Senior Staff Engineer

Department:
Engineering

Location:

United Kingdom

Job Title:

Senior Staff Engineer (Backend & Infrastructure)

Contract:

Permanent, Full-time

Location:

Fully-remote position in the UK. You must already be living in the UK and have the legal right to work here without visa sponsorship, as we’re unable to provide sponsorship for this position.

We are an award-winning eCommerce returns and post purchase specialist, founded in 2015.

With over 250 team members across the UK, Bulgaria, France, Portugal, Germany, and Spain, we are continually innovating the after-checkout experience for our retailers by reducing cost and complexity, driving sustainability, and fostering customer loyalty.

Today, our SaaS platform provides access to over 3,000 carrier lanes across 170 countries, supporting more 1,100 retailers including our leading enterprise and logistics clients The Very Group, New Look, Boden, Selfridges, Sports Direct, The Hut Group, Swarovski, L’Occitane, Photobox, Carrefour, Lands’ End and DHL.

We were the experts in returns. Now we are the experts in the whole post-purchase experience!

Discover more: https://www.zigzag.global/about-us

Our culture is built on three core values, Start-up Spirit, Human Heart, and a Grown-up Mindset which guide how we collaborate and make decisions.

It isn’t something written on posters – it’s something we bring to life every day through our actions, our relationships, and how we show up for each other and our customers.

Everyone plays a role in shaping our culture through how we communicate, support one another, and celebrate success. Being a Zig Zagger means taking ownership, bringing curiosity and energy to everything you do, showing resilience when challenges arise, and leading with care by putting “we before me.” You’ll use sound judgment, stay open to new perspectives, and continuously look for ways to learn, grow, and improve.

We’re looking for an experienced Senior Staff Engineer (Backend & Infrastructure) to play a key role within the team. This position offers significant impact across the product, with broad collaboration across Zig Zag as we unify our post-purchase and returns products into a single, seamless offering. As we advance this transition, you’ll be instrumental in shaping the strategy and enabling teams to execute it effectively across our most critical areas.

You will help define and model best practices, setting clear standards for behaviours, performance, and technical excellence within the backend and infrastructure domains.

Your primary objective will be to drive the development, reliability, and scalability of backend systems and infrastructure, ensuring they effectively support the organisation’s ongoing growth.

This role offers a unique opportunity to influence the direction and success of our product and tech team significantly. If you are passionate about leading backend and infrastructure efforts in a dynamic and growing environment, we would love to hear from you.

• Ruby on Rails and Go for backend
• Type Script, React (with Hooks), Redux, React Testing Library, CSS Modules, Webpack (with federated modules) for frontend
• Hosted on GCP
• Datadog, LogDNA, Sentry for monitoring
• Monolithic infrastructure + introduction of microservices (3 services today)
• PostgreSQL + Elasticsearch + RabbitMQ + Redis for storage
• Kubernetes + Docker for ops

• Play a pivotal role in developing a coherent technology strategy that aligns with the organization's overall goals and product priorities.
• Ensure that architectural decisions for key product initiatives are in harmony with their objectives.
• Ensure service reliability:
  Managing…