Looking for a job

Oshan Yellana Ranasinghe

@oshanyellanaranasing

Message

I build traceable LLM, agentic AI, and production backend systems.

Sri Lanka

Message

What I'm looking for

I'm looking to build production-oriented AI applications and backend systems where I can work on LLMs, retrieval, agent workflows, evaluation, observability, and traceable system design.

I've built distributed AI systems at CodeGen International, including end-to-end tracing for a Java and Python multi-agent orchestration framework with 10–12 interacting agents. I also developed retrieval-augmented reservation components using Weaviate, LLM services, and PostgreSQL-backed workflows.

Across DeepFeed AI, research-paper analysis, conversational AI, and semantic multi-agent projects, I build systems with explicit state, evaluation, persistence, and observability. My work combines Python, FastAPI, LangGraph, PostgreSQL/pgvector, RabbitMQ, Celery, and OpenTelemetry to make grounded AI applications inspectable and production-oriented.

Experience

Work history, roles, and key accomplishments

AI Engineer Intern

CodeGen International

Jul 2024 - Jan 2025 (6 months)

Implemented end-to-end distributed tracing for a multi-agent orchestration framework using OpenTelemetry, Jaeger, and Grafana. Built and evaluated autonomous-agent prototypes and retrieval-augmented application components.

OpenTelemetry Jaeger Grafana Python Java RabbitMQ gRPC Weaviate PostgreSQL Docker Kubernetes GitLab CI CD

Back-End Developer

Treeloq

Nov 2019 - Mar 2023 (3 years 4 months)

Built backend and full-stack applications using Node.js, Express.js, MongoDB, React, and REST APIs. Designed authentication, database models, and third-party integrations, and implemented AWS Lambda-based serverless workflows.

NodeJS ExpressJS MongoDB React REST APIs AWS Lambda Puppeteer

Education

Degrees, certifications, and relevant coursework

University of Ruhuna

B.Sc. (Eng), Computer Engineering

2021 -

Activities and societies: Chairman, IEEE Computer Society Student Branch, University of Ruhuna (Feb 2025 – Jan 2026); Best Software Project – Fingerprint-Based Attendance Record System, Faculty of Engineering, University of Ruhuna (2025).

Pursuing a B.Sc. (Eng) in Computer Engineering, with expected completion in 2026.