Santosh Chakraborty
Software Engineering Manager | Principal Software Engineer | AI / LLM Architect Connect with me
About Me
Software Engineering Manager and Principal Software Engineer with 10+ years of experience building scalable backend platforms, distributed systems, and AI-powered enterprise solutions. Currently leading engineering initiatives at Darwinbox while independently architecting and developing AI/LLM platforms using open-source models and retrieval-augmented generation (RAG) pipelines.
Proven track record in building scalable APIs, data-processing pipelines, platform modernization, and engineering leadership. Experienced in designing AI-driven interview evaluation systems, transcript summarization engines, resume ranking systems, JD matching platforms, and enterprise AI assistants.
Core Skills
AI / LLM
Ollama
Qwen2.5
RAG
Embeddings
Vector Search
Prompt Engineering
Backend & Arch
PHP / Laravel
Python
Node.js
Microservices
Distributed Systems
REST APIs
Frontend
JavaScript
HTML5 / CSS3
Angular
REST API
Data & Search
MySQL / PostgreSQL
MongoDB
Redis
ElasticSearch
Vector Databases
Cloud & DevOps
AWS
Docker
Jenkins
GitLab CI/CD
RabbitMQ / Kafka
Professional Experience
AI / LLM Platform Architect
Covalid (Open-Source AI Platform)
2025 – Present
- Architected and independently developed an AI-powered interview evaluation and talent assessment platform using open-source LLM infrastructure.
- Built transcript summarization, interview feedback generation, resume ranking, and JD matching using RAG-based architecture.
- Integrated Ollama and Qwen2.5 models for fully local LLM inference without dependency on paid AI APIs.
- Designed prompt engineering pipelines to generate competency-based hiring feedback with evidence-backed recommendations.
- Implemented embeddings and vector-search-based retrieval pipelines for semantic candidate evaluation.
- Developed scalable backend services using PHP, Python, Redis, and MySQL for AI workflow orchestration.
Principal Software Engineer / Technical Lead
Darwinbox | Hyderabad
March 2023 – Present
- Lead a team of 10 software engineers building scalable HRMS platform services.
- Architect and develop high-performance backend services using PHP and microservices architecture.
- Drive system design decisions, scalability improvements, and backend refactoring initiatives.
- Build and maintain data processing pipelines and background workers handling enterprise datasets.
- Mentor engineers through code reviews, architecture discussions, and technical training.
Certifications
Awards
