As a Senior Full-Stack Engineer on our new UK-based team, you will help us build a financial B2B SaaS platform using TypeScript, 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 up a new team and a cutting-edge platform.
This is a hybrid position – working 3 days a week from our Winnersh office.
Key Responsibilities
* Take full ownership of the feature development lifecycle, from concept and design to testing and deployment.
* Collaborate with product managers, designers, and other software engineers to translate requirements into well‑architected, user‑friendly features.
* Write clean, scalable, and high‑performance code for both the backend (Node.js) and the frontend (React/TypeScript).
* 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.
Qualifications
* 5+ years of professional experience in software development for scalable, web‑based applications.
* Experience in building large‑scale, maintainable applications, with proficiency in TypeScript/JavaScript.
* Proven experience building and maintaining backend services with Node.js and a common framework (e.g., Fastify, Express, NestJS).
* JavaScript performance optimization – 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.
Bonus Points
* Experience with Browser DB (IndexedDB) and Sync Engine pattern.
* Experience with data‑intensive applications or financial modeling.
Soft Skills
* 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.
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