Back to careers
Engineering
Backend Developer
Build reliable APIs and data systems that power Addiyon’s marketplace.
Engineering · full timeRemoteSeptember 19, 2026
About the role
As a Backend Developer, you will design, build, and operate the services behind Addiyon’s marketplace. You will work across TypeScript APIs, PostgreSQL data models, background processing, integrations, and production observability. You will collaborate with product and client engineers to turn marketplace needs into secure, maintainable systems and own changes from design through deployment.
What you will do
- Design and ship backend services using TypeScript, Node.js, and Fastify
- Model and optimize PostgreSQL data for correctness and performance
- Build secure APIs and integrations with clear validation and error handling
- Improve service reliability, monitoring, and production diagnostics
- Write maintainable tests and review code with other engineers
- Collaborate with product, web, and mobile teammates on end-to-end features
What we are looking for
- Strong practical experience with TypeScript and Node.js backend development
- Experience designing relational schemas and writing PostgreSQL queries
- Understanding of HTTP APIs, authentication, authorization, and application security
- Ability to diagnose production issues using logs, metrics, and systematic debugging
- Clear communication and ownership from technical design through delivery
- Experience with Fastify, object storage, queues, or marketplace systems is helpful
Equal opportunity
Addiyon considers applicants based on skills and role requirements. If you need a reasonable accommodation during the process, contact support@addiyon.com.