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Project Overview We have an operational private Telegram system (OVX Gate) built on Node.js, PostgreSQL, and Express. Phase 1 (Onboarding & Claude AI KYC) is complete. We need a developer to implement Phase 2: An automated USDT TRC20 Escrow Trading System. Scope of WorkBot Commands: Build handlers for /escrow, /confirm, /dispute, and /trades. TRON Integration: Use tronweb to automatically sign/broadcast USDT TRC20 payouts to sellers minus a 0.5% fee. Watcher Service: Create a background service via TronGrid API to poll the escrow wallet every 30 seconds and match incoming payments to pending trades. Admin Dashboard: Add live escrow tracking, an append-only event log, and manual override buttons (release/refund) to our Express web dashboard. Tech [login to view URL] 18+ & node-telegram-bot-api PostgreSQL 14+ (writing clean migrations) tronweb & TronGrid REST API RequirementsStrong experience with Node.js backend systems and raw SQL queries. Proven experience tracking/interacting with the TRON network or similar EVM chains. Security-first mindset regarding private key management and state machine idempotency. Please reply with your experience building Telegram bots or crypto escrow systems.
Project ID: 40467964
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Hello, Automated USDT TRC20 Escrow Trading System requires a strict state machine to avoid double spending or mismatched escrow confirmations when polling TronGrid every 30 seconds. I’d implement a deterministic transaction matcher so every on-chain event maps exactly once to a trade state. Using Node.js 18, tronweb, and PostgreSQL, I’d design the escrow flow as an append-only event log so /escrow, /confirm, and /dispute always resolve from immutable history rather than live mutable state. One key edge case is handling delayed or reordered TRON confirmations, which I’d solve with idempotent transaction hashing. The watcher service would run as a resilient background worker with retry-safe polling, and admin overrides would only append compensating events instead of editing existing records.
$100 USD in 4 days
1.4
1.4
49 freelancers are bidding on average $537 USD for this job

Hello, I understand you need Phase 2 of your OVX Gate platform implemented: a secure automated USDT TRC20 escrow system integrated with Telegram, PostgreSQL, and TRON infrastructure. With my experience in Node.js backend systems, Telegram bots, and blockchain integrations, I am confident I am the best fit for this project. My approach: -Build secure handlers for /escrow, /confirm, /dispute, and /trades -Integrate tronweb for automated TRC20 payouts with fee deduction -Develop watcher service using TronGrid API to detect and match incoming payments -Implement idempotent escrow state management and transaction validation -Add live escrow tracking, append-only logs, and admin override actions -Write clean PostgreSQL migrations and optimized SQL queries -Apply strong private-key security and safe transaction handling practices I focus on reliability, security, and stable automation for financial workflows. I have experience building Telegram automation systems and blockchain-integrated backends with real-time event processing. Looking forward to collaborating.
$20 USD in 1 day
7.1
7.1

As an experienced Node.js developer, I am well-equipped to deliver seamless integration of the automated USDT TRC20 Escrow Trading System you require. My skillset includes a strong command over Node.js backend systems and raw SQL queries, which will be essential in building the required scope of work for your project. Furthermore, I can assure you of my proven experience in tracking and interacting with networks like the Tron network or similar EVM chains, aligning perfectly with what you are looking for. I would like to emphasize my security-first mindset that pertains to not only private key management but also state machine idempotency, which will play a crucial role in safeguarding your system. With me, you can rest assured about efficient utilization of tronweb & TronGrid REST API, ensuring a smooth functioning background service via TronGrid API for every 30 seconds check and analysis in the escrow wallet. Apart from my technical expertise, my proficiency in clean migrations and exceptional organizational abilities would efficiently equip your Express web dashboard with live escrow tracking, event logs, and manual override buttons. Not just another freelancer, I'm someone committed to delivering results that matter – efficiently executing tasks while communicating clearly at every stage
$20 USD in 7 days
6.2
6.2

Hello, As a team of skilled and experienced developers, we in Small Miracles understand the significance of trust, security, and efficiency in trading platforms. Our proficiency in Node.js, PostgreSQL, Express, TRON integration, and other relevant technologies aligns perfectly with your needs for Phase 2 of your P2P Crypto Escrow System. What sets us apart is our substantial experience working with TRON network or similar EVM chains that makes me confident about skillfully handling your automated USDT TRC20 Escrow Trading System. We also prioritize best practices when it comes to private key management and state machine idempotency. Lastly, building Telegram bots and crypto escrow systems has been our core competence area over years. With fluency in node-telegram-bot-api and comprehensive knowledge about the backend sphere of Node.js alongside raw SQL queries , we will seamlessly handle the development of watcher service via TronGrid API as per your requirements. We are committed to delivering impeccable results - let’s work together to realize your project’s full potential! Thanks!
$30 USD in 1 day
5.5
5.5

