Eligo Recruitment
Golang Developer
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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 is a strategic technical leadership role where you'll influence architecture, mentor engineering teams, and drive the development of high-scale systems processing significant advertising and customer data volumes across multiple digital channels.
If you've built AdTech platforms, worked with advertising APIs, and enjoy solving complex distributed systems challenges, we'd love to speak with you.
The Role
As a Principal Engineer, you'll provide technical leadership across multiple engineering teams while remaining hands-on with architecture and critical development initiatives.
You'll play a key role in evolving a platform that integrates deeply with major advertising ecosystems, helping merchants optimise campaign performance and maximise customer acquisition ROI.
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Key Responsibilities
- Lead the architecture and design of highly scalable cloud-native systems.
- Drive technical strategy and engineering best practices across the organization.
- 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.
What We're Looking For
Essential Experience
- Significant experience in a Principal, Staff, Lead, or Senior Software Engineering role.
- Strong commercial experience with Go (Golang).
- Experience building and scaling distributed SaaS platforms.
- Strong cloud experience, ideally with Google Cloud Platform (GCP).
- Experience working within AdTech, MarTech, Performance Marketing, or Digital Advertising environments.
- Hands-on experience integrating with advertising platforms and APIs.
Advertising Platform Experience
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We're particularly interested in candidates with experience of:
- Google Ads (highly desirable)
- Microsoft Advertising / Bing Ads (highly desirable)
- Meta (Facebook & Instagram Ads)
- TikTok Ads
- Other paid media and programmatic advertising platforms
Additional Skills
- 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 skills.
Nice to Have
- Experience within 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.
Why Join?
- 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 Midlands.
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