Senior Back-End Developer

Position summary:

Chicago Apps is looking for a Senior Back-End Developer to join a small, steady team. You'll work mostly on server-side code: services, queues, databases and the glue between them. Little to no frontend work. The company is based in Chicago, the US. The team is distributed across several countries. Contract role, full-time hours, paid in USD at the end of each month. Core hours overlap with US Central time, 9:00 AM to 1:00 PM CT.

Job duties:

• Containerize services with Docker and deploy them to Kubernetes or ECS
• Secure endpoints with OAuth 2.0, JWT validation and proper input checks
• Design and build REST and gRPC APIs in Go, Java or Python
• Handle on-call for services the team owns and lead incident follow-ups

Skills and experience:

• Familiarity with Docker and CI/CD pipelines
• Experience designing and versioning HTTP APIs
• Understanding of concurrency, transactions, idempotency and retries
• Hands-on experience with AWS, GCP or Azure services
• Strong SQL and relational data modelling skills
• Proficiency in at least one of Go, Java, Kotlin, Python, C# or Node.js

What we offer:

Rate: CZK 145,000-CZK 180,000/month

• Long-term engagement
• Company laptop

The company:

Sellers use the platform to list used outdoor gear, and we handle payments, shipping labels and buyer protection. Revenue comes from a mix of advertising, affiliate commissions and a premium tier. Product reviews happen on Thursdays, with demos of whatever shipped that week.

The posting will close once we have a strong shortlist.

Duration: 6 months. Start: Immediately.

Demo job created on 11jobs for testing and demonstrations. It is not an actual opening at Chicago Apps, LLC.