Hi, We will build your Phase 2 escrow system: `/escrow`, `/confirm`, `/dispute`, `/trades` handlers, TronGrid polling service, and admin dashboard with release/refund controls. For the watcher, we will use idempotent state transitions so duplicate polls never double-credit a trade. Private keys will stay in environment secrets, never in the database. A couple of quick things to confirm: 1) Is the escrow wallet already generated, or should we create it during setup? 2) How should disputes resolve: admin-only, or timed auto-release? The number quoted here is a starting estimate. The exact cost and timeline will be confirmed after we go through the full scope together. Looking forward to discussing further. Best regards, Faizan
$90 USD in 5 days
4.3
4.3

Hi, The risky part here isn’t adding Telegram commands — it’s making sure escrow state, wallet deposits, payouts, disputes, and admin overrides never disagree with each other. One bad retry or duplicate TronGrid event could release funds twice or mark the wrong trade paid. I’d build Phase 2 around a clean trade state machine: -/escrow, /confirm, /dispute, /trades mapped to strict PostgreSQL states -TronGrid watcher with idempotent payment matching and safe retry handling -signed TRC20 payout flow using tronweb, with private keys kept out of app code -append-only event log so every release, refund, dispute, and override is traceable -dashboard actions protected by validation, not just buttons calling payout logic I’ve worked on Telegram automation and API-driven transaction workflows where the main issue was duplicate events causing inconsistent records. The fix was to treat every external callback/poll result as untrusted, store it first, then process it through locked state transitions. Plan: review your current schema and bot flow, add migrations, implement the watcher, then wire payout/release/refund logic with admin logging and documentation. Best,
$20 USD in 7 days
4.0
4.0

My Name is Craig, a versatile PHP, Node.js, Vue.js, and C# developer with an impressive background in full-stack web development. With extensive experience in building efficient and scalable applications involving node.js backend systems with raw SQL queries, your project scope is an excellent fit for my skill set. I have a keen eye for implementing security-first mindset regarding private key management and state machine idempotency - skills that will be very handy in the implementation of this project's automated USDT TRC20 Escrow Trading System. Interestingly, I have successfully built Telegram bots as well as other crypto escrow systems in the past. This means your project is not only in safe hands, it is entrusted to someone who thoroughly understands the very essense of deep automated trading with cryptocurrencies just like the task at hand demands. My clients always testify to my unwavering commitment to delivering high-quality code within set deadlines and exceeding their expectations - To guarantee smooth running of your Node.js / TRON Blockchain Developer project, I will harness my solid knowledge of tronweb & TronGrid REST API to automatically sign/broadcast USDT TRC20 payouts to sellers while deducting a 0.5% fee as specified in your scope. In addition, my punctuality enforces proper planning and accountability for timely completion of tasks. Employ me on this task and witness topnotch quality output that guarantees your satisfaction.
$30 USD in 1 day
3.6
3.6

Polling every thirty seconds on TronGrid means you need a solid nonce tracking strategy to avoid duplicate broadcasts under load. I handle that by tying each escrow transaction to a unique trade ID and using a database lock before any broadcast. Can deliver a working prototype within seven days. Are you storing the escrow wallet's private key in an HSM or using environment variables with restricted access?
$26 USD in 7 days
3.2
3.2

Hello, is the escrow wallet currently single-address based or are you already generating unique deposit addresses per trade? I’ve built Telegram automation systems with payment tracking, background workers, and transaction state handling. I’ve also worked with blockchain polling flows where idempotency and payout safety were the critical parts. I’d structure the escrow flow as a strict state machine with append-only events so retries and duplicate webhook/poll events stay safe. The TRON watcher, payout handling, and admin overrides can all stay isolated to avoid corrupt trade states. Thanks
$30 USD in 1 day
3.4
3.4

Hi there, I'm Everett, a seasoned Node.js developer with extensive experience in blockchain integration and backend systems. You need to implement an automated USDT TRC20 escrow trading system within your existing Telegram bot and dashboard, ensuring secure and real-time tracking of escrow payments with manual override capabilities. I'll build robust bot command handlers, integrate tronweb for seamless USDT payouts with fee deduction, and develop a watcher service using TronGrid API to poll the escrow wallet consistently. I'll also enhance your dashboard with live escrow tracking and a reliable event log while prioritizing private key security. I can communicate in real time in your time zone and provide a simple demo or part of the project within 12 hours of starting. Q1: What is your preferred approach for private key management to ensure security? Q2: Are there specific edge cases or disputes you want the system to handle? Q3: Do you have existing documentation for the current Phase 1 system and dashboard APIs? What specific key security measures do you want to see implemented in the escrow bot integration? Best regards, Everett
$10 USD in 1 day
2.9
2.9

