Junior developer with front-end experience

Tussell; Greater London; Hybrid; GBP 40,000 - 50,000; Full time

Benefits offered by this job

Hybrid working

Annual salary reviews after 12 months

Office in Hoxton

Learning & development budget

Job summary

Tussell, a London-based data company, invites a junior front-end developer to help reimagine user interfaces for public procurement data. Work on UI layers of Rails and React apps, mentored by senior engineers, contributing from day one.

You’ll collaborate with product, design and engineering teams, build responsive interfaces with HTML/CSS/JS, and gain hands-on experience across the stack in a fast-growing environment.

Qualifications

• JavaScript fundamentals with modern JS ecosystems like Node and Yarn.
• Practical React experience (React 19, functional components and hooks).
• Familiarity with Ruby on Rails views/partials and debugging UI in browser dev tools.
• Clean, maintainable CSS using utility-first frameworks (Tailwind) and modern layout techniques.
• Experience unit testing JavaScript (Jest/RTL) and Git workflows.

Responsibilities

• Build and maintain front end code using JavaScript and React components within existing patterns.
• Wire up React components in Rails views/partials.
• Implement UI designs from mockups, Figma files, or requirements.
• Fix bugs and make incremental improvements to views and components.
• Write and maintain unit tests for JavaScript and webpage components.
• Collaborate with designers, product managers and engineers to turn requirements into UI.
• Participate in code reviews and Git workflows.
• Pair program and onboarding to develop under mentorship.

Skills

JavaScript fundamentals

React practitioner

Rails-literate

CSS/design oriented

Tested and collaborative

Ready to grow

React

Ruby on Rails

Tailwind CSS

Stimulus

Tools

React

Ruby on Rails

Tailwind CSS

Stimulus

Job description

Location: Hoxton, London, with hybrid working

Contract: Permanent, full-time

Reporting to: Dominic Sayers, Chief Technology Officer

Start date: ASAP

Salary: up to £50k

SUMMARY

Tussell is seeking a junior developer with some front-end experience to join our product engineering team.

There's a great opportunity here to help shape how our users experience Tussell's market-leading data. We're re-imagining our user interfaces to make complex public procurement datasets easier to explore, filter and understand, and a junior developer joining now will have plenty of scope to make a visible, lasting impact on the product.

The ideal candidate will have some hands-on experience with HTML, CSS, and JavaScript and a keen interest in user interface design. At Tussell we use frameworks, including React.js, along with Ruby on Rails for our web applications and APIs. You don't need years of experience; you could have recently completed a software bootcamp or have a year or two of industry experience. We're looking for a good grasp of software development fundamentals and the enthusiasm to learn our specific design patterns and domain. You'll work closely with our product, design and engineering team to make sure the interfaces we build genuinely serve our users' needs.

Our ideal candidate may not exist.

Please consider applying if you think you can contribute in this role despite not having experience in every area we've identified; we're looking for a Tussell person first and foremost, and skill gaps can be addressed through onboarding, mentoring, and a personal development plan.

ABOUT TUSSELL

Founded in 2015, Tussell is a founder-led and investor-backed tech scale-up based in London.

Tussell's vision is to be the definitive source of market intelligence on UK government contracts. In a climate of unprecedented government spending, our data helps companies to win more public contracts by making better commercial decisions. Our competitive edge is expressed through the richness and reliability of our data, and as a result, over the last decade, we have become the market’s trusted source.

We strive to be a great business, and we’re also proud to make a difference along the way. The enhanced transparency that Tussell fosters makes the government more accountable for spending decisions. It also helps to make public procurement more efficient and accessible, ultimately improving value for money in public services.

Tussell has an entrepreneurial culture and is focused on growing profitably through customer sales, rather than relying on successive rounds of venture capital funding. We have a dynamic, welcoming team meaning we’re small enough for you to know everybody’s name.

THE ROLE

Goal: We're looking for a junior developer with front-end experience to join the team maintaining our Ruby on Rails and React.js applications. This is a hands-on role from day one, working on the UI layer of a live, data-heavy product, with support and mentoring from senior engineers as you learn our specific design patterns and domain.

Frontend Development

• Build and maintain front end code, including JavaScript using frameworks such as React components and Stimulus controllers, within our existing patterns

• Work in our Rails views and partials, editing view templates and wiring up React components inside them

• Implement UI designs using HTML elements and CSS, working from mockups, Figma files or written requirements

• Fix bugs and make incremental improvements to existing views and components

• Write and maintain unit tests for the JavaScript and webpage components you work on

Collaboration & Delivery

• Collaborate with designers, product managers and other engineers to turn requirements into working UI

• Participate in code review and collaborative Git workflows

• Be willing to ask for help and pair program as you get going; we're investing in your professional development, not expecting a finished product

ABOUT YOU

• JavaScript fundamentals: You have experience with modern JavaScript, its ecosystem, like Node and Yarn, and how to work with its libraries and frameworks as part of front-end code

• React practitioner: You have practical experience with React (we use React 19, functional components and hooks) and a good eye for UI detail, including spacing, consistency, accessibility and responsive behaviour.

• Rails-literate: You're familiar with Ruby on Rails, including views and partials for rendering data, and you're comfortable debugging UI issues using browser dev tools.

• CSS/design oriented: Write clean, maintainable CSS to implement responsive, accessible UI designs, using utility-first frameworks (e.g. Tailwind CSS) and modern layout techniques (Flexbox, Grid) within the established webpage design approach and keen to contribute further improvements.

• Tested and collaborative: You’ve done some unit testing of JavaScript (Jest, React Testing Library or similar) and are familiar with Git and collaborative workflows, including branches, pull requests and code review.

• Ready to grow: You're confident working independently on small-to-medium tasks as you get up to speed with the codebases and willing to ask for help; we'll teach you the specific tools, libraries and frameworks used for our specific stack.

COMPENSATION & BENEFITS

Annual salary reviews every December after 12 months of tenure.

Benefits include:

• Hybrid working.

• Annual leave of 25 days (not including public holidays), rising by one day per year up to a cap of 30 days.

• A vibrant office in Hoxton with free weekly perks.

• An annual personal learning & development budget.

• Team socials in central London at least once per quarter, plus a summer and Christmas party.

• The latest tech - Apple MacBooks are standard issue.

• Company pension scheme with employer contribution of 3%.

• Cycle to Work Scheme - tax savings on cycling equipment via salary sacrifice.

• An annual wellbeing budget of £200 (prorated).

INTERVIEW PROCESS

1. Initial cultural fit interview:

   • With the hiring manager Dominic Sayers, Chief Technology Officer.

   • Virtual

   • 30 mins

2. Technical assessment interview:

   • With one of our engineering team

   • Discuss a bootcamp project you delivered, present a small project you have worked on, or your response to a technical challenge set by us

   • In our Hoxton office

   • 1 hour

3. Decision & offer