Cowchain

Cowchain blockchain development company is actively looking for Backend Developer to join our development team.

About us:
Cowchain have successfully completed 120+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.


Required skills:
— Around 2 year+ commercial experience in smart contract development on Solidity
— Hardhat/truffle/Foundry
— ERC721/ERC1155/ERC20/Chainlink
— JIRA, gitflow
— Node.js experience
— Web3/Etheres libraries
— LayerZero
— PDAs/CPI, SPL Token/Token-2022, Anchor testing, program accounts

Tech stack:
— Solana (Rust + Anchor)
— JavaScript
— Blockchain EVM-compatible chains DApp development
— Smart contracts development

What will you do:
— Smart contracts development for DeFi, NFT, GameFi solutions
— Integration of smart contract to ReactJs frontend
— Bugfixes and support existing solutions
— Participate in project architecture discussions
— Build solutions from scratch as well as join on-going development process
— Have fun;) 

What we offer:
— Flexible working schedule, remote work
— Competitive salary with bonuses for activities
— Ability to dive into fast-growing blockchain/crypto industry
— Work with modern tech stack (blockchain)
— Paid vacations, sick leaves
— 100% friendly/family team

Cowchain blockchain development company is actively looking for Backend Developer to join our development team.

About us:
Cowchain have successfully completed 150+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.
 
Required skills:
— At least 2-years commercial experience in the back-end development;
— Node.js Nest;
— MSSQL, MySQL, PostgreSQL;
— RabbitMQ, Redis Cache, BullMQ;
— JIRA, gitflow;
— EVM-based blockchains (Ethereum, Avalanche, Polygon, Binance Smart Chain, Velas, Hedera etc);
— Deep understanding of EVM and smart contracts (Solidity).
 
Tech stack:
— Node.js, Express, Nest.js, Microservices, Reddis, RabbitMQ;
— MYSQL, MSSQL, PostgreSQL;
— TheGraph (Subgraph), Moralis, Alchemy, Infura, Event indexing back-end;
— Azure, AWS, Google Cloud;
— Docker, Kubernetes.

What will you do:
— New features development;
— Bugfixes and support existing solutions;
— Participate in project architecture discussions;
— Build solutions from scratch as well as join on-going development process;
— Have fun)

Will be a huge plus:
— Web3/Ethers libraries;
— React development experience;
— Experience with DEX/CEX integration (Uniswap, PancakeSwap, Binance API);
— Solidity / Hardhat / Foundry.

What we offer:
— Flexible working schedule, remote work;
— Competitive salary with bonuses for activities;
— Ability to dive into fast-growing blockchain/crypto industry;
— Work with modern tech stack (blockchain);
— Paid vacations, sick leaves;
— 100% friendly/family team.


 

Cowchain blockchain development company is actively looking for Backend Developer to join our development team.

About us:
Cowchain have successfully completed 120+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.

Required skills:
— At least 3-year commercial experience in the Backend development
— Node.js experience is A MUST
— Ability to use Solscan to analyze data;
— Compiling, signing and sending transfer transactions;
— Compiling, signing and sending swap transactions;
— Transaction mult-signatures
— Pump.fun / Jupiter / Raydium;
— Bignumber.js / bn.js
— Understanding of gas, priority fee, token account creation
— Meme-coin creation Pump.fum/Meteora
— JIRA, gitflow

Tech stack:
— Node.js, Nest.js, Microservices
— MYSQL, MSSQL, PostgreSQL
— TheGraph (Subgraph), Event indexing back-end
— Azure, AWS, Google Cloud
— Docker, Kubernetes

Will be a plus:
— EVM-based blockchains (Ethereum, Avalanche, Polygon, Binance Smart Chain, Velas, Hedera etc)

What will you do:
— New features development;
— Bugfixes and support existing solutions;
— Participate in project architecture discussions;
— Build solutions from scratch as well as join on-going development process;
— Have fun)

What we offer:
— Flexible working schedule, remote work;
— Competitive salary with bonuses for activities;
— Ability to dive into fast-growing blockchain/crypto industry;
— Work with modern tech stack (blockchain);
— Paid vacations, sick leaves;
— 100% friendly/family team.

