Game developer · Available for work

I build, fix, and ship games.

I’m Tanmoy Roy, a game developer with 10+ years in the industry and 600+ client orders completed. I help studios and founders turn ideas, unfinished builds, and broken projects into games that are ready to release.

5.0 from 435 reviews600+ client ordersTop Rated on Fiverr

Tanmoy Roy, game developer

2D & 3D · C# · 10+ years

01 / About

A decade of making games work, then making them feel good.

I’ve spent over 10 years building games and apps, with more than 600 client orders completed. My work covers the full arc: prototyping an idea, programming gameplay and systems, polishing the feel, and getting a build ready to ship.

Most of my work targets mobile and PC, with gameplay and systems written in C#. I’m comfortable joining an existing codebase, rescuing a project that has stalled, or starting from a blank scene and building upward.

  • Full-cycle game development
  • Gameplay, systems, UI, and polish
  • Mobile, PC, and prototype work
  • Clear communication and honest scope

Based in Bangladesh · Working with clients worldwide

600+Client orders completed

5.0From 435 reviews

10+Years in the industry

From first prototype to final build.

Whether you need a game built from scratch, a stubborn bug fixed, or a project pushed over the finish line, the work is scoped around what the build actually needs.

01

✦

Full game development

Complete 2D and 3D game development, from core mechanics and prototypes to full production and publishing support.

  • 2D and 3D builds
  • Android, iOS, and PC targets
  • Production-ready project structure

Best forStudios and founders who need a complete game built and shipped.

02

⌘

Gameplay & systems

Custom C# programming for the systems that make a game tick: gameplay, physics, AI, progression, economy, and scalable UI.

  • Core gameplay and player controls
  • Progression, quests, shops, and leaderboards
  • UI/UX implementation and game feel

Best forTeams that have the vision and need the systems built properly.

03

◈

Prototyping & MVP

Turn an idea, reference, or template into a playable build fast — then test the core loop before committing to full production.

  • Rapid playable prototypes
  • Template customization and rework
  • Hypercasual and educational games

Best forFounders validating an idea before investing in a full build.

04

✦

Bug fixing, optimization & rescue

Diagnose and fix build errors, crashes, broken mechanics, and performance bottlenecks in existing projects.

  • Build and runtime error fixes
  • Performance and stability passes
  • Feature completion and cleanup

Best forProjects that are stuck, unstable, or nearly there but not quite.

Also available for educational games, hypercasual games with AdMob, and template customization.

Discuss your project

Games built, fixed, and shipped.

A selection of 2D and 3D projects across mobile, PC, simulation, and hypercasual. Each case study covers what the game is and the work that went into it.

Looking for something closer to your project? Tell me what you’re building and I’ll tell you how I can help.

Start a conversation

A full-stack game developer, not just a coder.

The work spans programming, game design, UI, assets, and the unglamorous optimization that keeps a build stable.

Engines & languages

Engines, C#, and the fundamentals

Comfortable across 2D and 3D projects, from scene setup and prefabs to custom editors, physics, and production architecture.

2D & 3DC#PrefabsGame programming

Gameplay & systems

Mechanics that hold together

Gameplay loops, player controls, AI behaviour, progression, quests, shops, leaderboards, and reward systems designed to work at scale.

GameplayPhysicsAIProgressionEconomy

Mobile & monetization

Built for real devices

Android and iOS builds, touch controls, AdMob integration, in-game economies, and performance work for modest hardware.

AndroidiOSAdMobOptimizationMobile UI

Art, UI & polish

The finishing passes

Game assets, pixel art, UI implementation, VFX, animation, and the small details that make a build feel finished.

Game assetsPixel artPhotoshopVFXUI/UX

Clear communication. No surprises.

The best projects are the ones where the client knows what is happening. These are the principles I work by.

01

You get the reasoning

Not just the code. I explain what I am doing, why it matters for the game, and where I think the build can be improved.

02

Changes are handled patiently

Projects move. Requirements change. I work through revisions without treating them like a problem.

