Senior Integrations Engineer
Department: Tech – Engineering
Employment Type: Full Time
Location: Zinc – London
Compensation: £80,000 – £85,000 / year
Description
We are expanding our engineering team to boost our development capacity and take our product to the next level. As a Senior Integrations Engineer, you’ll play a central role in how Zinc connects with the wider hiring and background-check ecosystem, building robust APIs and partner integrations that let customers get value from Zinc’s data across their own tools. This includes our own partner API as well as custom integrations with HR tech platforms such as applicant tracking systems (ATS) and HR Information Systems (HRIS).
You’ll work closely with Product, customers, and partner companies to understand integration needs, design secure and reliable APIs, and make sure the systems connecting Zinc to the outside world are built to last.
Key Responsibilities
- Building powerful integrations – Design and deliver high-impact, secure integrations with partner and customer systems that are clean, scalable, and built to last.
- Talking to customers – Work directly with customers and partners to understand their integration needs and translate them into solid technical solutions. Your time will be split 20% customer and 80% development.
- API design & development – Own the design, build, and documentation of APIs that are secure, well-structured, and easy for partners to consume.
- Keeping things running smoothly – Maintain, optimise, and secure our systems so they perform at their best, even at scale.
- Problem-solving like a pro – Lead the charge on tricky integration challenges, turning complex problems into elegant, maintainable solutions.
- Staying ahead of the game – Keep up with new tools, trends, and best practices, helping us continuously evolve our stack and processes.
- Owning your work end-to-end – Take full responsibility from initial idea to production, making sure every integration delivers value to customers.
Hard skills
- Backend Development – Advanced skills with Node.js (Express), building robust, scalable backend services. Comfortable picking up light frontend work (Vue/Nuxt) when needed.
- API Design & Security – Strong hands-on experience designing RESTful APIs and a solid grasp of API security practices (auth, rate limiting, data protection).
- System Design & Architecture – Proven ability to create scalable, maintainable, and high-performance systems, particularly across integration and partner-facing architecture.
- TypeScript & JavaScript Expertise – Deep, hands-on expertise delivering production-grade applications using modern JS/TS best practices.
- Database & Cloud – Strong experience with databases and AWS services (Lambda, S3, API Gateway) for robust, cloud-native solutions. NoSQL experience (e.g. MongoDB) a bonus.
- Testing & Quality Assurance – Proficient with tools like Jest to ensure quality, reliability, and confidence in every release.
Customer‑Facing
- Leading conversations – Comfortable leading conversations with customers and partners about technical integration needs.
- Highly collaborative – Thrives in cross-functional teams, working closely with engineers, product, and external partners.
- Clear communicator – Able to explain technical decisions simply to both technical and non-technical stakeholders.
- Kind & supportive – Builds a positive, respectful team culture. Mentorship experience is a bonus.
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, 1 month full 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
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