Back-end Developer (Blockchain)

## **Company Overview & Vision** Founded in Singapore in April 2026, BitFit Labs is a dynamic software development startup dedicated to building high-quality, custom blockchain-related products tailored specifically to our customers' requirements. Our diverse product lineup includes centralized/decentralized cryptocurrency exchange solutions, secure crypto wallets, smart contracts, dApps, and more. We turn complex blockchain capabilities into seamless, secure, and intuitive user experiences for clients worldwide. ### **Role Summary** We are seeking a robust **Backend Engineer** to design, build, and scale the core services powering our customer-tailored products. You will be responsible for the architecture behind our cryptocurrency exchange solutions, wallet transaction management, and secure APIs that bridge off-chain data with on-chain smart contracts. ### **What You’ll Do** - Architecture: Design and implement scalable, secure APIs (REST/GraphQL) and microservices using Node.js (NestJS) or Go/Rust. - Core Product Development: Build logic for crypto exchange order books, wallet transaction routing, and secure user management systems. - Data & Blockchain Management: Handle integration with blockchain networks, transaction tracking, and secure database management (PostgreSQL, Redis). - Security First: Ensure high-grade security standards for financial data, user assets, and system integrations. ### **What We’re Looking For** - Experience: 3+ years of backend development experience, preferably in fintech, e-commerce, or crypto-focused environments. - Tech Stack: Deep expertise in Node.js (TypeScript), Go (Golang), or Rust. - System Design: Strong knowledge of relational/non-relational databases, caching strategies, and asynchronous event processing. - Problem Solver: Ability to understand diverse customer requirements and translate them into clean, modular backend architecture.