Golang Developer

Principal Software Engineer (Go / AdTech)

Location: West Midlands (Hybrid)

Salary: Competitive Bonus Equity Options

Type: Full-time, Permanent

Build the Future of eCommerce Growth. We're partnering with a rapidly scaling SaaS technology company transforming how eCommerce brands acquire, engage, and retain customers. Following significant growth and investment, we're looking for a Principal Software Engineer to help shape the next generation of our advertising and marketing technology platform. This strategic technical leadership role will influence architecture, mentor engineering teams, and drive development of high‑scale systems processing significant advertising and customer data volumes across multiple digital channels.

As a Principal Engineer, you will provide technical leadership across multiple engineering teams while remaining hands‑on with architecture and critical development initiatives. You will play a key role in evolving a platform that integrates deeply with major advertising ecosystems, helping merchants optimise campaign performance and maximise customer acquisition.

• Lead the architecture and design of highly scalable cloud‑native systems.
• Drive technical strategy and engineering best practices across the organisation.
• Build and optimise backend services using Go.
• Design and develop integrations with major advertising platforms and APIs.
• Collaborate with Product, Data, and Commercial teams to deliver innovative AdTech capabilities.
• Mentor senior engineers and contribute to engineering leadership.
• Champion performance, reliability, security, and observability across the platform.
• Influence technology decisions and long‑term platform evolution.

• Significant experience in a Principal, Staff, Lead, or Senior Software Engineering role.
• Strong commercial experience with Go (Go language).
• Experience building and scaling distributed SaaS platforms.
• Strong cloud experience, ideally with Google Cloud Platform (GCP).
• Experience working within AdTech, Mar Tech, Performance Marketing, or Digital Advertising environments.
• Hands‑on experience integrating with advertising platforms and APIs.

• Experience with Google Ads (highly desirable).
• Microsoft Advertising / Bing Ads (highly desirable).
• Tik Tok Ads.
• Other paid media and programmatic advertising platforms.

• Experience with React and modern frontend development.
• Event‑driven and microservices architectures.
• Data‑intensive systems and analytics platforms.
• CI/CD, Infrastructure as Code, and modern engineering practices.
• Strong stakeholder management and technical communication.

• Experience with in eCommerce technology platforms.
• Exposure to customer acquisition, attribution, campaign optimisation, or marketing analytics products.
• Experience operating at hyper‑growth scale.
• Previous involvement in platform modernisation or large‑scale technical transformation initiatives.

• Join a genuine high‑growth SaaS success story.
• Work on technically challenging products at significant scale.
• Influence business‑critical architecture and technology decisions.
• Collaborative, engineering‑led culture.
• Competitive salary, bonus, and equity opportunity.
• Flexible hybrid working in the West.