Full-stack engineer

Job Title : Full-stack Engineer (Node.js / React) Team : Market (Trading & Liquidity) Location : Onsite - Ticino, Switzerland About Us We are a new, well-funded R&D company with a clear vision: to build the future of cryptocurrency infrastructure. Our ambition is to become the #1 cryptocurrency platform in the EU by market share within the next three years. We are starting with a proven, operational crypto platform and are now assembling a world-class team to evolve it to the next level. Our core products include: Golden Ratio Exchange: An advanced, security-first exchange for professional traders. GRX Pay: A seamless payment gateway that allows merchants to accept crypto and receive fiat. This is a rare opportunity to join a fresh company culture from day one, while working on the exciting technical challenges of a mature product. We are building our foundational R&D hub in Ticino, Switzerland , and are looking for core team members to build this new culture with us. The Role We are looking for a skilled Full-stack Engineer to be a key member of our new Market team . This is a hands-on builder role at the very heart of our exchange, focusing on high-performance, real-time trading and liquidity systems. You will work closely with the Senior Engineer and Manager to build and maintain the low-latency microservices for our exchange, as well as the sophisticated systems that manage our internal and external market liquidity. You will be a key contributor to re-architecting our legacy trading systems and migrating them to a modern, scalable, and reliable architecture. This is a full-time, onsite role at our new R&D hub in Ticino, Switzerland. Given the critical, high-performance nature of the trading engine, we believe co-location is essential for rapid innovation and building a resilient engineering culture. What You'll Do Build and Maintain: Actively contribute to building and maintaining the high-performance services for our exchange using Node.js, including: The Orders management system. The Trade matching engine. The core Ledger for recording all transactions. Contribute to Liquidity Systems: Help build and maintain the systems that manage our platform's liquidity, including: Automated balancing of internal funds. Automated external balancing via integrations with other platforms (e.g., Kraken). Manual tools and reporting for the liquidity team. Full-Stack Development: Build and maintain the user-facing React components for our trading products, such as: "Trading view with candles" . The "Quick convert" feature. The "Crypto Onramp" (fiat-to-crypto) journey. Legacy Migration: Support the Senior Engineer in analyzing the existing legacy codebase for trading and liquidity and execute the migration strategy. Uphold Standards: Write high-quality, maintainable, and well-tested code, following the best practices for performance and reliability set by the team. Performance Tuning: Help profile, optimize, and ensure low-latency communication across our trading systems (e.g., via Rabbit MQ, Redis, and Web Sockets). What We're Looking For Experience: 3+ years of professional experience in full-stack development. Domain Expertise: Experience in Fin Tech, trading, or building real-time systems is strongly preferred. You must have a demonstrable interest in high-performance, low-latency systems. Back-end Expertise: Strong proficiency in Type Script and Node.js . Experience with Nest.js is a major plus. Real-time Systems: Strong experience with Rabbit MQ (or similar message brokers) and Redis . You must be comfortable with asynchronous, event-driven architecture. Database Skills: Solid experience with relational databases ( Postgre SQL ) and writing efficient queries. Front-end Proficiency: Good experience with React.js and experience with real-time front-ends (e.g., Web Sockets ). Legacy Systems Experience: Experience working with and refactoring existing codebases. You are comfortable diving into code you didn't write. Location: Willingness to work onsite in Ticino, Switzerland . Team Player: A collaborative attitude and a desire to learn and grow with the team. Bonus Points Direct experience building a cryptocurrency exchange matching engine. Experience with real-time data visualization libraries (e.g., Trading View, D3.js). Experience integrating with third-party exchange APIs (e.g., Kraken, Binance). What We Offer High-Impact Role: An opportunity to make a huge impact by building our core trading and liquidity engine. Clear Ambition: The chance to join a company with a clear goal of becoming the #1 crypto platform in the EU. Clear Career Path: A role with a clear path for growth in technical excellence, with mentorship from senior engineers. Onsite Culture: A fantastic opportunity to build a new R& D culture from the ground up in our modern Ticino, Switzerland office. Greenfield Culture, Brownfield Code: A rare chance to join a new company culture with no baggage, while solving the interesting technical challenges of a mature product.