At a Glance
- Tasks: Architect and scale backend systems for a revolutionary AI-native fashion marketplace.
- Company: Joinfleek.com, a fast-growing fashion-tech startup backed by top investors.
- Benefits: Competitive salary, impactful work, and opportunities for professional growth.
- Other info: Be part of a dynamic 100-person team with excellent career advancement potential.
- Why this job: Join a mission-driven team transforming the fashion industry and saving garments from landfills.
- Qualifications: 3-6 years of backend experience with Node.js and TypeScript in high-traffic environments.
The predicted salary is between 36000 - 60000 £ per year.
You will architect the transaction layer for the world's first AI-native secondhand fashion marketplace. Reporting to the CTO, you will build scalable systems handling 500k+ items monthly, integrating proprietary computer vision models into core ecommerce flows. This is a high-impact role digitizing a $350B industry while diverting millions of garments from landfills.
Location: London, UK
Why this role is remarkable:
- Join a hyper-growth Series B startup that has raised ~$50M from top-tier investors including a16z, Y Combinator, and HV Capital.
- Work on FleekSort, a proprietary AI model that is fundamentally transforming global supply chains by automating the grading and pricing of unique items at scale.
- Massive environmental impact: the platform has already saved 9 million items from landfills and is tripling in size year-on-year.
What you will do:
- Design and scale backend systems for item discovery, search, and complex multi-continent payment and credit workflows.
- Architect the integration between FleekSort's AI classification engine and the live marketplace to enable real-time inventory structuring.
- Lead technical direction within a senior squad, mentoring junior engineers and defining engineering standards for a rapidly growing 100-person team.
The ideal candidate:
- 3-6 years of backend experience with Node.js and TypeScript, specifically building high-traffic consumer marketplaces or fintech products.
- Proven ability to design complex system architectures and data models from scratch while navigating the ambiguity of a fast-paced startup.
- Product-minded engineer who prioritises commercial outcomes and user experience over pure technical perfection, ideally with interest in AI deployment.
Next steps:
- Visit our website.
- Click 'Talk to Jack'.
- Talk to Jack so he can understand your experience and ambitions. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
- If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction. If not, Jack will find you excellent alternatives. All for free.
Senior Backend Software Engineer at Joinfleek.com employer: Jack and Jill AI
Joinfleek.com is an exceptional employer, offering a dynamic work environment in the heart of London where innovation meets sustainability. As a Series B startup backed by top-tier investors, employees have the unique opportunity to contribute to a transformative platform that is digitising the secondhand fashion industry while making a significant environmental impact. With a strong focus on employee growth, mentorship, and collaboration within a rapidly expanding team, Joinfleek.com fosters a culture of creativity and purpose, making it an ideal place for passionate individuals looking to make a difference.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Backend Software Engineer at Joinfleek.com
✨Tip Number 1
Get to know Jack! He’s your go-to AI for understanding what you bring to the table and what you want from your career. A quick chat with him can help tailor your approach and make sure you’re on the right track.
✨Tip Number 2
Don’t just apply anywhere; apply through our website! It’s the best way to ensure that Jill, our AI Recruiter, sees your application and considers you for the role. Plus, it’s super easy!
✨Tip Number 3
Prepare for a chat with Jill! She’s looking for candidates who fit the bill, so brush up on your backend experience and be ready to discuss how you can contribute to Joinfleek.com’s mission.
✨Tip Number 4
Stay flexible and open-minded! If Jill doesn’t think you’re the perfect match for this role, Jack will help you find other fantastic opportunities. Keep the conversation going and explore all your options!
We think you need these skills to ace Senior Backend Software Engineer at Joinfleek.com
Some tips for your application 🫡
Show Off Your Skills:Make sure to highlight your backend experience with Node.js and TypeScript. We want to see how you've tackled high-traffic consumer marketplaces or fintech products, so don’t hold back on the details!
Tailor Your Application:Customise your application to reflect the role at Joinfleek.com. Mention your interest in AI deployment and how you can contribute to digitising the fashion industry. We love seeing candidates who align with our mission!
Be Clear and Concise:Keep your application straightforward and to the point. We appreciate clarity, so make sure your experience and achievements shine through without unnecessary fluff.
Apply Through Our Website:Don’t forget to apply through our website! Click 'Talk to Jack' to get started. This way, we can ensure your application gets the attention it deserves and you’re considered for this exciting opportunity.
How to prepare for a job interview at Jack and Jill AI
✨Know Your Tech Stack
Make sure you’re well-versed in Node.js and TypeScript, as these are crucial for the role. Brush up on your experience with high-traffic consumer marketplaces or fintech products, and be ready to discuss specific projects where you’ve designed complex system architectures.
✨Showcase Your Problem-Solving Skills
Prepare to talk about how you've navigated ambiguity in fast-paced environments. Think of examples where you’ve tackled challenges head-on, especially those related to backend systems and integrating AI models into workflows.
✨Emphasise Your Product Mindset
This role values a product-minded engineer, so be ready to discuss how you prioritise commercial outcomes and user experience. Share instances where your technical decisions positively impacted users or business goals.
✨Ask Insightful Questions
Prepare thoughtful questions about Joinfleek.com’s vision, especially regarding their AI-native marketplace and environmental impact. This shows your genuine interest in the company and helps you assess if it’s the right fit for you.
