Boosty Labs

Our client is one of the EU-based DeFi companies, that provides secure and efficient trading solutions for individual traders and companies that operate in the financial field. Their core product is a Protocol being used by developers worldwide.

Project stack: Ethereum, Node.js, Ether.js, AWS, Terraform

Team on the project: 1 BE from our side and the rest of the team from the client side.

Requirements:

• 5+ years of experience in software development

• Strong Computer Science background

• Strong software engineering experience using NodeJS/TypeScript

• Extensive experience with web3.js/ethers.js.

• Passionate and committed to learning new things and developing with the latest technologies and frameworks

• Strong analytical, communication, and organizational skills and the ability to handle multiple tasks

• Work well in both a small agile team and independently

• Upper-Intermediate English

Nice to have:

• Experience writing Smart Contracts and understanding the EVM

Responsibilities:

• Build and improve the core system, including web3 components and smart contracts

• Become an expert in major DeFi protocols as well as Layer 2 scaling solutions

• Ensure users have a highly secure and scalable system

• Be a leader that has a direct impact on the product roadmap

• Make a significant impact using open-source code

What we offer:

• Remote working format 

• Flexible working hours

• Informal and friendly atmosphere

• The ability to focus on your work: a lack of bureaucracy and micromanagement

• 20 paid vacation days

• 7 paid sick leaves

• Education reimbursement

• Free English classes

• Psychologist consultations

Recruitment process: Recruitment interview - Technical interview - Client interviews

Boosty Labs is one of the most prominent outsourcing companies in the blockchain domain. Among our clients are such well-known companies as Ledger, Consensys, Storj, Animoca brands, Walletconnect, Coinspaid, Paraswap, and others

Responsibilities
 

• Develop and maintain the core logic of the arbitrage trading bot using Go.
• Implement and optimize high-performance, low-latency trading algorithms
• Integrate with multiple exchange APIs (Binance, Bybit, Coinbase, etc.) for real-time market data retrieval and trade execution
• Write efficient and scalable code to ensure optimal trading execution.
• Work closely with the quant team to refine trading strategies and backtest performance
• Develop monitoring tools and logging mechanisms to track bot performance and detect anomalies
• Optimize code for fault tolerance, concurrency, and efficiency.
• Debug and fix issues related to network communication, data processing, and API integrations
   

Requirements
 

• 1-3 years of experience in Go (Golang) development
• Understanding of concurrency patterns, goroutines, and channel-based communication
• Experience working with REST & WebSocket APIs, including authentication mechanisms
• Basic knowledge of trading, financial markets, or arbitrage strategies.
• Familiarity with message queues (Kafka, RabbitMQ, or similar)
• Experience with PostgreSQL, Redis, or other databases for handling market data
• Understanding of data structures and algorithms for fast data processing
• Strong problem-solving skills and attention to detail
   

Nice to Have
 

• Experience with high-frequency trading (HFT) or financial markets
• Previous work on arbitrage bots, market-making bots, or trading platforms
• Knowledge of blockchain, DeFi protocols, or smart contract interactions
• Familiarity with Python or Rust for additional scripting tasks

Experience with Kubernetes and Docker for deployment

What we offer:

• Remote format 
• Flexible working hours
• Informal and friendly atmosphere
• The ability to focus on your work: a lack of bureaucracy and micromanagement
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations
   

Recruitment process:

Recruitment interview – Technical interview

We are actively seeking backend engineer to help build fintech API integrations and ensure seamless transactions. Our client  is a  UI pass-through system enabling real-time USDC payments across the USA and Africa

Project stack: Java, Kafka, Kubernetes, Microservices architecture

Requirements:
 

• 5+ years experience with Java 
• Strong experience in backend API development
• Experience with fintech APIs and 3rd-party integrations (REST/Webhooks)
• Proficiency in authentication mechanisms (OAuth, JWT)
• Solid understanding of error handling and robust API architecture
• Experience with Kafka, Kubernetes, and microservices
• Prior experience in payments infrastructure
   

Responsibilities:
 

