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311 anonymous candidates

Senior Full Stack Enginner | Web3 & Blockchain

5+

Popular candidate! Connected by 5+ companies

  • Australia, Melbourne
  • 5+ years
  • $96k ($8k / month)
  • Advanced
Core technical skills
React.js
Solidity
Node.js
web3
Blockchain
Achievements / Key results
- Successfully launched a token sale launchpad, raising $250K during the token sale. - Developed a spin game that increased user engagement by 900%. - Built Web3 infrastructure from the ground up, including seamless on-chain payment systems. - Integrated third-party Web3 libraries such as Privy and Li.Fi, and automated trading workflows on the platform. - Implemented a staking and governance platform, introducing innovative earning models such as stake-to-earn and burn-to-earn.
Considering roles
FULL STACK
FRONTEND
MOBILE
BACKEND
PM
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior Full Stack Engineer

    Feb 2024 - Jan 20262 years

  • Back End Engineer

    Jul 2023 - Jan 20247 months

  • Back End Engineer & Smart Contract Developer

    Apr 2023 - Aug 20235 months

  • Blockchain Full Stack Engineer

    Dec 2021 - Mar 20231 year 4 months

  • Smart Contract Developer

    Mar 2020 - Dec 20211 year 10 months

  • Softare Engineer (MERN)

    Jan 2019 - Jan 20201 year 1 month

  • Front End Developer

    Jul 2017 - Mar 20191 year 9 months

Security Engineer

  • Argentina, Buenos Aires
  • 1-3 years
  • $30k ($2.5k / month)
  • Upper intermediate
Core technical skills
Rust
Solidity
Python
Blockchain
manual testing
Achievements / Key results
- Developed 3 own tools for security researching - Provided more than 40 solo penetration tests - Helped 4 DeFi projects become more secure before deployment
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Security Researcher

    Jul 2025 - current time9 months

  • Penetration tester

    Jan 2022 - current time4 years 3 months

QA engineer

  • Mexico, Guadalajara
  • Less than 1 year
  • $36k ($3k / month)
  • Pre intermediate
Core technical skills
Solidity
Android
MongoDB
Responsive design
Design thinking
Achievements / Key results
dsds
Considering roles
DEVOPS
FULL STACK
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • ds

    Feb 2000 - current time26 years 2 months

boss

  • Ukraine, Kharkiv
  • Less than 1 year
  • $216k ($18k / month)
  • Advanced
Core technical skills
Responsive design
CI/CD
Solidity
MongoDB
Django
Achievements / Key results
ewewewe
Considering roles
DEVOPS
FULL STACK
Ready to work
frankfurt am main
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Boss developer

    Feb 2004 - current time22 years 2 months

QA

  • United States, Liberty
  • 1-3 years
  • $5k ($417 / month)
  • Pre intermediate
Core technical skills
Solidity
PostgreSQL
Smoke testing
Python
Functional testing
Achievements / Key results
lorem ipsum
Considering roles
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • qa

    Feb 2000 - current time26 years 2 months

Full-Stack Software Engineer

5+

Popular candidate! Connected by 5+ companies

  • India, Gandhinagar
  • 1-3 years
  • $70k ($5.8k / month)
  • Upper intermediate
Core technical skills
Go
Solidity
TypeScript
JavaScript
Java
JUnit
Spring
React.js
Express.js
PostgreSQL
MongoDB
Web3
Docker
Kubernetes
AWS
Achievements / Key results
Optimized backend architecture of a data-heavy platform, reducing data-fetch latency by ~95% by restructuring services and introducing Redis queues and worker nodes. Designed and implemented scalable backend APIs and asynchronous pipelines for AI-driven applications used by enterprise teams. Built TradeSphere, a real-time trading platform featuring an in-memory order book, trade matching engine, and WebSocket-based market data streaming, handling high-frequency updates and real-time market data efficiently. Built Zap, a developer productivity tool that automates workflows and simplifies repetitive development tasks, improving efficiency for engineering teams. Containerized applications using Docker and helped deploy reliable production infrastructure to improve system scalability and maintainability. Contributed to major open-source projects including Checkstyle, Meshery, and Kyverno, collaborating with global maintainers and shipping improvements to production codebases. Comfortable owning systems end-to-end architecture, implementation, deployment, and optimization.
Considering roles
DEVOPS
FULL STACK
BACKEND
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Full stack devloper

