At Complii, we are on the lookout for a Senior Developer to play a key role in strengthening and scaling a business-critical technology platform. This role is focused on reducing risk, supporting significant scale, and helping secure the technical foundations needed to deliver our long-term vision of connected customer technology. If you enjoy working on complex systems, bringing clarity to areas of technical uncertainty, and having real influence over architectural decisions early on, this is a role where your impact will be felt quickly and meaningfully. You will play a critical role in providing technical cover across the orchestration layer of our platform, which is currently the area of highest risk and opportunity. From day one, the priority is reducing risk, supporting delivery at scale, and helping the wider team gain confidence in the codebase and future direction of the platform.What you receive for joining us We believe in rewarding expertise and accountability, which is why we offer an excellent salary. This includes 25 days holiday plus bank holidays, an additional day off for your birthday, a collaborative and supportive working environment, and the opportunity to work closely with senior leaders who value clarity, technical judgement, and delivery.Here is a look at some of the things you will be doingSupporting and contributing to the Ruby on Rails orchestration layer, helping to reduce technical risk and ensure the platform is robust, scalable, and well unde