BackEnd Developer

We're building scalable, production-grade systems and need a backend developer who takes ownership, writes clean code, and ships things that work. Must Have: Proven production backend experience — REST APIs, WebSockets, scalable systems Clean, maintainable code following SOLID principles Hands-on Supabase experience Proficiency in at least one backend framework: JS/TS: Node / Bun Java/Kotlin: Spring Boot Go: Gin, Echo, or Fiber SQL (PostgreSQL, MySQL) and NoSQL (MongoDB) Solid understanding of DB design, indexing, migrations, query optimization, and ORMs/ODMs Auth & Security: JWT, OAuth 2.0, session-based auth, RBAC/ABAC Experience integrating third-party APIs and webhooks Testing: unit, integration, and end-to-end Git workflows, Docker, CI/CD (GitHub Actions / GitLab CI), Postman, Swagger/OpenAPI Nice to Have: Firebase · Redis/Memcached · RabbitMQ · Kafka · AWS SQS/SNS · GraphQL · AWS/GCP/Azure · Terraform · Microservices/gRPC · Prometheus · Grafana · OpenTelemetry · Datadog · Sentry · Elasticsearch · Meilisearch · Stripe/PayPal · React/Flutter · Open-source contributions What We Value: Strong problem-solving skills Ownership mentality — you take things to the finish line Clean architecture and code quality Ability to work independently Product-focused thinking Please note: This role may begin as a probationary or trial period, but is a direct pathway to a full-time position at Seron Labs. We're looking for someone ready to commit and grow with us long-term.