Priyanshu Kumar

Associate Software Engineer @ Cognivac

Open to new opportunities

Full-stack engineerbuilding products fromdatabase to interface.

I design and ship web and mobile applications with React, Next.js, Spring Boot and FastAPI, owning features end to end from the schema and API to the interface people use. I also build products at Krixen.

See selected work Download résumé

trace · request lifecycle200 OK

InterfaceReact · Next.js · TypeScript01
APISpring Boot · FastAPI · JWT02
DataPostgreSQL · MySQL · Supabase03

→ owned end to end: schema, API, UI

→ avg. API response time −30% after optimization

DSA problems solved on LeetCode & HackerRank: 450+
REST APIs designed and secured at Cognivac: 20+
HackerRank rating in Java and MySQL: 5★
Place in a university-level hackathon: 1st

01Selected work

Products I've designed, built and shipped.

Live products, from recruiting tools to AI-assisted health tracking. Open any case study to walk through every screen, feature and stack decision.

01Recruitment SaaS· 2026

HireCheck

A technical assessment platform where recruiters create timed tests, invite candidates and review scores, and candidates take proctored tests.

React
TypeScript
Spring Boot
PostgreSQL
+4

Problem: Recruiters need one place to run timed technical assessments, invite candidates and review results, and they need to trust that the scores are honest.
What I built: The full product, end to end: a React + TypeScript dashboard, a Spring Boot API with JWT auth on PostgreSQL, and a proctored test flow, shipped as a single Docker image.
Stack: React
TypeScript
Spring Boot
PostgreSQL
JWT
Zod
Docker
Railway

Visit live site Source code

02AI · Health & Fitness· 2025

FoodCal

An AI-powered nutrition and fitness tracker that analyzes food photos to estimate calories and macros in real time.

Next.js
Supabase
Python
OpenCV
+3

Problem: Manually logging meals is tedious enough that most people give up. Tracking needs to take seconds, not minutes.
What I built: A Next.js PWA with Supabase for auth and real-time data, plus a Python and computer-vision pipeline using OpenCV, Gemini and OpenAI for food recognition.
Stack: Next.js
Supabase
Python
OpenCV
Gemini
OpenAI
PWA

Visit live site Source code

03Productivity tool

File Forge

An all-in-one document platform for file conversion, PDF generation and compression.

Next.js
Supabase
PDF processing
File conversion
+1

Problem: Everyday document tasks like converting, merging or compressing are scattered across ad-heavy single-purpose sites.
What I built: A Next.js platform with a suite of PDF and image tools covering conversion, merge and split, compression and generation, all in one fast interface.
Stack: Next.js
Supabase
PDF processing
File conversion
Cloud storage

Visit live site Source code

More projects

Swipe · 6 projects

Machine learning
ML Disease Detection
A machine-learning diagnosis system that predicts diseases and recommends drugs.
Food ordering
INNFOODIE
A React food-ordering platform with a dynamic menu system and order tracking.
Commerce
Silk B2C Website
A B2C commerce platform integrated with WhatsApp for customer communication and delivery.
Business SaaS
Gym Management System
Gym management software for member records, payments and sales analytics.
Data visualization
Weather Forecast App
A weather app with 5-day forecasts, charts and conditions-aware theming.
Portfolio
Personal Website
A personal website showcasing projects and technical expertise.

04
ML Disease Detection
A machine-learning diagnosis system that predicts diseases and recommends drugs.
Machine learning
05
INNFOODIE
A React food-ordering platform with a dynamic menu system and order tracking.
Food ordering
06
Silk B2C Website
A B2C commerce platform integrated with WhatsApp for customer communication and delivery.
Commerce
07
Gym Management System
Gym management software for member records, payments and sales analytics.
Business SaaS
08
Weather Forecast App
A weather app with 5-day forecasts, charts and conditions-aware theming.
Data visualization
09
Personal Website
A personal website showcasing projects and technical expertise.
Portfolio

02About

I care about the whole product, not just my layer of it.

Priyanshu Kumar

Associate Software Engineer

Noida, India

I'm an MCA graduate and full-stack developer who builds scalable, production-grade web and mobile applications. I work as an engineer at Cognivac, run Krixen, and build business-driven software for freelance clients.

I enjoy solving complex problems with clean, efficient code: turning requirements into sound data models, secure APIs and interfaces that feel fast. I work in Agile teams with Jira, ClickUp and Slack, and keep codebases healthy with Git, GitHub and GitLab. Outside of shipping, I keep my fundamentals sharp, with 450+ data-structure and algorithm problems solved so far.

Currently

Associate Software Engineer at Cognivac

Also

Founder of Krixen · Freelance developer

Education

MCA (Data Science), Babu Banarasi Das University · 2023–25

BCA, Shri Ramswaroop Memorial University · 2020–23

Practices

Low-level design, OOP, MVC, clean code, Agile

Based in

Noida, India

How I can help

Start a project →

01
Full-stack web apps
Scalable web products with React / Next.js on top of robust backend APIs.
Next.js · Spring Boot · FastAPI · PostgreSQL
02
Backend & API engineering
Clean-architecture APIs with authentication, performance and reliability built in.
Java · Python · REST · Docker
03
Mobile & cross-platform
Responsive, high-performance app interfaces and mobile-ready workflows.
React Native · Firebase · Supabase · CI/CD

03Experience

Where I've been building.

Product engineering in a team, alongside my own ventures and client work. Full résumé

Cognivac
May 2025 — Present
Associate Software Engineer
Building and maintaining full-stack web and mobile applications across frontend, backend and database layers.
apps shipped
5+
secured APIs
20+
end-to-end features
15+
faster responses
~30%
- Developed and maintained full-stack web and mobile applications with Next.js and React.js, improving feature delivery speed and user experience.
- Designed and secured RESTful APIs in Spring Boot and FastAPI with JWT authentication.
- Integrated third-party APIs, including Reddit APIs and Devvit applications, for workflow automation and real-time data sync.
- Optimized API and database performance, cutting average response times by roughly 30%.
- Worked in Agile teams across sprint planning, code review, CI/CD, testing and deployment.
- Next.js ·
- React ·
- Spring Boot ·
- FastAPI ·
- JWT ·
- Devvit
Krixen
2024 — Present
Founder & Builder
Leading product direction from idea validation to deployment.
- Built internal product systems and reusable development workflows.
- Led product direction from idea validation through to deployment.
- Streamlined development velocity with component-first engineering.
- Next.js ·
- Supabase ·
- Python
Independent
2023 — Present
Freelance Full-Stack Developer
Designing and shipping SaaS and MVP products for startups and local businesses.
- Owned architecture, implementation, deployment and post-launch support.
- Focused on speed, scalability and conversion-driven UX.
- React ·
- Supabase ·
- PostgreSQL