Mobile · Web · Full-Stack

I Build Apps & Websites
That Ship to Production

Full-Stack & Mobile Developer with 2+ years delivering iOS, React Native, Flutter & React/Next.js products for startups and enterprises. From blank repo to live product — I own the whole journey.

6+ Apps & Sites Shipped
2+ Years Experience
5 Platforms Covered
View Case Studies Book a Free Call
Rajeev Kumar – Full-Stack & Mobile Developer
iOS / Swift
React Native
Next.js
Flutter
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Full Capabilities

Tech Stack

Across mobile, web, and backend — not just one dimension.

iOS Native

SwiftSwiftUIUIKitMVVM CoreDataCombineXcodeTestFlight

Cross-Platform Mobile

React NativeExpoFlutterDart ReduxReanimatedEAS Build

Web Frontend

ReactNext.jsTypeScriptJavaScript HTML5CSS3Tailwind CSS

Backend & APIs

Node.jsExpressPythonJava Spring BootREST APIsSQLFirebaseStrapi

Tooling & DevOps

Git / GitHubJIRAFigmaPostman App Store ConnectPlay ConsoleAI Tooling

Working Style

Agile / ScrumScrum Master ✓Claude / Cursor GitHub CopilotCode ReviewsSolo → Production
Rajeev Kumar at work
Top 100 of 3,000 applicants
#1 Cohort UI/UX Rank

About Me

I Don't Just Build UI. I Ship Products.

I started writing Swift after being selected in the top 100 of 3,000 applicants for the Apple × Infosys iOS Developer Program — and finished it ranked #1 in my cohort for UI/UX. That trajectory carried into a startup where, as the sole mobile engineer, I've taken multiple client apps from empty repos to live production.

I build across the full stack: iOS (Swift/SwiftUI), React Native, Flutter on mobile, and React, Next.js, TypeScript on the web. On the backend, I connect it all with Node.js, REST APIs, Firebase, and Strapi. I've held a Java Full Stack certification (Spring Boot + SQL) and know how the data flows all the way through.

Whether it's a real-time WebSocket chat system, a Strapi-backed insurance app, or a responsive Next.js web product — I architect it, build it, and deliver it. I don't hand things off. I own them.

Sole Engineer, 3 Live Client Apps

Owned frontend architecture, API integration & deployment end-to-end — zero handoffs.

Top 100 / 3,000 · Ranked #1 @ Infosys

Apple × Infosys iOS Developer Program — out of thousands of applicants.

Mobile + Web + Backend

Swift · React Native · Flutter · React · Next.js · Node.js · Firebase · SQL

Download Resume (PDF)

My Journey

Experience & Education

Feb 2025 – Present

SDE-1 (Mobile & Web)

TechChefz Digital · Noida, UP

Full-Time
  • Sole frontend engineer for InsurUp (React Native/Expo) — UK insurance client. Built policy management, claims flow & Strapi CMS integration end-to-end.
  • Built PQ7 "Picklers" (React Native) — sports community app with WhatsApp-style real-time chat, multimedia feed & map-based discovery using WebSocket + FCM.
  • Shipped production features on DishTV Smart+ (Flutter) — an OTT platform serving a large active user base; integrated live streaming workflows & compliance UI.
  • Built The Food Advocate (React Native) — improved UI responsiveness by 50% through optimised FlatList rendering and component memoisation; integrated RESTful APIs for restaurant/food data.
  • Built Employee Timesheet & Project Allocation (Flutter) — end-to-end workforce management app with weekly time logging, project assignment, manager approval workflows, and exportable reports.
  • Delivered an ITC Hotels native SwiftUI prototype on a tight pre-sales timeline for a premium hotel chain client.
React NativeFlutterSwift/SwiftUIExpoFirebaseStrapiWebSocketFCM
Feb 2024 – Jul 2024

iOS Developer Intern

Infosys Ltd · Mysuru, KA

Internship
  • Selected in top 100 of 3,000+ applicants for the Apple × Infosys iOS Student Developer Program.
  • Built full iOS apps (Library Management, Smart Parking) in Swift & SwiftUI; integrated REST APIs with JWT auth & role-based access.
  • Ranked #1 in cohort for UI/UX — judged across all program participants.
  • Served as Scrum Master for a 10-member Agile team — ran sprint planning, standups & retrospectives.
SwiftSwiftUIUIKitREST APIsJWT AuthAgile/ScrumMapKit
Sep 2021 – May 2025

B.Tech, Computer Science & Engineering

Galgotias University · Noida, UP

CGPA 7.9
  • Completed Java Full Stack Development training — Spring Boot, SQL, REST APIs.
  • Led Photography Society — organized events, trained 150+ members.
  • Strong CS fundamentals: DSA, DBMS, OOP, OS, Computer Networks.
JavaSpring BootSQLPythonDSA

Case Studies

Featured Projects

Real problems. Concrete decisions. Measurable outcomes.

