SDE-2 : Backend / Fullstack Engineer

About the role

• FOXO’s backend is where some of the most consequential work happens: biomarker results, personalized protocols, lab report parsing, and the business logic that connects health data to recommendations.
• This is not a ticket-closing role. You’ll work under a Lead Backend Engineer, but the product surfaces you own are yours to design, build, improve, and support in production.
• You’ll own the member-facing customer journey across backend systems, and if your profile is fullstack, you’ll also own selected web and internal tooling surfaces.
• This is a full-time role for an engineer who wants meaningful ownership in a domain where correctness matters.

What you will build

• Member onboarding and profile APIs — the data layer for health goals, conditions, supplement history, and wearable devices.
• Lab report ingestion — receive parsed biomarker data from the extraction pipeline and normalize it into a member’s longitudinal health record.
• Protocol delivery APIs — build the endpoints that serve personalized supplement and lifestyle recommendations with strong correctness and low latency.
• Member progress and history — power longitudinal biomarker views, trend calculations, reference range evaluation, and alert thresholds used by clinicians and nutritionists.
• Notification and communication systems — scheduled reminders, protocol check-ins, and biomarker follow-ups that need reliable delivery at scale.
• If you’re fullstack, you’ll also build member-facing Next.js surfaces and internal ops tooling used by clinical and operations teams.

Tech stack

• Python, FastAPI, Supabase (PostgreSQL), GCP Cloud Run, pgvector, GitHub Actions, and Claude API (Anthropic).
• For fullstack work: Next.js, React, TypeScript, and Tailwind CSS.
• We use Supabase Row Level Security heavily, so you should be comfortable reasoning about access control and writing policies correctly around sensitive member data.

What we’re looking for

• 3–5 years of backend engineering experience building APIs that real users depend on, including handling production issues when things break.
• Strong Python fundamentals and a habit of writing clean, testable code.
• FastAPI or similar async framework experience with a real understanding of async behavior at runtime.
• Strong PostgreSQL skills across schema design, indexing, query optimization, and debugging slow queries.
• REST API design experience including versioning, change management, and designing endpoints other engineers consume.
• Frontend literacy is a plus — especially React or Next.js familiarity that helps in a small, fast-moving team.
• For fullstack candidates: production-level comfort across Python/FastAPI and Next.js/React, strong TypeScript habits, and experience building internal tools or data-heavy interfaces.
• Across both profiles: you write pragmatic tests, can own a feature from schema design through deployment, and understand the basics of handling sensitive health data responsibly.

Green flags

• You’ve built a user-facing product journey such as onboarding, profile, or notifications and understand the full lifecycle.
• You’ve worked in health, fintech, or another regulated-data domain where correctness is non-negotiable.
• You’ve used an LLM API in production and understand token costs, reliability, and schema mismatches.
• You ask why before you build, and want to understand the real member experience behind the systems you design.

Why this role

• At many companies an SDE-2 owns a small slice of a feature. At FOXO, you’ll own a meaningful part of the member journey end to end.
• The team is small enough that your decisions compound. A strong data model or API decision you make today can keep paying off for years.
• If you want real product ownership, fast learning, and work where the details matter, this role is built for that.

Benefits:

• Health insurance
• Paid sick time
• Paid time off
• Provident Fund

Ability to commute/relocate:

• Bengaluru, Karnataka: Reliably commute or planning to relocate before starting work (Preferred)

Application Question(s):

• Current CTC
• Expected CTC
• Notice Period

Location:

• Bengaluru, Karnataka (Preferred)

Work Location: In person