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Software Engineer, Backend Developer, Full Stack Developer

Job in Cardiff, Cardiff City Area, CF10, Wales, UK
Listing for: Legatics
Full Time position
Listed on 2026-07-18
Job specializations:
  • Software Development
    Backend Developer, Software Engineer, Full Stack Developer
Job Description & How to Apply Below

About Legatics

Legatics is one of the world’s leading Legal Tech scale-ups. We put users at the heart of our design to provide legal transaction experiences that everybody loves, and we’re on a mission to transform the market for legal services worldwide.

Legatics is a transaction management platform that streamlines the way lawyers collaborate and close deals, transforming traditional paper and email based processes into simple, highly automated software that frees lawyers from administrative tasks and improves profitability. Our customers include some of the world’s top law firms, and Legatics has been used on live transactions originating in more than 20 countries.

The role

We are looking for a Software Engineer who thinks in systems and outcomes, not just code. As AI-assisted development becomes core to how we build, the most valuable engineers are those who deeply understand the problem they are solving and can direct powerful tools to solve it well. You will sit at the intersection of product and engineering: shaping what we build, understanding how the pieces fit together, and using modern AI tooling to ship high-quality work quickly.

We care more about whether you understand what needs solving and can verify it’s been solved well, rather than about years spent writing code by hand.

This is not a role for someone who only wants tightly scoped tickets. It is for someone who wants to understand the “why”, challenge assumptions, and take ownership of outcomes.

What you’d be doing

  • Build, ship and maintain features across our platform, owning problems from understanding through to delivery.
  • Work closely with product and customers to translate real user and commercial needs into well-designed technical solutions.
  • Direct AI tools (such as Claude Code) to work efficiently, while applying your own judgement to verify, refine and stand behind everything that ships.
  • Reason about how systems fit together: data flows, integrations, edge cases and the downstream impact of changes.
  • Contribute to technical decisions, code quality and the guardrails that let us move fast safely.
  • Collaborate with engineers who set architectural direction, and grow your own influence over time.
Requirements

What we need from you

  • Strong problem framing and communication: you can articulate what needs solving and why, not just how.
  • Solid, demonstrable software engineering foundations: you can read an unfamiliar codebase, reason about architecture, and write maintainable, well-tested code.
  • A genuinely product-focused, systems-thinking mindset: you care about user outcomes and you naturally see how moving parts connect.
  • Sound judgement when working with AI tooling: able to direct, review and correct AI-generated output rather than accept it uncritically.
  • Comfortable with ambiguity and ownership in a small, fast-moving team.
  • UK-based and able to travel to our London office roughly twice a month.

Technical experience

Required

  • Type Script: strong, production-grade experience.
  • Node.js with modern ESM modules.
  • React 18+ with functional components and hooks.
  • MongoDB, including aggregation pipelines.
  • GraphQL: schema design and resolver authoring.

Preferred

  • Apollo Client (v3/v4): fragments, caching, optimistic updates.
  • pnpm, or npm/Yarn monorepo management.
  • Material UI or an equivalent component library / design system.
  • Integration testing against real data stores, not exclusively mocked.
  • Microservices architecture: building and consuming cross-service APIs.
  • Hands-on experience with AI-assisted or agentic coding tools (Claude Code, or similar).

Bonus points (not essential)

  • Exposure to B2B SaaS, regulated industries or Legal Tech.
  • Experience collaborating directly with Product and Customers.
Benefits

What we offer you

  • Competitive salary (depending on experience)
  • 25 days holiday per year (plus public holidays).
  • Early Finish Fridays - on the last Friday of every month, we finish at lunchtime!
  • Pension with NEST.
  • Personal Learning & Development budget.
  • Enhanced parental leave policies so you can spend more time with your family.
  • Lots of opportunities for accelerated professional development and career progression.
  • Work alongside a supportive and talented team with the opportunity to grow one of the world’s leading Legal Tech scale-ups.
  • A warm, genuinely collaborative culture and an awesome team; and
  • Regular socials.

Power in diversity

We put users at the heart of our design to provide legal transaction experiences that everyone loves. In order to make that a reality, we seek to foster a diverse and inclusive working environment that can empower our people to be creative, effective and innovative, to build a brand we are proud of.

We don’t discriminate against gender, race, religion or belief, disability, age, marital status or sexual orientation. Whatever your background may be, we welcome anyone with talent, drive and emotional intelligence. We’re committed to building a diverse team, and are constantly looking for ways to improve our processes to help us do that.

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