About the job

Join Online Filings as a Senior Software Engineer in London (hybrid), where you will play a key role in architecting, developing, and scaling the company’s next-generation web applications and RESTful APIs that help entrepreneurs and small businesses manage administrative processes efficiently. In this position, you will lead technical design decisions, build secure and high-performance backend services using Node.js, Express, and TypeScript, develop responsive and user-focused front-end applications with React and Next.js, design and optimise PostgreSQL/SQL databases, and integrate external platforms such as AWS, Stripe, Twilio, Google services, and HMRC while ensuring strong security, reliability, and performance standards. You will mentor junior developers, enforce code quality through reviews, automated testing, and CI/CD practices, collaborate with cross-functional teams to deliver scalable solutions aligned with business goals, and continuously introduce modern tools and best practices to improve development efficiency, all within a growing technology-driven environment offering competitive salary, bonus potential, comprehensive health benefits, flexible hybrid working, and long-term career growth opportunities.