Build, scale, and maintain production integrations with ATS and HRIS platforms. Design partner APIs, webhooks, reusable connector layers, data mappings, testing frameworks, observability tools, and integration support tooling. Harden existing integrations through improved retries, error handling, idempotency, and migration from deprecated mechanisms. Collaborate with Product and Partnerships, provide technical feasibility input, review code, and occasionally contribute to Vue/Nuxt settings screens.
Zinc is growing its Integrations team. Integrations with ATS and HRIS platforms such as Workday, Greenhouse, iCIMS, Lever and SmartRecruiters are one of our biggest levers for growth, and demand from Partnerships and Sales is outpacing what our current team can build. As an Integrations Engineer, you'll add the engineering capacity to change that. 🚀
Your job is to increase the number and quality of Zinc's integrations. You'll design, build and scale connections with third-party platforms, and evolve our Partner API so partners can build on Zinc with less hand-holding.
This is an engineering role. Support and onboarding sit with our dedicated Integration Support function in Partnerships, so your time goes on building, hardening and improving integrations. You'll also be the escalation point for issues support can't resolve. You'll work closely with Product, Partnerships and Integration Support, and report to the Engineering Manager for Integrations.
Key Responsibilities 🗝️
- Building integrations end to end 🔌 – Read partner API docs, spec with the PM, then build, test and release new integrations, from Greenhouse Harvest API upgrades to CV checks across ATSs.
- Hardening what's live 🛡️ – Move existing integrations off deprecated mechanisms (such as Greenhouse polling to PATCH) and strengthen error handling, retries and idempotency.
- Evolving the Partner API 🧩 – Own endpoint design, versioning, webhooks, docs and sandbox so partners can build on Zinc with less hand-holding.
- Building reusable patterns ♻️ – Create shared connector and mapping layers that cut the cost of every new integration.
- Giving support the tools 🔭 – Build internal tooling and observability so Integration Support can diagnose issues themselves.
- Being the escalation point 🚨 – Root-cause and fix the issues Integration Support can't resolve. You're not the first line for customers.
- Shaping what we build 🎯 – Give Product and Partnerships technical feasibility input during discovery, through the team's planning process.
- Raising the bar 🤝 – Review code, set testing standards, and pick up occasional Vue/Nuxt work on integration settings screens.
Skills, Knowledge and Expertise 🚀
Hard skills ⚡
- Integration Engineering 🔌 – You've built and maintained production integrations against third-party APIs you don't control, in code rather than config. You know the trade-offs: sync vs async, webhooks vs polling, retry strategies.
- TypeScript / Node.js 💻 – Production experience. Our backend is TypeScript and we standardise across the codebase.
- REST APIs & Webhooks 🔗 – OAuth2, pagination, rate limits, retries and idempotency are second nature. They're core to every integration.
- Data Mapping 🗺️ – You're comfortable moving data between JSON, XML and SOAP. Workday and iCIMS are XML/SOAP-heavy.
- Testing 🧪 – You're proficient with Jest and with contract and integration tests using mocks, because integrations fail silently.
What we offer 🍉
- 24 days holiday + Bank Holidays + your birthday off 🎉
- £1200 annual benefits allowance (ThanksBen, from month 2)
- Early finish Fridays (16:00)
- Yearly company retreat abroad ✈️
- 30 days to Work from anywhere 🌍
- Enhanced Maternity, Paternity, and Adoption Leave (13 weeks full pay, 17 weeks half pay, then SMP for maternity, 2 months full pay, then statutory pay for paternity/adoption) 🐣
- Statutory pension with NEST (3% employer, 5% employee)
- Zinc shares, issued through the EMI Scheme
- Unlimited access to Spill Therapy
- Company socials, quarterly team socials Free Monday lunches
- Nursery workplace benefit scheme (Yellownest)
- Option to lease an electric car through Electric Car Scheme
- Celebrated Zinc anniversaries 🥳
About
Who are Zinc? ⚡️We believe in better background checking: making them easy, instant and delightful - for candidates and HR teams across the world 🌎. Founded in 2017, we've grown year-on-year, reaching the Times Top 100 fastest growing businesses, the Deloitte EMEA fast 500 and winning the 2026 HSBC x WIRED Award in the Trailblazers Category.But we're not all work, our founders Luke and Charlotte are hot on being a culture first business. By this, we don't just mean an active calendar of company and team events (although these are great! 🍻 🥂🍕🎯) - our culture is defined by respect, fostering support for new ideas, promoting flexible work environments and operating with autonomy and low ego. 🔥💥❤️It's not just us who think they've done a stellar job - we've won awards for being a Top Place To Work in 2025 and 2026 from Tembo and SeedLegals 💚What are our values? 🧩🧩🧩Our values are: Pragmatism, Integrity, Empathy, Collaboration, Empowerment and Speed. We call them the PIECES that make Zinc (see what we did there 😂).How do we work? 🧑🏽💻👩🏼💻👨🏿💻We operate on a hybrid working model, with everyone coming to our Shoreditch Offices on Mondays and Thursdays, and working from home on the others. We believe this is a great balance between having space for deep work and in-person collaboration ⚡️⚡️⚡️
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