Harekrushna Mahapatra

Software Developer

Building scalable backend systems with expertise in Java, Spring Boot, and distributed architectures. Currently at Times Internet, working on high-traffic services serving millions of users.

Get In Touch Learn More

About Me

Passionate about building robust, scalable backend systems that power high-traffic applications

I’m a Software Engineer & an AI Generalist specializing in designing and scaling high-performance backend systems that handle millions of users daily. At Times Internet, I lead initiatives on mission-critical services such as the Comments platform (15M+ DAUs) and Unified Feed APIs, driving major gains in latency reduction, fault tolerance, and system throughput.

Previously at Paytm, I optimized and maintained microservices powering FinTech operations for 10,000+ field agents, streamlining workflows for loan disbursement, QR code validation, and geolocation-based verification.

I bring deep expertise in Java, Spring Boot, MySQL, MongoDB, Redis, and modern engineering practices with Docker, Jenkins, Apache Kafka, and ElasticSearch. My passion lies in building backend architectures that are not just fast, but unfailingly reliable and ready to scale.

15M+
Daily Active Users
10K+
Field Agents Supported
Noida, Uttar Pradesh, India
NIT Rourkela Graduate
Ranked Top 3% in Google Hash Code 2022
Backend Systems Expert
3⭐ at CodeChef
Hackathon Finalist

Work Experience

Building scalable systems across different domains

Dec 2024 - Present

Software Developer

Times Internet

Owned and scaled the Comments service for 15M+ DAUs across 6+ TIL apps with 99.99% uptime, optimized Unified Feed APIs to cut latency from 800 ms to < 70 ms, modernized GA ClickHouse pipelines reducing failures by 70%, and enhanced ad placement systems boosting engagement by 15–20%. Delivered multiple performance gains, including 30% faster content delivery, 40% lower analytics latency, and 90% reduction in stale news through automation and microservices.

Java Spring Boot MongoDB MySQL Redis (Pub/Sub, Streams) ElasticSearch ClickHouse Apache Kafka Kibana New Relic
Aug 2024 - Present

AI Training Coding Expert

Outlier (Freelance)

Applied prompt engineering to design and refine AI training data, using reasoning-based annotations to enhance task quality. Improved coding task instructions and evaluated exercises for accuracy, clarity, and alignment with rubrics.

Python Prompt Engineering Quality Assurance
Jun 2023 - Mar 2024

Software Engineer

Paytm

Improved the Revisit microservice for 10,000+ PSA app agents, streamlining loan disbursements and hardware validation. Built APIs for QR, OTP, and geolocation, reducing onboarding failures by 25%. Fixed NCMC and FASTag issues, boosting transaction success rates by ~20%.

Java Spring Boot MySQL Redis Jenkins Redash
Dec 2022 - Jan 2023

Machine Learning Intern

Department of EECS, IISER Bhopal

Implemented a model to classify eating disordered and non-disordered Twitter users based on their social status, behavioral patterns, and psychometric properties. View Project

Python Tweepy Pandas Scikit-learn NumPy
May 2022 - July 2022

Machine Learning Intern

Department of EECS, IISER Bhopal

Built an NLP-driven ambiguity detection tool for domain-specific PDFs, improving text classification accuracy by 18% over baseline and reducing false positives.

Python Flask Natural Language Processing (NLP)
March 2021 - May 2022

Subject Matter Expert, Advanced Mathematics

Chegg Inc. (Freelance)

Provided high-quality solutions and step-by-step explanations for complex mathematics problems, ensuring accuracy, clarity, and adherence to academic standards.

Graph Theory Probability & Statistics Discrete Mathematics Number Theory Calculus Linear Programming

Technical Skills

Technologies I work with to build robust backend systems

Backend Development

Java
Spring Boot
Python

Databases

MySQL
MongoDB
Redis
ClickHouse

DevOps & Tools

Docker
Jenkins
Apache Kafka
ElasticSearch

Projects

Crafted with Code

Project 1

ResQNet

It is a digital aid distribution platform designed to enhance the delivery of emergency relief, leveraging digital identity verification and geolocation-based beneficiary prioritization.

View Project →
Project 2

BanklessHub

A Comprehensive Micro-Finance Platform aimed at underbanked communities, providing seamless access to financial services such as loans, insurance, and savings accounts.

View Project →
Project 3

ML tool for software requirements

Created a tool which takes two corpus (PDFs) as input of different domains and analyzes the domain or context specific ambiguities in natural language text using neural word embeddings.

View Project →

Education

Academic background and certifications

National Institute of Technology, Rourkela

Integrated MSc in Mathematics and Computing (major)

2018 - 2023

BS-MS (5 years) program provided a strong foundation in advanced mathematics, algorithms, data structures, and computational problem-solving, bridging theoretical depth with practical software engineering skills.

National Institute of Technology, Rourkela

Bachelor of Technology in Electrical Engineering (minor)

2019 - 2023

Earned Minor in Electrical Engineering by fulfilling required credits through specialized courses.

Problem Solving (Intermediate)

HackerRank • Aug 2023

Credential ID: 74247CC7E7EE

Postman API Fundamentals Student Expert

Postman • Nov 2022

Credential ID: 6727cd05ec6e58181771327d

Hackathon Achievements

• Top 30 finalists - MedPiper Hackemist Hackathon 2022

• Top 40 participants - HackOn with Amazon 2021

Get In Touch

I'm always interested in discussing new opportunities and challenging backend projects

Availability

Open to new opportunities

Let's Connect

I'm passionate about building scalable backend systems and would love to discuss how my experience with high-traffic applications at Times Internet and Paytm can contribute to your next project.

15M+
Users Served
3K+
Connections
View Resume

Voice Assistant

Ready to help
You said:
Click the microphone to start...
Assistant:
Hi! I'm Harekrushna's voice assistant. Ask me about his experience, skills, projects, or contact information!
Ask me anything about Harekrushna!

Send me a message

Thank you! Your message has been sent successfully.
Something went wrong. Please try again.