Senior Fullstack Engineer (Rails, React)

About 8returns

Returns aren't just inconvenient, they're quietly eroding the profitability and sustainability of retail brands. At 8returns, we turn the costly chaos of e-commerce returns into streamlined, data-driven profit.

We've been trusted by some of the fastest-growing European DTC brands like OACE, PEGADOR, and GOT BAG, and are now ready to scale our proven solution to larger retail brands—with iconic brands such as Fielmann, Tommy Hilfiger, and FILA already leveraging our platform. This is where you step in.

About the Role

As a Senior Fullstack Engineer at 8returns, you’ll have a direct impact on reducing the environmental and financial burden of e-commerce returns. With ownership over key product areas, you’ll help us scale from a powerful niche player into a global platform. If you thrive in a dynamic, fast-moving setting and want to be part of a small team solving global challenges, 8returns is where you’ll make a real difference.

✨ About You (musts)

• You have 3+ years of experience shipping production web apps with Rails and React

  You’re a builder first you care more about delivering value than arguing about patterns

  You’re comfortable jumping between frontend, backend, APIs, and data models

  You’ve got strong product instincts, you think about UX, not just code

  You can handle ambiguity and tradeoffs without freaking out

  You’re proactive, opinionated, and fast - you don’t wait to be told what to do

  Would be a strong plus

  • Experience with Postgres, Heroku, AWS

    You’ve worked in early-stage SaaS or marketplace tools

    You’ve played with AI tools (ChatGPT, Claude, LangChain, etc.) and see them as part of your workflow

    Key Responsibilities

    • Ship new features end-to-end using Rails, React, and Postgres

      Improve performance, reliability, and developer experience across the stack

      Own parts of the product and drive technical decisions. We’re not big on layers of abstraction or committees

      Jump into support, bugs, or integration issues when needed - but always with the goal of building systems or tools that make them disappear

      Work closely with the founders and PM to prioritize ruthlessly and ship what matters

      Tinker with AI to find ways we can work faster, automate more, or build new things we couldn’t before

      Benefits at 8returns

      We’re async-first, low-meeting, high-ownership

      We value shipping fast over debating for weeks

      We run lean, stay profitable, and reinvest in product

      We care deeply about our merchants and solve real pain - not vanity metrics

      Hiring Process

      We believe great hiring is about mutual fit, not hoop-jumping. Our process is straightforward, focused, and respectful of your time—no take-home tasks, no unnecessary steps.

      Intro Call (20 min)

      Technical Deep Dive (45-60 min)

      Case Interview (60-90 min)—a collaborative session (not a test)

      Meet the Team (optional)

      Reference Checks (optional)

      Offer!

      If this sounds exciting, we’d love to talk to you!!