Experienced Frontend developer for TG mini app & Bugs fix
45 USD We are looking for an experienced frontend developer to continue working on Coinfolio — a Telegram Mini App for tracking a crypto portfolio with real-time data, managing multiple portfolios, and smart price notifications.
About the project
Coinfolio is a production-ready application in Telegram (@coinsfolio_bot). Users track their crypto assets directly within Telegram: current prices, P&L calculation, and push notifications for price alerts.
Stack: Next.js 15 (App Router), TypeScript, Tailwind CSS v4, Radix UI, Telegram UI, Zustand, React Query (TanStack), Framer Motion, i18next, Recharts. Backend: Node.js on Railway + PostgreSQL. The frontend is deployed on Vercel.
How we work
We start with a small paid test task — fixing a real bug in production. If everything goes well, we move on to a long-term collaboration: new features, UI improvements, performance optimization, and UX. The codebase is clean, well-structured, and follows modern React patterns.
Test task — bug in the modal on iPhone
In the modal window that opens when adding a crypto asset to the portfolio, there is a UI bug. It manifests specifically on iPhone (iOS Safari / embedded Telegram browser) and causes layout or interaction issues within the modal. Your task is to reproduce, debug, and fix it.
A physical iPhone is not required — you can use Telegram Web (web.telegram.org) and browser DevTools with a mobile viewport to reproduce and debug.
If the fix is of high quality and communication is smooth — we continue working together.
Requirements: confident experience with Next.js, TypeScript, and Tailwind CSS; familiarity with Telegram Mini Apps or similar mobile environments with constraints; experience debugging iOS-specific layout, scrolling, and focus issues; a sense of UI/UX. React Query and Zustand are a plus.
Before you apply
Applications that do not follow these steps will not be considered.
Please open @coinsfolio_bot in Telegram and go through the flow of adding a crypto asset to the portfolio — open the modal, interact with it. In your application, indicate: did you notice the bug and what exactly did you see; what is your initial hypothesis about the cause — a final solution is not needed, just a direction of thought: keyboard behavior on iOS, scroll containment, focus issues, viewport peculiarities in Telegram, etc. We have already tried several approaches, so it is important to understand which direction you are thinking in.
We are waiting for those who love to delve into details.
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10 days609 USD
10 days609 USD
I have experience in developing mini-applications for Telegram and fixing bugs on the frontend. I work on projects using Laravel and Vue.js, which has allowed me to successfully implement similar tasks. I understand the importance of accuracy and quality in development.
I work at a rate of $15/hour.
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1 day45 USD
1 day45 USD
Hello! I am ready to take on your project and will complete it urgently. I have extensive experience with similar tasks, so there will be no difficulties. If I have piqued your interest, feel free to write; I am happy to collaborate!
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1 day45 USD
265 1 day45 USD
Good day, I am writing on behalf of the company Devoxen. We specialize in Telegram Mini Apps and frontend development using Next.js. We have extensive experience with TypeScript, Tailwind, Zustand, React Query, and iOS-specific bugs within Telegram WebView. We reviewed the flow in the Coinfolio Bot — the issue indeed seems to resemble a viewport/keyboard behavior conflict in iOS Telegram WebView: most likely a combination of dynamic viewport height, scroll locking of the modal, and recalculating the safe area when focusing on the input. There is also a feeling that part of the bug may be related to overscroll containment or fixed positioning within the modal portal on Safari.
We can quickly join the project, reproduce the issue properly through iOS emulation, and bring the fix to a production-ready state without unnecessary time delays. We also provide a guarantee and support if desired. We can take on your project immediately after discussing the technical specifications.
I suggest moving to private messages for a more detailed dialogue.
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1 day45 USD
702 1 0 1 day45 USD
Hello! I looked at your project.
I didn't find any critical bugs, just a few minor improvements on the UI and optimization.
1. When purchasing currency, the first loading of filters takes a long time; it's not critical, but it's unpleasant.
2. When looking at the market prices of coins, the text blends a bit, I can recommend increasing the padding by 1-2px.
It's an interesting project. Overall, I'm ready to take it on; I offer quick and quality work.
Feel free to write!)
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1 day45 USD
1315 2 0 1 day45 USD
I opened the bot, went through the flow of adding an asset - a modal on iPhone with specific issues due to Safari's viewport and focus specifics. I encountered a similar bug in the Telegram Mini App on Recharts: the chart broke the layout when the keyboard opened, I fixed it using dynamic viewport units and controlling the resize event in iOS.
I have a couple of clarifications. Does the bug occur only when focusing on the input or also when simply opening it? And are you already using the Telegram Mini Apps SDK for lockOrientation / expand? This will narrow down the cause - Safari 100vh or specifically Telegram WebView quirks.
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1 day45 USD
344 1 0 1 day45 USD
Good afternoon, I noticed that the "Add a note" field is not the same color as the other fields, and the modal shakes when the keyboard opens; I would make a smooth transition. Also, where the modal "Select service" for buying crypto is, it got stuck and there is no way to close it; I managed to close it, but with difficulty, you need to hit the spot to pull it, I would just add a close button.
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1 day45 USD
94026 1265 1 10 1 day45 USD
Hello. I have extensive experience with Next.js/Telegram Mini Apps. I am ready to fix the bug.
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2 days45 USD
178 2 days45 USD
I am a NextJs, React, NestJs developer. I am ready to take on this task.
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3 days45 USD
726 9 1 3 days45 USD
Hello! I have reviewed your project and am ready to start working. I guarantee high quality and prompt execution.
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1 day68 USD
9897 67 0 1 day68 USD
Hello! I will complete your task quickly and efficiently.
My recent works
https://florist-map.vercel.app
https://indexfast.pp.ua
https://monitortest.pp.ua
https://mamamia.pp.ua
My portfolio: https://freelancehunt.com/ua/freelancer/romas6ka.html#portfolio
… Message me, I will start working today. I look forward to collaborating with you!
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1 day45 USD
1 day45 USD
Hello!
We are dZENcode – a full-cycle digital solutions development company: from design and programming to integrations and post-release support. We take on projects from scratch and also engage in the refinement of existing solutions.
We can connect a frontend developer for this Telegra_m Mini App and quickly resolve the bug in the modal.
What tasks need to be prioritized first?
You can find detailed information about our services and projects in our profile:
Freelancehunt
… Take a look – after that we can discuss the details and agree on the next steps.
⚠️ After clarifying all the details, we will determine the scope, suitable format of cooperation: task-based, outsourcing, or outstaffing, and the final cost.
Why projects with us are guaranteed to reach release:
💎 10+ years of providing IT services;
🔥 90+ in-house specialists;
🚀 250+ public reviews since 2015;
⚙️ We support the product under SLA after launch;
✅ We work under NDA and a contract with the company!
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1 day45 USD
1309 7 0 1 day45 USD
Good day, I have experience working with Python as well as Telegram bots, I can complete everything quickly and efficiently, write to me and we will discuss the details.
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1 day45 USD
522 2 1 1 day45 USD
I am a Fullstack developer with commercial experience. I work with both frontend and backend, so I can handle the task.
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1 day45 USD
10130 117 0 1 day45 USD
Hello.
I am a NodeJS developer. I have experience with Telegram bots. I am ready to take on the task. Write to me, and we will discuss.
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