Senior Backend Web Developer Client Facing Platform EMEA (FMD)

Flowdesk; Paris; Sur place; EUR 70 000 - 90 000; Plein temps

Résumé du poste

A financial technology company in Paris is seeking a Senior Backend Engineer to own their client platform. The ideal candidate will have over 5 years of experience in backend engineering with a strong focus on Rust and secure API development. Responsibilities include leading a small team and ensuring high quality of code. Competitive benefits and a focus on impactful systems design make this role an excellent opportunity.

Prestations

50% of transportation costs

Swile lunch voucher

100% Alan Blue covered for you and your children

Gym membership contribution

Team events and offsites

Qualifications

• 5 years of backend engineering experience in crypto, fintech, or trading environments.
• Production experience in Rust is required.
• Proven track record building secure client-facing APIs.

Responsabilités

• Take technical ownership of the client-facing platform.
• Lead and mentor a small team on code quality and secure practices.
• Work directly with product managers to create seamless workflows.

Connaissances

Backend engineering

Rust

SQL

Event-driven systems

Mentoring

Description du poste

Flowdesks 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 .

At Flowdesk our client platform is the front door to everything we do. Its how institutional clients access trading settlement and reporting with confidence. Were looking for a senior backend engineer who can own this platform end-to-end from the API layer to the workflows our clients depend on every day.

This is a hands‑on role. Youll design and build backend services in Rust and youll set the direction for a small team of backend and fullstack engineers. Together youll deliver a product that is fast reliable and safe for clients. Security and correctness arent add-ons here - theyre the foundation of our business.

What youll do

• Take technical ownership of the client-facing platform - design delivery and continuous improvement.
• Lead and mentor a small team keeping the bar high on code quality and secure engineering practices.
• Work directly with product managers and frontend engineers to turn client needs into seamless end-to-end workflows.
• Build and evolve APIs in Rust with security and clarity at their core.
• Ensure everything shipped follows best practices (OWASP Top 10 SQL safety authentication / permissions).
• Keep close to the product - think about features not just as code but as tools our clients use to trade with confidence.

Requirements

What were looking for

• 5 years of backend engineering with significant time in crypto fintech or trading environments.
• Production experience in Rust is required.
• Proven track record building secure client-facing APIs.
• Strong knowledge of SQL and event-driven systems.
• A product mindset - you care about the why not just the how.
• Experience mentoring or leading engineers in small teams.
• A pragmatic commitment to shipping high quality systems

Nice to have

• Familiarity with trading workflows (orders balances settlements).
• Contributions to Rust or security-related open source projects.
• Understanding of regulatory / compliance in financial platforms.

Benefits

• 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
• Wellpass contribution to gym membership
• Team events and offsites

Heres what you can expect if you apply

• HR call (30) Get to know Flowdesk and discuss your experience.
• Take home assignment A practical challenge to assess your technical skills.
• Technical Interview with our Lead Fullstack Engineer (90) Deep dive into your technical background and problem-solving abilities.
• Team fit (60) Get to know you future teammates and get an introduction to our working environment.
• Wrap Up Interview (45) Learn about Flowdesks culture and how we work.
• C-Level Interview (30)

We focus on conversations not trick questions. These discussions will help you understand how Flowdesk operates and allow you to share your journey and what youre looking for in your next role.

If you measure your success not by features shipped but by the business impact of the systems you build then this role offers the level of accountability youre looking for. Lets get in touch and discuss about the specific challenges and ownership this role entails.

Required Experience :

Senior IC

Key Skills

Bootstrap,MVC,CSS,.NET,HTML5,React,Web Development,ASP.NET,AJAX,Angular,JavaScript,PHP

Employment Type : Full-Time

Experience : years

Vacancy : 1