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✅ Top Rated Plus | 100% JSS | 4x Certified (AWS SA Pro, GCP Pro Architect, Snowflake) | BITS Pilani MTech Data Science | Full Stack Developer & Data Engineer | React, Python, Node.js, Spark | $20K+ earned | 1,845+ hours I build full-stack web applications and data engineering systems that go to production, not to demo day. SaaS MVPs, Spark-based ETL pipelines, cloud architecture on AWS and GCP, I handle both the application layer and the data infrastructure behind it. 🔹 Full-Stack SaaS & Web Application Development React, Next.js, Node.js, and Python backends for SaaS platforms, dashboards, internal tools, and customer-facing apps. MVP to production on AWS/GCP with CI/CD, automated testing, and monitoring from day one. 19 Upwork contracts delivered with structured milestones. 🔹 Data Engineering & ETL Pipeline Architecture End-to-end data pipeline design with Apache Spark, PySpark, Scala, Snowflake, and Airflow. Batch and streaming ETL processing millions of records per run. Data lake architecture, warehouse modeling, analytics-ready output layers. 8+ years building production Spark + Cassandra systems at enterprise scale. 🔹 Cloud Architecture & Infrastructure (AWS + GCP) 4 cloud architecture projects on Upwork, all rated 5.0. $2,300 CloudStack design. AWS architecture advisory. EC2, Lambda, S3, RDS, EMR, Redshift on AWS. BigQuery, Dataflow, Cloud Functions on GCP. Terraform for IaC, Docker and Kubernetes for orchestration, zero-downtime deployments. 🔹 API Development & Backend Systems REST API and GraphQL backends with Node.js, NestJS, FastAPI, and Django. Microservices, Redis caching, WebSocket integrations, Stripe payment APIs, OAuth/JWT authentication. Backend services handling concurrent users at production scale. 🔹 Database Design & Data Modeling PostgreSQL, MongoDB, MySQL, Cassandra, DynamoDB, Redis. Schema design, query tuning, indexing, partitioning. Star and snowflake schemas, slowly changing dimensions, SQL optimization for analytics. Architecture decisions balancing performance, throughput, and cost. 🔹 AI Integration & Intelligent Applications OpenAI API, Hugging Face, NLP pipelines, chatbot systems, text extraction and summarization. Delivered NLP processing on Upwork. AI-powered features built into SaaS products as production features, not standalone experiments. 🔹 Real-Time Processing & Event-Driven Systems Kafka for event-driven architectures, change data capture, WebSocket dashboards, streaming pipelines for near-real-time analytics. Application events connected to data warehouse layers. 🔹 Frontend Performance & TypeScript Engineering React and Next.js with SSR/SSG for SEO-friendly rendering. TypeScript full stack. Core Web Vitals optimization, Tailwind CSS, responsive design. Fast-loading frontends that rank and convert. 🔹 DevOps, CI/CD & Production Systems Docker, Kubernetes, Terraform, GitHub Actions, GitLab CI. Serverless with AWS Lambda and GCP Cloud Functions. Monitoring, logging, alerting for production. Zero-downtime deployment strategies. 🔹 Technical Consulting & Architecture Advisory TypeScript and AWS Lambda tutor on Upwork, rated 5.0 over 13 hours. Cloud migration advisory, system design review, code audits, performance optimization, engineering mentorship. 📊 AWS Solutions Architect Professional + Associate (Dec 2026) | GCP Pro Cloud Architect (Jul 2026) | Snowflake Core (Jan 2026) 📊 MTech Data Science, BITS Pilani, ranked top 5 engineering institutions in India 📊 19 contracts, 100% JSS, Top Rated Plus, 1,845+ hours tracked, $20K+ earned 📊 "Jay's expertise brought the architecture design to life in ways I hadn't imagined" (5.0 rated) 📊 8+ years: React, Node.js, Python, Java, Scala across SaaS, healthcare, fintech, enterprise → Day 1: Requirements call + architecture proposal with tech stack rationale → Week 1: Sprint development, daily Loom/Slack updates, working code shipped → Ongoing: Weekly demos, priority reviews, transparent tracking, full documentation → Delivery: Documented code, CI/CD configured, deployment guide, 2-week post-launch support Full Stack: React, Next.js, Node.js, NestJS, Express, TypeScript, JavaScript, Python, FastAPI, Django Data: Apache Spark, PySpark, Scala, Snowflake, Airflow, Kafka, ETL, dbt, SQL, BigQuery Cloud: AWS (Lambda, EC2, S3, RDS, EMR, Redshift), GCP (BigQuery, Dataflow), Docker, Kubernetes, Terraform DB: PostgreSQL, MongoDB, MySQL, Redis, Cassandra, DynamoDB, Supabase AI: OpenAI API, Hugging Face, NLP, LLM Integration, TensorFlow, PyTorch 💬 Message me with your project scope or data challenge. I respond within 4 hours with a free assessment and can start within 48 hours.

I design and build scalable web applications that are fast, reliable, and built to grow. With 8 plus years of experience, I help startups and growing businesses turn ideas into production ready software. From architecture to deployment, I focus on clean code, performance, and long term maintainability. My core expertise includes: React and Next.js frontends Java Spring Boot and Rust backend systems REST and GraphQL APIs PostgreSQL and MongoDB AWS, Docker, Kubernetes I take ownership, communicate clearly, and build systems that support real business growth. If you need a developer who thinks beyond just writing code, let’s connect.

