Senior Ruby Software Engineer MFX

Trustpair; Paris; Hybride; EUR 50 000 - 70 000; Plein temps

Résumé du poste

A technology company in Paris is looking for an experienced back-end developer specializing in Ruby on Rails to join their Engineering Team. You will play a key role in creating scalable products that combat vendor fraud. The role offers a hybrid work model and emphasizes innovation with AI-powered tools. Collaboration with a diverse team, continuous learning, and significant career growth opportunities are part of the experience. Join us to make an impactful contribution to financial security.

Qualifications

• 5 years of experience in Ruby (Rails) back-end development.
• Ability to conceive the technical design of a complex product feature.
• Experience working on a rapidly growing product.

Responsabilités

• Lead the creation of innovative features by maintaining exceptional code quality.
• Engage in every phase of the SDLC including architecture and launch.
• Support critical services for customer payment security.

Connaissances

Ruby (Rails) back-end development

API development

Agile methodologies (Scrum/Kanban)

Fluent in English

Outils

Docker

AWS

GitLab CI

Description du poste

Trustpair stops vendor fraud before it happens. We are an automated vendor validation platform protecting 400 enterprise companies worldwide. Since 2017, finance and procurement teams have used Trustpair to eliminate vendor fraud while reclaiming 90% of the time they once spent on manual checks.

As vendor fraud grows more sophisticated, we stay ahead by combining deep expertise in financial crime with cutting‑edge technology. Our core product focuses on secure, reliable vendor account validation to wipe out fraud and boost efficiency.

Internally, teams across Trustpair use AI tools in their day‑to‑day work to automate repetitive tasks and unlock strategic insights that help us build and operate better. From day one you’ll be encouraged and trained to integrate these tools into your workflow in a practical, hands‑on way.

With offices in New York, Paris, London and Milan, we are a diverse team united by a bias for action. We ship fast, learn from experiments and tackle problems that matter—protecting billions in payments for companies worldwide. If you want to see your work make an immediate impact in financial security, Trustpair is built for you.

Learn more about how we use AI in our everyday work.

About the role

Integrated into our talented Engineering Team, you’ll work within one of our feature squads on creating a scalable and efficient product that consistently meets the needs of our clients. You’ll work on collaborative topics such as designing new features, implementing functionality, developing, and even testing the application.

Trustpair’s engineering team works with the latest technologies as a Cellular Organization, reshaping and adapting to ensure our teams stay autonomous, independent, and impactful on the decisions made.

This is a permanent contract (CDI) suitable for candidates based in France. Hybrid or full remote within France is possible.

What you’ll do

Take the lead in creating innovative features by following best practices and maintaining exceptional code quality.

Engage in every phase of the SDLC; contribute to the architecture, code development, and even oversee the launch of new releases.

Support critical services for our customers which ensure the security of their payments.

Keep a finger on the pulse of the technology landscape. Identify emerging technologies and industry trends and be proactive in recommending relevant improvements to our existing stack.

Champion engineering excellence by fostering a culture of continuous improvement. Lead by example in practices such as code reviews, Test‑Driven Development (TDD), pair programming, and writing clean, maintainable code.

What's in it for you

High‑Impact in a High‑Growth Environment: Join a company with 50% business growth where tech is one of the core accelerators. You’ll be building solutions for a platform with rapidly increasing usage directly influencing our success.

Shape Our Future

We want your voice in making the critical architectural product and organizational decisions that will define our future.

Modern Stack & AI‑Powered Engineering

Work with a clean Ruby on Rails stack, state‑of‑the‑art DevOps, and managed tech debt. We are aggressively adopting AI both in our product (LLMs) and to boost your own efficiency with tools like Cursor.

Culture of Full‑Fledged Engineering Ownership

We don’t see you as just a developer. You are an engineer with a strong voice and full accountability. We empower you to drive initiatives from technical design to final impact.

Accelerated Career Growth

Our rapid expansion creates constant and significant opportunities for career advancement, skill development, and taking on new leadership responsibilities.

Collaborative & International Team

Thrive in a diverse cross‑functional and international environment. We leverage collective intelligence and a supportive senior team to solve cutting‑edge challenges.

Why join Trustpair? A full list of our perks here!

Must‑Haves

• 5 years of experience in Ruby (Rails) back‑end development
• Ability to conceive the technical design of a complex product feature
• Experience working on a rapidly growing product; knowledge of architectural models of large‑scale web applications
• Experience working in an Agile environment like Scrum or Kanban
• Experience in API development and knowledge of resilience, scalability and security constraints
• Fluent in English
• Desire to work on longer‑term technical challenges & accomplish them

Nice‑to‑Haves

• Experience in full stack development (React, Javascript, Typescript…)
• DevOps culture; ability to work on deployment pipelines and CI/CD tools such as Docker, AWS, GitLab CI
• Experience in an environment where security is important; sensitivity to good security practices
• Experience in mentoring and leadership of junior and experienced people for good practices of software craftsmanship

Recruitment process

• First call with Aicha, Talent Acquisition Manager (30 mins)
• Experience interview with an Engineering Manager (1 h)
• Case study with our Tech Lead & an Engineer from our team (1 h 30 m)
• Coffee fit with a Product Manager & an Engineer (30 mins)
• Cofounders interview with Alexandre, our MD (45 mins)

Equal Opportunity Statement

Trustpair’s policy is to provide equal employment opportunity in all of our employment practices without regard to race, color, religion, sex, national origin, ancestry, marital status, protected veteran status, age, individuals with disabilities, sexual orientation or gender identity or expression, or any other legally protected category.

Applicants for all positions in Trustpair must be legally authorized to work in the country they are applying for or be a citizen from Schengen / EU zone. Verification of employment eligibility will be required as a condition of hire.

Key Skills

Spring, .NET, C/C++, Go, React, OOP, C#, AWS, Data Structures, Software Development, Java, Distributed Systems

Employment Type: Full Time

Experience: years

Vacancy: 1