Sarabjot S.
AI Solutions | LLM & Agents Expert | Full-Stack (MERN) Developer
💻 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 & 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 (𝐑𝐞𝐚𝐜𝐭 𝐍𝐚𝐭𝐢𝐯𝐞, 𝐅𝐥𝐮𝐭𝐭𝐞𝐫, 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐏𝐲𝐭𝐡𝐨𝐧, 𝐋𝐋𝐌𝐬, 𝐋𝐚𝐧𝐠𝐂𝐡𝐚𝐢𝐧, 𝐍𝐨-𝐂𝐨𝐝𝐞) 𝐰𝐢𝐭𝐡 𝟕+ 𝐲𝐞𝐚𝐫𝐬’ 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞, 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐚𝐩𝐩𝐬 𝐚𝐥𝐫𝐞𝐚𝐝𝐲 𝐩𝐨𝐰𝐞𝐫𝐢𝐧𝐠 𝟏𝐌+ 𝐮𝐬𝐞𝐫𝐬 𝐚𝐧𝐝 𝐨𝐧 𝐭𝐫𝐚𝐜𝐤 𝐭𝐨 𝐫𝐞𝐚𝐜𝐡 𝟏𝟎𝐌 𝐛𝐲 𝟐𝟎𝟐𝟖 🚀 | 🎁 𝐁𝐚𝐜𝐤𝐞𝐝 𝐛𝐲 𝐚 𝟏𝟎𝟎% 𝐫𝐞𝐟𝐮𝐧𝐝 𝐠𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞 𝐢𝐟 𝐩𝐫𝐨𝐦𝐢𝐬𝐞𝐝 𝐫𝐞𝐬𝐮𝐥𝐭𝐬 𝐚𝐫𝐞𝐧’𝐭 𝐦𝐞𝐭. I collaborate closely with founders and product teams to align sprints with business goals, ensuring long-term partnerships and consistent 5⭐ delivery. Experienced in working with non-technical founders, I translate ideas into production-ready apps with clarity and transparency. I leverage AI tools (v0.dev, CursorAI, Copilot, Devin AI) with leading LLMs (GPT-4, Claude, Gemini, LLaMA). Using LangChain, Hugging Face, TensorFlow & PyTorch, I build copilots, streamline workflows, and accelerate delivery. On the engineering side, I specialize in cross-platform mobile apps, web platforms, and backend systems, optimized for scale, performance, and security. 🥇 𝐊𝐄𝐘 𝐀𝐂𝐇𝐈𝐄𝐕𝐄𝐌𝐄𝐍𝐓𝐒 ▪ 150+ Mobile & AI-powered Apps Live on Google Play & App Store ▪ 1M+ Users Reached, scaling toward 10M by 2028 ▪ Reduced app load time by 40% and scaled apps to handle 200K+ daily requests ▪ Delivered apps with 99.9% uptime on production environments ▪ Helped startups secure funding post-MVP with production-ready apps ▪ Scaled SaaS platforms from MVP to enterprise-grade (30% lower infra costs) ▪ Designed secure infrastructures for fintech & healthcare, meeting GDPR/HIPAA standards ▪ 100% Job Success Score on projects delivered ▪ Rising Talent Badge earned for consistent performance ✨ I specialize in helping startups launch fast, then scaling their apps into enterprise-grade products ready for investors and global growth. 🏆 𝐖𝐇𝐀𝐓 𝐈 𝐁𝐑𝐈𝐍𝐆 𝐓𝐎 𝐓𝐇𝐄 𝐓𝐀𝐁𝐋𝐄 ▪ Use AI tools to accelerate development and delivery ▪ Optimize infrastructure for cost-efficiency and scale, reducing cloud expenses while keeping performance high ▪ Build products from scratch and take them to production ▪ Architect scalable systems with microservices, load balancing & event-driven design ▪ Implement security best practices (OWASP Top 10, encrypted data, secure CI/CD) ▪ Automated testing, CI/CD & monitoring ensure reliable, scalable builds ▪ Identify bottlenecks, fix bugs, and ensure smooth performance ▪ Maintain code quality and update existing mobile/web applications ▪ Expertise with cloud messaging APIs & push notifications ▪ Collaborate in Agile/Scrum teams, lead sprints & mentor juniors ▪ Skilled with Slack, Jira, GitHub, GitLab, Trello, and Notion for seamless communication 