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Sage

Full-Stack Software Engineer

Hybrid

Winnersh, United kingdom

Junior

Full Time

11-11-2025

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Skills

Communication JavaScript TypeScript MySQL CI/CD Problem-solving Attention to detail Databases react node.js AWS Software Development CI/CD Pipelines Web Development

Job Specifications

Job Description

Job Overview:

As a 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 an 80/20 frontend-to-backend focus, this role is ideal for someone who takes initiative, is passionate about creating excellent software, 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 role – three days per week in our Winnersh office***

Key Responsibilities:

Collaborate with product managers and designers and other SW engineers to translate requirements into well-architected, user-friendly features.
Write clean, scalable, and high-performance code for both the front end (React/TypeScript) and backend (Node.js).
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
Work closely with the design team to ensure the platform is user-friendly and follows UI/UX best practices.
Contribute to our Node.js and AWS backend services as needed.
Stay up-to-date with the latest trends in web development and cloud-based SaaS technologies.

Required Qualifications:

3+ years of professional experience in software development for scalable, web-based applications.
Strong proficiency in modern frontend frameworks (e.g., React, Vue, Svelte).
Experience in client-side JavaScript performance optimization. You know how to profile, debug, and refactor code to make it faster
Experience with Node.js
Experience with RESTful APIs and relational databases (e.g. MySQL).
Familiarity 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 in building large-scale, maintainable applications, with proficiency in TypeScript/JavaScript.
Familiarity with AWS infrastructure.
Experience with data-intensive applications or financial modeling.

Soft Skills:

Strong problem-solving abilities and passion to learn.
Excellent communication skills and the ability to work well in a team, in a multicultural environment.
High attention to detail and a commitment to delivering high-quality work.

About the Company

At Sage, we knock down barriers with information, insights, and tools to help your business flow. We provide businesses with software and services that are simple and easy to use, as we work with you to give you that feeling of confidence. Customers trust our Payroll, HR, and Finance software to make business flow with ease. From our local network of experts to our ever-growing partnerships, we are on hand to give you all the insights you need to thrive. Know more