Note: The job is a remote job and is open to candidates in USA. Swiftly, Inc. is on a mission to help cities move more efficiently through its leading transit data platform. The Senior Software Engineer - Backend will develop predictive algorithms and contribute to real-time data pipelines and cloud services that enhance passenger information and transit operations.

Responsibilities

• Design, evaluate, build, and maintain real-time algorithms and systems for vehicle tracking, map-matching, ETA predictions, and disruption detection
• Contribute to Swiftly's real-time data pipelines, APIs, and cloud services that power customer-facing products
• Build data infrastructure to support rigorous algorithm development, validating changes at scale before they reach production. This may include pipelines for capturing and replaying real-time data, offline evaluation frameworks, and shadow testing infrastructure
• Collaborate with product managers, designers, and engineers to prototype solutions, validate approaches, and deliver incremental value
• Break down complex problems into smaller, testable pieces to help the team move quickly and reliably
• Share designs and technical decisions openly, weighing tradeoffs and documenting for alignment
• Apply modern engineering practices to deliver robust, maintainable, and extensible code
• Support and elevate teammates through code reviews, pairing, and knowledge sharing
• Take ownership of your work and team outcomes, continuously reflecting and improving

Skills

• 5+ years of software engineering experience, ideally with data-intensive or real-time systems
• Experience with Java and cloud-native backend services (AWS preferred)
• You've taken algorithms from idea to implementation, delivering production-ready systems that drive real-world impact
• Strong understanding of real-time data processing, such as streaming, event-driven, or predictive systems
• Comfortable building and consuming APIs; proficient with SQL
• Curiosity and excitement about applying predictive algorithms to solve real-world problems in transit
• Growth mindset and adaptability in a fast-changing technical landscape
• Collaborative, humble, and open to feedback; thrives in blameless, team-oriented environments
• Experience with Apache Kafka
• Python/JupyterHub
• JavaScript/Vue.js
• AWS Step Functions

Benefits

• Equity compensation (company ownership) for every employee
• Medical, Dental and Vision
• Retirement with Employer Match
• Flexible Spending Account (FSA)
• Home office setup reimbursement
• Monthly cell/internet reimbursement
• Monthly "Be Well" stipend
• Flexible PTO with a recommended minimum
• Flexible work environment
• 16 paid holidays - including months without US national holidays
• 12 fully paid weeks of leave for child birth/adoption

Company Overview