Hi, I'm Shuvo Haldar 👋
Senior Full-Stack Developer & DevOps Engineer
5+ years building & scaling SaaS products with React, Vue, Node.js & AWS — from first commit to production deployment.
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Years Experience
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Projects Delivered
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SaaS Products Shipped
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Countries Worked
Featured Work
Production SaaS products I architected and built end-to-end at Nextbit. Source is under NDA — live links, video walkthroughs, and code walkthroughs are available on request.
- 🟢 Live2026
FeedbackRun
Lead Full-Stack Engineer · Nextbit
Product-feedback & roadmap SaaS — for humans and AI agents. Voting portal, embeddable widget, AI triage, and revenue-weighted prioritization.
- Agent-native: a built-in MCP server lets AI tools (Claude, Cursor, Windsurf) list, search, create, and prioritize feedback over natural language — a first in the category.
- Revenue-weighted prioritization — votes are weighted by each end-user's MRR and deal-blockers carry a dollar value, turning the roadmap into a revenue model, not a popularity contest.
- Production-hardened: OpenTelemetry tracing, health-checked auto-rollback deploys, and nightly encrypted backups with a weekly automated restore-test that actually replays the backup.
Next.js 16GraphQL / FastifyPostgreSQL + pgvectorRedis / BullMQStripeMCP - 🟢 Live2023–2026
Peasy
Full-Stack Software Engineer (~3 yrs) · Peasy · Malaysia
Omnichannel engagement & AI-automation SaaS — one inbox across WhatsApp, Messenger, Telegram, X, Line, email, SMS & web chat, with a visual chatbot flow builder, LLM/voice AI, ad-campaign automation, and commerce.
- Built a node-based visual chatbot flow builder end-to-end — a drag/zoom canvas of typed nodes (LLM reply, Stripe payment, booking, API call, branching) plus the Node service that compiles the flow graph into a deployed Botpress bot.
- Shipped a real-time barge-in voice-AI pipeline (WebSocket streaming Google STT → OpenAI → MiniMax TTS) and a multi-tenant WhatsApp session manager across official (Meta/360Dialog/Twilio) and unofficial (Baileys) providers.
- Delivered the LLM chatbot suite (RAG, tool-calling, cost tracking, eval harness), campaign builders, and a Facebook/Google ad-automation console — the interactive, high-complexity parts across ~600 Vue components, not CRUD screens.
Vue 2 / VuexReact / Redux-SagaNext.js / TSNode.js / ExpressOpenAI · BotpressWhatsApp APIs · Stripe - 🔒 Personal · Private repo2026
iamwithtrees
Solo Founder & Engineer · Personal Project
A solo-built microservices SaaS platform — one identity unlocks many services: a full online-exam LMS, a real-time notification backbone, and an ML content-moderation engine.
- True microservices — each domain is its own Express + TypeScript service with its own PostgreSQL database, synced over Redis Streams (consumer groups, no message loss) via per-service user replicas.
- ModeraStack — a multi-tenant ML content-moderation engine: a fast in-process L1 gate plus an async Python L2 worker (15+ transformer models + faster-whisper) for text, images, video & PDFs, tuned for a CPU-only VPS.
- A full exam LMS that scores results the way 24 real exams do (IELTS bands, SAT scaled, JEE percentile, NEET ranking…), with an anti-cheat exam hall, gamification, and an SEO-driven public-exam growth engine.
TypeScript / ExpressMicroservicesPostgreSQL / PrismaRedis StreamsPython MLNext.js + ExpoRead case study →🎥 Demo coming soon - 🔒 Private · NDA2026
Krey
Lead Full-Stack Engineer · Nextbit
Multi-tenant creator-commerce platform — creators launch a branded storefront on their own domain and sell digital products, courses, and memberships with built-in checkout and payouts.
- Multi-tenant storefronts on creators' own custom domains, with automated DNS verification and SSL via Cloudflare for SaaS — point a domain and it just works.
- Secure paid-content delivery: files in object storage handed out as short-lived signed URLs, re-signed on each authorized read, so paid downloads and course media can't be hot-linked.
