Senior Fullstack Developer

Xact Placements; Remote; GBP 60,000 - 80,000; Full time

Job summary

A cybersecurity scale-up is seeking a Senior Full Stack Engineer to design and develop enterprise-grade SaaS features. This role involves building secure, scalable APIs using NestJS, GraphQL, and creating engaging UIs with React and Next.js. Candidates should have 5+ years’ experience in building SaaS products, strong backend skills, and thrive in a high-growth environment. This position offers competitive compensation and growth opportunities in a dynamic team focused on cybersecurity innovation.

Benefits

Competitive compensation & benefits

Endless growth opportunities

Cutting-edge tools and kit

Qualifications

• 5+ years’ experience building enterprise SaaS products.
• Strong backend development experience.
• Proficiency in frontend technologies.

Responsibilities

• Designing and developing SaaS features.
• Building secure, scalable APIs and services.
• Creating data-driven dashboards and UIs.

Skills

Backend development with TypeScript

NestJS

GraphQL

ReactJS

NextJS

Typescript

Chakra UI

MySQL

NoSQL databases

Kafka

Debugging

Troubleshooting

Optimisation

Figma

Tools

AWS

Kubernetes

Xstate

Argo Workflows

Job description

Senior Full Stack Engineer | Cybersecurity Scale-Up | Fully Remote (Global)

Want to use your full stack skills to help stop real-world cyber attacks? This is your chance to join a fast-growing, VC-backed cybersecurity innovator, recognised by Gartner and trusted by Fortune 500s and critical infrastructure providers worldwide.

They’re building cutting‑edge technology that helps organisations continuously understand how they could be compromised — and they’re scaling fast.

Now, they’re looking for a Senior Full Stack Engineer to join their Client Facing Applications (CFA) team, where you’ll help shape the customer experience for some of the world’s largest enterprises.

What you’ll be doing:

• Designing and developing enterprise‑grade SaaS features across backend and frontend systems
• Building secure, scalable, and high‑performing APIs and services (NestJS, GraphQL, REST)
• Creating data‑driven dashboards and UIs with React, Next.js, and Chakra UI
• Translating product and design requirements into elegant, maintainable solutions
• Troubleshooting and optimising performance across the full stack
• Collaborating with product managers, designers, and engineers to deliver seamless client experiences
• Driving continuous improvements in engineering practices, tooling, and processes

What they’re looking for:

• 5+ years’ experience building enterprise SaaS products (ideally in cybersecurity or data‑heavy environments)
• Strong backend development with TypeScript, NestJS, Sequelize ORM, GraphQL, REST APIs
• Frontend expertise with ReactJS, NextJS, Typescript, Chakra UI
• Experience with MySQL and NoSQL databases
• Familiarity with messaging / event‑driven systems (Kafka)
• Ability to work closely with designers (Figma) and translate complex business logic into intuitive UI / UX
• Problem‑solver with strong debugging, troubleshooting, and optimisation skills
• Thrives in high‑growth startup / scale‑up environments, with adaptability and ownership mindset

Bonus points if you have:

• AWS or Kubernetes experience
• Workflow engine knowledge (Xstate, Argo Workflows)
• Broader understanding of networking and infrastructure

Why join?

✅ Competitive compensation & benefits

✅ A key role in a high‑growth cybersecurity scale‑up solving global challenges

✅ Cutting‑edge tools and kit to help you succeed

✅ Endless growth opportunities — internal promotion is core to their culture

✅ Collaborate with cybersecurity experts and work on problems that really matter

This isn’t just another engineering role. It’s your chance to build technology that protects enterprises from real‑world attacks while shaping the future of offensive security at scale.

Interested? Apply now — this one won’t stay open for long.