Browse categories
Explore
Fiverr Pro
English
$
USD
I will be your blockchain developer for web3 dapp defi crypto polymarket trading bot
Blockchain developer, DeFi protocol, Smart Contract, Web3, Trading Bot
I am Marko Jovanovic, a Senior Blockchain developer specializing in smart contracts and DeFi protocols. I develop high-quality smart contracts and web3 for DEXs (Uniswap, PancakeSwap), DeFi platforms ...
Level 2
Has met high performance criteria and has a proven track record for meeting client expectations.
About this Gig
Hi, Dear clients, Welcome to my Fiverr Gig.
As a seasoned blockchain developer, I will build following projects for you!
Crypto token contract and website
- erc20, erc-721, erc-1155, etc
- spl, spl 2022
- custom tax & fee logic
- RWA token
Blockchain Web3 dApp and DeFi platforms
- token PRESALE dapp
- token & NFT STAKING dapp
- token ICO, IDO, IGO launchpads. Pump.fun, Four.meme
- Decentralized Exchanges. Uniswap, Pancakeswap, Raydium
- DeFi platforms. Aave, GMX, Camelot, LidoFi, Compound, etc.
- DEX Aggrigators. Liquidswap, Jupiter, etc
- DAO platform. Olympus DAO
- cross-chain bridges
- crypto games. CoinFlip, Price prediction
- NFT dApps for minting, staking, trading, royalties, marketplace
Crypto bot systems
- Maket making bots: Volume, Holder, Ranking, Trending
- Auto trading bots: Copy trading, New token Sniping
- Notification bots
Polymarket trading bot
- Market maker
- Arbitrage
- News/sentiment
- Mispricing / calibration
- Portfolio rebalancer
I enjoy working with clients and building long-term relationships.
I've helped numerous clients build successful projects.
Share your great ideas now and let's make them happen together.
Keep your assets and information safe
Cryptocurrency services focus solely on developing and programming. Never share sensitive information or private keys with others.
My Portfolio
FAQ
I’m new to blockchain. Can you still help me?
Absolutely! I can guide you step by step — from idea to launch — even if you’re a complete beginner.
Which blockchains do you work with?
I work across multiple chains, including Ethereum, Binance Smart Chain, Solana, Polygon, Avalanche, and more. If you have a specific chain in mind, just let me know.
Can you build a full project from scratch?
Yes. I can handle everything from smart contract development, backend and frontend integration, to deploying on mainnet/testnet.
Do you provide ongoing support after delivery?
Yes. I offer post-delivery support packages to help you with bug fixes, updates, and improvements.
Can you audit or review my existing smart contracts?
Of course. I can review, optimize, and enhance your smart contracts to make sure they are secure and efficient.
What if I don’t have a clear idea yet?
No problem! I’ll work with you to brainstorm and shape your concept into a practical, launch-ready solution.
Do you help with launching tokens (ICO/IDO)?
Yes. I can create and deploy tokens, set up ICO/IDO smart contracts, and integrate them with launchpads like Pumpfun, LetsBonk, and Pinksale.
Can you build custom trading bots?
Yes. I develop various bots — including sniper bots, copy trading bots, DCA bots, and Telegram/Discord alert bots — tailored to your needs.
Do you provide documentation and instructions?
Yes. Every delivery includes clear documentation so you can understand and manage your project.
How do we get started?
Simply send me a message with your idea or requirements. I’ll analyze it and provide a tailored plan with a clear timeline and cost.
Reviews
12 reviews for this Gig
| (11) | ||
| (0) | ||
| (0) | ||
| (1) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
J 
javideas10
United States
Marko is an incredible versatil dev. H will deliver wta you need and will fix anything you need fixed. He is smart and dedicated to his craft. I highly reccomend Marko to anyone looking for a professional dev who will go above and beyond to deliver what you need. Very understanding and communicative and delivers very fast he is amazing.
$800-$1,000
Price
3 weeks
Duration
M 
Seller's Response
Helpful?M 
merkulovs
United Kingdom
Order Canceled
Unfortunately, the provided bot did not function as expected — fees were charged, but there was no impact and no generated volume
$50-$100
Price
3 days
Duration
M Seller's Response
Helpful?B 
beningo_m
Spain
Marko completed alert bot on pumpfun. I will work with him again.
Up to $50
Price
2 days
Duration
Helpful?J 
jimicohen
Kenya
Marko did a highly professional job, he absolutely nailed it and is a top notch developer I would recommend to anyone that requires his web3 services. Responsive & reasonable when I communicate with him. Transparent & talented, definitely worth it & a great collaboration.
$600-$800
Price
10 days
Duration
M Seller's Response
Helpful?X xiumeid
Repeat Client
Singapore
Absolutely outstanding work! Marko built a mixed Solana volume bot for me that works flawlessly. The bot handles multiple wallets, smart trade routing, and dynamic volume generation with perfect precision.
Up to $50
Price
2 days
Duration
M Seller's Response
Helpful?
Reviews
12 reviews for this Gig
| (11) | ||
| (0) | ||
| (0) | ||
| (1) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
J javideas10
United States
Marko is an incredible versatil dev. H will deliver wta you need and will fix anything you need fixed. He is smart and dedicated to his craft. I highly reccomend Marko to anyone looking for a professional dev who will go above and beyond to deliver what you need. Very understanding and communicative and delivers very fast he is amazing.
$800-$1,000
Price
3 weeks
Duration
M Seller's Response
Helpful?M merkulovs
United Kingdom
Order Canceled
Unfortunately, the provided bot did not function as expected — fees were charged, but there was no impact and no generated volume
$50-$100
Price
3 days
Duration
M Seller's Response
Helpful?B beningo_m
Spain
Marko completed alert bot on pumpfun. I will work with him again.
Up to $50
Price
2 days
Duration
Helpful?J jimicohen
Kenya
Marko did a highly professional job, he absolutely nailed it and is a top notch developer I would recommend to anyone that requires his web3 services. Responsive & reasonable when I communicate with him. Transparent & talented, definitely worth it & a great collaboration.
$600-$800
Price
10 days
Duration
M Seller's Response
Helpful?X xiumeid
Repeat Client
Singapore
Absolutely outstanding work! Marko built a mixed Solana volume bot for me that works flawlessly. The bot handles multiple wallets, smart trade routing, and dynamic volume generation with perfect precision.
Up to $50
Price
2 days
Duration
M Seller's Response
Helpful?