💡 𝐂𝐎𝐑𝐄 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐌𝐄𝐍𝐓 𝐄𝐗𝐏𝐄𝐑𝐓𝐈𝐒𝐄 📱 Cross-Platform Mobile Development ▪ React Native, Expo, Flutter (Dart) ▪ iOS & Android deployment (App Store, Play Store) ▪ Push Notifications: Firebase, OneSignal ▪ In-app Purchases & Payments: Stripe, PayPal, Razorpay 💻 Web & Frontend Engineering ▪ React.js, Next.js, Tailwind CSS ▪ Progressive Web Apps (PWAs) ▪ Responsive & pixel-perfect UI/UX ⚙️ Backend & API Development ▪ Node.js (Express.js), Python (FastAPI, Django, Flask) ▪ REST, GraphQL, Websockets ▪ Authentication: OAuth, Auth0, JWT, Firebase Auth ▪ Real-time systems: Chat, Collaboration Tools, IoT Integrations 🗄️ Databases & Storage ▪ SQL & NoSQL: MongoDB, PostgreSQL, MySQL, Supabase ▪ Cloud Storage: AWS S3, Google Cloud Buckets, Firebase ▪ Redis, Memcached for high-speed caching ☁️ DevOps & Cloud ▪ Docker, Kubernetes, CI/CD Pipelines (GitHub Actions, GitLab CI, Jenkins) ▪ AWS (Lambda, EC2, Amplify), Google Cloud, Azure, Firebase Hosting ▪ Infrastructure as Code: Terraform ▪ Blue-Green & Canary deployments for safe rollouts 🤖 AI-Augmented Applications ▪ LLM-powered chatbots & copilots ▪ Predictive Analytics & Personalization Engines ▪ TensorFlow & Hugging Face integrations for smart features ▪ Voice/Chat Interfaces (Whisper, Dialogflow, Rasa) 🚀 WHAT SETS ME APART ▪ Problem-First: Apps aligned with your business goals, not just code ▪ Scalable Builds: From MVPs to enterprise SaaS, apps designed to grow with you ▪ AI-Ready: Seamlessly integrate copilots, chatbots, or analytics into products ▪ Security-First: Experienced with GDPR & HIPAA compliance for sensitive data ▪ Cross-Industry Expertise: Fintech, Healthcare, Logistics, E-commerce, EdTech & more ▪ Transparent Collaboration: Weekly sprints, demo updates, and milestone-driven delivery 📩 𝐋𝐄𝐓'𝐒 𝐁𝐔𝐈𝐋𝐃 𝐘𝐎𝐔𝐑 𝐍𝐄𝐗𝐓 𝐒𝐔𝐂𝐂𝐄𝐒𝐒 𝐒𝐓𝐎𝐑𝐘 𝐓𝐎𝐆𝐄𝐓𝐇𝐄𝐑 🤝 I build enterprise-grade apps engineered for scale, security, and funding success, backed by a 100% refund guarantee if promised results aren’t met. Available 40+ hrs/week across US, EU, and AU time zones for rapid iterations and milestone-driven delivery.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $3k
Billed in all: $3,888$3.9k
$3k in the last 6 months
Earnings, last 30 days
Skill rankings: Top 14% in Java
Ranked by MRR among everyone on Upwork with the skill.
- #36Hybrid App183 freelancers · 🇮🇳 #19Top 20%🇮🇳#19 of 89
- #537MERN Stack3,086 freelancers · 🇮🇳 #205Top 17%🇮🇳#205 of 1,050
- #582App Development2,592 freelancers · 🇮🇳 #146Top 22%🇮🇳#146 of 634
- #841ExpressJS5,651 freelancers · 🇮🇳 #216Top 15%🇮🇳#216 of 1,371
- #1,160Java8,313 freelancers · 🇮🇳 #216Top 14%🇮🇳#216 of 1,808
- #1,293Vue.js8,267 freelancers · 🇮🇳 #274Top 16%🇮🇳#274 of 1,726
- #1,487AI App Development4,708 freelancers · 🇮🇳 #372Top 32%🇮🇳#372 of 1,167
- #1,703MongoDB10,865 freelancers · 🇮🇳 #501Top 16%🇮🇳#501 of 3,135