API Developer

Role & responsibilities

API Developer

Experience:23 years

About the Role
Mid-size broking firm (mutual funds, broking, PMS, insurance, wealth, corporate financing) building and maintaining APIs that power our back-office, client-facing, and internal platforms. You'll design, build, and secure APIs, and integrate with exchanges, KYC providers, payment gateways, and internal systems.

Key Responsibilities

• Design, develop, and maintain **RESTful APIs** (.NET) for internal and client-facing applications
• Integrate with third-party services: exchanges, KYC/e-KYC providers, payment gateways, banking partners
• Write clean, testable code with proper error handling, logging, and input validation
• Implement API authentication/authorization (OAuth2, JWT, API keys)
• Work with **MSSQL** for data access — stored procedures, query optimization
• Write and maintain API documentation (Swagger/OpenAPI)
• Collaborate with QA and BA to translate requirements into API contracts

Required Skills

• 2–3 years hands-on experience building REST APIs (.NET/C# preferred)
• Strong SQL skills (MSSQL); understanding of relational data design
• Experience with API authentication standards (OAuth2, JWT)
• Familiarity with Git-based workflows (branching, merge requests)
• Understanding of API security basics (input validation, rate limiting, secure error handling)
• Ability to write and read Swagger/OpenAPI specs

Good to Have

• Experience integrating with stock exchange/market data or payment gateway APIs
• Exposure to BFSI/regulated environment and data security practices
• Basic knowledge of Flutter/mobile app API consumption patterns

Qualifications

• Bachelor's in CS/IT or equivalent experience