• Build and maintain backend API integrations
• Develop and optimize fintech API interactions, including payment processing and real-time transaction handling
• Implement authentication mechanisms and ensure secure data exchange
• Collaborate with the product team to improve infrastructure and optimize performance

What we offer: 
 

• Remote working format 
• Flexible working hours
• Informal and friendly atmosphere
• The ability to focus on your work: a lack of bureaucracy and micromanagement
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations

Recruitment process: Recruitment Interview - Technical Interview - Interview with Product Manager -  Interview with Founder/CEO

Our client’s project is an S3-compatible enterprise layer on top of the Filecoin ecosystem. L2 Filecoin network for enterprise-grade decentralized storage.

As a Manual QA Engineer, you will be essential to our quality assurance team, working closely with developers and senior QA engineers to verify and validate our blockchain applications. You will design, execute, and document test cases and scenarios to ensure that our applications meet rigorous standards of functionality, security, and performance. This role will allow you to develop your skills in a cutting-edge field and grow as a QA professional in the blockchain space.

Project stack: Typescript, Node.js, Nest.js, React, React Native, GCP, Postgres, Redis, Bull, Jest

Team on the project: PM, BA, Senior Fullstack, Senior DevOps, QA

Requirements:
 

• 1-3 years of experience in software quality assurance, specifically in manual testing
• Strong understanding of blockchain technology, including smart contracts, consensus algorithms, and decentralized applications
• Strong understanding of software development lifecycle and QA processes
• Proficiency in creating and managing test cases, test plans, and bug reports using tools like JIRA, TestRail, or similar
• Strong communication and collaboration skills, with the ability to work effectively in a team-oriented environment
• Upper-Intermediate English

Nice-to-have:
 

• Experience with blockchain testing
• Bash scripting
• Basic knowledge of automation testing
• Experience with cloud platforms such as AWS
• Experience working in Agile/Scrum methodologies

Responsibilities:
 

• Design, create, and execute comprehensive test plans and test cases for blockchain applications
• Collaborate with developers, product managers, and other QA team members to ensure thorough testing coverage
• Manually test blockchain applications, identifying and reporting defects and issues
• Perform regression testing to verify that new changes haven’t impacted existing functionalities
• Maintain and update test documentation, including test plans, test cases, and test data
• Participate in code reviews to ensure code quality and adherence to best practices
• Stay updated on the latest blockchain technologies and testing methodologies
• Contribute to improving the overall quality and efficiency of the testing process
• Troubleshoot and debug issues encountered during manual testing

What we offer:

• Flexible working format (remote, office, or mix)
• Flexible working hours
• Informal and friendly atmosphere
• The ability to focus on your work: a lack of bureaucracy and micromanagement
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations
 

Recruitment process: Recruitment Interview — Technical Interview — Final Interview

Our client is a crypto platform that enables institutions to participate in digital assets through custody, staking, trading, governance, settlement, and the industry’s leading security infrastructure.
 

Project stack:

• Golang, Docker, Kubernetes, GCP
   

Requirements:

• Proficient in Golang
• Experience with  gRPC, Docker, Kubernetes, and GCP
• Strong understanding of wallet functionalities, including: how signing works and parameters needed to ensure validity on-chain (e.g., replay protection, fees, interactions with accounts/programs/coins)
• Node-based scanning processes for retrieving account info, balances, transactions, block events, and mapping these to balance changes
• Ability to navigate and understand open-source code, especially for protocol-level integrations.

