Expert in Google Appsheet and Google Workspace tools (Apps Script, Forms, Sheets) and skilled in Microsoft Office . Contact me to streamline your business processes and boost efficiency!
AppSheet Developer | Google Workspace Automation | Apps Script | Zapier | n8n | Google Sheets Expert | Low-Code Developer | API Integration | Business Process Automation | AppSheet Dashboard Expert
Looker Studio
Google Apps Script
AppSheet
Google Sheets Automation
Microsoft Excel
JavaScript
Automation
ERP Software
Process Design
Zapier
Low-Code Development
No-Code Development
Inventory Management
Desktop Application
Mobile App
n8n
Make.com
Rajkamal D.
New Delhi, India
$35/hr
5.0
2 jobs
I architect secure, scalable, and high-performance SaaS platforms that are ready for production workloads—not just built for a proof-of-concept.
With 7+ years of full-stack engineering experience, I specialize in building complex software ecosystems with a heavy focus on data compliance, real-time tracking, multi-tenancy, and high-frequency transactions.
🏆 DEEP INDUSTRY EXPERIENCE:
• Healthcare SaaS: Engineered secure, clinical-trial workflows, HIPAA-compliant client/patient portals, and live audio/video consultations (Jeeva Trials).
• EV Charging & Fleet Systems: Developed real-time multi-tenant IoT charging infrastructure dashboards and data tracking telemetry (ChargeLab).
• FinTech & Real Estate: Built production-ready marketplaces with secure KYC onboarding, role-based access control (RBAC), and complex Stripe split-payment logic.
🛠️ PRODUCTION TECH STACK:
• Frontend: React, Next.js (App Router), TypeScript, Tailwind CSS, Redux Toolkit
• Backend & API: Node.js, NestJS, Express.js, REST, GraphQL, WebSockets
• Database & Cloud: PostgreSQL, Supabase, Prisma ORM, AWS (EC2, S3, RDS), Vercel
If you need an experienced engineer who understands business logic, data isolation, and scalable system architecture rather than someone who just writes basic code, let's connect.
Click the "Message" button to discuss your project scale and technical requirements.
React
Next.js
TypeScript
JavaScript
Node.js
NestJS
REST API
PostgreSQL
Web Application Development
Performance Optimization
Full-Stack Development
SaaS Development
Redux
Tailwind CSS
API Integration
AWS Amplify
MongoDB
GraphQL
Third-Party Integration
Shivam K.
New Delhi, India
$11/hr
5.0
6 jobs
Need someone who can manage your Linux infrastructure and actually knows what's happening below the application layer? I'm Shivam, a Linux systems engineer and DevOps specialist with 5+ years of experience, and a contributor to the Linux kernel mainline. I build, secure, and debug Linux servers and cloud infrastructure with the kind of low-level systems knowledge most DevOps engineers don't have.
𝐇𝐎𝐖 𝐈 𝐂𝐀𝐍 𝐇𝐄𝐋𝐏 𝐘𝐎𝐔
🐧 𝐋𝐢𝐧𝐮𝐱 𝐒𝐲𝐬𝐭𝐞𝐦 𝐀𝐝𝐦𝐢𝐧𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧
Provision, configure, and harden Linux servers (Ubuntu, Debian, RHEL/CentOS). Comfortable with systemd, networking, user/permission management, backups, and security hardening for production systems.
🧩 𝐋𝐢𝐧𝐮𝐱 𝐊𝐞𝐫𝐧𝐞𝐥 𝐃𝐞𝐛𝐮𝐠𝐠𝐢𝐧𝐠 & 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐓𝐮𝐧𝐢𝐧𝐠
As an actual contributor to the Linux kernel mainline, I can dig into problems most admins can't, kernel-level memory issues, driver conflicts, and performance bottlenecks below the application layer, not just symptom-level fixes.
⚙️ 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 𝐚𝐬 𝐂𝐨𝐝𝐞
CI/CD pipelines, Docker containerization, and Terraform-managed infrastructure. I build fault-tolerant, repeatable systems instead of fragile ones held together with manual SSH sessions.
🌐 𝐂𝐥𝐨𝐮𝐝𝐟𝐥𝐚𝐫𝐞 𝐒𝐞𝐭𝐮𝐩 & 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧
DNS configuration, CDN tuning, WAF/security rules, and Cloudflare Workers for edge logic, get your site fast, secure, and resilient.
☁️ 𝐂𝐥𝐨𝐮𝐝 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞 (𝐀𝐖𝐒)
EC2, Lambda, S3, and CloudWatch setups designed for reliability and cost efficiency, backed by my AWS Certified AI Practitioner credential.
