We are looking for a skilled LLM API & Integration Engineer to design, build, and maintain secure, scalable APIs (custom tools/actions) that power our Enterprise GPT applications. This role bridges backend services and large language models (LLMs) to deliver intelligent, real-time business solutions across business

Key responsibilities :

- Design and develop APIs (RESTful/OpenAPI spec) to be used as custom tools in GPTs.

- Customize GPTs with MCP & Custom Tool calls

- Build secure, authenticated API endpoints for internal systems (e.g., Databricks (Delta lake), RAG Vector Indexes, SAP, document stores)

- Implement API documentation in OpenAPI/Swagger format for GPT integration.

- Build Custom Connectors using MCP

- Ensure robust logging, error handling, and observability in all APIs.

- Work with InfoSec and DevOps teams to ensure secure deployment and data protection.

- Support LLM prompt tuning and tool orchestration using the GPT builder or API interfaces.

Requirements :

- 5- 8 years of experience

- Strong Experience with Understanding of LLM-based architectures and how GPTs use tools/functions.

- Strong experience with RESTful APIs and OpenAPI/Swagger specifications.

- Experience integrating LLMs with enterprise systems (Databricks) and setting up RAG for unstructured data

- Knowledge of authentication protocols: OAuth2, API keys, JWT.

- Knowledge of data privacy, role-based access control (RBAC), and enterprise security best practices.

- Familiarity with Azure cloud services

Benefits :

What a Consulting role at Thoucentric will offer you?

- Opportunity to define your career path and not as enforced by a manager

- A great consulting environment with a chance to work with Fortune 500 companies and startups alike.

- A dynamic but relaxed and supportive working environment that encourages personal development.

- Be part of One Extended Family. We bond beyond work - sports, get-togethers, common interests etc. Work in a very enriching environment with Open Culture, Flat Organization and Excellent Peer Group.

- Be part of the exciting Growth Story of Thoucentric!

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