Blockchain & Smart Contracts-
Developed and tested production-oriented Solidity smart contracts using Hardhat, OpenZeppelin, Ethers.js, and EVM-compatible networks.
Implemented ERC-20, ERC-721, AccessControl, and compliance-based smart contract functionality.
Successfully deployed and tested blockchain applications on VeChain Testnet.
GS1 & Supply Chain-
Built a GS1 EPCIS 2.0.1 processing pipeline that converts canonical supply-chain data into standardized EPCIS visibility events.
Preserved batch genealogy, transformation relationships, process-order relationships, and goods-receipt relationships during event mapping.
Implemented domain-based processing across Procurement, Production, and other supply-chain workflows.
Blockchain Integrity-
Designed a Blockchain Engine connecting EPCIS output with VeChain for batch-level integrity anchoring.
Implemented SHA-256 event hashing, Merkle root generation, and dataset-level integrity verification.
Kept EPCIS data and sensitive information off-chain, storing only cryptographic integrity anchors on-chain.
Testing & Quality-
Achieved 79 passing unit tests covering smart contracts, adapters, validation, and integrity functionality.
Achieved successful end-to-end testing using real GS1 Engine EPCIS output through the Blockchain Engine.
Implemented validation for GS1 identifiers, EPCIS events, CBV mappings, idempotency, and domain partitioning.
Web3 & Full-Stack Development-
Built decentralized applications using React, Node.js, Express, Solidity, MongoDB, IPFS, Ethers.js, and Web3.js.
Developed IPFS integrations supporting file uploads, metadata, multi-file uploads, progress tracking, previews, and gateway access.
Delivered complete Web3 workflows from smart contract development → backend integration → frontend integration → testing → testnet deployment.
Considering roles
FULL STACK
QA
BACKEND
Ready to work
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Experience
Software Development Intern
Jun 2026 - current time4 months
k'lj
India, Kolkata
1-3 years
$22.2k ($1.9k / month)
Pre intermediate
Core technical skills
Redux
Responsive design
Docker
CI/CD
Solidity
Achievements / Key results
sdfas
Considering roles
FULL STACK
Ready to work
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Experience
ss
Feb 2022 - current time4 years 8 months
1
Ukraine, Kyiv
Less than 1 year
$2.4k ($200 / month)
Intermediate
Core technical skills
Solidity
Responsive design
CI/CD
Android
Qa
Achievements / Key results
asdfasdf sdf asd s df asd fas dfda sdf asd
Considering roles
QA
Ready to work
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Experience
QA Engineer
Feb 2020 - current time6 years 8 months
QA Engineer
Apr 2018 - Apr 20202 years 1 month
blockchain developer
India, Pune
1-3 years
$100k ($8.3k / month)
Intermediate
Core technical skills
Solidity
Python
Java
Blockchain
JavaScript
Achievements / Key results
Build production level project .
merge 6 pr's in the ethereum .
selected in Google summer of code .
Considering roles
FULL STACK
BACKEND
Ready to work
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Experience
protocol testing
Jul 2026 - current time3 months
Web3/Web2 Fullstack Developer
Nigeria, Lagos
5+ years
$60k ($5k / month)
Advanced
Core technical skills
Solidity
TypeScript
React.js
Rust
JavaScript
MongoDB
Node.js
Blockchain
Achievements / Key results
Achievements / Key Results
Competitive builds
1st Place — Flare Hackathon · Airclaim
2nd Best Project — Vincent AI Agent Hackathon
Best Project — Surreal Buildathon, IP Protection & Enforcement Tool track
2nd Best Project — Avalanche EERC20 Bounty
Honourable Mention — Zora Coinathon
Grant recipient — Cartesi Grants Program
Security
Audited production codebases in six languages — Solidity, Rust, Clarity, C++, Move, C — inside a four-month stint at Nethermind
Built an AI agent for development workflows and smart contract security analysis
Triaged AI-scanned findings across live bug bounty programs and active audit contests
Confirmed findings on Code4rena, Cantina, and Sherlock
Wrote 20+ production Solidity contracts (NFT marketplaces, ERC-20s, Chainlink VRF, AMM swaps, staking, fractional NFTs, Merkle proofs, multisig) with Hardhat and Foundry test suites
Engineering
Converted a React SPA to SSR to unlock SEO and dynamic Open Graph previews; deployed on AWS S3 + CloudFront
Shipped full-stack products across fintech, edtech, healthtech, and e-commerce
Built a user-activity tracking tool (embeddable script), a link-auditing crawler, and a breaking-news video marketplace backend
Considering roles
FULL STACK
FRONTEND
BACKEND
Ready to work
remotely
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Experience
Intern
Feb 2026 - May 20264 months
Fullstack Engineer
