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241 anonymous candidates

fullstack/frontend developer

  • Poland, Mikołów
  • 1-3 years
  • $36k ($3k / month)
  • Advanced
Core technical skills
React.js
Node.js
TypeScript
OOP
Blockchain
Firebase
MongoDB
Achievements / Key results
Built and launched a personal SaaS product with active paying customers Independently delivered end-to-end features in a production environment Implemented multiple robust solutions to complex problems in production systems Contributed to key technical decision-making and architectural direction
Considering roles
FULL STACK
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • Full-stack engineer

    Aug 2024 - current time1 year 10 months

QA

  • Canada, Toronto
  • 1-3 years
  • $20k ($1.7k / month)
  • Intermediate
Considering roles
FULL STACK
Core technical skills
qa
Python
PostgreSQL
SQL Destinct
MS SQL Server
Hibernate
PHP
Design thinking
Blockchain
Algorithms / Data Structures
Machine Learning
Ad Hoc testing
Typography
Angular.js
Dhhrhdhdhdhrhrhrhhrhrhrhrhrdjdhdhdhdjrjrjrjjfjrjrjfjfjfjfjfjjdjfjfjfjfjjfjdufurjrjrjjfjfjfjjrfjdjjzkskakakskjdjfjtjfjdjdjdjdjjdjdjdjdjdjdjfjtjgjfjfjfjfjfjfhfhfhfhfhdhdhdjdhdhfhfhfjfhfhfhfhfhfjrj
Ready to work
remotely

java

5+

Popular candidate! Connected by 5+ companies

  • United States, West Palm Beach
  • 1-3 years
  • $33k ($2.8k / month)
  • Pre intermediate
Core technical skills
Django
PHP
GraphQL
Blockchain
Design thinking
Achievements / Key results
dsdadfj
Considering roles
PM
DEVOPS
FULL STACK
FRONTEND
Ready to work
remotely
Experience details are hidden. To make them visible, send a message to the candidate.

Experience

  • e

    Feb 2009 - current time17 years 4 months

Software Engineer

15+

Popular candidate! Connected by 15+ companies

  • 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 3 months

QA

5+

Popular candidate! Connected by 5+ companies

  • 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 5 months

HR

15+

Popular candidate! Connected by 15+ 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

15+

Popular candidate! Connected by 15+ 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 4 months

Senior Backend Engineer

15+

Popular candidate! Connected by 15+ 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 time3 years

  • Backend Developer

    Nov 2018 - May 20234 years 7 months

Senior Full Stack Enginner | Web3 & Blockchain

35+

Popular candidate! Connected by 35+ 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

10+

Popular candidate! Connected by 10+ 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 time11 months

  • Penetration tester

    Jan 2022 - current time4 years 5 months

QA

25+

Popular candidate! Connected by 25+ 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 3 months

QA engineer 0024

10+

Popular candidate! Connected by 10+ 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 5 months

QA

10+

Popular candidate! Connected by 10+ 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-873 months

QA

20+

Popular candidate! Connected by 20+ 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 5 months

qa

20+

Popular candidate! Connected by 20+ 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 4 months

solana blockchain developer

20+

Popular candidate! Connected by 20+ 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 3 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

30+

Popular candidate! Connected by 30+ 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 3 months

Senior QA-Manager

20+

Popular candidate! Connected by 20+ 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

20+

Popular candidate! Connected by 20+ 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 5 months
View 221 more candidates