Senior Software Engineer – Backend

Swiftly, Inc.

Senior Software Engineer at Swiftly developing real-time data solutions for efficient transit operations. Focused on algorithms for vehicle tracking, ETA predictions, and system integration with cloud services.

Posted 7/2/2026full-timeRemote • California • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

AWSCloudJavaSQL

About the role

Key responsibilities & impact

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.

Requirements

What you’ll need

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.

Benefits

Comp & perks

Competitive salary
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

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Real-Time AlgorithmsData Infrastructure DevelopmentStreaming SystemsEvent-Driven SystemsPredictive AlgorithmsProduction-Ready SystemsAlgorithm ImplementationOffline Evaluation FrameworksShadow Testing InfrastructureCode Review

Soft Skills

CollaborationCuriosityGrowth MindsetAdaptabilityOpen to Feedback