Hymavathi Bellamkonda

API Developer with 4+ years of experience building, securing, and managing enterprise-grade APIs using IBM API Connect and IBM Sterling B2B Integrator. Strong background in API lifecycle management, security enforcement, B2B workflows, and integration with complex banking systems. Skilled in delivering scalable, secure, and high-performance API solutions in fast-paced environments.

System Engineer - Tata Consultancy Services (TCS) - Hyderabad

(2022-03)

API Developer with expertise in IBM API Connect and B2B Integration using IBM Sterling Integrator

• Designed and developed REST/SOAP APIs with GET, POST, PUT, DELETE operations.
• Built and maintained OpenAPI/Swagger specifications and managed full API lifecycle.
• Implemented OAuth 2.0, API Keys, Basic Auth, JWT, SSL/TLS for secure API communication.
• Created and published API Products, Plans, and Catalogs with rate limits.
• Developed API assemblies including transformations, validations, and request/response mappings.
• Configured TLS client/server profiles and backend connectivity.
• Managed Developer Portal, consumer onboarding, subscriptions, and API exposure.
• Monitored API performance using API Analytics, improving reliability and response times.
• Implemented payload encryption and hashing for sensitive data.
• Provided UAT/production support, resolving validation, connectivity, and performance issues.
• Designed and maintained BPML workflows for high-volume B2B file transfers.
• Built reusable maps for Flat File, Positional, XML, and CSV transformations.
• Implemented secure communication via SFTP, FTPS, IBM MQ, HTTPS.
• Integrated with downstream core banking and payment systems using MQ/REST/SOAP.
• Performed canonical XML/EDI transformations with schema validation and partner-specific rules.
• Collaborated with security teams to fix vulnerabilities and strengthen API security posture.

B.Tech - Computer Science & Engineering - BVSR Engineering College, Chimakurthy (2016 - 2020)