Sahedul Islam Rony
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Sahedul Islam Rony, full-stack engineer

I build and ship AI + SaaS products.

Full-stack engineer in React, Next.js and Node.js. I take products from the first commit to production and look after every release that follows.

Request my CV See recent works
  • Top Rated on Upwork
  • 100% Job Success Score
  • Open to full-time roles

Build, ship, maintain.One engineer for all three.

Most engineers do one of them. I do all three, so the person who wrote the feature is the same person who puts it in production and answers for it afterwards.

  1. Build

    Interfaces in React and Next.js, APIs in Node.js, data in PostgreSQL and MongoDB, and AI features connected to OpenAI, Claude and DeepSeek.

    • Interface
    • API
    • Database
    • AI features

  2. Ship

    Production is the deliverable. Integrated with the services the product depends on, tested against real use, deployed and handed over working.

    • Integration
    • Testing
    • Deployment
    • Handover

  3. Maintain

    I stay on after launch: fixes, follow-on milestones and changes as the product learns what its users need.

    • Fixes
    • Milestones
    • Refactors
    • Support

Recent client work.

Delivered for clients on Upwork and directly.

  1. AI Interview Prep Coach

    An AI coach that helps candidates prepare for interviews, developed for a client from the first build to a working product.

    Upwork contract

  2. LinkedIn Profile Analyzer

    Reads a LinkedIn profile and returns AI-written feedback with a score, so the owner knows what to improve.

    Upwork contract

  3. PDF export pipeline

    A document export that reproduces the on-screen preview exactly, handles page breaks and dynamic layouts, and maps the client's data fields into the finished PDF.

    Upwork contracts

  4. Job Matching System

    An HR tool that matches jobs against a candidate's CV, with AI suggestions on fit and what to improve.

    Private client

The system I build with.

Three layers, the way they run in production.

Interface

What people see and use.

  • React
  • Next.js
  • TypeScript
  • JavaScript

Server and data

Where the logic and the records live.

  • Node.js
  • FastAPI
  • REST APIs
  • Supabase
  • PostgreSQL
  • MongoDB

AI

Models wired into the product.

  • OpenAI
  • Claude
  • DeepSeek
  • Custom LLM
  • Vector embeddings
  • RAG

Experience.

Freelance contracts, a full-time product role and direct client work.

  1. Aug 2025 – Present

    UpworkRemote

    Full Stack Engineer, Top Rated Freelancer

    Full-stack web applications with AI features for clients. Top Rated, with a 100% Job Success Score.

  2. Sep 2025 – Aug 2026

    CV LabzRemote

    Software Engineer, full-time · Netherlands

    Built and improved the platform's AI-driven features, fixed bugs, optimised performance and strengthened stability, working across React, Node.js, Express and TypeScript.

  3. Mar 2023 – Present

    Local agencies and private clients

    Full-stack developer

    Websites and web applications designed, built and kept running for direct clients.

Education and certifications.

Looking for an engineer who stays after launch?

I’m open to full-time engineering roles and to client projects in AI and SaaS.

  • Bangladesh
  • GMT +6.00
  • CV on request