- A real SaaS billing engine — tiered plans with feature gating, proration, Stripe Customer Portal, and idempotent webhook-driven subscription lifecycle.
Next.js 16Hono APIPostgreSQL / Prisma 7RedisStripeCloudflare for SaaSRead case study →🎥 Demo coming soon - 🔒 Private · NDA2025
Laundry Near Me
Full-Stack Engineer (sole developer) · Nextbit
"Uber-for-laundry" marketplace connecting customers, drivers, and partner laundries — real-time tracking, in-app payments, and automated supplier settlements across four apps and an admin console.
- Authorize-at-booking, capture-at-weigh-in payments (Stripe manual capture) — charges the real weighed amount, capped at the hold, never overcharging. The backend is the sole pricing authority.
- Automated revenue split (delivery fee + commission + weekly listing) with suppliers settled 48h after delivery via Stripe Connect — idempotent, never-negative, with refund clawback handling.
- Five surfaces (customer, driver, laundry, admin, API) sharing one type-safe pricing engine and Zod contracts, so four apps never disagree about money or state.
TypeScriptFastify / PrismaPostgreSQL / RedisSocket.IOStripe ConnectReact Native (Expo)Read case study →🎥 Demo coming soon - 🔒 Private · NDA2025
Agency Portal
Full-Stack Engineer (sole developer) · Nextbit
All-in-one operations SaaS that runs a digital agency end-to-end — CRM, task management with time tracking, invoicing, a magic-link client portal, and pay-to-onboard billing in one role-aware app.
- A real authorization/scope model proven by 10 executable proof-suites that drive the live server and assert against the DB — role boundaries and client-data isolation are demonstrable, not assumed.
- Pay-to-onboard: a prospect picks a plan, checks out via Stripe, and their account is provisioned automatically and idempotently by webhooks — no human in the loop.
- Passwordless magic-link client portal returning a redacted projection, so each client sees only their own projects, invoices, and reports — enforced on the server, not hidden in the UI.
TypeScriptHonoPostgreSQL / DrizzleBetter AuthStripeReact 19Read case study →🎥 Demo coming soon
About Me
I'm a senior full-stack developer and DevOps engineer with 5+ years of experience building and shipping production SaaS across Malaysia, Bangladesh, and Australia. I work end-to-end — from React, Next.js and Vue front ends to Node.js (Fastify / Hono) APIs and PostgreSQL, all the way to the infrastructure that runs them: Docker, AWS/VPS, Nginx, CI/CD and production monitoring.
Most of my work is real products with real users — payment systems and marketplaces (Stripe & Stripe Connect), AI-driven features (LLM/RAG, streaming voice, MCP), real-time apps over WebSockets, and multi-tenant SaaS platforms. I care about type-safe, well-architected code that's proven in tests and reliable in production, and I like owning features from first commit to deploy.
I'm currently building SaaS products at Nextbit, and I'm open to full-time roles worldwide — remote, on-site, or relocation — with visa sponsorship welcome.
Skills & Tech Stack
The stack I use day to day to build, ship, and run production software.
Frontend
Backend
Databases
DevOps & Cloud
AI & Integrations
Tools & Testing
More Projects
A few personal & open-source builds with full source on GitHub — lighter side projects alongside the professional case studies above.
SpeakUP AI
An AI web app that converts text into natural-sounding audio, built with Next.js and Node.js. Includes monthly and yearly subscription tiers for premium access, with JWT + cookie-based authentication.
Sports Shop
A group-built sports shop web app (React.js + Node.js). I built the live quiz event and the real-time chat system using Socket.IO for instant, bi-directional data transfer.
Education
BSc in Industrial & Production Engineering (IPE)
Jashore, Bangladesh
Bachelor of Science from the engineering faculty.
- Completed two professional trainings in an industrial environment.
- Served as class representative for over a year.
- Attended workshops and seminars.
Higher Secondary Certificate (HSC) — Science
Jashore, Bangladesh
Completed higher secondary studies in the science group.
