Frontend Software Engineer in London

Frontend Software Engineer in London

London Full-Time 49500 - 60500 £ / year (est.) Home office (partial)
TRG

At a Glance

  • Tasks: Build innovative software for climate solutions with engaging frontend challenges.
  • Company: Join a mission-driven climate-tech nonprofit in London.
  • Benefits: Hybrid work model, competitive salary, and impactful projects.
  • Other info: Collaborative team environment with opportunities for meaningful ownership.
  • Why this job: Make a real difference while tackling complex frontend engineering problems.
  • Qualifications: 3+ years of experience with React and TypeScript, strong frontend fundamentals.

The predicted salary is between 49500 - 60500 £ per year.

I’m working with a climate-tech nonprofit building software that helps governments, policymakers and energy planners make better decisions about the transition to cleaner electricity systems. This isn’t a standard frontend CRUD role. The frontend engineering problems are genuinely interesting. You’ll be building spreadsheet-like interfaces, interactive visualisations, filtering workflows and complex data-heavy features over datasets that can run into millions of rows — including input tables of around 5.1 million rows, well beyond what Excel can handle.

They’re now looking for a Frontend Software Engineer to join a small interface team working on a modern, greenfield React and TypeScript codebase. You’ll work closely with a Principal Frontend Engineer, Product, UX, backend engineers, AI engineers and energy specialists, with plenty of ownership over the features you build. The work can vary significantly sprint to sprint — from large data grids and visualisation to AI-powered product features.

  • Have 3+ years building production frontend applications with React and TypeScript
  • Have built complex, data-heavy interfaces involving tables, filtering, forms or visualisations
  • Understand frontend performance and how to work efficiently with large datasets
  • Have experience with client-side caching, synchronisation and invalidation — TanStack Query or similar
  • Have worked with frontend testing across unit, component, integration or E2E levels
  • Enjoy building reusable, accessible components and modern frontend architecture
  • Are comfortable working closely with Product, UX and backend teams
  • Enjoy solving difficult frontend problems rather than simply implementing standard screens

Experience with AG Grid, D3, AG Charts, TanStack Table/Virtual or Parquet would be particularly useful, but isn’t essential. Climate or energy experience isn’t required either — they’re much more interested in strong frontend fundamentals and people who enjoy technically challenging product engineering. This is a good opportunity for someone who wants meaningful ownership, technically difficult frontend work and the chance to build software that has an impact beyond commercial optimisation.

Frontend Software Engineer in London employer: TRG

Join a dynamic and innovative AI-native SaaS platform in London, where as a Senior Rust Engineer, you'll enjoy a flexible, people-first culture that prioritises your well-being and professional growth. With opportunities to work on cutting-edge technology and take full ownership of your projects, you will be part of a lean team that values speed, decisiveness, and collaboration. Benefit from stock options, private medical insurance, and a supportive environment that encourages the use of leading AI tools in your daily workflow.

TRG

Contact Details:

TRG Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Frontend Software Engineer in London

Join Local Tech Meetups

Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at TRG or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!

Contribute to Open Source Projects

Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to TRG.

Tap into Online Developer Communities

Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like TRG.

Explore Job Boards Specifically for Tech Roles

Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like TRG that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!

We think you need these skills to ace Frontend Software Engineer in London

React
TypeScript
Frontend Performance Optimisation
Data-heavy Interface Development
Client-side Caching
TanStack Query
Frontend Testing (Unit, Component, Integration, E2E)

Some tips for your application 🫡

Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.

Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at TRG.

Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at TRG and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!

Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!

How to prepare for a job interview at TRG

Brush Up on Your Coding Skills

For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.

Know Your Tools and Frameworks

Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If TRG uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.

Showcase Your Projects

Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.

Prepare for Behavioural Questions

While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.