Senior Software Engineer - Golang / TypeScript

Role Description

You’ll take ownership of features across the Threecolts Hub, Golang and TypeScript-based systems, delivering them from initial design through to production. You’ll design and build clean, scalable services, APIs, and components that are maintainable, well-tested, and performant.

• Hub is the central platform where Threecolts customers access their products, manage subscriptions, add companies and organisations, update plan types, and handle billing and payments.
• Your work will directly support the customer account experience and the systems that connect users to the wider Threecolts product ecosystem.
• You’ll operate independently within a defined scope, making sound technical decisions and balancing speed with long-term quality.
• You’ll play an active role in improving the systems you work on, debugging production issues, identifying root causes, and implementing durable fixes.
• You’ll contribute to technical discussions, help evolve architecture within your domain, and raise the bar through thoughtful code reviews.
• Collaboration is key: you’ll work closely with Product, QA, DevOps, and other product teams to build reliable platform functionality that supports both customers and internal teams.

Qualifications

• 5–8+ years of professional software engineering experience
• Strong proficiency in Golang and TypeScript
• Experience building and maintaining backend services, APIs, and scalable application components
• Experience working across frontend and backend systems, or strong backend experience with enough TypeScript to contribute confidently
• Solid understanding of REST APIs, system design, and scalable application patterns
• Experience working with SQL and/or NoSQL databases and data modelling
• Familiarity with cloud infrastructure, ideally AWS
• Experience working on authentication, account management, billing, payments, subscriptions, or platform products would be beneficial
• Experience debugging production systems and resolving issues independently
• Comfortable working with Git, code reviews, and team-based development
• Ability to work across an existing codebase and improve quality without over-engineering

Requirements

• You have a strong ownership mindset and consistently deliver high-quality work.
• You make pragmatic technical decisions, understanding when to prioritise speed and when to invest in scalability, reliability, and maintainability.
• You’re comfortable working on platform-level products where reliability, usability, and clean integrations matter.
• You care about the customer experience, but you also understand the internal systems and operational workflows that sit behind it.
• You communicate clearly, work well with cross-functional teams, and look for ways to improve both the product and how the team operates.
• This role will suit someone who enjoys solving practical product and platform problems, building scalable systems, and improving the foundations that customers rely on to access and manage their Threecolts products.

Benefits

• Salary: £ 90,000 per year
• 25 days PTO
• Healthcare & Pension benefits
• Opportunity to join company-wide offsites
• Regular rate reviews and bonus opportunities
• Fully remote/hybrid working