🏆 𝐋𝐈𝐍𝐔𝐗 𝐊𝐄𝐑𝐍𝐄𝐋 𝐌𝐀𝐈𝐍𝐋𝐈𝐍𝐄 𝐂𝐎𝐍𝐓𝐑𝐈𝐁𝐔𝐓𝐎𝐑
This is the part most Linux freelancers can't say: I've had patches merged into the actual Linux kernel. My work has included fixing how `vrealloc()` releases physical memory pages when shrinking allocations (it previously only updated bookkeeping), adding memory-shrinking support to a Rust kernel data structure, and a related optimization in the Rust binder driver, plus hardware-specific display/backlight driver fixes. The work was reviewed and signed off by core Linux maintainers, including Andrew Morton, the longtime maintainer of the kernel's memory-management subsystem.
In practical terms: if your issue is below what a typical sysadmin can diagnose, an odd kernel panic, a memory leak invisible to application logs, a misbehaving driver, I can read the kernel source and actually fix it.
🌟 𝐖𝐇𝐀𝐓 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐒𝐀𝐘 🌟
❝ Working with Shivam was a fantastic experience. His expertise in performance-oriented languages like Rust and C++ was a game-changer for our project. He delivered a highly efficient and meticulously optimized solution, demonstrating a rare talent for deep, logical problem-solving at the systems level. What impressed me most was his ability to connect this low-level expertise with high-level strategic thinking. He doesn't just understand the algorithms; he has the foundation to make them run incredibly fast. Highly recommend for any demanding technical role. ❞
- Client
❝ great to work with ❞
- Adam C.
❝ Shivam was amazing. This was my second time using him for a project and I was extremely happy. I will definitely be going back to him for any new projects. ❞
- Salman L.
➤ 𝐑𝐄𝐀𝐃𝐘 𝐓𝐎 𝐅𝐈𝐗 𝐀𝐍𝐃 𝐇𝐀𝐑𝐃𝐄𝐍 𝐘𝐎𝐔𝐑 𝐈𝐍𝐅𝐑𝐀𝐒𝐓𝐑𝐔𝐂𝐓𝐔𝐑𝐄?
Looking for a Linux system administrator, DevOps engineer, or Cloudflare specialist who understands systems from the kernel up? Message me on Upwork today.
I typically respond within 6 hours and prioritize delivering production-ready results.
𝐓𝐎𝐎𝐋𝐒 & 𝐓𝐄𝐂𝐇𝐍𝐎𝐋𝐎𝐆𝐘
𝐋𝐢𝐧𝐮𝐱 & 𝐒𝐲𝐬𝐭𝐞𝐦𝐬
- Linux Kernel (mainline contributor)
- Ubuntu / Debian / RHEL / CentOS
- systemd, Bash scripting
- Networking & firewall configuration (iptables/nftables)
- Server hardening & security
- Performance debugging (strace, perf, ftrace)
𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐈𝐧𝐟𝐫𝐚𝐬𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞
- Docker
- Terraform
- CI/CD (GitHub Actions, GitLab CI, Jenkins)
- Ansible
- Monitoring (Prometheus, Grafana)
𝐂𝐥𝐨𝐮𝐝 & 𝐄𝐝𝐠𝐞
- AWS (EC2, Lambda, S3, CloudWatch, SageMaker)
- Cloudflare (Workers, DNS, CDN, WAF, Zero Trust)
- AWS Certified AI Practitioner
𝐏𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐢𝐧𝐠 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧
- Rust
- Python
- Node.js / TypeScript
- Bash
𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬
- PostgreSQL
- MongoDB
- Redis
Linux System Administrator, Linux System Administration, Linux Kernel Developer, Linux Server Management, Linux DevOps, DevOps Engineer, Senior DevOps Engineer, Cloudflare
Rust
C
API
Golang
TypeScript
Linux System Administration
DevOps
Cloudflare
Kernel
Linux
Ubuntu
System Administration
Python
Driver Development
Embedded Linux
Full-Stack Development
Anurag S.
New Delhi, India
$15/hr
5.0
1 jobs
Senior Android Developer | 7+ Years Experience | Kotlin | Jetpack Compose | MVVM
I’m a results-driven Senior Android Developer with 7+ years of experience building high-performance, scalable mobile applications across fintech, automotive, logistics, and enterprise domains. I specialize in creating robust Android apps using modern technologies like Kotlin, Jetpack Compose, and Clean Architecture.
I have a strong track record of delivering production-ready apps—from concept to Play Store release—while maintaining high standards of performance, code quality, and user experience.
💡 What I Do
End-to-end Android app development
Scalable architecture (MVVM, Clean Architecture)
UI development using Jetpack Compose & Material Design
API integration (REST, GraphQL)
Firebase integration (Analytics, Crashlytics, FCM)
Performance optimization & app stability
Play Store deployment & CI/CD setup
🛠️ Tech Stack
Languages: Kotlin, Java
Architecture: MVVM, Clean Architecture, SOLID Principles
UI: Jetpack Compose, Material UI
Libraries & Tools: Retrofit, Hilt, Room, WorkManager, Paging 3
Firebase: Analytics, Crashlytics, Cloud Messaging, Remote Config
Other Integrations: Bluetooth, RFID, CameraX, Google Maps, Mapbox
CI/CD: GitHub Actions, Firebase App Distribution
Retrofit
JavaScript
Java
Firebase
Push Notifications
Kotlin
Android App Development
JSON
Google APIs
Clean Architecture
GraphQL
Mapbox
Google Maps API
Payment Gateway
Dheeraj C.
