Available for the right opportunity

Building reliable
systems that scale.

I'm Sagnik Mitra, a Senior Product Engineer at TCS focused on backend engineering, APIs, data processing and financial technology.

Explore my work ↗ Let's connect

GitHub ↗ LinkedIn ↗ Email ↗

profile.py ● online

class Engineer:
    focus = [
        "backend systems",
        "API engineering",
        "data & SQL",
        "financial technology",
    ]

    stack = {
        "python": "FastAPI",
        "java": "Spring Boot",
        "data": "SQL / Pandas",
    }

    def build(problem):
        return solution.solve(problem)

BackendEngineering

APIsFastAPI · Spring Boot

DataSQL · Python · Pandas

FinTechProduct Engineering

About

I enjoy turning complicated business requirements into clean, dependable software.

I currently work as a Senior Product Engineer at TCS, working primarily across Python-based product development and backend systems.

My work includes building APIs with FastAPI, working with SQL and data processing, and contributing to Java Spring Boot services when the problem calls for it.

I care about practical engineering: understandable code, predictable APIs, efficient data flows and software that holds up beyond the first demo.

Experience

Senior Product Engineer

Tata Consultancy Services (TCS)

Current

Develop backend and product functionality using Python, with a focus on maintainable services and APIs.
Build and integrate REST APIs using FastAPI and work with relational data through SQL.
Contribute to Java Spring Boot development where product requirements span multiple backend technologies.
Work on financial technology and reporting-oriented product capabilities, translating business requirements into software solutions.

PythonFastAPISQLJavaSpring Boot

Selected Work

01Professional / Private

Financial Report Generator

A reporting workflow that transforms structured financial data into polished HTML and PDF reports, with dynamic sections, tables, charts, portfolio cards and document-level formatting.

PythonHTML/CSSPDFData Processing

Built as part of professional product engineering work.

02Backend

API & Data Services

Backend services designed around REST APIs, relational data and business rules, with an emphasis on clear interfaces and reliable data transformation.

PythonFastAPISQLREST

Selected engineering experience; implementation details kept private.

03This website

Personal Engineering Portfolio

A lightweight, responsive portfolio built as a static site so it can be hosted directly through GitHub Pages with no server required.

HTMLCSSJavaScriptGitHub Pages

Open to adding public projects and repositories here.

Technical Toolkit

Languages

Python · Java · SQL · JavaScript

Backend

FastAPI · Spring Boot · REST APIs

Data

SQL · Pandas · NumPy · Data Processing

Engineering

API Design · Debugging · Integration · Reporting Systems

Let's build something useful.

If you're hiring for backend, product engineering or software roles, I'd be happy to connect.

Email me ↗ LinkedIn ↗

Building reliablesystems that scale.