Staff Software Engineer

The Interstellar Squad owns a core part of our commercial platform: the billing run — a mission-critical, high-volume pipeline that turns large-scale usage data into timely, accurate invoices for customers worldwide. It's a technically rich domain: distributed data processing, event-driven workflows, financial correctness, and operational reliability at scale.

We're looking for a Staff Software Engineer to set the technical direction for Interstellar, raise the engineering bar across the squad, and guide delivery of a platform that has to stay correct, predictable and scalable as the business grows.

A central part of this role is leading the gradual modernisation of a mature platform into a set of focused, TypeScript-based domain services — using a strangler-fig approach to extract capabilities incrementally, keeping the existing system safe and our customers unaffected while we evolve the architecture.

You'll report to an Engineering Manager and partner closely with the Product Manager, Delivery Manager and engineers in the squad , as well as peer Leads across the domain. You'll have the mandate to shape how we design, build and run our systems — and the responsibility to keep the team aligned behind that direction.

This role is based in the UK to work alongside the local squad and a team in Poland. You will be expected to travel to our Poland offices at least once a quarter.

Proven experience leading the technical direction of a squad or product area , not only as an individual contributor

Deep, production-proven backend expertise in a modern, strongly-typed stack — ideally Node.js / NestJS / TypeScript and/or PHP 8.x / Symfony

Demonstrable experience modernising or decomposing a mature monolithic / legacy system into smaller services — comfortable with strangler-fig , anti-corruption layers, contract design, dual-write / shadow strategies, and incremental cut-overs

Strong background in distributed systems and event-driven / asynchronous processing (e.g. RabbitMQ, Kafka, SQS)

Experience designing and operating data-intensive, business-critical services where correctness, idempotency and recoverability matter

Strong command of PostgreSQL (query design, indexing, performance tuning); bonus for distributed/sharded setups (e.g. Citus)

Experience owning CI/CD pipelines and release strategy in a team setting (GitLab or equivalent)

Track record of defining and enforcing engineering standards — type safety, clean architecture, testing, observability

Practical experience with observability and SLO-driven operation of production services (metrics, tracing, logs; Grafana or similar)

Strong communication and stakeholder skills : can explain trade-offs to engineers, PMs and senior leadership clearly and honestly

Experience mentoring engineers and developing them over time

Sensible, hands-on exposure to AI-assisted development (e.g. Cursor, Claude Code, GitHub Copilot or similar) with a thoughtful view on where it helps, where it doesn't, and how to use it safely in a team context

Experience leading a PHP → TypeScript / Node transition (or equivalent cross-language modernisation)

Strong understanding of TypeScript at an architectural level : generics, decorators, dependency injection patterns and type system design

Experience with PHP / Symfony monorepos and shared library patterns

Background in billing, financial or metering/rating domains

Familiarity with AWS-based platforms (ECS, S3, Parameter Store, SES)

Experience evolving a team from an IT-delivery mindset toward a Product Operating Model

Exposure to projects involving LLMs or Machine Learning in a production context

Leads with technical credibility — brings architectural confidence without becoming a bottleneck

Creates clarity — turns ambiguous domain problems into simple, well-structured decisions

Modernises pragmatically — knows when to extract a service, when to leave it, and how to keep the lights on while the architecture evolves

Executes through the team — balances writing code with enabling engineers to do their best work

Manages delivery pragmatically — breaks down problems, sequences work, communicates progress and risk early

Manages technical debt with intent — makes informed, defensible calls about when to refactor

Partners with Product — translates business outcomes into technical plans and back again

Coaches and grows people — gives direct, kind feedback and invests in the team's development

Models continuous learning — including thoughtful adoption of new tooling and AI-assisted workflows

The chance to join a creative, entrepreneurial company where bold ideas are celebrated

Full training, ongoing support, and the tools to help you thrive and grow in your role

A company with heart — we genuinely care about our people and make sure everyone feels valued, respected, and part of the team

Tele Interview — Meet the people team

Online Technical Task

Behavioural Interview — Meet your hiring manager & Delivery Manager

Technical Interview - Meet Engineering Manager & a peer Tech Lead

Leadership Interview - Meet your leadership

We've adopted a hybrid working approach to give flexibility on where and how we work. This role is based in the UK to work alongside the local squad and a team in Poland; you'll find out more about what this means for the role during the recruitment process. You will be expected to travel to our Poland offices at least once a quarter.

#LI-Hybrid #LI-CC1

We know the world has changed, and we want to offer our employees the chance to collaborate at our unique office spaces, whilst enjoying the convenience of working from home. We've adopted a hybrid working approach to give more flexibility on where and how we work. You'll find out more about what this means for this role during the recruitment process, but we are currently excited to have our employees experience our office culture as much as possible.

Wireless Logic Group unites and brings people together. We accomplish this when we lead with a lens of diversity, equity, and inclusion in everything we do. As a global company that drives culture we aim to reflect the world’s diverse voices both internally and externally to ensure success in our mission.

By applying for this role, you are consenting for us to hold and process your data in compliance with the General Data Protection Regulations. If you have any questions or wish to exercise your right to access, erase or restrict the holding or processing of your data please contact us ( recruitment@wirelesslogic.com ) and we will respond to your query as soon as possible.