Full-stack Engineer (Node.js / React)

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 RabbitMQ, Redis, and WebSockets).

What We're Looking For

Experience:

3+ years of professional experience in full-stack development. Domain Expertise:

Experience in FinTech, 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

TypeScript

and

Node.js

. Experience with

Nest.js

is a major plus. Real-time Systems:

Strong experience with

RabbitMQ

(or similar message brokers) and

Redis

. You must be comfortable with asynchronous, event-driven architecture. Database Skills:

Solid experience with relational databases (

PostgreSQL

) and writing efficient queries. Front-end Proficiency:

Good experience with

React.js

and experience with real-time front-ends (e.g.,

WebSockets

). 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., TradingView, 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.