Senior Software Developer, UK

Reports To: Development Manager, UK

Location: Hybrid (2 days in the office) London, England

About the Job:
We’re looking for a Senior Software Developer to build high-impact features powering real-time, high-volume systems. Central to our platform is a breakthrough offline-first architecture that enables seamless, reliable transaction processing, even in environments with limited or unreliable connectivity. This capability is a critical advantage in live event settings. Backed by fresh capital from top-tier investors, we’re entering an exciting phase of growth as we execute an ambitious European expansion strategy.

Our Tech Stack:

• Front End: React Native, React, JavaScript
• Backend: Ruby, Rails, GraphQL, PostgreSQL, Redis, CouchDb
• Cloud Platform: AWS
• Tools: GitHub, Sidekiq

What We’re Looking For:

• Strong experience with React Native and native mobile layers (Swift/Kotlin exposure is a plus)
• Solid knowledge of React, including Hooks, state management, and Redux
• Excellent JavaScript fundamentals

Nice to Have:

• Familiarity with GraphQL, Ruby on Rails
• Experience with front-end testing frameworks

Key responsibilities:

• Own the technical design for projects of moderate complexity
• Deliver robust, scalable user experience projects with minimal supervision, but through collaboration with product, design, and QA
• Actively identify opportunities and risks across products and teams, mentor junior developers, and drive best practices
• Architect services and systems using accepted design patterns that allow for iterative, autonomous development and future scaling
• Proactively identify technical debt before it becomes a long-term problem while balancing the effort/reward of corrective action
• Anticipate future use cases and make design decisions that minimize the cost of future changes
• Be considered the expert trouble-shooter within your domain of expertise: lead investigations within area of specialization while maintaining a strong sense of product impact