Hey there 👋 I’m Aditya, a Full-Stack Software Developer (Scala Play, React, PostgreSQL) with over 3 years of freelance experience, currently working full-time at Apple. I love building end-to-end systems that not only work, but think. My recent focus is on integrating Agentic AI into real-world products — enabling apps to take intelligent actions, automate workflows, and make smarter decisions on their own. 🧠 What I Can Help You With: Full-Stack Web Development (Scala Play, React, Node.js, Express, PostgreSQL, MongoDB) AI Integrations (OpenAI API, LangChain, RAG, autonomous agents) Backend Engineering (Scalable APIs, Database Design, Microservices) Automation & Tools (Web scraping, Data pipelines, AI-driven assistants) Cloud Deployments (AWS, GCP, Docker, CI/CD pipelines) 🧩 Why Clients Work With Me: 4+ years of freelance experience - I understand scope, delivery, and communication. Strong technical depth - I don’t just code features; I design systems. I balance practical business goals with clean, maintainable code. Friendly, reliable, and always proactive about making things simpler for you. Whether you need an extra pair of hands for a sprint or someone to build your entire product, I can help you get it done, the right way. Let’s build something that scales 🚀

Optimistic, forward-looking software developer with 3+ years' background in creating and executing innovative software solutions. I have worked on Data Science, Big Data, and have experience to handle a huge amount of data. - I'm experienced in Python, Pandas, Scikit learn. - I'm experienced in Spark, Scala, Hive, HDFS. - I'm experienced in Docker and Kubernetes. - I have a good data handling skill. - Design before Code, Always!

✵I was contributing in Cisco's project as a senior software developer. ✵I’m a developer with experience in building website's backend for small, medium and large scaled sized businesses. Whether you’re trying to win work, list your services or even create a whole online store, cloud or backend with complex logic with distribution system, I can help! ✵I’m experienced in Golang, Scala, Docker, Kubernetes, CI/CD, AWS, Openshift and Akka. ✵I'm expert in to handle and process large scale of data GB's ✵I've knowledge of python as well. ✵I’ll fully manage your project for the duration. Regular communication is really important to me, so let’s keep in touch!” Also, It's important for me to build excellent long-term relationships with clients, so I'm primarily looking for long-term projects. I look forward to hearing from you!

🌟 Top-Rated Flutter Developer | Mobile App Developer | Firebase Expert | Fintech Apps 💰 $25.00/hr ‼️ 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐍𝐨𝐰 ‼️ 🏆 𝟏𝟓+ 𝐘𝐞𝐚𝐫𝐬 in IT (7+ years in Flutter) 📱 200+ 𝐀𝐩𝐩𝐬 Delivered for iOS & Android 💎 𝟏𝟎𝟎% 𝐂𝐥𝐢𝐞𝐧𝐭 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧 & Repeat Projects ⭐ 𝟱-𝘀𝘁𝗮𝗿 Rated by Global Clients 🌍 Expertise in Fintech & Secure Payment Apps 👋 Hi, I’m Himanshu — a Mobile App Developer & Flutter Expert with deep experience in building scalable apps for startups, fintechs, and enterprises. My focus is on delivering secure, high-quality, and user-friendly apps that help businesses grow. With my expertise in Flutter, Firebase, Supabase, AI/ChatGPT integrations, Payment Gateways, and Advanced API systems, I take your idea from concept to launch with speed and reliability. ⸻ 🏆 Frameworks & Packages ✔ Flutter – Cross-platform apps (iOS + Android) ✔ Firebase / Supabase – Real-time backend solutions ✔ Google Maps / Location Services ✔ Agora SDK – Video & Audio integration ✔ Git / CI-CD – Collaboration & Delivery ⸻ 💯 Firebase Expertise ✔ Firestore & Realtime Database ✔ Firebase Authentication ✔ FCM & OneSignal Push Notifications ✔ Cloud Functions ✔ Crashlytics & Analytics ⸻ 🔥 State Management ✔ BLoC / Cubit ✔ Provider ✔ GetX ⸻ 💸 Payment Gateway Integration ✔ Stripe | Razorpay | PayPal ✔ Apple Pay | Google Pay ✔ In-App Purchases ⸻ 🔗 API Integration Expertise ✔ RESTful APIs ✔ GraphQL ⸻ 💫 Additional Skills ✔ Fintech & Cross-Border Payment Apps ✔ Flutter Web Development ✔ Geolocation & Mapbox ✔ Deep Linking & App Distribution ✔ Secure Authentication (OAuth, Biometric) ✔ AI & ChatGPT Integration ⸻ 🌟 What Clients Say: ✅ “ Great Person with good attitude, will consider for future assignments. ” ⭐⭐⭐⭐⭐ ✅ “Himanshu is fantastic at what he does. He is knowledgable, never falters to meet deadlines, provides useful recommendations and is very hardworking. He single-handedly helped us develop a great Flutter app from scratch and ensured a great working product with amazing UX/UI at each milestone. He will be an asset to anybody who hires him. I will definitely recommend him and I will hire him again.” ⭐⭐⭐⭐⭐ ✅ “Thanks Himanshu for your great work, its not easy to find a freelancer who has highly advanced capabilities in Flutter design, we are happy to work with you.” ⭐⭐⭐⭐⭐ ⸻ 📩 Let’s Build Your App! Message me today and I’ll help you turn your idea into a scalable, world-class mobile app. Best Regards, Himanshu Dhankecha – Flutter Developer | Mobile App Developer | Firebase Expert