Senior/Lead Back End Engineer

RemoFirst is transforming the way businesses hire and manage global teams. Our mission is to enable Freedom of Work by providing an all-in-one global HR platform that simplifies hiring, compliance, payroll, and benefits management. We partner with some of the world's most innovative companies, including Fortune 500 businesses and leading startups. We are a small but strong team of 200+ people (and growing) hyper-focused on delivering a world-class platform and unparalleled service with our industry-leading partnerships. We are looking for a Senior Back-End Engineer with strong experience in both Python and Java to help us maintain and improve our existing Python-based systems and support the design, build, and strategic transition of parts of our backend to Java. This is a hands-on role with strong technical ownership and exposure to global-scale systems. This role goes beyond simply implementing requirements - you'd be a real product engineer taking extreme ownership over the quality of your product, caring deeply about our customers and what's being built. You will collaborate with international engineering, product, and design teams in a fully remote setup. Requirements What you will bring: 5+ years of backend software development experienceStrong professional experience with Python (Django, FastAPI, Flask, or similar frameworks)Strong professional experience with Java, preferably using Spring BootSolid understanding of object-oriented design, SOLID principles, and design patternsExperience designing and consuming RESTful APIsExperience with relational databases (PostgreSQL, MySQL); exposure to NoSQL databases is a plusFamiliarity with unit testing, integration testing, and test-driven development (TDD)Experience with CI/CD pipelines, Git, and modern development workflowsUnderstanding of microservices architecture and distributed systemsExperience working with cloud platforms (AWS preferred)Strong problem-solving skills and attention to performance and scalabilityExcellent written and verbal communication skills in English What you will do: Design, develop, and maintain backend services using Python and JavaSupport and contribute to the gradual migration from Python-based services to Java, ensuring stability and continuityBuild and maintain RESTful APIs and backend integrationsParticipate in system design and architectural discussions, especially around service boundaries and migration strategyWork with distributed systems and microservicesIntegrate with third-party services and external APIsWrite clean, well-tested, and maintainable code following best practicesParticipate in code reviews, technical discussions, and knowledge sharingDebug production issues and improve system reliability, observability, and performanceCollaborate effectively with cross-functional teams across time zones Benefits Fully remote roleOpportunity to work on global-scale systems and productsExposure to international teams and modern engineering practicesHigh ownership and autonomy in a fast-growing startup environmentA strong culture grounded in speed, ownership, trust, transparency, customer obsession, and excellenceReal problems, global impact, and the chance to help redefine how the world works