Job Specifications
Senior Software Engineer (London, Full-Time)
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 Summary
The 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.
Responsibilities
Lead and mentor a small engineering team
Architect and build scalable integrations across the e-commerce ecosystem
Develop new features and infrastructure using Node.js, React, JavaScript, GCP
Own and contribute to the technical roadmap
Maintain high code quality, performance, and reliability
Communicate effectively with both technical and non-technical stakeholders
Implement data optimisation strategies
Apply AI/ML technologies where relevant
Troubleshoot and resolve issues across systems and integrations
Improve and participate in agile development practices
Conduct code reviews and mentor junior engineers
Skills & Qualifications
Degree in Computer Science, Engineering, or similar
7+ years full-stack experience with Node.js, React, JavaScript
Experience integrating e-commerce platforms (e.g., Shopify)
Experience leading or mentoring engineers
Strong understanding of Agile and DevOps practices
Excellent problem-solving and communication skills
Experience with AI/ML (image recognition, automation, pricing) is a plus
Familiarity with cloud platforms, microservices, and modern architecture
Proactive, solution-oriented mindset with a passion for innovation
Logistics
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
Application and short cover note
Technical test
Interview with the engineering team
Founder interview
Offer
#Jobster
About the Company
Employers, hiring managers, recruiters. Everyone has one thing on their mind. Finding talented people. But… everyone's looking in the same places. At the same time. In the same tiring way. Traditional job advertising always targets the same people. The ones that are actively looking for a new job. The only thing is; the best talent is often taken. But just because they're not searching for a new job, doesn't mean they're not looking for one. What if you knew who's eager to switch jobs before they start looking? Welcome to Jo...
Know more