Job Title

hackajob on-demand focuses on matching talented contractors like you with organisations seeking specific skills for their projects. We use our platform to connect you with exciting contract opportunities and discuss projects on behalf of the companies we partner with.Senior Software Engineer - Staff LevelLocation: UK - remoteRole: contract - 12+ monthsAbout the RoleThey're looking for a Senior Software Engineer to join their team, the engine that connects workers with short- and long-term opportunities. You'll play a key role in modernizing a critical platform, ensuring supply meets demand efficiently while maintaining high performance and reliability.This is a unique opportunity to work on a platform undergoing major technical transformation, moving from a Ruby monolith to a modern ecosystem built on Java, Rust, Python, and React. If you thrive in complex environments, enjoy leading technical change at scale, and like seeing your work have immediate impact, this role is for you.What You'll DoLead feature-by-feature decommissioning of the Ruby monolithDrive architectural decisions and help shape the long-term evolution of the platformCollaborate with cross-functional teams to propose and implement safe, aggressive extraction strategiesEnsure high-quality, reliable code with comprehensive unit, integration, and end-to-end testsMaintain documentation, observability solutions, and performance monitoring across the platformWhat They're Looking ForTechnical Skills:Strong experience in Django or Ruby (with willingness to learn the other)Advanced experience in Java or Rust (with willingness to learn the other)Familiarity with PythonRESTful API and GraphQL developmentDatabase design and optimization (Postgres, MySQL, Redis)Experience leveraging AI tools to accelerate development is a plusSoft Skills:Proven ability to lead complex engineering initiativesStrong collaboration and communication with product and engineering teamsExcellent problem-solving and technical debt assessment skillsLeadership in architecture design and technical decision-makingWhy You'll Love It HereWork with a team of passionate, inquisitive engineers building high-impact systemsOpportunity to influence the technical direction of a fast-growing, evolving platformContinuous learning environment with exposure to cutting-edge technologiesFlexible, supportive culture that values growth, collaboration, and innovationReady to Lead the Marketplace Revolution?Apply today and help them shape the future of work.