Senior Full-Stack Developer – Web App with User Accounts, Wallet System

We are seeking a skilled full stack developer to create a comprehensive wallet management system. The project involves developing an Android app for users and a web admin panel for management. The system should support multiple payment methods and provide real-time transaction up ...

We are seeking an expert to analyze, troubleshoot, and optimize our payment systems, specifically focusing on recharge mechanisms and payment liquidity. The ideal candidate will have a strong background in financial technology and experience with wallet processes. Your role will ...

We are building on-chain notification capabilities for an existing Web3 wallet and looking for an experienced blockchain engineer to design and implement a scalable notification system covering both EVM and non-EVM chains. · Native token transfers (send / receive) · Token transfe ...

We need an experienced full-stack developer to implement a Wallet / Balance Recharge System for both buyers and sellers. · ...

Project Description: · I have purchased the StackFood script from CodeCanyon and I am looking for an experienced Laravel developer (Flutter knowledge required if mobile app edits are needed) to customize it into a simplified cash-based system for a local market. · This project fo ...

Implement Wallet Mock System using local device storage no backend, no real payment integration. · Scope includes · • Default starting balance: 1,000 coins · • Wallet balance display in Lobby and during Gameplay · • Entry fee deduction of 100 coins before match start · • Confirma ...

We are enhancing an existing Web3 wallet with on-chain notification functionality and are seeking a seasoned blockchain engineer. · Design the overall approach of an on-chain notification system for a Web3 wallet. · ...

Project Title: Professional Virtual Bingo Bot for 400+ Active Players · ​1. Project Overview: · Develop a scalable Telegram Bingo Bot for a business setup where up to 400 players can play simultaneously. The bot must be fair, secure, and integrated with a payment gateway. · ​2. K ...

We're looking for a developer (or small team) to build a simple but secure multi-platform application (Flutter mobile + Web + backend). · What we need · Flutter app for Android & iOS · User Web App + Admin Dashboard · backend with authentication, wallet, transactions, · and user ...

We are looking for an experienced developer or development team to build a realistic virtual roulette mobile application that includes a secure player wallet system. · The goal is to create a high-quality casino-style roulette experience on mobile, where players can place bets, v ...

I'm building a web platform for a real-time 1v1 game called Penalty Duel. Two players join a lobby (bet size), play a fast match (4 corners + timer), and the winner gets paid minus our rake. Crypto deposits (USDT) are automated (non-custodial) and withdrawals are always manual (u ...

Job Description: · We are a growing specialty coffee brand based in Turkey, looking for an experienced mobile developer to build our customer-facing app from the ground up. *(Brand name will be shared during the interview process.)* · This is not a standard coffee ordering app. W ...

We are building an MVP (Minimum Viable Product) for a digital employee ID system that replaces plastic staff cards with Apple Wallet and Google Wallet digital passes. · The MVP will be used initially by companies for their employees. At this stage, the platform will focus only on ...

I want to create a smart contract using my ERC-20 to facilitate a voting system where MetaMask wallets vote and rewards are distributed. · ...

+We are seeking a skilled development team to Build Delivery + Wallet Apps (iOS, Android, Web).+Experience building delivery/logistics apps · Experience with payment systems or wallets · iOS, Android, Web, Backend APIs · +Must be able to deliver the system end-to-end Deliverables ...

We're looking for an experienced crypto security specialist to investigate a real payout incident on Polygon. · This role starts with forensic analysis of the incident, followed by hardening our payout process. · The ideal candidate has hands-on experience with crypto wallets, EV ...

Developer required to build a complete ride-hailing platform similar to Uber/Bolt with improved safety loyalty and transparency. · RIDER APP REQUIREMENTSUser registration & loginPhone/email verification ...

We need a senior fintech backend engineer to harden our payments + wallet + ledger system. Some customers get debited but not credited due to webhook/reconciliation/idempotency gaps. Must have real production payments experience. · You will: · Fix and harden webhook processing fr ...

This system automatically collects ETH wallet transactions via the Etherscan API, builds a relationship graph between wallets, and visualizes it as an interactive tree. A link between two wallets is defined as any transfer of ETH or ERC-20 tokens between them, regardless of the m ...

Modify Watch Skins' wallet and payment architecture to eliminate MSB risk without custodianship of user funds. · ...