Senior Software Engineer - Full-stack

Swiftly is a transit data platform that helps cities and transit agencies improve service reliability, passenger information, and operational efficiency. The Senior Software Engineer will build scalable cloud-based services and modern frontend applications across the stack, while collaborating with Product, Design, and Engineering to deliver customer-focused solutions.

Responsibilities:

• Design, build, maintain, and extend products, features, and functionality that solve real customer problems
• Partner with Product, Design, and Engineering to discover and validate customer needs and technical approaches
• Prototype quickly, and as necessary, to de-risk projects, test assumptions, and iterate ideas into production-ready solutions
• Consistently deliver incremental value by anticipating dependencies, breaking down work, and regularly demoing progress
• Communicate technical trade-offs, present system design proposals clearly, and document architectural decisions
• Apply modern software engineering practices to deliver robust, maintainable, and extensible systems
• Uplevel teammates through code reviews, pairing, and strong collaboration
• Take ownership of your code and product domain, engaging in retrospectives and continuously improving how the team works

Requirements:

• Swiftly is looking for a Senior Software Engineer with experience building scalable cloud-based services
• 5+ years of relevant software engineering experience
• Comfort applying modern AI tools to accelerate development and improve quality
• Full-stack skills: strong in at least one of Java or Node/JavaScript; comfortable building modern frontends (Vue.js a plus); eager to learn across the stack
• Experience building and consuming APIs; proficiency with SQL and non-relational databases, including making informed schema and data-modeling decisions
• Experience with cloud-native architectures and services (AWS preferred)
• Strong product mindset — you use technology pragmatically to solve meaningful customer problems
• Continuous learner who embraces emerging technologies and helps others grow
• Collaborative team player who contributes wherever needed to support team goals
• Open to feedback (a core Swiftly value!), humble in technical debate, and committed to blameless learning and improvement
• Attending these in-person is expected and encouraged, although we understand everyone has different personal circumstances and we will consider requests for exceptions
• Motivated by mission-driven work and excited to improve public transit
• Experience with authentication and authorization is a plus