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108 anonymous candidates

Smart Contract Engineer

  • Ukraine, Odesa
  • 5+ years
  • $84k ($7k / month)
  • Upper intermediate
Core technical skills
Blockchain
Node.js
JavaScript
React.js
Web3
Solidity
Achievements / Key results
 Joined public audit contests and contributed to secure web3 ecosystems.  Optimized DEX smart contracts and GameFi interactions; successfully identified and mitigated critical exploits, contributing to a 20% reduction in security breaches during competitive hackathons.  Enhanced security protocols and identified vulnerabilities in DeFi and GameFi ecosystems; secured top 3 placements in 5+ security contests, showcasing expertise in decentralized platforms. Achievement  Found 22 issue (13 High, 9 Medium) in 10x contests, 5 times Top 10,  Gamma Stacking: Awarded Bronze Medal, Panoptic Pool: Selected standard report Participated in web3 hackathon (CrossFinance) and won 6th position in DeFi domain.
Considering roles
FULL STACK
BACKEND
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Security Researcher

    Jan 2024 - current time1 year 3 months

  • Security Researcher

    Dec 2023 - current time1 year 4 months

  • Smart Contract Engineer

    Apr 2021 - Sep 20221 year 6 months

AAaa

  • United States, Poland
  • 1-3 years
  • $34.4k ($2.9k / month)
  • Pre intermediate
Core technical skills
AWS
Functional testing
manual testing
GraphQL
Blockchain
Achievements / Key results
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Considering roles
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • aaaa

    Mar 2002 - current time23 years 1 month

5+

Popular candidate! Connected by 5+ companies

  • Poland, Kraków
  • Less than 1 year
  • $12k ($1000 / month)
  • Elementary
Core technical skills
Mobile testing
Web3
MongoDB
Blockchain
Objective-C
Achievements / Key results
csac
Considering roles
PM
FULL STACK
DEVOPS
MOBILE
FRONTEND
BACKEND
QA
UI/UX DESIGN
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • dvs

    Dec 2028 - current time-44 months

qa

5+

Popular candidate! Connected by 5+ companies

  • Spain, Barcelona
  • 1-3 years
  • $60k ($5k / month)
  • Intermediate
Core technical skills
Black box testing
Kafka
Kubernetes
Design thinking
Blockchain
Achievements / Key results
FFGFG
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

    Feb 2025 - current time2 months

aassa

5+

Popular candidate! Connected by 5+ companies

  • United States, Cincinnati
  • 3-5 years
  • $20k ($1.7k / month)
  • Intermediate
Core technical skills
manual testing
RxSwift
API testing
AWS
Blockchain
Achievements / Key results
dasfcsdfcsddsadas
Considering roles
DEVOPS
MOBILE
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • asssdaa

    Mar 2000 - current time25 years 1 month

Blockchain engineer

5+

Popular candidate! Connected by 5+ companies

  • United Kingdom, London
  • 5+ years
  • $96k ($8k / month)
  • Advanced
Core technical skills
Blockchain
Solana
Rust
web3
TypeScript
Node.js
Achievements / Key results
Smart contracts in MEV trading bot, Gaming, NFT, DeFi, DEX & DEX aggregator
Considering roles
FULL STACK
BACKEND
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior blockchain engineer

    Apr 2023 - Dec 20241 year 9 months

Senior Front end Developer

5+

Popular candidate! Connected by 5+ companies

  • Poland, Warsaw
  • 5+ years
  • $96k ($8k / month)
  • Advanced
Core technical skills
JavaScript
TypeScript
React.js
Blockchain
HTML & CSS
Achievements / Key results
Full application rewrite & redesign w/ modern & latest versioned tech stack Addition of the convertor layer for integration of the legacy BE w/ modern FE
Considering roles
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior Front-end developer

    Jul 2022 - current time2 years 9 months

  • Senior Front-end developer

    Dec 2020 - Jul 20221 year 8 months

  • Front-end developer

    Dec 2017 - Dec 20203 years 1 month

Senior Blockchain Full Stack Software Engineer

10+

Popular candidate! Connected by 10+ companies

  • United States, Phoenix
  • 5+ years
  • $120k ($10k / month)
  • Advanced
Core technical skills
Blockchain
Python
React.js
Node.js
JavaScript
TypeScript
Docker
Solidity
Solana
Django
CI/CD
Web3
jQuery
Angular.js
Flask
Achievements / Key results
Successfully contributed to the development of Launch Legends and RetroCraft, two major projects that advanced blockchain innovation and decentralized application development. Delivered scalable and secure smart contract solutions on Ethereum and Solana, supporting NFT marketplaces and DeFi applications with millions of dollars in transaction volume. Spearheaded the implementation of cross-chain interoperability solutions, enhancing seamless asset transfer and collaboration between different blockchain networks. Played a pivotal role in developing zero-knowledge proof systems to improve privacy and efficiency in decentralized systems. Worked with top-tier companies like Ripple, where I contributed to blockchain-powered payment systems, streamlining cross-border transactions. Earned certifications in blockchain and cloud technologies, solidifying expertise in cutting-edge tools and protocols.
Considering roles
FULL STACK
PM
FRONTEND
BACKEND
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior Blockchain Engineer ՄTeam Lead)