Hello, I understand the importance of creating a secure and efficient automated USDT TRC20 Escrow Trading System for your Telegram platform, especially after successfully completing Phase 1. My approach will leverage Node.js, tronweb, and PostgreSQL to ensure seamless integration and robust performance. Here is what I will deliver: - Handlers for the /escrow, /confirm, /dispute, and /trades bot commands. - A background service using the TronGrid API to monitor the escrow wallet and match payments to pending trades every 30 seconds. - An enhanced admin dashboard featuring live escrow tracking, an append-only event log, and manual override capabilities. I can confidently complete this within your budget and timeline, and I will keep you updated throughout the process. Could you clarify if there are any specific security protocols you prefer for private key management? Best regards
$20 USD in 7 days
2.4
2.4

Hi there, I am Cindy Viorina, and I have extensive experience developing backend solutions using Node.js, PostgreSQL, and integrating blockchain systems. I understand you're looking to implement Phase 2 of your automated USDT TRC20 Escrow Trading System. For your project, I propose building Telegram bot handlers for commands like /escrow and /confirm, ensuring a seamless user experience. I will utilize tronweb for automatic USDT payouts, implementing a 0.5% fee structure. Additionally, the watcher service will poll the escrow wallet using the TronGrid API, effectively matching incoming payments every 30 seconds. The admin dashboard will be enhanced with live tracking and manual override features, ensuring full operational control from your Express web interface. I am readily available for real-time communication based on your time zone and can provide a simple demo or a portion of the project within 12 hours of commencement. Q1: What are your specific security considerations for managing private keys? Q2: Do you have existing designs for the admin dashboard? Q3: How do you envision the user flow for the Telegram commands? Looking forward to your response! Best regards, Cindy Viorina
$25 USD in 9 days
2.5
2.5

Hello, Nice to meet you. I have read your post carefully and I think it is good fit for me. I am ready to help you on an immediate basis. I have strong experience building Node.js backend systems, Telegram bots, PostgreSQL-based platforms, and blockchain integrations including TRON/TRC20 transaction processing. I can implement secure escrow state management for /escrow, /confirm, /dispute, and /trades commands while developing an idempotent watcher service using TronGrid API to monitor incoming USDT TRC20 payments every 30 seconds and automatically match them with pending trades. I will also integrate tronweb for secure payout signing/broadcasting with fee deduction logic, build clean PostgreSQL migrations and raw SQL queries, and extend your Express admin dashboard with live escrow tracking, append-only audit logs, and manual release/refund controls. Special attention will be given to private key security, transaction validation, replay protection, and reliable trade state transitions. Your satisfaction with the project is my top priority! So, I will complete your project on time and within your budget. I'm waiting for your kind response. I will do my best for you. Cumuc
$20 USD in 7 days
1.8
1.8

Hello, I can help you efficiently develop your automated USDT TRC20 Escrow Trading System. Approach: • Simple and straightforward process • Ensuring all components are properly organized Technologies: • Node.js 18+, PostgreSQL 14+, tronweb, TronGrid API Extras: • Verification that everything functions correctly post-implementation • Brief documentation regarding any changes made Timeline: • 5–7 days Goal: To deliver a functional, ready-to-use escrow system to you—hassle-free. Ready to get started. Agustin
$50 USD in 1 day
2.0
2.0

Hi Client, Nice to meet you. With immense pride in my over ten years’ experience in web development and artificial intelligence, I assure you I am the right fit for your project. My expertise and understanding of blockchain networks like the EVM, SVM, TON and Tron are guaranteed to steer your project to success. I bring more than just relevant technical skills to the table; I have successfully worked on numerous crypto escrow systems as well as Telegram bots. This relevant experience has provided me with a security-first mindset regarding private key management and state machine idempotency - an integral aspect of your project given it's a sensitive financial system. You can be certain that I will create a watcher service using the TronGrid API that will meticulously watch your escrow wallet every 30 seconds. Lastly, I take pride in creating reliable, scalable and innovative solutions Just like you want for this project. Distinguished by my commitment to clear communication and timely delivery I can guarantee you 200% satisfaction at every stage of this project. Together we can transform your great ideas into even greater realities! Best regards, Jane
$20 USD in 7 days
1.5
1.5