New Delhi, India
$25/hr
4.1
52 jobs
Senior iOS and Flutter developer with 9+ years of production experience — currently building consumer apps at Ola Electric (India's largest EV brand) while independently shipping my own B2B SaaS products to market.
Top Rated · 100% Job Success · 40 Projects · 2,900+ Hours on Upwork
If you're a startup, small business, or product team that needs a mobile
developer who takes full ownership — from first commit to App Store —
you're in the right place.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔹 WHAT I BUILD
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✅ Flutter apps (iOS + Android) — Firebase, REST APIs, MVVM architecture,
Play Store & App Store delivery
✅ iOS native apps — Swift, SwiftUI, UIKit, Xcode, App Store submissions
✅ Full product builds for startups — wireframe to launch
✅ App upgrades — iOS 18 compatibility, performance tuning, bug fixes
✅ Firebase backend — Auth, Firestore, Storage, Cloud Functions, FCM
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔹 RECENT WORK
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📦 MastBhada — A fleet management app for truck owners (Flutter + Firebase)
Live on Play Store. Built for low-tech users in regional India with OTP
auth, trip tracking, P&L dashboard, driver management & challan uploads.
📱 iOS apps across 40 projects — real-time location tracking, payment
gateways, push notifications, Bluetooth, In-App Purchase, WatchOS.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔹 TECH STACK
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Flutter · Dart · Swift · SwiftUI · UIKit · Objective-C
Firebase (Auth · Firestore · Storage · FCM · Functions)
REST APIs · Provider · MVVM · Clean Architecture
Xcode · Android Studio · Git · CI/CD
App Store Connect · Google Play Console
Maps (Mapkit, Google Maps) · IAP · Bluetooth · WatchOS
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔹 WHY CLIENTS KEEP COMING BACK
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
→ 13 clients rated me "Committed to Quality" — most of them returned
→ I communicate clearly, flag issues early, and deliver on time
→ I write production-ready code, not just demos
→ I treat your product like my own — I've built and launched one myself
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🔹 SERVICES & PACKAGES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
💼 MVP Build (Flutter) — Idea to Play Store / App Store
🔧 App Bug Fix & Performance Audit
📲 iOS App Upgrade (latest Swift/SwiftUI + iOS 18)
🔥 Firebase Integration & Backend Setup
📍 Maps, Location & Real-time Tracking Integration
Ready to build? Send me a message with your idea or brief, and I'll
respond with a clear plan within 24 hours. 📩
Swift
Firebase
Objective-C
API Integration
Third-Party Integration
Android App Development
iOS Development
Apple Xcode
Cocoa Touch
JSON API
Unit Testing
CI/CD
SwiftUI
Flutter
Dart
iOS
RxSwift
Claude
ChatGPT
Mohd Z.
New Delhi, India
$45/hr
5.0
111 jobs
★★★Project Lead at TOP Graphic Designing & Animation Company - Graphic Designo Studio ★★★
--Received 5 Stars Rating From 100% Of My Clients
--Over 1000 Satisfied Customers With Top Rated Upwork Profile
--No Project Is Overdue In My Lifetime
--Do Not Believe Me Instead Read The Feedback From My Valuable Client On Upwork.
►Why Choose ME?
I have spent the previous 9 years in working as art director and creating in different kinds of animation, graphics, concepts and characters till now i have worked almost with all style of animation and graphics under 2D. I am always looking for new challenges through which i can test my skills, i also have nice hand sketching and drawing skills therefore i am also creating detailed concept arts and illustrations for games, comics, digital productions and movies.
Apart from above i am expert motion graphic artist and producing explanatory and other kinds of motion graphics as well.
MOST IMPORTANTLY, you will get
✔ The same creative who was hired by Oreo, Graphic River, Ministry Of Sports - Saudi Arabia, Gogo Driver and other top brands across the world.
✔ DESIGNER/DEVELOPER, for whom more than 50 happy customers shared their 5-Star love on Upwork and other platforms.
✔ FINAL work awesomely in compiled packages and deployment on your servers.
✔ SUPERB support even after months of closing the project.
✔ Amazing value for money. I don't overcharge like other so-called 'top' or 'premium' service providers.
I AM HAVING EXPERTISE IN BELOW SOFTWARE:
Canva, Adobe Collections, Autodesk 3DS Max, Autodesk Maya, ZBrush, Clip Studio Paint, ToonBoom, Blender, Storyboard Pro, Manga Studio
Development Projects:
Just send me a message via Upwork and we can get started.
Traditional Animation
Anime
Cutout Animation
Toon Boom Harmony
Animation
Animation for Kids
2D Animation
Logo Design
Moho
Character Animation
Photo Manipulation
Flash Animation
Graphic Design
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