Mrinmoy Saha

Backend Software Engineer

Kolkata, India 3+ yrs exp 86 · Excellent

About

Backend Software Engineer with 2.5+ years of experience building scalable microservices and database systems. Passionate about DSA, distributed systems, enthusiastic about AI and actively learning and integrating LLM-based agentic workflows and RAG pipelines.

Skills & Expertise (41)

GitHub Advanced

8.0/10

2.5

Years Exp

Git Advanced

8.0/10

2.5

Years Exp

AWS Advanced

8.0/10

2.5

Years Exp

Python Intermediate

7.5/10

2.5

Years Exp

FastAPI Intermediate

7.0/10

Years Exp

RESTful APIs Intermediate

7.0/10

2.5

Years Exp

S3 Intermediate

7.0/10

Years Exp

Docker Intermediate

7.0/10

Years Exp

MySql Intermediate

7.0/10

2.5

Years Exp

SQL Intermediate

7.0/10

2.5

Years Exp

Flask Intermediate

7.0/10

2.5

Years Exp

Django Intermediate

7.0/10

2.5

Years Exp

Postgresql Intermediate

7.0/10

Years Exp

EC2 Intermediate

6.0/10

Years Exp

Data Structures & Algorithms Intermediate

6.0/10

Years Exp

Lambda Intermediate

6.0/10

Years Exp

System Design Intermediate

6.0/10

Years Exp

CloudFront Intermediate

6.0/10

Years Exp

Java Intermediate

5.0/10

Years Exp

Multi-tenant Architecture CN OS DBMS OOPs RAG Figma Generative AI LLM Integration Jira LangGraph OpenAI API Redis Celery WebSockets Secrets Manager Elastic Beanstalk CloudWatch Cognito JavaScript CSS HTML

Work Experience

Junior Developer

Utah Tech Labs

Jan 2024 - Present

Led the architecture and optimization of multi-tenant backend systems using Flask and Django containerized with Docker on AWS Elastic Beanstalk; designed optimized SQLAlchemy/MySQL schemas and integrated SAP ERP systems, slashing query latency by 25%. Engineered high-performance lead ingestion pipelines in FastAPI and PostgreSQL featuring SHA256-based contact deduplication; optimized Celery background worker processes by implementing an in-memory cache for lead preference embeddings, cutting OpenAI token costs by 40%. Co-developed a real-time voice chatbot pipeline integrating FastAPI, WebSockets (wss://), and the Vonage Voice API to stream low-latency bidirectional audio; applying socket pre-warming to cut conversational latency by 35%. Mentored 5+ software engineering interns on RESTful API standards, unit testing, and Git workflows, speeding up developer onboarding by 30%; collaborated with cross-functional stakeholders to define architecture blueprints and project requirements.

Trainee Software Developer

Utah Tech Labs

Aug 2023 - Jan 2024

Engineered a secure OTP authentication service using Flask and SQLAlchemy/MySQL integrated with Twilio SMS API, incorporating used-state tracking and a 15-minute TTL verification window to prevent replay attacks. Decoded 100+ legacy REST endpoints from undocumented Swagger to build middleware bridging a legacy Claris FileMaker Data API backend with a React Native app (Safety Wallet), accelerating development by 30%.