Junior Software Developer

Haystack

United Kingdom · Full-time · Entry

Junior Software Developer | £40,000 - £45,000

We're working with a high-growth, award-winning fintech disruptor named in the Financial Times 1000 fastest-growing companies on this exciting opportunity. This is a chance for a high-potential developer to join a lean, agile team and play a fundamental role in building a bespoke, automated lending platform alongside the company’s co-founders.

If you are a frontend-focused engineer with a passion for clean UI and modern tech stacks like React, Next.js, and TypeScript, this is your opportunity to see your code directly impact the scalability of a rapidly evolving financial enterprise. You’ll be working at the intersection of finance and cutting-edge tech, integrating AI-assisted development tools to drive operational efficiency.

The Role

Architect and maintain high-performance web applications using React and Next.js platforms.
Create intuitive and highly polished user interfaces with a heavy focus on UX/UI design and modern CSS libraries.
Seamlessly integrate frontend components with RESTful APIs and backend services powered by Node.js.
Join a collaborative, co-founder led team focusing on Test Driven Development (TDD) and CI/CD pipeline management.
Support the transition toward data-driven lending through automated processes and intelligent backend integrations.

What You'll Need

Professional proficiency in TypeScript and modern JavaScript (ES6+).
Hands-on experience building web applications with React and the Next.js framework.
Solid understanding of Node.js for backend support and API integration.
Exposure to cloud environments such as Azure, AWS, or GCP and an understanding of CI/CD workflows.
Bonus points for experience with Python, FastAPI, Model Context Protocol, or AI-assisted development tools.

What's On Offer

Competitive salary of £40,000 - £45,000 in a fast-paced fintech environment.
Hybrid working model (4 days in-office in London, 1 day remote) for the perfect balance of collaboration and focus.
Direct mentorship from co-founders and a seat at the table in a small, agile engineering team.
Opportunity to work with cutting-edge tech including AI agents and automated lending platforms.

Apply via Haystack today!

Key Skills

Ranked by relevance

react ai typescript cicd restful apis javascript fastapi python cloud css tdd aws gcp ui

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