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239 anonymous candidates

Software Engineer

  • Kazakhstan, Almaty
  • 3-5 years
  • $80k ($6.7k / month)
  • Advanced
Core technical skills
Node.js
React.js
Docker
Testing
Typescript
API TESTING
Mobile testing
Angular.js
PostgreSQL
Express.js
Web3
Redis
Kafka
React Native
Blockchain
Achievements / Key results
Operating 29 production blockchain nodes across 4 consensus paradigms (EVM, Solana, Bitcoin, Substrate) — private internal infrastructure, details under NDA Built Arctic Pay (arcticpay.app) — live USDT→USD virtual card platform processing $10K+ on-chain with 80+ active users and zero double-charge incidents Built Vneshka (fr-vneshka.com) — real-time freelance marketplace with 893 registered users and arbitration queue system Built Prime Electronics (prime-electronics.ru) — e-commerce platform with 12K-product catalog and Excel bulk import/export Shipped 10+ production platforms in 3 years as founding engineer at a 4-engineer product studio Own backend + infrastructure end-to-end on every project (PostgreSQL → NestJS → Next.js → Docker → CI/CD → VPS) Integrated 7 payment providers (Stripe, YooKassa, T-Bank, Pagsmile, HGROSH, Telegram Stars, TronWeb) with HMAC validation + idempotency + state machines Cut manual deployment time 90% via GitHub Actions CI/CD + Docker multi-stage builds Led architectural decisions (stack selection, schema design, infrastructure) across all Spark Studio platforms Diagnosed and fixed version-level blockchain client bugs in production (Moonriver mapping-sync stall, Lodestar Fulu fork, OP-Stack derivation bottleneck)
Considering roles
DEVOPS
FRONTEND
BACKEND
FULL STACK
MOBILE
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Full-stack Engineer

    Mar 2023 - current time3 years 2 months

QA

  • Italy, Assisi
  • Less than 1 year
  • $56k ($4.7k / month)
  • Pre intermediate
Core technical skills
Gffdssdsdsljhffffdddd
Dfggg
PostgreSQL
HTML & CSS
Blockchain
Achievements / Key results
sdvsdv
Considering roles
FULL STACK
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • qa

    Jan 2006 - current time20 years 4 months

HR

5+

Popular candidate! Connected by 5+ companies

  • United Kingdom, London
  • 1-3 years
  • $120k ($10k / month)
  • Intermediate
Core technical skills
Functional testing
GraphQL
Angular.js
Blockchain
Usability testing
Achievements / Key results
• I have a pet project with more than 60k users • Delivered / took part in ~40 iOS/macOS apps in 7 years • Each time I start on a project I end up leading it • Leading a mobile team of a product with 1M+ DAU
Considering roles
DEVOPS
FULL STACK
FRONTEND
MOBILE
Ready to work
remotely

HR

5+

Popular candidate! Connected by 5+ companies

  • United Kingdom, London
  • 1-3 years
  • $120k ($10k / month)
  • Pre intermediate
Core technical skills
Functional testing
GraphQL
Angular.js
Blockchain
Usability testing
Achievements / Key results
AAAAAAAA
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 1999 - current time27 years 3 months

Senior Backend Engineer

5+

Popular candidate! Connected by 5+ companies

  • Ukraine, Lviv
  • 5+ years
  • $84k ($7k / month)
  • Upper intermediate
Core technical skills
Node.js
TypeScript
PostgreSQL
RabbitMQ
Blockchain
web3
Achievements / Key results
- Built a multi-chain trading backend from scratch supporting 7 blockchains and 15+ DEX integrations as the sole backend engineer. - Designed blockchain indexers with <200ms latency and achieved 0-slot transaction inclusion on Solana. - Adopted AI-driven development workflow, achieving 3x faster feature delivery and 5x reduction in debugging time.
Considering roles
BACKEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior Backend Engineer

    Jun 2023 - current time2 years 11 months

  • Backend Developer

    Nov 2018 - May 20234 years 7 months

Qui minima eum sunt

  • Ukraine, Lviv
  • 1-3 years
  • $10k ($833 / month)
  • Pre intermediate
Core technical skills
MongoDB
Flutter
Smoke testing
Blockchain
Java
Node.js
Achievements / Key results
• I have a pet project with more than 60k users • Delivered / took part in ~40 iOS/macOS apps in 7 years • Each time I start on a project I end up leading it • Leading a mobile team of a product with 1M+ DAU
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • 23

    Feb 2025 - current time1 year 3 months

Senior Full Stack Enginner | Web3 & Blockchain

25+

Popular candidate! Connected by 25+ 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

5+

Popular candidate! Connected by 5+ companies

  • 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 time10 months

  • Penetration tester

    Jan 2022 - current time4 years 4 months

QA

10+

Popular candidate! Connected by 10+ 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 2 months

