Senior Software Developer

PostGrid; Manchester; On-site; GBP 60,000 - 80,000; Full time

Job summary

A leading technology firm in the UK is seeking a Senior Software Developer to contribute to their core product and optimize performance for their APIs. You will work closely with founders and teams, delivering high-quality code while influencing technical direction. The ideal candidate has over 5 years of experience with Node.js, TypeScript, and a strong understanding of API design. This role offers competitive pay and a flexible work environment that encourages innovation.

Benefits

Competitive Pay

Flexible Work

Learning Opportunities

Qualifications

• 5+ years of professional experience writing APIs and backend services.
• Proven experience with front-end technologies like TypeScript and React.
• Strong understanding of automated testing frameworks.

Responsibilities

• Architect, develop, and maintain scalable REST APIs.
• Identify performance opportunities within existing Node.js services.
• Create and maintain internal tools and dashboards for efficiency.

Skills

Node.js

APIs

TypeScript

React

Rust

Tools

Automated Testing Frameworks

Retool

Job description

About PostGrid

PostGrid is a global leader in enterprise SaaS platform for automated offline communications. Our robust APIs empower organizations to create, personalize, and dispatch physical mail letters, postcards, checks, and more to any address on the globe without ever touching an envelope, while ensuring clean address data. Operating at massive scale across multiple regions, we’re redefining how brands connect with people beyond the inbox. If you’re driven to build category-defining technology and want to shape the future of offline communications, join our high-caliber team and help us transform the way the world sends mail.

About The Team

The Engineering team at PostGrid is at the forefront of revolutionising the offline communications industry. We are a team of problem-solvers who design and build robust, scalable, and elegant solutions that empower organisations to connect with their customers beyond the digital world. As a senior member, you will have a direct impact on our core product, tackling complex challenges and building the foundational infrastructure that drives our global platform.

What you’ll do

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.

Your Responsibilities

• 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.

What Will You Bring To This 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.

Minimum Requirements

• 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.

Preferred Qualifications

• 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.

Our Commitment to Diversity

PostGrid is an equal opportunity employer and values the diversity of backgrounds and perspectives. We strive to cultivate an inclusive environment of understanding to have a greater impact on our business and our customers. We encourage applicants from underrepresented groups and do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or criminal history, in accordance with applicable local, state, and / or federal laws.

Ready to make your mark?

Join PostGrid’s tight‑knit, high‑energy team and build technology that powers global offline communications. With competitive pay, flexible work, and a learning‑obsessed culture, you’ll ship bold ideas fast and see your impact instantly. Hungry for challenge and craftsmanship? Apply today and help us reinvent how the world connects beyond the inbox.