Integrations Engineer

Zinc; London Borough of Hackney; On-site; GBP 72,000 - 75,000; Full time

Benefits offered by this job

Holiday allowance

Birthday off

Benefits allowance

Early finish Fridays

Annual retreat abroad

Work from anywhere

Enhanced parental leave

NEST pension

Zinc EMI shares

Therapy access

Social events

Electric car scheme

Job summary

Zinc is growing its Integrations team. Integrations with ATS and HRIS platforms such as Workday, Greenhouse, iCIMS, Lever and SmartRecruiters are a major growth lever, 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. 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.

Qualifications

• Integration Engineering - you've built production integrations with third-party APIs, weighing sync vs async, webhooks vs polling, and retry strategies.
• TypeScript / Node.js - production experience; backend is TypeScript and standardized across codebase.
• REST APIs & Webhooks - OAuth2, pagination, rate limits, retries and idempotency.
• Data Mapping - moving data between JSON, XML and SOAP; Workday and iCIMS are XML/SOAP-heavy.
• Testing - proficient with Jest and contract/integration tests using mocks.

Responsibilities

• Building integrations end to end - read partner API docs, spec with PM, then build, test and release new integrations.
• Hardening what's live - move existing integrations off deprecated mechanisms and strengthen error handling.
• Evolving the Partner API - own endpoint design, versioning, webhooks, docs and sandbox.
• Building reusable patterns - create shared connector and mapping layers.
• Giving support the tools - build internal tooling and observability for faster diagnosis.
• Being the escalation point - root-cause and fix issues not resolved by Support.
• Shaping what we build - provide technical feasibility input during discovery.
• Raising the bar - review code, set testing standards, and occasional Vue/Nuxt work.

Skills

Integration Engineering

TypeScript / Node.js

REST APIs & Webhooks

Data Mapping

Testing

Tools

Jest

Job description

Integrations Engineer

Department: Tech - Engineering

Employment Type: Full Time

Location: Zinc - London

Reporting To: Lucila Sanjurjo

Compensation: £72,000 - £75,000 / year

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