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You will get last mile delivery service
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Project details
You will get a Uber-like last-mile courier delivery service with web UI for clients, mobile app for couriers and admin dashboard.
- Calculation of cost and delivery time
- Selection of the type of parcel
- Tracking order status
- Courier chat
- Google maps integration
- Personal account with login and authorization
- Admin dashboard with tracking previous courier and client actions
- Orders history
- Client-side web version
- Courier-side mobile app
- Transparent billing system and 1 integration with your chosen payment provider
We know that every business is unique with its own needs, so we can discuss extra features relevant to your project
- Calculation of cost and delivery time
- Selection of the type of parcel
- Tracking order status
- Courier chat
- Google maps integration
- Personal account with login and authorization
- Admin dashboard with tracking previous courier and client actions
- Orders history
- Client-side web version
- Courier-side mobile app
- Transparent billing system and 1 integration with your chosen payment provider
We know that every business is unique with its own needs, so we can discuss extra features relevant to your project
Programming Languages
JavaScript, TypeScriptWhat's included $25,000
These options are included with the project scope.
$25,000
- Delivery Time 60 days
- Number of Revisions 5
- Number of Pages 3
- Responsive Design
- Source Code
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BS
Bibo S.
Dec 22, 2025
30 minute consultation
HM
Hakims M.
Sep 9, 2025
Need Web3 dev to fix wallet connect + small DApp tweaks
Sergey did awesome job, wallets finally connect no issues, balance shows right now, small UI stuff he just fixed super quick, really easy to work with and even gave some cool tips, happy with result and yeah definitely will work again - React / Web3 jobs are great fit for these guys
ID
Ivans D.
Aug 28, 2025
Solidity Developer for Smart Contract + Frontend
so yeah, Sergey basically took my half-broken contract and turned it into something that actually makes sense. i wasn’t even sure how to explain what i wanted, but he somehow got it. not bloated, no useless junk, just works. even the frontend part, wallets click in and boom transactions fly. docs look like notes from a friend, not some boring manual. can’t complain, feels good when dev actually delivers instead of talking too much.
VK
Vimal K.
Jan 29, 2020
Haskell API backend developer
It was great working with Sergey. He has very strong ethics in term of completing the task. Our project requirement were moving but still they were able to adjust to the changing requirements. Also their knowledge about Haskell was quite good.
JL
Jerad L.
Nov 1, 2019
Help us build an event sourced marketplace in Haskell
Sergey and his team are great collaborators and integrated nicely with our team over the past several months.
They produce fast, high-quality work and we would definitely recommend working with them.
They produce fast, high-quality work and we would definitely recommend working with them.
About Sergey
Blockchain Developer, Solidity, Web3, Smart Contracts, DeFi, NFT, ERC
100%
Job Success
Barcelona, Spain - 12:41 am local time
I’m a senior blockchain engineer focused on building and scaling production-grade Web3 systems, from smart contracts to full DeFi architectures and backend integrations.
I collaborate with security auditors (including Certik) on selected projects when formal audit stage is required, but my main focus is clean architecture, secure contract design, and long-term maintainability before audit even becomes necessary.
🏆 Blockchain Expertise
11+ years building Web3 infrastructure, including:
Smart contract development (Solidity, Rust, Move)
Tokenomics & stablecoin architecture
DeFi protocols: staking, liquidity pools, AMMs, lending/borrowing
Wallet & blockchain integration
Cross-chain bridges & interoperability
Security audits, gas optimization, and threat analysis
Node setup, backend APIs, indexing & on-chain data pipelines
𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝗲𝗱 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀:
Gold-backed Stablecoin System (Liechtenstein Launch)
✔ KYC onboarding, Sumsub integration
✔ Smart contracts on Ethereum + Polygon
✔ Oracle pricing + OTC gold price feeds
✔ Token mint/burn mechanics
✔ Reserve-backed auditing model
✔ Whitelist & transfer-restriction compliance
✔ Storage-fee mechanism (token balance decay)
✔ Full on-chain/off-chain architecture
DeFi Protocols (AMMs, staking, farming)
✔ Smart-contract suite (Solidity)
✔ Reward distribution mechanisms
✔ Price oracle integration (Chainlink)
✔ Security hardening & audit fixes
NFT platforms & minting engines
✔ ERC-721 / 1155 collections
✔ Royalty logic, metadata generation
✔ Claiming contracts, allowlists, randomness
𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸:
Smart Contracts: Solidity, Rust (Solana), Move (Aptos/Sui)
Frameworks: Hardhat, Foundry, Truffle, Anchor
Security: Slither, Mythril, Echidna, Certora
On-Chain Data: TheGraph, SubQuery, custom indexers
Blockchains: Ethereum, Polygon, BNB Chain, Arbitrum, Optimism, Avalanche, Solana, TON
Backend: Node.js, NestJS, PostgreSQL, Redis, Docker
Tools: Chainlink, Safe (Gnosis), IPFS, Pinata, Fireblocks
Want a secure, scalable blockchain product, not a risky MVP?
Send the documentation, and let’s build it correctly from day one.
𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀:
Blockchain, Web3, Blockchain Developer, Web3 Developer, Smart Contract Developer, Solidity Developer, Rust Developer, Move Developer, Ethereum Developer, DeFi Developer, Smart Contract Audit, Security Audit, Tokenomics, Stablecoin Development, NFT Development, ERC20, ERC721, ERC1155, Solidity Engineer, Blockchain Architecture, DApp Backend, Oracle Integration, Chainlink, Hardhat, Foundry, Web3 Security, Multi-Chain Deployment, DeFi Protocol, Yield Farming, Staking Contract, Vesting Contract, Governance Token, On-Chain Data, TheGraph, EVM Developer, Crypto Developer, Blockchain Consultant, Token Development, ICO/IDO Smart Contracts, Bridge Development, Layer 2 Developer, Polygon, Arbitrum, Optimism.
Steps for completing your project
After purchasing the project, send requirements so Sergey can start the project.
Delivery time starts when Sergey receives requirements from you.
Sergey works on your project following the steps below.
Revisions may occur after the delivery date.
1. Gather requirement
We list features that you want in your service, we discuss terms of reference, UI, layouts
2. Deliver first version
You can see how the service works, test features and apps