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Experienced Frontend Engineer - Payin

Develop secure, user-friendly payment forms that increase transaction conversion rates
Barcelona
Senior
yesterday
Back Market

Back Market

An online marketplace specializing in refurbished electronics, offering a sustainable alternative to buying new devices.

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About The Role

As an experienced Frontend 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'll Work On

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

Technical Environment

Our platform runs on Vue.js/Nuxt with TypeScript, served through Node.js and Cloudflare. We deploy multiple times daily using CircleCI, with comprehensive testing via Vitest and Playwright. Our payment systems integrate with Adyen, Signifyd, and various payment providers across global markets.

Tech Stack: Vue.js, Nuxt, TypeScript, Node.js, Docker, Kubernetes, AWS, Tailwind CSS, Vitest, Playwright, Datadog

What We're Looking For

Technical Skills

  • Strong experience with Vue.js, React, or Angular
  • Deep knowledge of JavaScript, TypeScript, HTML5, and CSS
  • Experience with server-side rendering (Nuxt/Next.js)
  • 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 (Clean Code, TDD, BDD principles)
  • You're 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
  • Understanding of backend constraints and API design
  • Experience with monitoring tools and performance optimization
  • Knowledge of accessibility standards
  • Familiarity with fraud prevention systems

Recruitment Process

  1. First discussion with Yann, our Tech Talent Advisor - 45 min

  2. Technical screening with two Frontend engineers - 45 min

  3. Feature kickoff exercise with two Frontend Engineers - 60 min

  4. Tech leadership discussion with BoT team members - 45 min

  5. Team fit with your future manager - 30 min

  6. Back Market values interview with C-level - 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.

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Experienced Frontend Engineer - Payin
Barcelona
Engineering
About Back Market
An online marketplace specializing in refurbished electronics, offering a sustainable alternative to buying new devices.