Senior Exchange Connectivity Engineer (F/M/D)

Flowdesk; Paris; Sur place; EUR 60 000 - 80 000; Plein temps

Résumé du poste

A leading digital finance firm in France is seeking a Senior Exchange Connectivity Engineer to design and maintain integrations with major crypto exchanges. The ideal candidate will have 3–5+ years in software engineering and hands-on experience in crypto integration. You will ensure ultra-reliable connectivity, optimize systems, and mentor junior engineers in a collaborative environment.

Prestations

50% transportation costs

Swile lunch voucher

100% health coverage for you and children

Gym contribution

Team events and offsites

Qualifications

• 3–5+ years of professional software engineering experience.
• 1+ year hands-on experience in crypto exchange integration.
• Strong knowledge of networking fundamentals like HTTP and WebSocket.

Responsabilités

• Design and implement exchange connectivity modules for crypto venues.
• Optimize order entry and market data ingestion for performance.
• Mentor junior engineers and help shape best practices.

Connaissances

Exchange connectivity design

Networking fundamentals

Proficiency in Rust

Typescript ability

Problem-solving

Description du poste

Flowdesk's mission is to build a global financial institution for digital assets, one designed from the ground up for market integrity and efficiency.

To achieve this in a rapidly evolving market, we apply a disciplined, first-principles approach to everything we do. This approach is embedded in our core services, from institutional liquidity provision, trading solutions, OTC execution to our comprehensive treasury management offerings. This is how we cut through the noise and build robust and scalable systems across all our business lines.

We seek individuals who are driven by this systematic approach. Joining Flowdesk means you will be a key contributor in building and scaling a more transparent and efficient financial markets infrastructure.

We are looking for a Senior Exchange Connectivity Engineer to design, build, and maintain our integrations with major crypto exchanges. You will work at the core of our trading infrastructure, ensuring ultra-reliable, low-latency connectivity and driving improvements across protocols, networking, and systems.

Responsibilities

• Design and implement exchange connectivity modules (REST, WebSocket, FIX, proprietary APIs) for leading crypto venues.
• Optimize order entry, market data ingestion, and account management for performance and reliability.
• Contribute to a robust, fault-tolerant, and scalable connectivity framework in Rust and Typescript.
• Collaborate closely with trading, infra, and product teams to deliver high-quality exchange integrations.
• Monitor, debug, and continuously improve production systems.
• Mentor junior engineers and help shape best practices.
• Some on-call coverage may be required.
• Some travel may be required.

Background & experience

• 3–5+ years of professional software engineering experience.
• At least 1+ year hands-on experience in crypto exchange integration.
• Strong knowledge of networking fundamentals, HTTP, WebSocket, TCP, TLS.
• Proficiency in Rust, or strong C++ background with some Rust exposure.
• Typescript ability.
  

Nice to Have

• Experience with Web3 / DeFi protocols and integrations.
• Leadership or mentoring experience in an engineering team.
• Experience with TradFI connectivity (ITCH / OUCH / UDP Multicast, etc.)

Skills and personality

• Highly organized and detail-oriented.
• Independent achiever, comfortable taking ownership of significant projects end-to‑in‑end.
• Willing to tinker, debug, and dig into problems from first principles.
• Strong documentation habits and ability to clearly share knowledge.
• Mentorship mindset – able to guide junior engineers and peers.

Company Culture and Values

At Flowdesk, our culture drives our success. Here’s how we live it

• Ambition, We aim to conquer an impactful place in the crypto ecosystem while representing Tech expertise. We're always moving quickly toward our goals.
• Ownership, If you believe in something, own it, make it happen, or at least learn from it.
• Humility, The final result is a puzzle built by everyone’s efforts—not one person takes all the credit.
• Collaboration, While speed matters, we believe in waiting for others to move forward together. That’s how we achieve success as a team.

• International environment (English is the main language)
• 50% of transportation costs & a sustainable mobility agreement
• Swile lunch voucher (€9.25 per day, 60% covered)
• 100% Alan Blue covered for you and your children
• Team events and offsites
• Gymlib contribution to gym membership

Recruitment process

Are you interested in this job but feel you haven't ticked all the boxes? Don't hesitate to apply and tell us in the cover letter section why we should meet!

Here’s what you can expect if you apply

1. HR interview
2. Technical Interview with the Hiring Manager
3. Technical test
4. Debriefing Technical Test
5. Team Meeting
6. Wrap up interview and interview with the CTO
   

On the agenda, discussions rather than trick questions! These moments of exchange will allow you to understand how Flowdesk works and its values. But they are also (and above all) an opportunity for you to present your career path and your expectations for your next job!

We are committed to an inclusive and accessible recruitment process. If you require any reasonable adjustments or have specific needs to enable you to participate fully in the interview or assessment process (e.g., a sign language interpreter, extra time for a test, or an accessible location), please contact us to discuss how we can support you.