Lead Engineer - Stock Trading App

This full-time position at Bjak in the United Kingdom requires a Lead Engineer to take technical ownership of complex stock trading products and systems. The role involves designing scalable, reliable, and maintainable architectures across backend, frontend, APIs, databases, and infrastructure. You will remain hands-on by writing code, prototyping, reviewing pull requests, debugging, and solving production issues. The job demands making strong technical decisions and trade-offs that balance speed, scalability, reliability, and maintainability. You are expected to guide other engineers and drive major initiatives from initial concept through to production. The employer seeks individuals who are passionate about building next-generation financial products rather than maintaining the status quo. They value people who work for their passion rather than counting hours and who care about making finance accessible to a broad audience. The company has a global team with over twenty nationalities, operating from offices and remotely. This role suits a driven engineer who is comfortable moving between high-level architecture and detailed implementation. It is ideal for someone who wants to raise the engineering bar across the team while executing on difficult technical problems. The advert does not specify particular programming languages, required years of experience, or specific qualifications. It also does not detail specific working arrangements beyond the general mention of remote and office-based teams.