Senior Full-Stack Software Engineer

Job Overview

As a Senior Full‑Stack Engineer on our new UK‑based team, you will help us build a financial B2B SaaS platform using Type Script, React, and Node.js. You’ll tackle our unique challenge: ensuring high performance on an application that handles complex financial calculations and large datasets.

With a 60/40 backend‑to‑frontend focus, this role is perfect for a proactive engineer who is passionate about building high‑performance software throughout the stack and thrives in a multicultural environment. This is a fantastic opportunity to grow your skills while shaping a new team and a cutting‑edge platform.

This is a hybrid position – working three days a week from our Winnersh office.

• Take full ownership of the feature development lifecycle, from concept and design to testing and deployment.
• Collaborate with product managers, designers and other engineers to translate requirements into well‑architected, user‑friendly features.
• Write clean, scalable and high‑performance code for both backend (Node.js) and frontend (React/Type Script).
• Collaborate with field teams to support our customers, debug issues and offer prompt solutions.
• Participate in code reviews and contribute to the continuous improvement of our development processes.
• Improve the performance, scalability and security of the platform.
• Develop and maintain comprehensive tests to ensure software quality and reliability.
• Contribute to our Node.js and AWS backend services.
• Stay up‑to‑date with the latest trends in web development and cloud‑based SaaS technologies.

• 5+ years of professional experience in software development for scalable, web‑based applications.
• Experience in building large‑scale, maintainable applications, with proficiency in Type Script/JavaScript.
• Proven experience building and maintaining backend services with Node.js and a common framework (e.g., Fastify, Express, NestJS).
• JavaScript performance optimisation – you know how to profile, debug and refactor code to make it faster.
• Experience in modern frontend frameworks (e.g., React, Vue, Svelte).
• Experience with AWS infrastructure.
• Experience with CI/CD pipelines.
• Bachelor’s degree in Computer Science, Software Engineering or a related field from a university or a leading college.

• Experience with Browser DB (Indexed
  
  DB) and Sync Engine pattern.
• Experience with data‑intensive applications or financial modelling.

• Strong problem‑solving abilities and an eagerness to learn.
• Excellent communication skills and the ability to work well in a multicultural environment.
• High attention to detail and a commitment to delivering high‑quality work.

Mid‑Senior level

Full‑time

Engineering and Information Technology

Software Development