Senior Software Engineer - Golang / TypeScript

Threecolts LLC; United Kingdom; Hybrid; GBP 81,000 - 99,000; Full time

Benefits offered by this job

25 days PTO

Opportunity to join company-wide offsites

Regular rate reviews and bonus opportunities

Fully remote/hybrid working

Job summary

Threecolts LLC is seeking a Senior Software Engineer specializing in Golang and TypeScript to enhance the Threecolts Hub. In this role, you'll design and build scalable services, APIs, and components, and contribute to a collaborative technical environment.

Ideal candidates should have 5–8+ years of experience, strong backend and API knowledge, and an ownership mindset. The role offers fully remote/hybrid working and competitive benefits including 25 days PTO and salary reviews.

Qualifications

• 5–8+ years of professional software engineering experience.
• Experience debugging production systems and resolving issues independently.
• Comfortable working with Git, code reviews, and team-based development.

Responsibilities

• Take ownership of features across the Threecolts Hub.
• Design and build clean, scalable services and APIs.
• Contribute to technical discussions and code reviews.

Skills

Golang

TypeScript

Backend services

REST APIs

SQL

NoSQL

Cloud infrastructure (AWS)

Git

Job description

Senior Software Engineer - Golang / TypeScript

United Kingdom

About Threecolts

Threecolts is the leading software suite for online & offline consumer brands (Amazon, Walmart, Target, Shopify, eBay, etc.). We’ve built a powerful ecosystem of software solutions to help businesses grow smarter — from revenue recovery and retail finance, to multichannel operations and pricing optimization. With over 500 employees globally and strong backing, we’re scaling fast across new markets and new partner channels.

Who We Are

We’re a global team built for speed, trust, and impact. As an AI‑enabled company, AI is integrated across Threecolts from development through to operations, empowering teams to move faster, build better, improve quality, and make more informed decisions. We hire exceptional people from all backgrounds and give them the autonomy to move fast and the accountability to deliver, where you will wear multiple hats, take ownership of challenges, and proactively solve problems beyond your immediate scope. Change is constant, ambiguity is part of the deal, and clear, concise communication is how we stay aligned, so when in doubt, bring people in.

Key Responsibilities

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.

• 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

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‑function 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
• Opportunity to join company‑wide offsites
• Regular rate reviews and bonus opportunities
• Fully remote/hybrid working