[Remote] Backend Software Engineer, Core App
Note: The job is a remote job and is open to candidates in USA. OnePay is a consumer fintech trusted by millions of Americans to make money better. As a Backend Software Engineer on the Core App Team, you will build backend systems that directly power mobile and web user experiences.
Responsibilities
- Design, build, and ship backend services that support user-facing features across mobile and web experiences
- Collaborate closely with frontend engineers, product managers, designers, and data partners
- Lead backend technical planning and contribute to architecture decisions that improve scalability, reliability, and performance
- Proactively identify opportunities to improve user experience through backend optimizations and system enhancements
- Build and maintain clear technical documentation to support a growing and distributed engineering organization
Skills
- 5+ years of professional experience building and scaling backend systems in consumer technology or fintech environments
- Experience designing and operating distributed systems, APIs, and data flows that support user facing applications
- Familiarity with message brokers and event driven systems, as well as caching and performance optimization strategies
- Demonstrated ability to lead technical execution, mentor other engineers, and deliver with a high bar for quality
- Drive and proactivity – everyone here is a builder and executor
- Familiarity with functional programming concepts
Benefits
- Competitive base salary, stock options, and health benefits from Day 1
- 401(k) plan with company match
- Remote-friendly (US), flexible time off (FTO), and opportunities for growth
- A high-growth, mission-driven, inclusive culture where your work has real impact
Company Overview