Backend Developer
South Korean blockchain technology company developing cross-chain infrastructure and DeFi protocols.
Maintainer signals as of 9/25/2026
About Ozys
Ozys is a South Korean blockchain company focused on connecting blockchain ecosystems through interoperability infrastructure, blockchain networks, node operations, and decentralized-finance products. Its publicly documented portfolio includes Orbit Chain, Orbit Bridge, KLAYswap, Meshswap, Belt Finance, Megaton Finance, and WTON Gateway.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
Design, develop, and operate backend systems supporting DeFi, wallet, and blockchain services. Process on-chain events, expose HTTP APIs, integrate SDKs and services, manage database migrations and ORMs, containerize services, and support reliable production operations.
Requirements
- Node.js and TypeScript web application development
- HTTP API development experience
- Third-party SDK, library, and API integration experience
- Database ORM usage and migration-writing experience
- Clear terminology definition and documentation skills
- Ability to learn new technologies
Responsibilities
- Develop and operate backend systems for DeFi, wallet, and blockchain services
- Collect and process blockchain events and transform them into service data
- Design and implement HTTP APIs
- Integrate third-party SDKs, libraries, and external APIs
- Write and manage database schema migrations using an ORM
- Containerize services and support deployment pipelines
- Identify and apply technical solutions to ensure service reliability
- Produce and maintain clear technical documentation
Benefits
- Full salary during the three-month probation period
- Portfolio submission is optional
Hiring Process
Application screening, coding test via Programmers with approximately one week to complete, final interview, and result notification.