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For Companies At a Glance
- Tasks: Lead and mentor a small engineering team while building scalable e-commerce solutions.
- Company: Join Birl, a pioneering circular commerce startup transforming resale and recycling.
- Benefits: Earn £60-90k, enjoy hybrid work, 33 days holiday, and top tech gear.
- Why this job: Make a real impact in sustainable retail with cutting-edge technology and innovation.
- Qualifications: 7+ years full-stack experience with Node.js, React, and e-commerce integration.
- Other info: Dynamic team culture with excellent career growth and exciting projects.
The predicted salary is between 60000 - 90000 £ per year.
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
Full Stack Engineer in London employer: Birl
Contact Detail:
Birl Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Full Stack Engineer in London
✨Tip Number 1
Get your networking game on! Connect with folks in the industry, attend meetups, and join online communities. The more people you know, the better your chances of landing that dream job.
✨Tip Number 2
Show off your skills! Build a portfolio showcasing your projects, especially those related to e-commerce and full-stack development. This will give potential employers a taste of what you can do.
✨Tip Number 3
Prepare for interviews like a pro! Research Birl and their tech stack, and be ready to discuss how your experience aligns with their needs. Practice common technical questions and coding challenges.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, we love seeing candidates who are genuinely interested in joining our team at StudySmarter.
We think you need these skills to ace Full Stack Engineer in London
Some tips for your application 🫡
Craft a Catchy Cover Note: Your cover note is your first impression, so make it count! Keep it concise but engaging, highlighting your passion for e-commerce and how your skills align with our mission at Birl.
Showcase Your Experience: When detailing your experience, focus on your full-stack development skills and any relevant projects. We want to see how you've tackled challenges in e-commerce and what you can bring to our team.
Be Authentic: Don’t be afraid to let your personality shine through! We value authenticity, so share your journey and what excites you about the role and our vision for circular commerce.
Apply Through Our Website: Make sure to submit your application through our website. It’s the best way for us to keep track of your application and ensures you’re considered for this exciting opportunity!
How to prepare for a job interview at Birl
✨Know Your Tech Stack
Make sure you’re well-versed in Node.js, React, and JavaScript. Brush up on your full-stack development skills and be ready to discuss how you've used these technologies in past projects. Birl is looking for someone who can hit the ground running, so show them you’ve got the chops!
✨Showcase Your E-commerce Experience
Since Birl is all about e-commerce, prepare examples of your previous work in this area. Talk about any integrations you've done with platforms like Shopify and how you’ve tackled challenges in building scalable systems. This will demonstrate your relevance to their needs.
✨Be Ready to Mentor
As a Senior Software Engineer, you’ll be expected to lead and mentor a small team. Think of specific instances where you’ve guided junior engineers or improved team dynamics. Highlight your leadership style and how you can contribute to Birl’s engineering culture.
✨Communicate Clearly
Birl values effective communication with both technical and non-technical stakeholders. Practice explaining complex concepts in simple terms. During the interview, make sure to engage with your interviewers and ask questions that show your interest in their vision and processes.
