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# Full Stack Engineer (FinTech)

- **Company:** SEALTH LLC
- **Location:** United States (Remote available)
- **Experience:** Experienced
- **Salary:** $140,000.0 - $200,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Code Review, Relational Databases, Payment Systems, PostgreSQL, Node.Js, Blockchain, Next.js, TypeScript, Web 2.0, Web Applications, ReactJS, Backend, Event Driven Architecture, Solidity, Apache Kafka, Graphql, Web3.js, Api Design
- **Published:** July 11, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=fce7af4937c17afb

## About the Role

+ Advanced smart contract experience in the DeFi space.
*

 + Hands-on with leading protocols and infrastructure: ideally Centrifuge, Fireblocks, oracles, and a range of DeFi protocols.
*

 + Able to design, integrate, and optimize protocol interactions
 * that meet the standards of both institutional and retail users.
 * Web2 / infrastructure breadth (essential):
 * Comfortable deploying and operating infrastructure on AWS.
 * A strong senior-level backend software engineer.
 * Fluent working across the Web2 financial technology ecosystem.
 * Operates autonomously with very little oversight.
 * Takes ownership end to end and moves quickly with minimal direction.
 * Operates with sense of urgency 4+ years of full-stack engineering experience
 * Strong in TypeScript, Node.js (NextJS or Express), and React/Next.js
 * Solid understanding of relational databases (PostgreSQL) and REST/GraphQL API design
 * Familiarity with Web3 tooling: ethers.js or viem, wallet connections, on-chain reads
 * Experience with event-driven architecture (Kafka, Pub/Sub, or similar)
 * Bonus: prior fintech experience (payment rails, ledger systems, compliance infrastructure)
 * Bonus: Solidity or Rust (even hobby-level) is a real differentiator

## Description

* Build and maintain full-stack features across our web app and API layer
 * Design and implement backend services in TypeScript/Node.js with PostgreSQL
 * Develop React/Next.js frontends that are fast, accessible, and production-grade
 * Integrate with blockchain data sources, smart contracts, and wallet infrastructure
 * Work closely with the PM and design on implementation feasibility and tradeoff decisions
 * Write tests, participate in code reviews, and own your features end-to-end


## Related Videos

- [​Road to Web3](https://www.wearedevelopers.com/videos/584-road-to-web3)
- [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock)
- [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library)
- [Smart Contract fundamentals - My first DApp](https://www.wearedevelopers.com/videos/52-smart-contract-fundamentals-my-first-dapp)
- [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape)
- [Future-Proofing FinTech With Blockchain Technology](https://www.wearedevelopers.com/videos/808-future-proofing-fintech-with-blockchain-technology)

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