Hi, I have strong experience building secure Node.js backend systems, Telegram bots, and API-driven automation platforms. I can implement the full USDT TRC20 escrow workflow including TronWeb integration, automated payment tracking, payout handling, dispute flow, and admin dashboard controls with a security-first approach. I’m comfortable working with PostgreSQL, raw SQL migrations, Express, and blockchain transaction monitoring, and I can deliver a clean, maintainable, fully documented solution with reliable state handling and automation.
$20 USD in 1 day
1.6
1.6

Hi, this is a solid Phase 2 backend/integration job, not just a bot update. The key part is making the escrow trade state safe: payment detected once, matched correctly, released/refunded once, and logged clearly. I’ve worked with Node/Express backends, PostgreSQL workflows, API integrations, Telegram-style command flows, and admin dashboard logic, so I can help connect the bot, watcher, database, and dashboard cleanly. I’d start by reviewing the existing trade/onboarding schema and mapping the escrow state machine before touching payouts. Then I’d add the TronGrid watcher and command handlers with idempotent checks, append-only events, and manual admin controls so retries, delays, or duplicate webhook/poll results don’t create bad releases. Thanks!
$30 USD in 7 days
1.0
1.0

Hello there , Good evening! I’ve carefully checked your requirements and really interested in this job. I’m a software developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in Web, Mobile app Development with AI integration and I have rich experienced in Python, Automation, Content Writing, Prompt Engineering, Article Writing, AI Model Integration, AI Content Writing, AI Development, AI Content Creation and Copywriting. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Always happy to hear from you
$15 USD in 1 day
0.4
0.4

꧁? ⚠️ Stop Scrolling ⚠️ ?꧂ As a Senior Full Stack AI Engineer and Software Architect, my expertise aligns perfectly with your project needs. I have a proven track record of designing and building scalable SaaS platforms and AI-powered applications, along with deep experience in backend systems using Node.js and raw SQL queries. This expertise will be invaluable in implementing Phase 2 of your project - the automated USDT TRC20 Escrow Trading System. Moreover, I am well-versed in interacting with the TRON network and similar EVM chains, a necessary requirement for efficient implementation of the TronWeb REST API in your project. Additionally, my security-first mindset regarding private key management and state machine idempotency ensures that your system will be robust and secure. Finally, my focus on engineering quality, scalability, and effective communication is at the core of my work ethic. I prioritize writing clean, maintainable code that can be scaled effortlessly when needed - something that is essential for any production-ready product. With me on board, rest assured that not only will we deliver the required functionalities but also build a system that's reliable, maintainable, and built for growth. Best, Julian
$50 USD in 3 days
0.0
0.0

Hello, Drawing from over a decade of experience as an Architect in performance-critical software systems, I bring to the table more than just the ability to write code; I can skillfully engineer the entirety of your Node.js project. My strength lies in optimizing systems to guarantee peak performance while boasting a solid security foundation, making me the perfect choice for your automated USDT TRC20 Escrow Trading System. Having spent significant time working with high-stake projects, I have honed my expertise in troubleshooting and performance optimization; this translates superbly to the task at hand which demands seamless integration with TRON Blockchain to ensure smooth functioning of the escrow system. Moreover, my knowledge extends not just to Node.js but also PostgreSQL, tronweb, and TronGrid REST API that are central facets of this project. Furthermore, I am no stranger to building telegram bots or working on crypto escrow systems, given their relevance in today's digital landscape. My proficiency using node-telegram-bot-api and PostgreSQL combined with my understanding of clean migrations will facilitate efficient implementation of the bot commands you require (e.g., /escrow, /confirm) as well as the formidable task of adding live escrow tracking on your Express web dashboard. With me, you can trust that your project is in capable hands, ready to exceed expectations. Thanks!
$10 USD in 4 days
0.0
0.0

Hi, Secure TRC20 escrow system with Telegram bot automation, wallet watcher & admin controls Built Node.js Telegram bots with payment workflows, blockchain integrations, and event-driven backend systems with PostgreSQL state machines and audit logs. Implement robust escrow state machine in Postgres (pending/paid/locked/released/disputed), TRON integration via tronweb + TronGrid polling worker, deterministic payment matching, and secure key handling via env/KMS. Build bot command handlers (/escrow /confirm /dispute /trades) plus Express admin dashboard with live escrow feed, immutable event log, and manual override actions with strict idempotency safeguards. Ready to build a production-grade, secure escrow system.
$30 USD in 7 days
0.0
0.0

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