Lead the technical direction and implementation of the central off-chain coordination system for our next-generation architecture.
Design, implement, and maintain the highly available, low-latency APIs required for seamless application interaction, quote management, and system-wide status retrieval using Node.js/TypeScript and the NestJS framework.
Develop advanced and rigorous validation mechanisms to ensure data integrity and prevent fraudulent activity within the system.
Build and optimize the infrastructure for immediate, real-time broadcasting of critical, validated data to all participating external liquidity providers and execution partners.
Integrate with specialized data indexing services to reliably monitor and track the multi-phase lifecycle of core system objects across distributed environments.
Implement advanced logic for data aggregation, caching, and mechanisms for partner reputation and selection to ensure the best possible user experience.
Proactively identify and resolve potential security vulnerabilities in the off-chain coordination flow to maintain the trustless nature of the overall system.
Work closely with the core Smart Contract and Product teams, and ensure comprehensive documentation for the backend architecture and APIs.

5+ years of backend development experience building and scaling high-throughput, mission-critical services.
Expert proficiency in TypeScript/Node.js, with deep working experience using the NestJS framework for building scalable backend applications.
Deep understanding of blockchain data and security primitives, including EIP-712 signatures, transaction execution flows, and reading on-chain events/logs.
Proven experience in designing and scaling real-time communication systems (e.g., WebSockets, Redis Pub/Sub patterns).
Solid experience with relational databases (PostgreSQL, etc.) and optimizing complex queries.
Strong system design skills, with the ability to build fault-tolerant and highly available microservices.
Experience with monitoring, logging, and observability tools to maintain system health.
Ability to work autonomously, prioritize tasks effectively, and drive complex projects to completion in a fast-paced environment.

Annual team offsites (Thailand in 2023 and Vietnam in 2024 were a blast, Marrakech in March 2025 was blast-ier; let’s see what happens in 2026!)
30 days of PTO
Flexible remote days
Flexible working hours
Equity participation from day 1
Entitlement to work computer (choice of equipment)
An annual 1,000€ personal development budget once you have worked 6+ months (pro-rated the first year)
A one-time 1,000€ remote budget to use on coworking, office setup, etc.

Senior Backend Engineer – Intents API

Key skills