ABOUT US At Hayden AI, we are on a mission to harness the power of computer vision to transform the way transit systems and other government agencies address real-world challenges. From bus lane and bus stop enforcement to transportation optimization technologies and beyond, our innovative mobile perception system empowers our clients to accelerate transit, enhance street safety, and drive toward a sustainable future. JOB SUMMARY Hayden Portal is the full-stack web application that connects all Hayden products. It’s the central platform used by transit agencies, enforcement partners, operations teams, and customer success to manage fleets, review video data, and ensure compliance. Portal drives Hayden’s core business and is a critical touchpoint for our customers and internal teams alike. We’re looking for a full-stack Senior Software Engineer to join the Portal team and help build the next generation of Hayden’s mission-critical platform. You’ll work as part of a cross-functional team to deliver scalable, performant, and intuitive systems across the stack—from backend APIs to polished, data-rich UIs. As a senior contributor, you’ll own major features end-to-end, mentor other engineers, and influence technical direction. You’ll thrive if you’re pragmatic, product-minded, and passionate about building high-quality software that makes a real-world impact. RESPONSIBILITIES TECHNICAL OWNERSHIP * Design, implement, and maintain robust backend services and modern frontend components for Portal. * Collaborate on system architecture and technical decisions across the stack, balancing performance, scalability, and maintainability. * Write clean, well-tested, and documented code that supports long-term product growth. COLLABORATION & MENTORSHIP * Partner closely with Product Management, Design, and Operations to deliver features that meet customer needs. * Provide technical guidance and mentorship to mid-level and junior engineers on the team. * Participate actively in code reviews, design sessions, and technical planning. DELIVERY EXCELLENCE * Contribute to a culture of quality, reliability, and continuous improvement. * Help evolve our developer processing: from observability, to testing, to CI/CD pipelines. * Take ownership of production stability and performance, including troubleshooting and debugging complex issues. REQUIRED QUALIFICATIONS * Bachelor’s degree in Computer Science, Engineering, or a related field—or equivalent practical experience. * 5+ years of professional software engineering experience building modern web applications. * Strong proficiency in both frontend and backend development. * Expertise with React (or similar frameworks) and modern JavaScript/TypeScript. * Experience with Python and/or Golang in production environments. * Solid understanding of relational databases (PostgreSQL, MySQL, or similar). * Familiarity with event-driven architectures and RESTful API design. * Comfortable with cloud platforms such as AWS (S3, EC2, RDS, Cognito, etc.). * Strong collaboration and communication skills, with the ability to work cross-functionally. PREFERRED QUALIFICATIONS * Experience with Terraform, Kubernetes (EKS), or containerized deployment pipelines. * Background in building data-intensive or geospatial web applications. * Prior experience building web applications for computer vision, video processing, or robotics domain. * Passion for transportation technology, civic innovation, or sustainability.