Cowchain blockchain development company is actively looking for Project Manager to join our development team.

About us:
Cowchain have successfully completed 120+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.

Required skills🦾

• Experience in Web3 is a must!
• More than a year of commercial experience in IT project management, preferably in outsourcing.
• Demonstrated success in software project execution.
• Mastery over Agile/non-Agile and a keen understanding of SDLC.
• Skills in project discovery, pre-sales, and detailed requirement documentation.
• Leadership and team management capabilities.
• A proactive approach to challenges.

• Fluent in English (Upper-Intermediate).

   

General tech stack our company

• React.js, Next.js, Javascript, Tailwind CSS, SCSS, SASS, Material UI knowledge
• Node.js, Nest.js
• MongoDB, MYSQL, MSSQL, PostgreSQL
• TheGraph (Subgraph), Event indexing backend
• EVM-based blockchains (Ethereum, Avalanche, Polygon, Binance Smart Chain, Arbitrum, Base etc.)
• Web3.js/Ether.js libraries
• Solidity, Rust
• Non-EVM-based blockchains (Solana, TON etc.)

We’ll match if you have

• Independent thinking and proactive position in development
• Strong problem-solving skills with a keen ability to think analytically and approach complex challenges.
• Attention to detail.
• Strong tech research skills.
• Excellent communication and collaboration skills, with the ability to work effectively in a team-oriented environment.

What we promise you

• Flexibility: The ability to choose when and where to work, ensuring a work-life balance.
• Rewards: Attractive pay and bonuses for additional achievements.
• Taking care of you: Paid vacation, sick days, and a 100% friendly work environment.

Cowchain blockchain development company is actively looking for Fullstack Developer to join our development team.

About us:
Cowchain have successfully completed 120+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.
 

Required skills:

— At least 1-year commercial experience in backend development
— Node.js & Nest.js — A MUST
— TypeScript
— PostgreSQL with Drizzle ORM
— Understanding of Onion Architecture
— Experience working with EVM networks and smart contracts
— Event indexing via The Graph / Subgraph
— REST & WebSocket APIs development
— GitFlow, Jira
— Experience with React, Next.js, Zustand
— SCSS, responsive UI
— axios for API calls
— Experience with blockchain data providers (Infura, Alchemy, QuickNode)

What will you do:
— New features development
— Bugfixes and support existing solutions
— Participate in project architecture discussions
— Build solutions from scratch as well as join on-going development process
— Have fun

What we offer:
— Flexible working schedule, remote work
— Competitive salary with bonuses for activities
— Ability to dive into fast-growing blockchain/crypto industry
— Work with modern tech stack (blockchain)
— Paid vacations, sick leaves
— 100% friendly/family team

Cowchain blockchain development company is actively looking for Solidity Developer to join our development team.

About us:
Cowchain have successfully completed 120+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.

Required skills:
— Around 2 year+ commercial experience in smart contract development on Solidity
— Hardhat/truffle/Foundry
— ERC721/ERC1155/ERC20/Chainlink
— JIRA, gitflow
— Node.js experience
— Web3/Etheres libraries
— LayerZero
— PDAs/CPI, SPL Token/Token-2022, Anchor testing, program accounts

Tech stack:
— Solana (Rust + Anchor)
— JavaScript
— Blockchain EVM-compatible chains DApp development
— Smart contracts development

What will you do:
— Smart contracts development for DeFi, NFT, GameFi solutions
— Integration of smart contract to ReactJs frontend
— Bugfixes and support existing solutions
— Participate in project architecture discussions
— Build solutions from scratch as well as join on-going development process
— Have fun;) 

What we offer:
— Flexible working schedule, remote work
— Competitive salary with bonuses for activities
— Ability to dive into fast-growing blockchain/crypto industry
— Work with modern tech stack (blockchain)
— Paid vacations, sick leaves
— 100% friendly/family team

Cowchain blockchain development company is actively looking for Backend Developer(Solana) to join our development team.

About us:
Cowchain have successfully completed 120+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.