03

Your project gets treated like my own

I look for what is best for the game, not just what is easiest to deliver. That often means going one step further than asked.

What clients say after the build.

5.0

Rated 5 out of 5 stars. ★★★★★

435 reviews on freelance marketplaces

Rated 5 out of 5 stars.

Tanmoy is not just a great developer, he truly cares about your project like it is his own. He always thinks about what is best for the game, explains everything clearly and gives his own ideas to make it better. Even when I changed things in the middle of the work, he patiently handled it without any complaint. He goes beyond what is asked and you can feel he really puts his heart into the work. It is rare to find someone this dedicated. I will definitely keep working with him. Highly recommended!

ahmetadamsNorth Macedonia

Rated 5 out of 5 stars.

Amazing person to work with, completed the work and even made adjustments when I wanted more improvements. He was consistently understanding and went above and beyond to make sure that he delivered the best work possible.

panagiotisloukaGreece

Rated 5 out of 5 stars.

Tanmoy truly IMPRESSED with outstanding code expertise and thorough documentation, far EXCEEDING expectations. Working with Tanmoy was seamless thanks to active communication and QUICK responsiveness, Highly recommend for GAME development needs! 👏

pat928873Canada

Rated 5 out of 5 stars.

Tanmoy was able to give more than what I have imagined. He is also very good in communication, can give recommendations and very prompt in cooperating. Awesome experience and will definitely work with him again!

mcrhaenPhilippines

Rated 5 out of 5 stars.

The whole process went smoothly, communication was excellent, and the work exceeded my expectations. The services were also reasonably priced. Would highly recommend to anyone who needs game development

tyreekcarterUnited States

Rated 5 out of 5 stars.

Tanmoy work in Game Development is truly outstanding! His professionalism ensured everything was bug-free, and the documentation was top-notch. Plus, his willingness to go above and beyond, coupled with quick responsiveness, made collaboration a breeze. 🙌

solrionIsrael

Rated 5 out of 5 stars.

A true professional who promptly fixed my bug, do not hesitate to contact this seller, great communication and great work!

frank__kAustralia

Rated 5 out of 5 stars.

Working with Tanmoy R was an incredibly comfortable process, he fulfilled my wishes without exception and helped. I hope we work together on other projects. You can work with the best Tanmoy R with peace of mind.

ozkayaemre3425Turkey

Rated 5 out of 5 stars.

He knows his stuff really well. Very interested in the work and does a fast job. Would love to hire him again. Highly recommended!

picarddayUnited States

Rated 5 out of 5 stars.

tonmoywizzy game development skills are TOP-NOTCH, delivering bug-free code with impressive expertise. The cooperation was seamless, and everything was done on time for the Byzantine Chess. Highly recommended as it is our 54th work together! 👍

panagiotisloukaGreece

Rated 5 out of 5 stars.

Seller did the job i asked and even more than i asked. He helped me with extra features that was not included in the gig and submitted the work many days before the deadline. Highly recommended.

ojiokorokelvinRussian Federation

Rated 5 out of 5 stars.

It was great working with tonmoywizzy. He understood the requirements I needed for the mobile game. Delivered it before the deadline which was great!

risebotUnited States

Rated 5 out of 5 stars.

I’ve been working with him and I highly recommend it. Great guy always willing yo go extra mile to help you in the gig. Thanks Ton.

maykondaikonJapan

Rated 5 out of 5 stars.

I have been working with Tonmoy for some time now. Excellent professional with great conversation, always served me with quick and effective solutions. I really recommend him.

fabiotgarciaBrazil

5.0 average from 435 reviews — 432 five-star, 2 four-star, and 1 three-star.

Talk about your project

06 / Contact

Have a game to build, fix, or finish?

Tell me what you are making, what is not working, and where you want the project to go. I will reply with a clear next step.

Emailinfo@itstanmoy.xyz PortfolioView selected projects Based inBangladesh · Working worldwide

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