PstrongJob Title /strong: Senior Full-stack Engineer (Node.js / React) /ppstrongTeam /strong: Assets (Crypto Fiat Management) /ppstrongLocation /strong: Onsite - Ticino, Switzerland /ppbr/ppstrongAbout Us /strong /ppWe are a new, well-funded RD 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. /ppWe 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: /pullistrongGolden Ratio Exchange: /strong An advanced, security-first exchange for professional traders. /lilistrongGRX Pay: /strong A seamless payment gateway that allows merchants to accept crypto and receive fiat. /li /ulpbr/ppThis 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 RD hub in strongTicino, Switzerland /strong, and are looking for core team members to build this new culture with us. /ppbr/ppstrongThe Role /strong /ppWe are looking for a Senior Full-stack Engineer to be the core technical pillar of our new strongAssets team /strong. This is a hands-on technical leadership role emwithout /em people management responsibilities. This is one of the most critical and complex roles in our company, responsible for the entire lifecycle of customer funds. /ppIn our structure, the "Manager" defines the emwhy /em and emwhat /em (product) and manages the emwho /em (people). As the "Senior Engineer," you are the undisputed technical expert responsible for the deep emhow /em. You will own the architecture and execution of all systems that manage crypto and fiat assets. /ppYour mission is to architect, build, and maintain the microservices for blockchain infrastructure, fiat payment processing, and user fund management. You will work across the entire stack (Node.js, React, PostgreSQL) to build highly secure, reliable, and compliant systems. You will also be responsible for re-architecting our legacy asset management systems and migrating them to a modern, service-oriented architecture. /ppstrongThis is a full-time, onsite role at our new RD hub in Ticino, Switzerland. /strong Given the high-security nature of the Assets team, we believe co-location is essential for building a robust, trust-based engineering culture. /ppbr/ppstrongWhat You'll Do /strong /pullistrongArchitect and Build: /strong Design, build, and maintain the new "Assets" microservices using Node.js (Nest.js) and PostgreSQL. These services are responsible for: /lilistrongBlockchain Infrastructure: /strong Transaction broadcasting, fund consolidation, and wallet management. /lilistrongFiat Infrastructure: /strong Integrating with banks and payment providers for fiat transaction processing. /lilistrongCore Asset Functions: /strong The complete functionality for user deposits, withdrawals, and internal transfers to other GRX users. /lilistrongFee Systems: /strong The foundational functionality for GRX fees. /lilistrongFull-Stack Development: /strong Build the user-facing front-end components (in React) for the "Assets page," "Dashboard page," and "Statement reports" for tax purposes. /lilistrongLegacy Migration: /strong Analyze the existing legacy codebase for asset and wallet management. Design and execute a clear migration strategy to the new architecture with zero downtime. /lilistrongTechnical Leadership: /strong Act as the primary technical mentor for other engineers on the team, performing in-depth code reviews and solving the most complex architectural challenges. /lilistrongSecurity Compliance: /strong Work closely with the Manager to ensure all systems are fully compliant with MiCA, "Travel Rule" regulations, and principles of asset safeguarding and segregation. /lilistrongMaintain Legacy Systems: /strong Analyze and maintain existing systems, such as "GRX Codes," while evaluating their compliance and long-term utility. /li /ulpbr/ppstrongWhat We're Looking For /strong /pullistrongExperience: /strong 5+ years of professional experience in full-stack development. /lilistrongDomain Expertise: /strong strongDirect experience in FinTech, banking, or cryptocurrency is a hard requirement for this role. /strong You must have experience building systems that move or manage money. /lilistrongBack-end Expertise: /strong Expert-level knowledge of strongTypeScript /strong and strongNode.js /strong. /lilistrongFront-end Proficiency: /strong Strong proficiency in strongReact.js /strong and modern front-end practices. /lilistrongDatabase Skills: /strong Deep experience with relational databases (strongPostgreSQL /strong). /lilistrongBlockchain Knowledge: /strong A strong, practical understanding of blockchain principles, wallets (hot/cold), and transaction lifecycles. /lilistrongLegacy Systems Experience: /strong Demonstrable experience working with and refactoring large, existing codebases. /lilistrongArchitectural Skills: /strong Strong understanding of microservices architecture, secure API design, and event-driven patterns. /lilistrongLocation: /strong Willingness to work strongonsite in Ticino, Switzerland /strong. /lilistrongMentorship: /strong A passion for mentoring other engineers and raising the technical bar for the entire team. /li /ulpbr/ppstrongBonus Points /strong /pulliDirect experience running or interacting with blockchain nodes (e.g., Bitcoin, Ethereum). /liliExperience with fiat payment processor integrations (e.g., Stripe, Braintree, or bank APIs). /liliExperience with message brokers (strongRabbitMQ /strong) and strongRedis /strong. /li /ulpbr/ppstrongWhat We Offer /strong /pullistrongHigh-Impact Role: /strong A unique opportunity to be the founding technical expert for our core assets engine. /lilistrongClear Ambition: /strong The chance to join a company with a clear goal of becoming the #1 crypto platform in the EU. /lilistrongClear Career Path: /strong A role focused purely on technical excellence and architecture, without the burden of people management. /lilistrongOnsite Culture: /strong A fantastic opportunity to build a new RD culture from the ground up in our modern Ticino, Switzerland office. /lilistrongGreenfield Culture, Brownfield Code: /strong A rare chance to join a new company culture with no baggage, while solving the interesting technical challenges of a mature product. /li /ul