Senior Full Stack Engineer (TypeScript) at Rebind

About Rebind

Rebind’s mission is to make modern finance simple, open, and self-custodial.
We’re building an intuitive way for anyone to earn, manage, and move money — powered by crypto rails, yet designed to feel as seamless as your favorite fintech app.

Our goal is to redefine open finance through design clarity, technical rigor, and user empowerment.

About the Role

We’re looking for a Senior Full Stack Engineer to help build the backend infrastructure powering our open finance platform. You’ll be joining a small, hands-on team in Paris, working directly with the founders across design, mobile, and engineering to bring Rebind’s vision to life.

You’ll own core backend systems, design resilient data flows, and shape how we scale. If you thrive in fast-paced environments, care deeply about product detail, and want to contribute to meaningful infrastructure that impacts users globally, this role is for you.

Why Join

• Impact: Own foundational backend components that will define how we scale and ship new financial features.

• Excellence: Collaborate with a high-performing team that values clarity, speed, and long-term maintainability.

• Autonomy: Work with end-to-end ownership and directly influence product decisions.

• Culture: A small, high-trust environment with minimal bureaucracy and meaningful work.

Responsibilities

• Shape and scale backend infrastructure using TypeScript (Hono), Postgres, and QuestDB — defining contracts (OpenAPI), building abstractions, and ensuring resilience.

• Build a blockchain indexing layer that tracks balances, on-chain positions, yield performance, and related events for Rebind users. (Bonus: experience with Envio.)

• Support secure financial flows by developing transaction pipelines for smart account wallets (ERC-4337), managing wallet creation, key management, and performance optimization.

• Integrate DeFi primitives such as ERC-4626 vaults, handling chain abstraction and transaction efficiency.

• Collaborate cross-functionally with designers and frontend engineers to ensure backend logic enhances user experience.

• Solve complex technical problems across architecture, data synchronization, and real-time UX.

Requirements & Qualifications

• Proven experience building and maintaining complex backend systems at scale.

• Strong understanding of TypeScript, databases, and distributed systems.

• Ownership mindset: You take full responsibility for outcomes, not just deliverables.

• Bias for action: You move quickly, learn fast, and adapt under uncertainty.

• Resilience: You stay composed under pressure and drive progress when challenges arise.

• Mission-driven: You believe in building an open, mobile-first financial system on crypto rails.

• Pragmatic problem solver: You optimize for user value, not hype or complexity.

• Collaborative communicator: You think clearly, welcome feedback, and work well in a flat, feedback-rich culture.

• Product-aware: You see backend logic as part of the full user experience — not just code.

Benefits & Perks

• A front-row seat to the future of finance — contribute to a product at the cutting edge of open, self-custodial systems.

• Competitive salary and meaningful equity options.

• Hybrid culture: We value in-person collaboration in Paris but support remote flexibility.

• Unlimited time off: Take time when you need it — we trust alignment over tracking.

• Focused, low-overhead environment — clear goals, fast iteration, and genuine autonomy.

• High-quality hardware setup (MacBook Pro, large display, accessories).

🫶 We value diverse perspectives.
If you come from an underrepresented background in tech or finance, we strongly encourage you to apply.