MLabs
Senior Backend Engineer - Intents API
MLabsFrance8 hours ago
Full-timeRemote FriendlyOther
Senior Backend Engineer (Intents & Order Infrastructure)

Location: Remote - Based in EMEA regions

compensation: $130K - $165K

We are simplifying multi-chain DeFi for traditional financial institutions, fintechs, and service providers. Our platform offers a unified API to access all on-chain liquidity across major blockchains, ensuring the best prices for same-chain and cross-chain swaps. We are a passionate, remote-first team on a mission to enable a fairer, more decentralized world by making complex blockchain technologies accessible to everyone.

We are looking for a Senior Backend Engineer to lead the development and scaling of our core off-chain coordination service. This is a critical infrastructure role, as the Order Server acts as the central hub for the entire Intent lifecycle—from quote aggregation and validation to real-time broadcasting and cross-chain status tracking.

In this role, you will build secure, high-throughput systems using TypeScript and NestJS that allow applications to discover competitive quotes while protecting the network from fraudulent orders. This position is vital for the success of our solver-based architecture and requires a deep focus on security, performance, and reliability.

Key Responsibilities:

  • System Architecture: Design and maintain highly available, low-latency APIs for quote management and system-wide status retrieval
  • Security & Validation: Develop rigorous mechanisms to ensure data integrity, including digital signature verification (EIP-712), timing constraints, and co-signature logic
  • Real-Time Distribution: Build and optimize infrastructure for the immediate broadcasting of validated data to external liquidity providers and execution partners
  • Lifecycle Tracking: Integrate with data indexing services to monitor the multi-phase status of core system objects across distributed environments
  • Optimization: Implement advanced logic for data aggregation, caching, and partner reputation systems to ensure an optimal user experience
  • Collaboration: Work closely with Smart Contract and Product teams to ensure seamless integration and provide comprehensive documentation for backend architecture

Requirements

We are seeking a candidate who thrives in a fast-paced environment and is motivated by high-stakes technical challenges.

  • Location: Remote within the EMEA region (Europe, Middle East, Africa)
  • Experience: 5+ years of backend development experience building and scaling mission-critical, high-throughput services
  • Technical Stack: Expert proficiency in TypeScript/Node.js and deep experience with the NestJS framework
  • Web3 Knowledge: Deep understanding of blockchain security primitives (EIP-712), transaction execution flows, and reading on-chain events/logs
  • Systems Design: Strong ability to build fault-tolerant microservices and experience with real-time systems (WebSockets, Redis Pub/Sub)
  • Databases: Solid experience with relational databases (PostgreSQL) and complex query optimization
  • Professionalism: Ability to work autonomously, prioritize tasks effectively, and "own" projects from end-to-end

Nice to Haves:

  • Experience with blockchain indexing services (e.g., The Graph, Goldsky)
  • Familiarity with Intent-centric architectures, Solvers, or off-chain order matching
  • Direct experience with cross-chain message passing or oracles (e.g., Wormhole)
  • Knowledge of Infrastructure as Code (Terraform) and cloud-native deployments (K8s, AWS/GCP)

Benefits

We believe in ownership, continuous learning, and maintaining a light-hearted, respectful culture.

  • Ownership & Equity: Equity participation from Day 1
  • Rest & Relaxation: 30 days of Paid Time Off (PTO)
  • Global Connectivity: Annual team offsites (previous locations include Thailand, Vietnam, and Morocco)
  • Remote Setup: A one-time €1,000 remote budget for your home office or coworking space, plus your choice of high-end work equipment
  • Professional Growth: An annual €1,000 personal development budget (after 6 months)
  • Flexibility: Fully remote work within EMEA with flexible working hours
  • Culture: A "fail forward" environment that encourages bold decisions and accountability

Due to the high volume of applications we anticipate, we regret that we are unable to provide individual feedback to all candidates. If you do not hear back from us within 4 weeks of your application, please assume that you have not been successful on this occasion. We genuinely appreciate your interest and wish you the best in your job search.

Commitment to Equality and Accessibility:

At MLabs, we are committed to offer equal opportunities to all candidates. We ensure no discrimination, accessible job adverts, and providing information in accessible formats. Our goal is to foster a diverse, inclusive workplace with equal opportunities for all. If you need any reasonable adjustments during any part of the hiring process or you would like to see the job-advert in an accessible format please let us know at the earliest opportunity by emailing [email protected].

MLabs Ltd collects and processes the personal information you provide such as your contact details, work history, resume, and other relevant data for recruitment purposes only. This information is managed securely in accordance with MLabs Ltd's Privacy Policy and Information Security Policy, and in compliance with applicable data protection laws. Your data may be shared only with clients and trusted partners where necessary for recruitment purposes. You may request the deletion of your data or withdraw your consent at any time by contacting [email protected].

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