Experienced Software Engineer - PayIn

As an experienced software engineer on our Payin team, you'll be at the heart of Back Market's payment ecosystem. You'll craft secure, seamless payment experiences that enable millions of customers worldwide to purchase refurbished devices with confidence. The Payin team owns the complete payment journey - from checkout optimization to fraud prevention, from new payment method integrations to PCI DSS compliance. We're tackling exciting challenges like implementing one-click payments, launching new payment methods across different markets, and building next-generation payment forms that guide users effortlessly through their purchase. What You Will Do, We look for versatile engineers who show strong ownership, are motivated to take on new challenges across the technical stack, and help us move our technology forward. You'll work in an agile "build it and run it" environment where engineering teams build, launch, monitor and support the product that they own. You'll craft outstanding products, deliver seamless user experiences at scale, and produce clean, consistent and well-organised code 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 in locations across the US, FR, ES, JP. Payment Experience Innovation

• Build and optimize payment forms that improve conversion rates across web and mobile
• Integrate new payment methods like Klarna, PayPal, and Open Banking solutions
• Develop one-click payment features for returning customers
• Create responsive payment flows that work seamlessly across devices

Security & Compliance

• Implement PCI DSS compliant payment interfaces
• Build isolated payment applications to reduce security scope
• Develop secure tokenization and fraud prevention features
• Create automated systems for chargeback management

Technical Excellence

• Contribute to our design system and component library
• Build comprehensive testing suites (unit, integration, e2e)
• Implement monitoring and alerting for payment systems
• Optimize performance for high-traffic payment flows

Backend: Python - FastAPI, SQLAlchemy, Celery; Golang, Django (being phased out) Frontend: Vue.js, TypeScript, Nuxt, Revolve (our design system) Data: PostgreSQL, Redis, Kafka, RabbitMQ, BigQuery Infrastructure: GCP, Kubernetes, Docker, Datadog, ArgoCD, CircleCI, GitHub Our payment systems integrate with Adyen, Signifyd, and various payment providers across global markets. Our Technical Skills & What We're Looking For

• 2+ years of engineering experience
• Full-stack engineer enthusiastic about working across the entire stack
• Experience with TypeScript and Python in a cross-platform environment
• Understanding of payment systems and security best practices
• Familiarity with testing frameworks and methodologies

Mindset & Approach

• Code quality is your priority - you follow best practices religiously
• Testing isn't optional; you embrace Clean Code, TDD, BDD principles
• Curious, proactive, and take ownership of your work
• Comfortable working both independently and collaboratively
• You can anticipate how interfaces need to evolve with business strategy

Bonus Points

• Experience with payment integrations and PCI DSS compliance
• Experience with monitoring tools and performance optimization
• Knowledge of accessibility standards
• Familiarity with fraud prevention systems

Seniority Expectations

• Works autonomously on development tasks within the team's application or service
• Delivers high-quality code on time
• Demonstrates professional collaboration with teammates and peers
• Operates autonomously within the squad's technical scope

Recruitment Process

• First discussion with one of our tech recruiters (45 min to 1 h)
• Backend technical modules with 2 backend engineers
• Coding and testing (1 h)
• System design & APIs (45 min)
• Feature kickoff exercise with two front-end engineers (60 min)
• Tech leadership discussion with BoT team members (45 min)
• Team fit with your future manager (30 min)
• Back Market values interview with C-level (45 min)

• A mission-driven work environment where your day-to-day makes an impact on the planet.
• Hybrid work environment: 2 remote days a week, 1 remote work week per quarter, plus 3 flex days.
• Employee Resource Groups, mentorship programs, comprehensive accessibility policies, and cultural competency training.

Hi, we're Back Market. 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. We're committed to doing more with what we already have, and every device purchased on Back Market grows our positive impact on the planet.