Senior Full-Stack Engineer

Job TitleSenior Full-stack Engineer (Node.js / React)TeamAssets (Crypto & Fiat Management)LocationOnsite – Ticino, SwitzerlandAbout UsWe are 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.Core ProductsGolden 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.The RoleWe are looking for a Senior Full-stack Engineer to be the core technical pillar of our new Assets team.This is a hands-on technical leadership role without people-management responsibilities.As the Senior Engineer, you are the undisputed technical expert responsible for the deep how.You will own the architecture and execution of all systems that manage crypto and fiat assets.What You'll DoArchitect and Build Microservices– Design, build, and maintain the new "Assets" microservices using Node.js (Nest.js) and PostgreSQL.These services handle blockchain infrastructure, fiat infrastructure, core asset functions, and fee systems.Full-Stack Development– Build user-facing front-end components (React) for the "Assets page," "Dashboard page," and "Statement reports" for tax purposes.Legacy Migration– Analyze the legacy codebase for asset and wallet management and execute a zero-downtime migration strategy.Technical Leadership– Act as the primary technical mentor for other engineers, performing in-depth code reviews and solving the most complex architectural challenges.Security & Compliance– Work closely with the Manager to ensure all systems are fully compliant with MiCA, "Travel Rule" regulations, and principles of asset safeguarding and segregation.Maintain Legacy Systems– Analyze and maintain existing systems (e.g., "GRX Codes") while evaluating compliance and long-term utility.What We're Looking ForExperience– 5+ years of professional experience in full-stack development.Domain Expertise– Direct experience in FinTech, banking, or cryptocurrency is a hard requirement.Back-end Expertise– Expert-level knowledge of TypeScript and Node.js.Front-end Proficiency– Strong proficiency in React.js and modern front-end practices.Database Skills– Deep experience with PostgreSQL.Blockchain Knowledge– Practical understanding of wallets, transaction lifecycles, and blockchain principles.Legacy Systems Experience– Demonstrable experience refactoring large, existing codebases.Architectural Skills– Strong understanding of microservices architecture, secure API design, and event-driven patterns.Location PreferenceWillingness to work onsite in Ticino, Switzerland.MentorshipA passion for mentoring other engineers and raising the technical bar for the entire team.Bonus PointsDirect experience with blockchain nodes (Bitcoin, Ethereum).Experience with fiat payment processor integrations (Stripe, Braintree, or bank APIs).Experience with message brokers (RabbitMQ) and Redis.What We OfferHigh-Impact Role– Founding technical expert for our core assets engine.Clear Ambition– Join a company striving to be the #1 crypto platform in the EU.Clear Career Path– Focus purely on technical excellence and architecture, without people-management burden.Onsite Culture– Build a new R&D culture from the ground up in modern Ticino, Switzerland.Greenfield Culture, Brownfield Code– Rare chance to join a new company culture with no baggage while solving mature product challenges.#J-*****-Ljbffr