Required skills:
— At least 3-year commercial experience in the Backend development
— Node.js experience is A MUST
— Ability to use Solscan to analyze data;
— Compiling, signing and sending transfer transactions;
— Compiling, signing and sending swap transactions;
— Transaction mult-signatures
— Pump.fun / Jupiter / Raydium;
— Bignumber.js / bn.js
— Understanding of gas, priority fee, token account creation
— Meme-coin creation Pump.fum/Meteora
— JIRA, gitflow


Tech stack:
— Node.js, Nest.js, Microservices
— MYSQL, MSSQL, PostgreSQL
— TheGraph (Subgraph), Event indexing back-end
— Azure, AWS, Google Cloud
— Docker, Kubernetes

Will be a plus:
— EVM-based blockchains (Ethereum, Avalanche, Polygon, Binance Smart Chain, Velas, Hedera etc)


What will you do:
— new features development
— bugfixes and support existing solutions
— participate in project architecture discussions
— build solutions from scratch as well as join on-going development process
— have fun

What we offer:
— flexible working schedule, remote work
— competitive salary with bonuses for activities
— ability to dive into fast-growing blockchain/crypto industry
— work with modern tech stack (blockchain)
— paid vacations, sick leaves
— 100% friendly/family team

Cowchain blockchain development company is actively looking for Fullstack Developer to join our development team.

About us:
Cowchain have successfully completed 120+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.
 

Required skills:

— At least 1-year commercial experience in backend development
— Node.js & Nest.js — A MUST
— TypeScript
— PostgreSQL with Drizzle ORM
— Understanding of Onion Architecture
— Experience working with EVM networks and smart contracts
— Event indexing via The Graph / Subgraph
— REST & WebSocket APIs development
— GitFlow, Jira
— Experience with React, Next.js, Zustand
— SCSS, responsive UI
— axios for API calls
— Experience with blockchain data providers (Infura, Alchemy, QuickNode)

What will you do:
— New features development
— Bugfixes and support existing solutions
— Participate in project architecture discussions
— Build solutions from scratch as well as join on-going development process
— Have fun

What we offer:
— Flexible working schedule, remote work
— Competitive salary with bonuses for activities
— Ability to dive into fast-growing blockchain/crypto industry
— Work with modern tech stack (blockchain)
— Paid vacations, sick leaves
— 100% friendly/family team

Cowchain blockchain development company is actively looking for DevOps to join our development team.

Requirements
— 5+ years of DevOps or Site Reliability Engineering experience.
— Strong expertise with AWS (EKS, RDS, S3, MSK) and container orchestration (Kubernetes,
Docker).
— Hands-on experience with Terraform, Helm, and Infrastructure-as-Code (IaC).
— Experience setting up CI/CD pipelines (GitLab CI, GitHub Actions, or Jenkins).
— Strong knowledge of observability tools (Prometheus, Grafana, ELK/EFK).
— Solid understanding of networking, security, and cloud cost optimization.
— Experience with physical server setup, datacenter operations, and building custom hardware
infrastructure (“be your own cloud”).
— Fluent English (written/spoken); Russian or Ukrainian for internal communication.

Nice to Have:
— Experience with blockchain infrastructure (validators, staking, nodes).
— Knowledge of secrets management (Vault, AWS KMS, HashiCorp).
— Familiarity with monitoring financial transactions for compliance and risk management.
Responsibilities
— Build, maintain, and optimize cloud infrastructure to support global fintech applications.
— Design and manage scalable CI/CD pipelines for rapid and reliable deployments.
— Implement monitoring, alerting, and incident response systems.
— Ensure system reliability, high availability, and disaster recovery readiness.
— Set up and manage physical hardware infrastructure when required, ensuring on-premise systems
integrate seamlessly with cloud environments.
— Collaborate closely with software engineers, security teams, and blockchain specialists.
— Automate infrastructure and workflows to reduce manual operations.

What we offer:
— Flexible working schedule, remote work
— Competitive salary with bonuses for activities
— Ability to dive into fast-growing blockchain/crypto industry
— Work with modern tech stack (blockchain)
— Paid vacations, sick leaves
— 100% friendly/family team

Cowchain blockchain development company is actively looking for Backend Developer to join our development team.

About us:
Cowchain have successfully completed 150+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.
 
