Full Stack Engineer

ResponsibilitiesLead and mentor a small engineering teamArchitect and build scalable integrations across the e-commerce ecosystemDevelop new features and infrastructure using Node.js, React, JavaScript, GCPOwn and contribute to the technical roadmapMaintain high code quality, performance, and reliabilityCommunicate effectively with both technical and non-technical stakeholdersImplement data optimisation strategiesApply AI/ML technologies where relevantTroubleshoot and resolve issues across systems and integrationsImprove and participate in agile development practicesConduct code reviews and mentor junior engineers

Skills & QualificationsDegree in Computer Science, Engineering, or similar7+ years full-stack experience with Node.js, React, JavaScriptExperience integrating e-commerce platforms (e.g., Shopify)Experience leading or mentoring engineersStrong understanding of Agile and DevOps practicesExcellent problem-solving and communication skillsExperience with AI/ML (image recognition, automation, pricing) is a plusFamiliarity with cloud platforms, microservices, and modern architectureProactive, solution-oriented mindset with a passion for innovation

• Work Location: United Kingdom only (London preference)* Timezone: UTC (London) ± 2 hours* Working Pattern: Hybrid (up to 3 days remote per week)* Visa Sponsorship: Not available Compensation - What You Get

• £60-90k (based on experience)* Hybrid working with access to our London office* 33 days paid holiday* Top-of-the-range laptop* Pension scheme* Company away days and regular team socials Interview Process

1. Application and short cover note2. Technical test3. Interview with the engineering team4. Founder interview5. Offer

About Birl Launched in 2024, Birl has quickly become one of the UK's most exciting circular commerce startups, redefining how resale and recycling can drive growth rather than cost. Birl's plug-and-play platform integrates directly into a brand's e-commerce site or in-store system, enabling customers to trade in pre-loved products for instant store credit. Birl manages the full process - AI verification, logistics, resale, and recycling - giving brands a no-touch circular solution that builds loyalty, generates new revenue, and delivers measurable ESG impact. Already live with over 10 premium fashion brands including Frahm Jackets, SIRPLUS, and Far Afield, Birl has expanded into sport through partnerships with Castore, Fanatics and West Ham United. These collaborations show that circular retail can scale commercially across multiple sectors. Backed by Innovate UK and early-stage VCs, and Winner of this year's UK eCommerce Innovation Award (October 2025), Birl's vision is to build the technology backbone for a world where every product has more than one life - making circular retail effortless, measurable, and commercially viable. Position SummaryThe Senior Software Engineer will play a central role in building Birl's platform and leading our engineering capability. E-commerce experience is essential, with premium fashion and logistics experience highly desirable. This role combines full-stack development (Node.js, React, JavaScript) with mentoring and guiding a small engineering team. Ideal candidates will have experience building scalable e-commerce systems, integrating third-party platforms (e.g., Shopify), and applying AI/ML to enhance performance and automation.