Senior Backend Software Engineer

Senior Backend Developer (Tech Lead Pathway) Location: Finland (Hybrid) Salary: €6,000 - €6,500 per month+ Benefits Type: Permanent, Full-Time Ready for the Next Step in Your Career? Are you a Senior Developer who enjoys solving complex technical challenges and wants more influence over architecture, technical direction, and team development? Our client, a leading digital marketplace business serving millions of users, is looking for a Senior Backend Developer who is ready to take the next step towards a technical leadership position. This opportunity is ideal for someone who wants to remain hands-on with development while gradually taking ownership of technical decisions, mentoring junior developers, and helping shape engineering best practices. The Role Working within a modern product engineering environment, you will contribute to the design, development, and continuous improvement of large-scale digital platforms. You'll collaborate closely with experienced engineers and product teams while gaining exposure to architectural decision-making and technical leadership responsibilities. You will be encouraged to take ownership, share knowledge, and develop the skills needed to progress into a future Lead Developer or Technical Lead position. Key Responsibilities Design and develop scalable backend solutions using modern technologies.Contribute to architecture discussions and technical decision-making.Build and maintain APIs, integrations, and business-critical services.Optimise application performance and database efficiency.Participate in system modernisation and technical improvement initiatives.Support code quality through reviews, testing, and best practices.Mentor junior developers and share technical knowledge within the team.Work closely with stakeholders to translate business requirements into technical solutions.Explore and adopt AI-assisted development tools and modern engineering practices. Required Experience Strong backend development experience using Node.js and TypeScript.Solid understanding of software architecture principles.Experience working with PostgreSQL or other relational databases.Familiarity with cloud technologies and modern deployment practices.Experience with automated testing and CI/CD processes.Strong communication skills and a collaborative mindset.Fluent Finnish language skills. Nice to Have React and Next.js experience.AWS and Docker knowledge.Marketplace, e-commerce, or high-traffic platform experience.Previous mentoring or coaching experience.Experience working with AI development tools such as GitHub Copilot or Claude Code.Experience contributing to architectural decisions within a product-focused environment. Technology Stack Node.jsTypeScriptPostgreSQLReactNext.jsAWSDockerCI/CD PipelinesMonorepo Architecture Reach out on g.heron@tenthrevolution.com to learn more!