Required skills:

— Experience in fintech projects is a must
— At least 2-years commercial experience in the back-end development;
— Node.js Nest;
— MSSQL, MySQL, PostgreSQL;
— RabbitMQ, Redis Cache, BullMQ;
— JIRA, gitflow;
— EVM-based blockchains (Ethereum, Avalanche, Polygon, Binance Smart Chain, Velas, Hedera etc);
— Deep understanding of EVM and smart contracts (Solidity).
— DDD / Clean / Onion architecture
— Optimizing database queries, transactions, indexes, sharding/partitioning, migrations
— Working with payments, invoices, transactions, balances, idempotency, security (KYC/AML, PCI DSS), integration with payment providers and banking APIs
— Experience with asynchronous systems and queues (BullMQ, RabbitMQ, Kafka), ability to design fault-tolerant services (circuit breaker, retry, outbox pattern)
— Practical experience with DevOps tools

What will you do:
— New features development;
— Bugfixes and support existing solutions;
— Participate in project architecture discussions;
— Build solutions from scratch as well as join on-going development process;
— Have fun)
 
Will be a huge plus:
— Web3/Ethers libraries;
— React development experience;
— Experience with DEX/CEX integration (Uniswap, PancakeSwap, Binance API);
— Solidity / Hardhat / Foundry.

What we offer:
— Flexible working schedule, remote work;
— Competitive salary with bonuses for activities;
— Ability to dive into fast-growing blockchain/crypto industry;
— Work with modern tech stack (blockchain);
— Paid vacations, sick leaves;
— 100% friendly/family team.
 

Cowchain blockchain development company is actively looking for Backend Developer to join our development team.

About us:
Cowchain have successfully completed 150+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.
 
Required skills:
— Experience in fintech projects is a must
— At least 2-years commercial experience in the back-end development;
— Node.js - Nest;
— Experience and understanding  EVM-based blockchains;
— DDD / Clean / Onion architecture

— MSSQL, MySQL, PostgreSQL;
— Optimizing database queries, transactions, indexes, sharding/partitioning, migrations
— Working with payments, invoices, transactions, balances, idempotency, security (KYC/AML, PCI DSS), integration with payment providers and banking APIs
— Experience with asynchronous systems and queues (BullMQ, RabbitMQ, Kafka), ability to design fault-tolerant services (circuit breaker, retry, outbox pattern)
— Practical experience with DevOps tools

What will you do:
— New features development;
— Bugfixes and support existing solutions;
— Participate in project architecture discussions;
— Build solutions from scratch as well as join on-going development process;
— Have fun)
 
Will be a huge plus:
— Web3/Ethers libraries;
— Experience with DEX/CEX integration (Uniswap, PancakeSwap, Binance API);
— Solidity / Hardhat / Foundry.

What we offer:
— Flexible working schedule, remote work;
— Competitive salary with bonuses for activities;
— Ability to dive into fast-growing blockchain/crypto industry;
— Work with modern tech stack (blockchain);
— Paid vacations, sick leaves;
— 100% friendly/family team.

Cowchain blockchain development company is actively looking for Fullstack Developer to join our development team.

About us:
Cowchain have successfully completed 120+ projects mainly on EVM-based blockchains such as Ethereum, Polygon, Arbitrum, Base including Coinmarketcap leaders with 180M+ total capitalization and 20M+ daily trading volume in Move2Earn, Play2Earn and DeFi industries.
 

Required skills:

— At least 1-year commercial experience in backend development
— Node.js & Nest.js — A MUST
— TypeScript
— PostgreSQL with Drizzle ORM
— Understanding of Onion Architecture
— Experience working with EVM networks and smart contracts
— Event indexing via The Graph / Subgraph
— REST & WebSocket APIs development
— GitFlow, Jira
— Experience with React, Next.js, Zustand
— SCSS, responsive UI
— axios for API calls
— Experience with blockchain data providers (Infura, Alchemy, QuickNode)

What will you do:
— New features development
— Bugfixes and support existing solutions
— Participate in project architecture discussions
— Build solutions from scratch as well as join on-going development process
— Have fun

What we offer:
— Flexible working schedule, remote work
— Competitive salary with bonuses for activities
— Ability to dive into fast-growing blockchain/crypto industry
— Work with modern tech stack (blockchain)
— Paid vacations, sick leaves
— 100% friendly/family team