Senior Backend Engineer
Job in
Virginia, St. Louis County, Minnesota, 55792, USA
Listed on 2026-02-28
Listing for:
Amplify IT
Full Time
position Listed on 2026-02-28
Job specializations:
-
Software Development
Backend Developer, Software Engineer, Cloud Engineer - Software, DevOps
Job Description & How to Apply Below
Chargeblast is a rapidly growing fintech company helping merchants prevent and fight chargebacks provide innovative solutions to protect revenue and optimize payment strategies. Join our team and enjoy real autonomy, direct product impact, and the chance to build high-performance, secure, and reliable systems in a dynamic, bureaucracy-free environment.
About the Role What we're looking forWe're looking for a Backend Engineer (Senior level) specialized in Swift (Server-Side Swift) to lead the evolution of our core API, architect scalable services and ensure our payment infrastructure is fast, secure and resilient. You'll own the backend and have an active voice in technical and product decisions.
Responsibilities- Develop and evolve high-performance APIs using Swift (Vapor/Kitura)
- Design scalable, secure, microservices-oriented architectures
- Create robust integrations with payment gateways, anti-fraud and external providers
- Ensure testability, security, logs and observability (Sentry, Open Telemetry, Grafana)
- Optimize backend performance (concurrency, async/await, memory management)
- Implement security best practices (JWT, rate limits, idempotency, webhook signing)
- Create CI/CD pipelines (Git Hub Actions) and automate tests and deploys
- Collaborate with Product to transform requirements into clear, efficient features
- 4+ years of backend experience
- Solid experience with Swift server-side (Vapor, Kitura or equivalent)
- Proficiency in building REST APIs (authentication, versioning, documentation)
- Deep knowledge of concurrency, async/await, performance and memory safety
- Experience with relational databases (Postgre
SQL, MySQL) and query optimization - Mastery of CI/CD, versioning (Git) and cloud environments
- Familiarity with cloud infra (GCP, AWS or similar)
- Strong sense of ownership, autonomy and ability to solve complex problems
- Experience with Cloud Run / AWS Lambda
- Knowledge of Docker, containers and scalable infra
- Experience with payments, reconciliation, chargebacks or fintech in general
- Knowledge of Redis, queues and event-driven architectures
- Previous experience in fast-paced startups
Currently accepting applications from Brazil only
#J-18808-LjbffrPosition Requirements
10+ Years
work experience
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