    Apr 2024 - current time1 year

  • Senior Web3 Blockchain Developer

    Feb 2020 - Feb 20244 years 1 month

  • Blockchain Engineer

    Sep 2018 - Nov 20191 year 3 months

  • Senior Full Stack Engineer

    Feb 2016 - Jun 20182 years 5 months

  • Software Engineer

    Jul 2014 - Feb 20161 year 8 months

Principal engineer

15+

Popular candidate! Connected by 15+ companies

  • Ukraine, Lviv
  • 5+ years
  • $110k ($9.2k / month)
  • Advanced
Core technical skills
JavaScript
Distributed Systems
Blockchain
AWS Serverless
Kubernetes
Kotlin
React.js
React Native
Achievements / Key results
- Selected and integrated a cryptosystem that fits storage and CPU requirements - Built encryption libraries as POC, rebuilt into production-ready versions - Built backend microservice and a POC mobile app for location tracking
Considering roles
BACKEND
DEVOPS
FULL STACK
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Principal engineer

    Oct 2021 - Jul 202210 months

Full Stack Web3 Developer

5+

Popular candidate! Connected by 5+ companies

  • India, Bengaluru
  • 1-3 years
  • $42k ($3.5k / month)
  • Upper intermediate
Core technical skills
Solidity
React.js
Node.js
MongoDB
Rust
TypeScript
JavaScript
API testing
Blockchain
Web3
Achievements / Key results
Improved Performance Metrics: Boosted the performance of in defi application, increasing the performance rating from 40 to 70 through optimization techniques and efficient code refactoring. Real-Time System Implementation: Designed and developed a Points and Score system for the ecosystem using Node.js, Express.js, MongoDB, and ethers.js, enabling real-time updates based on blockchain events
Considering roles
FRONTEND
FULL STACK
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Frontend Web3 Devloper

    Apr 2024 - current time1 year

The coolest developer

5+

Popular candidate! Connected by 5+ companies

  • United Kingdom, Cambridge
  • 5+ years
  • $215.5k ($18k / month)
  • Upper intermediate
Core technical skills
JavaScript
React.js
HTML & CSS
TypeScript
MySQL
Node.js
API testing
SASS
manual testing
AWS
Solidity
Mobile testing
Python
Java
Redux
PostgreSQL
Web3
Docker
MongoDB
Smoke testing
GraphQL
Blockchain
Vue.js
Functional testing
Angular.js
React Native
Express.js
CI/CD
PHP
Spring
Usability testing
Regression testing
Rust
Hibernate
Responsive design
Android
Swift
Sanity testing
Bootstrap
Qa
Wireframing
Firebase
SwiftUI
Flutter
Automation testing
C++
SDLC
DevOps
Solana
Unit Testing
Test Case Design
Ruby
Algorithms / Data Structures
RxSwift
Go
Mobile Design App
Human Interface Guidelines
Design system
Kotlin
Black box testing
Achievements / Key results
Dog
Ready to work
remotely

Middle Frontend developer

5+

Popular candidate! Connected by 5+ companies

  • United Kingdom, Cambridge
  • 3-5 years
  • $200k ($16.7k / month)
  • Advanced
Core technical skills
React.js
JavaScript
HTML & CSS
TypeScript
MySQL
Node.js
API testing
SASS
manual testing
AWS
Solidity
Mobile testing
Python
Java
Redux
PostgreSQL
Web3
Docker
MongoDB
Smoke testing
GraphQL
Blockchain
Vue.js
Functional testing
Angular.js
React Native
Express.js
CI/CD
Achievements / Key results
Lots of money
Ready to work
remotely

Eius dolor est earum

5+

Popular candidate! Connected by 5+ companies

  • Poland, Kraków
  • Less than 1 year
  • $50k ($4.2k / month)
  • Elementary
Core technical skills
RxJava
Express.js
Redux
RxSwift
Black box testing
Blockchain
Achievements / Key results
kjujhikvsjbdkjmhwabkhbdlqJW
Considering roles
FULL STACK
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • QA

