Senior Full Stack Engineer

Zinc; Greater London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A fast-growing HRTech startup is seeking a Senior Full Stack Engineer to shape the technical direction of their platform. You will build high-quality features, work with cross-functional teams to understand customer problems, and lead technical challenges. The ideal candidate has advanced skills in Node.js, TypeScript, and cloud services. They offer flexible work arrangements and competitive benefits, enhancing employee well-being and satisfaction.

Benefits

24 days holiday + Bank Holidays + birthday off

£1200 annual benefits allowance

Early finish Fridays

Yearly company retreat abroad

30 days to work from anywhere

Enhanced Maternity, Paternity, and Adoption Leave

Statutory pension with NEST

Zinc shares through EMI Scheme

Unlimited access to MoreHappi coaching

Company and team socials

Nursery workplace benefit scheme

Option to lease an electric car

Qualifications

• Advanced skills with Node.js and modern frontend frameworks like Vue or React.
• Deep expertise delivering production-grade applications using modern JS/TS best practices.
• Proven ability to create scalable, maintainable, and high-performance systems.

Responsibilities

• Design and deliver high-impact solutions that are clean, scalable, and built to last.
• Work with Product, Design, and customers to define what to build and how to build it.
• Maintain, optimise, and secure systems for best performance.

Skills

Full Stack Development

TypeScript & JavaScript Mastery

System Design & Architecture

Database & Cloud

DevOps & CI / CD

Testing & Quality Assurance

Highly Collaborative

Product-Minded

Clear Communicator

Kind & Supportive

Job description

Description

We are expanding our engineering team to boost our development capacity and take our product to the next level. As a Senior Full Stack Engineer, you’ll play a central role in shaping the technical direction of our platform, building high-quality features, influencing system architecture, and ensuring we deliver a product that’s efficient, robust, and a delight for thousands of customers to use.

You’ll work closely with Product, Design, and customers to deeply understand problems, translate them into elegant technical solutions, and help decide not only what we build but how we build it for long-term success.

Key Responsibilities

• Building powerful features – Design and deliver high-impact solutions that are clean, scalable, and built to last, delighting thousands of customers.
• Shaping the big picture – Work with Product, Design, and customers to define what we build and how we build it for long-term success.
• 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 technical challenges, turning complex problems into elegant, maintainable solutions.
• Mentoring and leading – Support and guide other engineers, sharing knowledge and raising the technical bar for the team.
• 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 detail delivers value to users.

Skills, Knowledge and Expertise

Hard skills

• Full Stack Development – Advanced skills with Node.js (Express / Nest.js) and modern frontend frameworks like Vue / Nuxt or React / Next, building smooth, scalable experiences end-to-end.
• TypeScript & JavaScript Mastery – Deep, hands-on expertise delivering production-grade applications using modern JS / TS best practices.
• System Design & Architecture – Proven ability to create scalable, maintainable, and high-performance systems that stand the test of time.
• Database & Cloud – Strong experience with MongoDB and AWS services (Lambda, S3, API Gateway) for robust, cloud-native solutions.
• DevOps & CI / CD – Skilled at creating and managing pipelines, automated deployments, and infrastructure-as-code to keep things shipping smoothly.
• Testing & Quality Assurance – Proficient with tools like Jest and Cypress to ensure quality, reliability, and confidence in every release.
• Highly Collaborative – Thrives in cross-functional teams, working closely with engineers, designers, and product to deliver exceptional results.
• Product-Minded – Always focused on customer impact, thinking beyond code to how features improve the user experience and meet business goals.
• Clear Communicator – Able to explain technical decisions simply, provide constructive feedback, and make complex ideas accessible to all stakeholders.
• Kind & Supportive – Builds a positive, respectful team culture, lifting others up and working with humility and empathy.

What we offer

Zinc offers a chance to work on a product that brings a fresh perspective on data ownership in hiring

• 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 (2 months full pay, then statutory)
• Statutory pension with NEST (3% employer, 5% employee)
• Zinc shares, issued through the EMI Scheme
• Unlimited access to MoreHappi coaching
• 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 🥳

Who we are

Zinc builds automated reference and background checking tools designed to improve candidate experience and set new industry standards. Founded in 2017 by a team with extensive HRTech experience, Zinc is an early-stage startup rapidly growing as it redefines efficiency, transparency, and fairness in background checks.

Read more about our story here: https://zincwork.com/mission

We’re a culture first company. By this we don’t just mean an active calendar of both company and team organised events (which we do have), Zinc’s culture is defined by a respectful and autonomous approach to all employees, fostering support for new ideas, promoting a flexible work environment, and operating within a flat structure. While socials, lunches, and events enhance the experience, the core of Zinc’s culture drives employees to embrace innovation, share successes, and feel motivated about the company’s future.

We recently redefined our company values :

The pieces that make Zinc: Pragmatic, Integrity, Empathy, Collaborate, Empowered, Speed.