Full Stack Software Developer - Backend-focused

Full Stack Software Developer HSI is a leading provider of environment, health, and safety (EHS), compliance, and professional development solutions that empower organizations to build safer, smarter workplaces. Through our integrated platform, we deliver training, compliance tools, and workforce development solutions to companies around the world.We're looking for a Full Stack Software Developer with a strong backend focus to join our growing engineering team. In this role, you'll play a key part in building scalable, high-quality software by owning backend services, APIs, and integrations—while also contributing to frontend development to deliver complete, end-to-end solutions.This is an opportunity for a developer who enjoys taking ownership of meaningful features, influencing technical direction, and mentoring others while continuing to grow their own skillset.What You'll Do Design, build, and maintain scalable backend services, APIs, and data layers, with frontend contributions as neededOwn and deliver end-to-end features, from concept through deploymentOptimize application performance, including database queries, service throughput, and system efficiencyCollaborate on architecture decisions, code reviews, and technology selectionDocument systems, integrations, and technical solutionsMentor junior developers and contribute to a culture of engineering excellenceParticipate in Agile development processes (standups, sprint planning, retrospectives)Support production systems through participation in an on-call rotation