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# Senior Software Developer

- **Company:** PostGrid
- **Location:** UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Application Programming Interfaces (APIs), C++ (Programming Language), Software as a Service, Node.Js, Performance Tuning, TypeScript, ReactJS, Backend, Front End Software Development, Restful APIs
- **Published:** November 2, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/senior-software-developer/54706298

## About the Role

You are an accomplished software developer with a strong background in backend engineering and a passion for building robust, scalable solutions. You are not only a skilled coder but also a strategic thinker who is comfortable influencing technical direction and mentoring others. Your expertise in building performant APIs and your commitment to clean, maintainable code will be critical to your success in this role., 5+ years of professional experience writing APIs and backend services, ideally with Node.js and TypeScript .
Proven professional experience with front-end technologies like TypeScript and React .
Experience designing and documenting APIs for external use.
Strong understanding and experience with automated testing frameworks.
Excellent technical writing and communication skills., Hands-on experience with Rust/C/C++ in a production environment.
Experience with internal tool-building platforms like Retool or similar frameworks.
Experience working in a high-growth, fast-paced SaaS or scale-up environment.

## Description

As a Senior Software Developer, you will be a key contributor to our core product, responsible for both technical leadership and hands-on development. You'll work closely with founders and senior leadership to not only deliver high-quality code but also to shape the technical direction of our platform. Your work will involve building and optimising our core services and APIs, ensuring our technology remains performant, reliable, and scalable for our growing customer base., Architectural Design: Architect, develop, and maintain scalable REST APIs that can serve a multitude of use cases without compromising on performance or backwards compatibility.
Performance Optimisation: Identify and unlock performance opportunities within existing Node.js services, leveraging Rust to build high-performance components where needed.
Internal Tooling: Create and maintain internal tools and dashboards that empower our sales and logistics teams to operate more efficiently and provide an even better service to our customers.
Documentation & Enablement: Write clear, concise API documentation and technical guides that empower external developers to seamlessly integrate with our platform.
Strategic Collaboration: Work closely with our founders and cross-functional teams to generate new growth ideas, improve existing processes, and ensure our technology aligns with business objectives.