure these fundamentals are solid before your screen. The Design LRU Cache problem is a particularly common one to have ready.String manipulation is a recurring theme across both the technical screen and the onsite coding rounds. The Morse code problem is a well-known example: you implement the conversion in one direction, then handle the harder reverse case where one Morse sequence can map to multiple words. Getting comfortable with problems like Unique Morse Code Words and Interleaving String will put you in a strong position.Graph traversal also comes up, particularly BFS and DFS in the context of provider routing or scheduling scenarios. Binary addition without built-in conversion libraries is another reported challenge, so practice Add Binary Strings from first principles. For a broad review of the most commonly tested patterns, work through our top 100 DSA questions to cover your bases efficiently.Regex is a less obvious but real stumbling block at Oscar. Candidates report a timed challenge where you are given strings and their matches and must reverse-engineer the pattern that produced them. Spend some time writing complex regex patterns from scratch using our graphs and string manipulation practice so that kind of unstructured problem feels familiar.

2. System DesignOscar's system design round is consistently grounded in healthcare scenarios, which means you need to think beyond standard web architecture. A recent prompt asked candidates to design a telehealth physician queuing application that routes patients only to doctors licensed in their state. This requires thinking about licensing data models, real-time queuing, and geographic filtering at scale.HIPAA compliance and data integrity come up naturally in these conversations, so you should be comfortable discussing how your design handles sensitive health data. Review High-Level Design concepts to build a strong foundation for talking through trade-offs around consistency, availability, and data partitioning. Practicing on our System Design Whiteboard is a good way to rehearse drawing out these architectures under time pressure.Product empathy matters a lot in this round, not just technical correctness. When you propose caching a data layer, for example, tie it back to the user experience: something like explaining that caching deductible data prevents members from seeing a loading spinner when they check their benefits. Interviewers respond well when you connect architecture decisions to real user outcomes.

3. Product Thinking / Case StudyThis round is Oscar's most distinctive and often the one candidates feel least prepared for. You are given an open-ended product-engineering problem and expected to collaborate with the interviewer to work through it systematically. A recent example involved designing the backend process for mailing physical insurance cards to new members, including how to handle address changes, failed deliveries, and third-party vendor integrations.Think of this as a product manager conversation with an engineering lens. Start by clarifying requirements and edge cases before proposing any solution. The interviewer wants to see how you identify failure modes and make trade-offs, not just whether you arrive at the right answer.Practical prep here means getting comfortable with real-world backend logic problems that involve messy state and external dependencies. Practicing problems like the Physician Consultation Queuing Application will help you think through this kind of scenario in a structured way.

4. BehavioralOscar interviewers are specifically looking for engineers who are motivated by the mission of improving US healthcare, not just the technical work. Expect a direct question about why you want to work in healthcare, and prepare a genuine, specific answer about what frustrates you about the current system and what you want to change.Beyond mission alignment, the behavioral round covers leadership, conflict resolution, and how you handle ambiguity. Structure your answers using the STAR principle to keep your responses focused and concrete. For a full framework to prepare these stories, the Behavioral Interview Course is a practical resource to work through before your onsite.

ConclusionOscar's interview is genuinely different from a standard Big Tech pipeline, so general prep alone won't cut it. Focus on practical coding, healthcare-aware system design, and building a clear narrative around why you want to work in this space. Follow the Oscar Health Interview Roadmap for a structured, step-by-step plan covering every round in the process.

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