- Studied in the science group.
- Participated in several debates.
- Led a team in the practical laboratory exam.
Training & Courses
Practiced spoken English and prepared for the IELTS exam.
- Improved English fluency through IELTS preparation.
- Participated in debates on various topics.
- Joined group discussions to build fluency.
Certificates
Advanced CSS and Sass
Udemy
ReferenceLearnt the practical implementation of CSS from this course. It also deepened my knowledge of advanced CSS — pseudo-classes, custom properties, and manipulating CSS with JavaScript.
MERN Stack with Blog Project
Udemy
ReferenceCompleted this Udemy course, building a full blog project to learn the practical implementation of the MERN stack end to end.
Recommendations
Muhamad Azman
Full Stack Developer
Shuvo is a highly dedicated and hardworking individual who consistently delivers exceptional results. His strong work ethic, commitment to excellence, and ability to overcome challenges make him an invaluable asset to any team. Shuvo's proactive approach and attention to detail ensure that he not only meets but often exceeds expectations. He is a dependable professional who takes pride in his work and strives for continuous improvement.
Amirul Amir
Customer Support Executive · Peasy AI
Shuvo is very helpful with our Peasy.AI customers’ technical issues. He even coached me basic coding knowledge to better understand and identify the root cause of our customers’ issues.
As a software engineer, his skills helped to improve our platform interface and performance as per requested by our CEO, with minimal supervision.
Sabbir Ahmed
Frontend Developer · Biddrup
Working with Shuvo at Biddrup was a fantastic experience. He brought a wealth of knowledge and skill to our web development projects, consistently producing outstanding results. His ability to tackle complex problems with innovative solutions was invaluable. Shuvo's dedication and excellent communication skills make him a standout professional in his field.
How I Can Help
Available for full-time roles, contract, and project work— remote worldwide or relocation. Whether you're a company, an agency, or a client, I can own the work end-to-end.
Full-Stack Web Development
End-to-end web apps — React/Next.js or Vue front ends, Node.js APIs, databases, and deployment.
SaaS Product Engineering
Multi-tenant platforms with auth, payments & subscriptions (Stripe), and real-time features — built to scale.
Backend & API Development
REST & GraphQL APIs on Node.js (Fastify/Hono), PostgreSQL/Prisma, Redis, and WebSockets.
DevOps & Deployment
Docker, AWS/VPS, Nginx, CI/CD, and production observability — from first commit to live.
Frequently Asked Questions
Is Shuvo Haldar available for hire?
Yes. Shuvo is open to full-time roles worldwide — remote, on-site, or relocation, with visa sponsorship welcome — and also takes on contract and project work.
What is Shuvo's tech stack?
Frontend: React, Next.js, Vue.js, TypeScript, Tailwind CSS. Backend: Node.js (Fastify, Hono, Express), REST & GraphQL, PostgreSQL, Redis. DevOps: AWS (EC2, S3), Docker, Nginx, CI/CD — he works and ships end to end.
What kind of applications has Shuvo built?
Production SaaS products: payment systems and marketplaces (Stripe and Stripe Connect), AI-driven features (LLM/RAG, streaming voice, MCP), real-time apps over WebSockets, and multi-tenant platforms — several serving real business customers.
How many years of experience does Shuvo have?
5+ years as a senior full-stack developer and DevOps engineer, across Malaysia (Peasy AI), Bangladesh (Biddrup), and Australia (Nextbit).
Can Shuvo work with agencies or as a contractor?
Yes. He currently builds SaaS products at an agency (Nextbit) and is comfortable owning features end to end for agencies, startups, and direct clients — full-time, contract, or per project.
Where is Shuvo based, and how can I contact him?
Shuvo is based in Khulna, Bangladesh (GMT+6) and is open to relocation worldwide. Reach him through the contact form on this site or by email at shuvoh38@gmail.com.
Contact information
- Country:
- Bangladesh
- City:
- Khulna
- Email:
- shuvoh38@gmail.com
- Phone:
- +880-1927-173843
- Skype:
- live:shuvoh38