Full Stack Software Developer - Backend-focused

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 needed
• Own and deliver end-to-end features, from concept through deployment
• Optimize application performance, including database queries, service throughput, and system efficiency
• Collaborate on architecture decisions, code reviews, and technology selection
• Document systems, integrations, and technical solutions
• Mentor junior developers and contribute to a culture of engineering excellence
• Participate in Agile development processes (standups, sprint planning, retrospectives)
• Support production systems through participation in an on-call rotation

• Bachelor's degree in Computer Science (or equivalent practical experience)
• 3+ years of software development experience
• Strong experience building modern full stack applications, with a primary focus on backend development
• Solid understanding of distributed systems, concurrency, and scalable architecture
• Hands-on experience designing and building RESTful APIs
• Experience working with relational databases (schema design, query optimization, stored procedures)
• Proficiency with C#/.NET, SQL Server, and Azure
• Working knowledge of JavaScript/TypeScript and Angular for frontend development
• Experience with Git (or similar version control systems)
• Familiarity with Azure DevOps or similar tools for tracking work and defects
• Experience working in Agile environments, with exposure to CI/CD pipelines and automated testing
• Participation in at least one full software development lifecycle

• Full Healthcare: Health, dental, vision, and more
• Support & Growth: Parental Leave, Tuition Reimbursement, Volunteer Time, and more for your personal and professional development.
• Learning & Development: Unlimited resources via HSI's Learning Management System and career training.
• Remote Work: Work from anywhere that boosts your productivity.
• Flexible Vacations: Take needed breaks with our generous time-off policy.
• Retirement Security: Benefit from our $1:$1 company match for retirement savings.