Oct 2022 - Jun 20252 years 9 months
sad
United Arab Emirates, Dubai
1-3 years
$12.3k ($1k / month)
Pre intermediate
Core technical skills
Android
MongoDB
Redux
CI/CD
Solidity
Achievements / Key results
dds
Considering roles
DEVOPS
Ready to work
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Experience
ada
Feb 1984 - current time42 years 8 months
sfs
Spain, Ceuta
1-3 years
$2.4k ($200 / month)
Pre intermediate
Core technical skills
Swift
RxSwift
Flutter
Solidity
Node.js
Achievements / Key results
AFDF
Considering roles
DEVOPS
Ready to work
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Experience
AD
Jan 1984 - current time42 years 9 months
Junior qa
5+
Popular candidate! Connected by 5+ companies
Ukraine, Ternopil
Less than 1 year
$36k ($3k / month)
Pre intermediate
Core technical skills
Regression testing
Mobile testing
manual testing
API testing
React.js
HTML & CSS
Smoke testing
Python
Solidity
PostgreSQL
TypeScript
Swift
Flutter
Human Interface Guidelines
Rust
Achievements / Key results
wer
Considering roles
DEVOPS
QA
BACKEND
Ready to work
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Experience
qa
Apr 2025 - current time1 year 6 months
QA
15+
Popular candidate! Connected by 15+ companies
India, Raipur
Less than 1 year
$15k ($1.3k / month)
Elementary
Core technical skills
Smoke testing
Typography
Python
GraphQL
Solidity
Achievements / Key results
llll
Considering roles
QA
Ready to work
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Experience details are hidden. To make them visible, send a message to the candidate.
Experience
llll
Feb 2026 - current time8 months
QA
May 1995 - Mar 19982 years 11 months
vjvvjvj
Ukraine, Lviv
3-5 years
$7.2k ($600 / month)
Upper intermediate
Core technical skills
Solidity
PostgreSQL
React.js
MongoDB
Functional testing
Angular.js
Achievements / Key results
chchch
Considering roles
UI/UX DESIGN
QA
Ready to work
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Experience
hvhvh
Feb 1996 - Mar 19962 months
!!!!!!!!!!!!!!!
50+
Popular candidate! Connected by 50+ companies
Ukraine, Ternopil
1-3 years
$6.7k ($556 / month)
Pre intermediate
Core technical skills
React.js
HTML & CSS
Mobile testing
manual testing
JavaScript
API testing
MySQL
TypeScript
DevOps
PostgreSQL
Node.js
SASS
AWS
Smoke testing
Solidity
Achievements / Key results
YO MATEw
Considering roles
QA
Ready to work
remotely
hornchurch
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Experience
qa
Jan 1999 - current time27 years 9 months
QA Engineer
10+
Popular candidate! Connected by 10+ companies
Croatia, Zagreb
Less than 1 year
$3k ($250 / month)
Elementary
Core technical skills
Qa
MySQL
manual testing
Java
Solidity
HTML & CSS
Achievements / Key results
Developed new payment architecture using Stripe which generates core revenue
• Designed and managed the internationalization of application for 6 languages
• Reduced testing time by 5x by implementing infrastructure for writing integration tests
Considering roles
DEVOPS
FULL STACK
FRONTEND
MOBILE
BACKEND
QA
UI/UX DESIGN
DATA SCIENCE
PM
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Experience
dfdgfnhj
Jan 2100 - Feb 2300200 years 2 months
qa
Apr 2005 - May 20105 years 2 months
Quality Assurance
10+
Popular candidate! Connected by 10+ companies
Ukraine, Kyiv
3-5 years
$5k ($417 / month)
Upper intermediate
Core technical skills
API testing
Mobile testing
Swift
PostgreSQL
PHP
Java
Mobile Design App
Laravel
CI/CD
GraphQL
Automation testing
Hibernate
Solidity
RxCocoa
Objective-C
Achievements / Key results
• Optimised map functionality for faster rendering of 3k items
• Developed new payment architecture using Stripe which generates core revenue
• Designed and managed the internationalization of application for 6 languages
• Reduced testing time by 5x by implementing infrastructure for writing integration tests
Considering roles
QA
PM
MOBILE
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Experience
QA Engineer
Feb 2025 - current time1 year 8 months
bggfcbd
20+
Popular candidate! Connected by 20+ companies
Estonia, Kuivastu
5+ years
$6.8k ($566 / month)
Advanced
Core technical skills
Functional testing
RxSwift
Flutter
Swift
Solidity
Achievements / Key results
43532
Considering roles
DEVOPS
FRONTEND
MOBILE
BACKEND
FULL STACK
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UI/UX DESIGN
DATA SCIENCE
PM
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Experience
42
Jan 2323 - current time-3555 months
QA junior
10+
Popular candidate! Connected by 10+ companies
Poland, Wrocław
3-5 years
$10k ($833 / month)
Intermediate
Core technical skills
MongoDB
Android
Docker
Redux
Solidity
Achievements / Key results
c
Considering roles
QA
Ready to work
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