PQ7 Picklers Sports Community App
Full Case Study
Featured
React Native Cross-Platform · Sports / Social

PQ7 (Picklers) — Sports Community

Problem

Sports enthusiasts needed one app to find local players, schedule games, share moments & coordinate in real-time — not three separate tools.

My Role

Sole mobile engineer. Owned full app from architecture through both platform app store submissions.

Architecture

React Native · WebSocket (real-time chat) · Firebase Storage (media) · Maps SDK (location) · FCM push notifications · EAS Build pipeline.

Outcome

Chat latency under 200ms. Passed App Store & Play Store review on first submission. Shipped to both iOS & Android simultaneously.

React NativeWebSocketFirebaseFCMMaps SDKEAS
InsurUp Insurance App
Full Case Study
Featured
React Native / Expo Cross-Platform · InsurTech · UK Client

InsurUp — Insurance Platform

Problem

UK insurance startup needed a mobile product to let customers manage policies and file claims — fast, without a dedicated backend team causing bottlenecks.

My Role

Lead mobile engineer. Owned app architecture, all Strapi CMS integration, UI system, Redux state management & deployment pipeline.

Architecture

React Native + Expo · Strapi CMS (REST) · JWT Auth · Redux Toolkit · AsyncStorage offline cache · EAS Build + TestFlight distribution.

Outcome

Full v1 delivered in 6 weeks. Zero critical regressions on launch. Client extended engagement for v2.

React NativeExpoStrapiReduxJWTTestFlight
DishTV Smart+ OTT Flutter App
Flutter Production Scale · OTT / Entertainment

DishTV Smart+ — OTT Platform

Contributed core UI features, live streaming workflows & compliance screens to India's DishTV Smart+ OTT Flutter app — a production-scale platform handling millions of sessions. Delivered under strict editorial & performance review cycles.

FlutterDartLive StreamingFirebasePerformance Tuning
The Food Advocate App
React Native Cross-Platform · Food & Discovery

The Food Advocate

Food discovery & community platform built in React Native. Improved UI responsiveness by 50% through optimised FlatList rendering, memoised components and reduced re-render cycles. Integrated RESTful food data APIs with a clean, component-driven architecture.

React NativeExpoREST APIsFlatList Optimisation
Employee Timesheet & Project Allocation Flutter App
Flutter Cross-Platform · Enterprise · HR & Project Mgmt

Employee Timesheet & Project Allocation

End-to-end workforce management Flutter app for tracking employee hours, allocating staff across projects, and managing approval workflows. Features a weekly time-log grid, project assignment dashboard with capacity heat-maps, manager approval queue, and exportable PDF/CSV reports — all synced in real-time with a REST backend.

FlutterDartREST APIsPDF ExportRole-Based AccessReal-Time Sync
Library Management iOS App
iOS Native SwiftUI · Role-Based · Infosys Project

Library Management — iOS

Role-based SwiftUI app with JWT Auth for admin, librarian & student roles. REST API integration for real-time book catalogue, borrowing system & overdue alerts. Delivered as lead iOS developer — ranked #1 for UI/UX in cohort review.

SwiftSwiftUIREST APIJWT AuthMVVM
Smart Parking App
iOS Native Swift · Location-Based · Utility

Smart Parking — iOS

Pre-booking & real-time slot availability app with MapKit integration. Reduced average parking search time by ~50% in user testing through predictive recommendations & live availability feeds.

SwiftUIKitMapKitREST APIs
React / Next.js Web Development
React · Next.js Web Full-Stack · TypeScript

Web Apps — React & Next.js

Built responsive web applications using React, Next.js & TypeScript alongside mobile projects. Experienced with server-side rendering, API routes, Tailwind CSS, and integrating shared backend services (Firebase, REST APIs) across both web and mobile surfaces.

ReactNext.jsTypeScriptTailwind CSSNode.jsREST APIs
Enquire for demos
ITC Hotels SwiftUI Demo
iOS Native SwiftUI · Pre-Sales Prototype · Hospitality

ITC Hotels — SwiftUI Prototype

High-fidelity native iOS prototype for a premium hotel chain, built solo under a tight pre-sales deadline. Showcased room booking, concierge services & loyalty points with polished SwiftUI transitions & animations that helped win the client.