    Jan 2025 - current time1 year 3 months

  • Software Engineer

    May 2023 - Nov 20237 months

jkk

5+

Popular candidate! Connected by 5+ companies

  • Czechia, Prague
  • 1-3 years
  • $4k ($333 / month)
  • Upper intermediate
Core technical skills
MySQL
Flutter
Responsive design
MongoDB
Solidity
Achievements / Key results
good worker
Considering roles
DEVOPS
FULL STACK
QA
DATA SCIENCE
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • teacher

    Apr 1998 - current time28 years

QA engineerrrrr

  • United States, New York
  • 1-3 years
  • $12k ($1000 / month)
  • Intermediate
Core technical skills
Docker
Redux
Solidity
Android
MongoDB
Achievements / Key results
1234
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • d

    Feb 2020 - current time6 years 2 months

  • d

    Jan 2020 - current time6 years 3 months

QA engineer

5+

Popular candidate! Connected by 5+ companies

  • Brazil, Florianópolis
  • Less than 1 year
  • $12k ($1000 / month)
  • Pre intermediate
Core technical skills
MongoDB
Swift
JavaScript
Angular.js
Solidity
Achievements / Key results
bjn
Considering roles
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • fds

    Jan 2020 - current time6 years 3 months

QA

5+

Popular candidate! Connected by 5+ companies

  • Ukraine, Kovel'
  • 1-3 years
  • $7.2k ($600 / month)
  • Pre intermediate
Core technical skills
manual testing
HTML & CSS
React.js
TypeScript
Docker
Automation testing
Blockchain
PHP
JavaScript
Smoke testing
Functional testing
Solidity
PostgreSQL
jQuery
CI/CD
Achievements / Key results
qqq
Considering roles
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • QA

    Mar 2025 - current time1 year 1 month

QA engineer 0028

5+

Popular candidate! Connected by 5+ companies

  • Germany, Düsseldorf
  • Less than 1 year
  • $12k ($1000 / month)
  • Elementary
Core technical skills
Smoke testing
Solidity
Redux
Node.js
TypeScript
Achievements / Key results
Achievements / Key results 0028
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Role 0028

    Jan 2020 - current time6 years 3 months

QA engineer 0022

  • United Arab Emirates, Dubai
  • Less than 1 year
  • $12k ($1000 / month)
  • Pre intermediate
Core technical skills
Docker
PostgreSQL
Solidity
JavaScript
Responsive design
Achievements / Key results
Achievements0022
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Role0022

    Jan 2020 - current time6 years 3 months

QA

  • Ukraine, Kovel'
  • Less than 1 year
  • $7.2k ($600 / month)
  • Elementary
Core technical skills
Docker
API testing
manual testing
Solidity
Mobile testing
Achievements / Key results
в
Considering roles
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Qa

    Feb 2025 - current time1 year 2 months

QA

  • United States, New York
  • 1-3 years
  • $28.8k ($2.4k / month)
  • Pre intermediate
Core technical skills
Solidity
Smoke testing
Mobile testing
Functional testing
Blockchain
Achievements / Key results
tyu
Considering roles
FULL STACK
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • QA

    Jan 2009 - current time17 years 3 months

fthfh

5+

Popular candidate! Connected by 5+ companies

  • Germany, Hamburg
  • 1-3 years
  • $45.5k ($3.8k / month)
  • Pre intermediate
Core technical skills
RxSwift
Functional testing
manual testing
Automation testing
GraphQL
Algorithms / Data Structures
Black box testing
Python
Solidity
Responsive design
PHP
Node.js
Design thinking
Angular.js
Ad Hoc testing
Achievements / Key results
cdfhfdh
Considering roles
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • eer

    Feb 1926 - current time100 years 2 months

q

5+

Popular candidate! Connected by 5+ companies

  • Poland, Warsaw
  • 1-3 years
  • $2.4k ($200 / month)
  • Pre intermediate
Core technical skills
jQuery
MongoDB
Docker
Solidity
Node.js
Achievements / Key results
uuu
Considering roles
FULL STACK
QA
UI/UX DESIGN
DATA SCIENCE
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • erger

