Senior Software Engineer - PayOut & Fraud

Back Market Software Engineer Position

We're here to help make tech reliable, affordable, and better than new. We're a global marketplace for refurbished devices, helping lower our collective environmental impact by providing trustworthy, affordable tech with 92% less carbon emissions than new.

Are you ready to join us?

Our technology department, known as the Bureau of Technology (BoT), is at the heart of Back Market. It consists of over 30 dynamic product teams that are engaged in developing and managing services to deliver significant value to our customers and suppliers. These teams are effectively supported by our Platform group, which includes more than 10 specialized teams addressing cross-cutting technical issues to enhance our operational capabilities.

In addition to these functional teams, we have established numerous groups dedicated to sharing knowledge across various technical disciplines, such as security, backend, frontend, AI, and mobile. These groups serve as hubs for collaboration and professional development, providing ample learning opportunities and fostering a culture of continuous improvement.

The Payout team at Back Market is at the heart of our marketplace's financial engine, responsible for ensuring that sellers and customers are paid quickly, securely, and reliably.

As a Software Engineer, you will work closely with all members of your squad, and the Staff engineer of your group. Bi-monthly rituals with your group and the Chapter will allow you to share what works for your squad, learn what works for others, and make sure your technical direction is aligned with the overall vision.

We're looking for versatile engineers who show strong ownership and are motivated to take on new challenges across the technical stack while helping us move our technology forward.

You will be working in an agile "build it and run it" environment where engineering teams build, launch, monitor and support the product that they own. Driven by the desire to craft outstanding products, you understand how to deliver seamless user experiences at scale.

We are looking for passion in creating systems by producing clean, consistent and well-organised code. As well as a good team player supporting colleagues and creating a learning and sharing environment!

English must be a no-brainer as you will join an international team dispatched in different locations around the world (US/FR/ES/JP). Our technical environment Backend stack: Python - FastAPI, SQLAlchemy, Celery, Golang, Django (being phased out) Frontend stack: VueJS, Typescript, Nuxt, Revolve (our design system) Data: PostgreSQL, Redis, Kafka, RabbitMQ, BigQuery Infrastructure: GCP, Kubernetes, Docker, Datadog, ArgoCD, CircleCI, Github

Main technical challenges Traditionally based on a monolith, Back Market's technical stack has been undergoing a radical transformation in recent years into a distributed and service-oriented architecture. This transition provides an opportunity to modernize the platform, raising engineering standards. Building a set of efficient and loosely coupled services is one of the main challenges to face for the years to come. But teams are excited to independently control their release schedules, manage their data, SLAs, tools, and – ultimately – be responsible for their own service-offering. Meanwhile, Platform teams are working to provide a scalable, consistent and secure platform, one that makes engineering teams more productive.

As a SENIOR I Engineer: Produce, Innovate & Share

• Facilitates meaningful discussions around complex issues.
• Suggests or makes improvements for existing designs and architecture for quarter-bounded projects or mission-critical areas in their squad.
• Explores technologies with sizable potential impact for the team.
• Is able to contribute actively to high impact chaos mitigation.

Identifies and advocate for prioritization of tasks that can optimize delivery Backend focus (senior):

• 5+ years backend development experience
• Strong system design skills
• Experience with microservices, distributed systems
• Deep understanding of data architecture and APIs
• Experience with performance optimization and scalability

Frontend capabilities (experienced):

• Experience with modern JavaScript frameworks
• Can independently build frontend features
• Understanding of state management, routing, API integration
• Considers performance, accessibility, and UX in implementations

Fullstack mindset

• End-to-end product thinking
• Curiosity about the full stack
• Strong collaboration and communication skills
• Ability to navigate ambiguity across technical domains

Recruitment process

• HR screening - (45 min)
• Coding & Testing module - Backend (60 min)
• System design feature (60 min)
• Data module (45 min)
• Tech leadership + Meet your manager (75 min)
• BM Values (45 min)

Why Should You Join Us?

At Back Market, we're committed to hiring and supporting diverse teams of people from all backgrounds, experiences, and perspectives — it's one of the reasons we're such a high-scoring certified B Corp company (93.2).

No matter your role and seniority level, you'll enjoy impact-driven work with hands-on career development in an innovative, driven, and fast-paced environment — with benefits to match, like:

- A mission driven work environment where your day to day makes an impact on the planet.

- Hybrid work environment, with 2 remote days a week and 1 remote work week per quarter, plus 3 flex days.

- Employee Resource Groups, including mentorship programs, comprehensive accessibility policies, and cultural competency training.

At Back Market, we strive to create a workplace that embodies the world we're trying to change. We've embedded our diversity, equity, and inclusion principles into our DNA — from dedicated staff to employee resource groups to our company values.

We know that the perfect background for a role doesn't mean the perfect fit — we encourage you to apply for a role even if you think you may not have all the qualifications.

If reasonable accommodations are needed for the interview process, please do not hesitate to discuss this with the Talent Acquisition Team.