    Feb 2020 - current time5 years 2 months

qa

10+

Popular candidate! Connected by 10+ companies

  • India, Hyderabad
  • 1-3 years
  • $123.1k ($10.3k / month)
  • Pre intermediate
Core technical skills
Docker
Smoke testing
Blockchain
JavaScript
React.js
Achievements / Key results
cgjh
Considering roles
MOBILE
QA
Ready to work
remotely
i̇stanbul
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • qa

    Feb 2020 - current time5 years 2 months

Senior DevOps Engineer

10+

Popular candidate! Connected by 10+ companies

  • United States, Chicago
  • 5+ years
  • $216k ($18k / month)
  • Advanced
Core technical skills
Java
Docker
Blockchain
C++
Microservices
Achievements / Key results
I do not remember already
Considering roles
DEVOPS
FULL STACK
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior DevOps engineer

    Jan 1999 - current time26 years 3 months

qaa

30+

Popular candidate! Connected by 30+ companies

  • Ukraine, Kyiv
  • 1-3 years
  • $17k ($1.4k / month)
  • Upper intermediate
Core technical skills
manual testing
GraphQL
SASS
Blockchain
React Native
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
Considering roles
FULL STACK
QA
Ready to work
remotely
würzburg

Developer

5+

Popular candidate! Connected by 5+ companies

  • United States, San Francisco
  • 1-3 years
  • $24k ($2k / month)
  • Pre intermediate
Core technical skills
TypeScript
Docker
HTML & CSS
Blockchain
Functional testing
Achievements / Key results
d
Considering roles
FULL STACK
Ready to work
remotely
san francisco
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • ssddff

    Mar 2012 - current time13 years 1 month

Senior Full stack developer

40+

Popular candidate! Connected by 40+ companies

  • Georgia, Tbilisi
  • 5+ years
  • $60k ($5k / month)
  • Upper intermediate
Core technical skills
React.js
Redux
MongoDB
Node.js
Blockchain
web3
Solidity
Solana
PHP
Laravel
JavaScript
C#
HTML & CSS
TypeScript
Achievements / Key results
As a senior full-stack web developer, here are some examples of key results you might have helped your product achieve and how you contributed to them: 1. Improved Application Performance Key Result: Reduced server response time by 30%, leading to a 20% increase in user retention. Contribution: Optimized backend queries and implemented caching mechanisms using Redis. Refactored code to follow SOLID principles, reducing technical debt. Conducted performance testing and identified bottlenecks using tools like Postman and JMeter. 2. Enhanced User Engagement Key Result: Increased daily active users (DAUs) by 40% within three months of launching a new feature. Contribution: Designed and developed an intuitive and responsive user interface using React/Angular and Tailwind CSS. Implemented gamification features (e.g., leaderboards, achievements) to encourage engagement. Collaborated with the product team to fine-tune user experience through A/B testing. 5. Strengthened Security and Compliance Key Result: Passed third-party security audits and achieved 100% GDPR compliance. Contribution: Implemented OWASP-recommended practices for secure coding. Added two-factor authentication (2FA) and role-based access controls (RBAC). Developed scripts to anonymize and encrypt sensitive user data in backups. 3. Accelerated Feature Delivery Key Result: Delivered 15+ new features in six months, cutting release cycles by 50%. Contribution: Built reusable components to speed up frontend development in React and Angular. Set up CI/CD pipelines using GitHub Actions and Jenkins to automate testing and deployments. Implemented API-first development, ensuring seamless collaboration between frontend and backend teams. 4. Boosted Revenue Through Scalability Key Result: Scaled the platform to handle 5x traffic growth, contributing to a 25% revenue increase. Contribution: Migrated monolithic architecture to microservices using Node.js and Docker. Integrated load balancers and auto-scaling groups in AWS for high availability. Conducted stress testing to ensure stability during peak loads.
Considering roles
FULL STACK
FRONTEND
MOBILE
BACKEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior Blockchain Developer

    Jan 2023 - Nov 20241 year 11 months

  • Senior Mobile Developer

    Jun 2020 - Dec 20222 years 7 months

  • Senior Web Developer

    Jun 2019 - May 20201 year

At quod sit vel ani 666

10+

Popular candidate! Connected by 10+ companies

  • Ukraine, Ukrainka
  • 1-3 years
  • $50k ($4.2k / month)
  • Intermediate
Core technical skills
TypeScript
Cocoapods
Blockchain
MongoDB
Firebase
Achievements / Key results
Aliquid anim provide
Considering roles
FULL STACK
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • senjor full stack

    Feb 1980 - current time45 years 2 months

wqw

10+

Popular candidate! Connected by 10+ companies

  • India, Tiruchirappalli
  • 3-5 years
  • $20k ($1.7k / month)
  • Intermediate
Core technical skills
Hibernate
Design thinking
Blockchain
GraphQL
PHP
Achievements / Key results
213
Considering roles
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • 323

    Mar 1990 - current time35 years 1 month
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