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- Tasks: Design and build secure APIs for card data, collaborating with enterprise customers.
- Company: Sequoia-backed startup revolutionising payments infrastructure.
- Benefits: Competitive salary, equity options, and a vibrant engineering culture.
- Other info: Join a fast-growing team in a dynamic Shoreditch environment.
- Why this job: Make a direct impact on payment security for global transactions.
- Qualifications: 3-10+ years in product engineering with a focus on API design.
The predicted salary is between 70000 - 140000 £ per year.
Join a high-caliber team of 25 building the encryption infrastructure used by Ramp, Rippling, and Sorare. As a Product Engineer on the Cards team, you will own the full lifecycle of payment primitives, from designing APIs to shipping production code that secures billions in annual transaction volume across global card networks.
Benefits:
- Work at a Tier‑1 VC‑backed startup (Sequoia, Index, Kleiner Perkins) that recently closed a $25M Series B and is scaling 4x year‑over‑year.
- Direct impact on core infrastructure: you shape the future of how card data is tokenized and processed at scale.
- Exceptional engineering culture with a high bar for craft, working primarily with Rust and TypeScript in a hybrid Shoreditch-based team.
Responsibilities:
- Design and build developer‑facing APIs and primitives for card data security, tokenization, and network integrations.
- Collaborate directly with enterprise customers to understand their payment stacks and translate complex security needs into production code.
- Own features end‑to‑end across the full stack, including backend services, SDKs, UI components, and technical documentation.
Qualifications:
- 3‑10+ years of experience in product engineering with strong fundamentals in distributed systems, networks, and infrastructure.
- Proven ability to ship high‑quality developer tools or infrastructure products with a relentless focus on API design and user experience.
- Deep curiosity and a bias for action; prior experience in payments domain (3DS, card networks, or compliance) is a significant advantage.
Product Engineer — Cards (£70k-£140k + Equity) at Sequoia-backed payments infrastructure startup employer: Jack & Jill
Contact Detail:
Jack & Jill Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Product Engineer — Cards (£70k-£140k + Equity) at Sequoia-backed payments infrastructure startup
✨Tip Number 1
Network like a pro! Reach out to folks in the payments industry, especially those who work at startups. Use LinkedIn or even Twitter to connect and chat about their experiences. You never know when a casual conversation might lead to a job opportunity!
✨Tip Number 2
Show off your skills! Create a portfolio that highlights your best projects, especially those related to APIs and payment systems. When you apply through our website, include links to your work so potential employers can see what you're capable of.
✨Tip Number 3
Prepare for technical interviews by brushing up on your coding skills, particularly in Rust and TypeScript. Practice common algorithms and system design questions, and don't forget to review payment security concepts. We want you to feel confident when it’s time to shine!
✨Tip Number 4
Follow up after interviews! A quick thank-you email can go a long way in leaving a positive impression. Mention something specific from your conversation to show you were engaged and are genuinely interested in the role. It’s all about making that connection!
We think you need these skills to ace Product Engineer — Cards (£70k-£140k + Equity) at Sequoia-backed payments infrastructure startup
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that align with the Product Engineer role. Highlight your experience in distributed systems and API design, as these are key for us.
Craft a Compelling Cover Letter: Use your cover letter to tell us why you're passionate about payments infrastructure. Share specific examples of your work that demonstrate your ability to ship high-quality developer tools.
Showcase Your Projects: If you've worked on relevant projects, whether personal or professional, make sure to include them. We love seeing how you've tackled challenges in the payments domain or built APIs.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss out on any updates from our team!
How to prepare for a job interview at Jack & Jill
✨Know Your Tech Stack
Make sure you’re well-versed in Rust and TypeScript, as these are key to the role. Brush up on your knowledge of distributed systems and payment infrastructures, especially if you have experience with card networks or compliance.
✨Understand the Company’s Impact
Research the startup's recent funding rounds and their growth trajectory. Knowing how they fit into the payments landscape will help you articulate how you can contribute to their mission and goals.
✨Prepare for Technical Questions
Expect to dive deep into API design and user experience. Be ready to discuss past projects where you’ve built developer-facing tools, and think about how you can demonstrate your problem-solving skills in real-time.
✨Show Your Curiosity
This role values a deep curiosity and a bias for action. Prepare questions that show your interest in their technology and processes, and be ready to discuss how you stay updated on industry trends and innovations.