SwiftUIAnimationsPrototypePre-Sales

What I Offer

Services & Packages

Clear scope per category — no vague "can you build me an app" conversations.

iOS App Development

Native Swift/SwiftUI from architecture to App Store submission — including push notifications, background tasks & TestFlight distribution.

  • Swift / SwiftUI / UIKit
  • MVVM + Clean Architecture
  • App Store Submission + Review Support
  • Push Notifications (APNs)
Enquire
Most Popular

Cross-Platform App

One codebase, both platforms. React Native or Flutter shipped to iOS & Android simultaneously with native-feel performance.

  • React Native / Flutter / Expo
  • iOS + Android Deployment
  • Real-time (WebSocket / FCM)
  • Offline Sync & Caching
Enquire

Web App Development

Fast, SEO-ready web apps & dashboards in React / Next.js + TypeScript. From landing pages to full-featured SaaS portals.

  • React / Next.js / TypeScript
  • Tailwind CSS + Responsive Design
  • SSR / SSG / API Routes
  • Firebase / REST API Integration
Enquire

API & Backend Integration

Wire your mobile or web app to any backend — REST APIs, Firebase, Strapi CMS, auth flows, real-time data & third-party SDKs.

  • REST / GraphQL / Firebase
  • JWT / OAuth 2.0 Auth
  • Strapi / Headless CMS
  • Payment & Map SDK Integration
Enquire

My Process

How I Work

Predictable delivery, zero surprises.

01

Discovery Call

30-min call to understand your product, users, timeline & budget. I ask the questions that save weeks of rework later.

02

Architecture & Proposal

Tech stack, platform strategy, milestones & scope — documented. You approve before a single line of code is written.

03

Agile Sprints

2-week sprints with real demo checkpoints. You see running software, not status-update slides.

04

QA & Launch

Cross-device testing, App Store / web deployment, and a clean handoff with docs so your team can own it confidently.

Why Work With Me

Trust Signals

Apple × Infosys Certified

Selected top 100 / 3,000+ applicants. Ranked #1 in cohort for UI/UX.

6+ Apps & Sites in Production

InsurUp, PQ7, DishTV Smart+, Food Advocate, Library App, Smart Parking, ITC Hotels.

Mobile + Web + Backend

I cover all three layers — you don't need to hire three people.

<24h Response

You'll never wait days for an update on your own project.

Currently Available

Open to full-time roles & freelance projects starting immediately.

AI-Augmented Velocity

I use Claude, Cursor & Copilot to ship faster — with code review discipline to keep it clean.

Let's Build Together

Start a Conversation

A project in mind, a role to fill, or just want to say hi — reach out below.

Prefer direct contact?

Email rajeevchoudhary766@gmail.com
Call +91 76672 75008
LinkedIn linkedin.com/in/rajeev7kumar
GitHub github.com/rajeev766
WhatsApp Message me directly
Noida, UP, India · Available Remotely Worldwide

Social Proof

What People Say

From colleagues and clients who've worked with me directly.

"Rajeev delivered the entire InsurUp mobile app as a solo engineer — from scratch. He asked the right questions upfront, kept us updated every sprint, and shipped a polished v1 in 6 weeks. The code was clean enough that our backend team could maintain it without a handoff doc."

Arjun Mehta

Arjun Mehta

Product Manager · TechChefz Digital

"I've rarely seen an intern pick up SwiftUI this fast. Rajeev wasn't just writing code — he was thinking about UX, architecture, and how it fits the user flow. His Library Management app was honestly the best-designed project in our entire cohort. Ranked #1 for a reason."

Sarah Mitchell

Sarah Mitchell

Technical Lead · Infosys iOS Program

"We needed the PQ7 sports app built fast — cross-platform, real-time chat, maps, the whole thing. Rajeev handled it all. No drama, no excuses. He explained every technical decision clearly, which made reviews simple. It passed App Store review on the first try."

Omar Hassan

Omar Hassan

Founder · PQ7 Sports App

Testimonials reflect real working relationships. LinkedIn recommendations available on request.

Writing & Thoughts

Technical Articles

I write about mobile architecture, cross-platform tradeoffs, and the developer workflow — from real project experience.

Zero Commitment

Book a Free 30-Min Discovery Call

Got a project idea or a role to discuss? Let's spend 30 minutes figuring out if I'm the right fit. No sales pitch — just an honest conversation.

  • Ask me anything about your project
  • Get a rough effort estimate on the spot
  • No obligation whatsoever
Book a Free Consultation Chat on WhatsApp

Usually responds within 2–4 hours · IST timezone