Senior Fullstack Developer, Web3 (NestJS & React)

Senior Fullstack Developer, Web3 (NestJS & React)
Lisboa
Lisboa, Lisboa, Portugal

Senior Fullstack Developer, Web3 (Nest
JS & React)

Join to apply for the Senior Fullstack Developer, Web3 (Nest
JS & React) role at Block Labs

About the Role

As a Senior Fullstack Engineer, you will design and develop scalable,
- performance applications that integrate blockchain technologies. You'll work across both frontend and backend, collaborating closely with engineering and product teams to build
-
- end Web3 experiences. Your focus will be on creating secure, seamless, and performant applications that interact with smart contracts, wallets, and decentralized protocols.

Key Responsibilities

Develop and maintain backend services using Nest
JS (Node. js, Type
Script).
Build responsive,
- performance user interfaces using React and Type
Script.
Design and implement secure, scalable APIs for Web3 applications.
Implement wallet interactions,
- chain transactions, and
- time updates in the frontend.
Implement
- party integrations for
- ramps, swaps, and other blockchain services.
Optimize database queries, caching strategies, and frontend rendering for performance and scalability.
Build and maintain
- driven architectures for blockchain transaction processing.
Implement authentication and authorization mechanisms, including Web3 identity solutions.
Ensure security best practices across the stack, including encryption, access control, and smart contract interactions.
Collaborate with product, design, and engineering teams to ship
- impact features.
Write clean, maintainable, and testable code while contributing to documentation and code reviews.
Help shape internal standards and developer experience in a
- moving Web3 environment.

About You

4+ years of backend development experience with Node. js and Type
Script.
2+ years working with Nest
JS or similar frameworks.
Experience designing and maintaining APIs optimized for mobile applications.
Strong understanding of blockchain fundamentals and experience integrating with EVM-compatible chains.
Experience with Dev
Ops tools and cloud providers.
Knowledge of authentication best practices and Web3 identity solutions.
Strong
- solving skills and ability to work autonomously in a
- first environment.
Experience with Fireblocks or similar MPC-based custody platforms is a plus.