    Mar 2007 - current time19 years 1 month

Senior Software Engineer

50+

Popular candidate! Connected by 50+ companies

  • Indonesia, Jakarta
  • 5+ years
  • $60k ($5k / month)
  • Upper intermediate
Core technical skills
Go
TypeScript
Solidity
React.js
JavaScript
PostgreSQL
AWS
Achievements / Key results
● Three-time Founding Engineer with a recent achievement of successfully architecting and developing Pintu's Web3 swap across major chains, facilitating over $260K in total swap volume. ● Founding Engineer for Pintu Earn, also successfully architected and developed a flexible earn with an AUM of more than 18 million USD, and a locked earn with an AUM of more than $600k. ● Restructured the eFresh Business in collaboration with the CEO of eFishery, Head of Product, and VP of Fresh to eliminate bottlenecks in software development.
Considering roles
FULL STACK
BACKEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior Software Engineer

    Dec 2025 - current time4 months

  • Software Engineer III

    Oct 2021 - Nov 20254 years 2 months

  • Technical Lead

    Jun 2019 - Oct 20212 years 5 months

  • Blockchain Engineer

    Feb 2019 - Jun 20195 months

  • Software Engineer

    Feb 2018 - Feb 20191 year 1 month

test

25+

Popular candidate! Connected by 25+ companies

  • India, Hyderabad
  • 1-3 years
  • $210k ($17.5k / month)
  • Intermediate
Core technical skills
HTML & CSS
React.js
Usability testing
MongoDB
GraphQL
Python
JavaScript
Objective-C
Node.js
Blockchain
Java
Solidity
TypeScript
manual testing
Redux
Achievements / Key results
---
Considering roles
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • rr

    Mar 2003 - current time23 years 1 month

QA

20+

Popular candidate! Connected by 20+ companies

  • Argentina, 9 de Julio
  • Less than 1 year
  • $7.2k ($600 / month)
  • Intermediate
Core technical skills
jQuery
ActiveMQ
Solidity
Functional testing
Laravel
Achievements / Key results
asd
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • qwa

    Jan 2000 - current time26 years 3 months

Frontend Blockchain Developer <​Next, React​> // <​Solidity​>

5+

Popular candidate! Connected by 5+ companies

  • Moldova, Chișinău
  • 1-3 years
  • $48k ($4k / month)
  • Upper intermediate
Core technical skills
React.js
Web3
Blockchain
JavaScript
Solidity
Achievements / Key results
1. Enabled full cross-chain DeFi functionality and improved user reach • Result: The product evolved from single-chain usage to a multi-chain DeFi platform, supporting swaps, bridges, deposits, and transfers across EVM, Cosmos, Solana, and Bitcoin ecosystems. • My contribution: - Integrated LiFi SDK and built a custom LiFi Widget fork for cross-chain swaps and bridges - Implemented Orderly cross-chain deposit flows - Built Wormhole-based bridges (Ethereum ↔ Polygon ↔ Base) - Ensured safe transaction execution using Safe SDK multisig 2. Improved product reliability, security, and scalability • Result: Reduced operational risks and improved stability for production usage. • My contribution: - Built secure Nest.js proxy endpoints to protect API keys and sensitive integrations - Designed transaction flows with account abstraction and intent-based execution - Refactored and optimized frontend architecture using Vite, Zustand, and modern Web3 tooling (Wagmi, Viem) 3. Increased user adoption through better UX and performance • Result: More intuitive onboarding and smoother user journeys for non-technical users. • My contribution: - Delivered full redesigns (KIMA Explorer, Hub, Claim, Bridge) focusing on clarity and performance - Implemented SSR-safe wallet flows in Next.js - Built responsive, production-grade UI using Tailwind, SCSS, MUI, Framer Motion 4. Enabled new revenue streams and business features • Result: The product expanded beyond pure DeFi into payments, staking, and incentives. • My contribution: - Implemented crypto credit-card top-up logic (Mobilum integration) - Built staking & incentive platforms with MLM-style reward logic and admin dashboards - Developed admin panels to manage campaigns, staking pools, and bridge operations 5. Accelerated delivery and reduced time-to-market • Result: Faster feature releases with fewer regressions. • My contribution: - Took ownership of features end-to-end (architecture → implementation → integration) - Worked closely with backend and protocol teams to unblock releases - Proactively improved developer experience and reduced technical debt
Considering roles
FRONTEND
Ready to work
remotely
chișinău
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Frontend Blockchain Developer

    Apr 2024 - Jan 20261 year 10 months

  • Frontend x Solidity Blockchain Developer

    Feb 2023 - Apr 20241 year 3 months
View 291 more candidates