QA engineer 0024

5+

Popular candidate! Connected by 5+ companies

  • Brazil, Foz do Iguaçu
  • Less than 1 year
  • $12k ($1000 / month)
  • Elementary
Core technical skills
Smoke testing
Node.js
Blockchain
MySQL
Flutter
Achievements / Key results
Achievements 0024
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Role 0024

    Jan 2020 - current time6 years 4 months

QA

5+

Popular candidate! Connected by 5+ companies

  • Netherlands, Amsterdam
  • 1-3 years
  • $30k ($2.5k / month)
  • Upper intermediate
Core technical skills
SASS
manual testing
Functional testing
Blockchain
Usability testing
Achievements / Key results
Hello world
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • QA

    Mar 2099 - current time-874 months

QA

15+

Popular candidate! Connected by 15+ companies

  • 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 4 months

qa

10+

Popular candidate! Connected by 10+ companies

  • Ukraine, Lviv
  • 3-5 years
  • $100k ($8.3k / month)
  • Intermediate
Core technical skills
manual testing
RxSwift
Qa
ReactiveSwift
Docker
Human Interface Guidelines
ActiveMQ
Mobile testing
Blockchain
qqq
jQuery
MS SQL Server
Swift
Web3
Functional testing
Achievements / Key results
• Optimised map functionality for faster rendering of 3k items
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • dj

    Feb 2016 - current time10 years 3 months

solana blockchain developer

15+

Popular candidate! Connected by 15+ companies

  • Türkiye, Van
  • Less than 1 year
  • $48k ($4k / month)
  • Upper intermediate
Core technical skills
Solana
Blockchain
Rust
React.js
JavaScript
Achievements / Key results
Designed and implemented multiple Solana smart contracts using Rust + Anchor, including vault, staking, and escrow patterns, with full test coverage and production-ready account layouts. Built end-to-end DeFi prototypes (on-chain programs + client integration), focusing on correctness, edge cases, and safe token handling using SPL and Token-2022.
Considering roles
FULL STACK
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • blockchain developer

    Mar 2024 - current time2 years 2 months

Junior QA Engineer

10+

Popular candidate! Connected by 10+ companies

  • Ukraine, Kyiv
  • Less than 1 year
  • $12k ($1000 / month)
  • Pre intermediate
Core technical skills
HTML & CSS
Python
Blockchain
Design thinking
Ad Hoc testing
Achievements / Key results
I have a pet project with more than 60k users Delivered / took part in ~40 iOS/macOS apps in 7 years
Considering roles
QA
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Manager

    Feb 2023 - Feb 20252 years 1 month

Senior QA-Manager

25+

Popular candidate! Connected by 25+ companies

  • Ukraine, Kyiv
  • Less than 1 year
  • $36k ($3k / month)
  • Pre intermediate
Core technical skills
Hibernate
PHP
Blockchain
Design thinking
Human Interface Guidelines
Achievements / Key results
123
Considering roles
FRONTEND
FULL STACK
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • qa

    Mar 1925 - current time101 years 2 months

Senior QA-Manager

15+

Popular candidate! Connected by 15+ companies

  • United States, Los Angeles
  • 5+ years
  • $36k ($3k / month)
  • Advanced
Core technical skills
Human Interface Guidelines
PHP
Blockchain
Hibernate
GraphQL
Achievements / Key results
123
Considering roles
MOBILE
Ready to work
remotely
london
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior

    Mar 2006 - Apr 2222216 years 2 months

sdf

15+

Popular candidate! Connected by 15+ companies

  • Germany, Düsseldorf
  • 1-3 years
  • $6k ($500 / month)
  • Elementary
Core technical skills
GraphQL
Functional testing
Angular.js
Blockchain
React Native
Achievements / Key results
sdf
Considering roles
DEVOPS
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • dfd

    Jan 2000 - current time26 years 4 months

Senior Web3 Engineer

50+

Popular candidate! Connected by 50+ companies

  • Malaysia, Kampar
  • 5+ years
  • $60k ($5k / month)
  • Advanced
Core technical skills
React.js
React Native
Node.js
Python
TypeScript
JavaScript
Blockchain
Web3
Solana
AWS
Vue.js
Angular.js
Java
PostgreSQL
Achievements / Key results
Built and scaled high-performance frontend applications using React and TypeScript, improving user experience and supporting steady user growth across Web3 and fintech products. Led development of reusable UI components and frontend architecture, reducing development time and improving consistency across multiple features and teams. Integrated APIs, blockchain data, and wallet functionality, enabling secure and reliable crypto transactions in production environments.
Considering roles
FRONTEND
FULL STACK
MOBILE
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Senior Web3 Trading Engineer

    Jul 2024 - current time1 year 10 months

  • Senior Web3 Engineer

    Apr 2023 - Jul 20241 year 4 months

  • Blockchain Game Developer

    Feb 2022 - Mar 20231 year 2 months

  • Fullstack Developer

    Mar 2018 - Feb 20224 years

test

35+

Popular candidate! Connected by 35+ 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 2 months
View 219 more candidates