• Skilled in writing efficient, isolated tests and familiar with CI/CD tools to ensure test pass rates

   

Responsibilities:

• Write clean, well-documented, and readable code
• Address feedback on pull requests efficiently
• Develop isolated tests and ensure code passes through CI/CD pipelines.
• Debug issues effectively to identify root causes across various environments.
• Ensure live systems and testing stages function as expected without regressions
• Work on wallet-related functionalities
• Implementing secure signing mechanisms
• Ensuring validity on-chain with replay protection and proper fee handling
• Direct scanning from nodes for account and transaction data

• Adapt integration strategies based on insights from open-source protocol code

  
  What we offer:

  • Remote working format
  • Flexible working hours
  • Informal and friendly atmosphere
  • The ability to focus on your work: a lack of bureaucracy and micromanagement
  • 20 paid vacation days
  • 7 paid sick leaves
  • Education reimbursement
  • Free English classes
  • Psychologist consultations

   

  Recruitment process:

  Recruitment Interview — Technical Screen — Client Screen — Coding Session — System Design Sessio

Our customer is the first hyper-performant and horizontally scalable blockchain network designed to enable trustless computing at internet scale.

They are comprised of a team spanning backgrounds from Harvard, CMU, DFINITY, VMWare, Galaxy Digital, and more, and is backed by top-tier institutions like Founders Fund, Kraken Ventures, SALT, Amber Group, and more

Requirements:
 

• 5+ years of experience in designing, testing, and implementing scalable backend systems
• Experience with a low level programming language like Rust, C, C++, Zig
• Experience in systems programming. Strong signals include experience writing compilers, operating systems, kernels, machine simulators
• Experience writing correct, reliable software. Must have worked on and deployed software changes to software used by people
• Bachelor's degree in Computer Science or related technical field or equivalent practical experience
• Creative, independent, and collaborative team player with the ability to work in a fast paced environment

Nice to have: 
 

• Active participation in Bitcoin/Ethereum/Blockchain projects or the open-source community is highly desirable

Responsibilities:
 

• Design core, backend software components, and code primarily using Rust
• Use extensive experience to build, test, debug, and deploy production-grade components
• ​​Develop and maintain high-quality software engineering practices and principles in a highly visible open-source project

What we offer: 
 

• Remote format (remote, office, or mix)
• Flexible working hours
• Informal and friendly atmosphere
• The ability to focus on your work: a lack of bureaucracy and micromanagement
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations

Recruitment process: Recruitment interview - Technical interview -  Client  interviews

We are seeking a highly motivated and skilled Business Analyst with experience in Blockchain to join our team. Our ideal candidate would be willing to share his experience, enhance our process, and bring new ideas.

Team: 3 Business Analysts

Requirements:
 

• 5+ years of experience in the software development industry (outsourcing companies) in the position of Business Analyst, Product Analyst
• Understanding of Blockchain principals, DeFi & NFT, cross-chain communications, Ethereum, Polkadot & substrate-based chains, L2 infrastructure, ZK rollups, and ZK in general
• Understanding of Bitcoin & Bitcoin L2s  (nice to have)
• Good time management skills to feel confident with multi-task activities;
• Good communication skills (working with customers and the development team)
• Upper-intermediate or above English level

Responsibilities:
 

• Leading a BA team
• Participation in Pre-sale (workshop with clients, estimation, offer preparation)
• Participation in the Discovery phase
• Requirements Management (from elicitation to production)
• Preparation of documentation (business rules, as is/to flow, drawing up requirements, data configuration, use cases, user stories, functional specs)
• Business Process Optimization
• Investigation, market analysis
• Cooperation with the PR team (drawing research articles and their publication)

What we offer:
 

• Remote working format (remote, office, or mix)
• Flexible working hours
• Informal and friendly atmosphere
• The ability to focus on your work: a lack of bureaucracy and micromanagement
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations

Recruitment process: Recruitment interview - Technical interview - Final interview

We are looking for a Junior TypeScript Developer to join our team and contribute to the development of a secure SDK that integrates Ledger hardware wallets as hardware security modules (HSMs) within the Hyperledger Fabric framework. This project enhances security, transaction signing, and identity management by extending Hyperledger Fabric components, including its SDK, chaincode, and Certificate Authority (CA).

As part of our team, you will focus on TypeScript-based SDK development, enabling seamless interaction between blockchain applications and Ledger wallets while collaborating with experienced engineers in a dynamic blockchain environment.
 

Team Composition

You will be working alongside a Project Manager, Business Analyst, Senior SDK Developer (TypeScript), two Senior Hyperledger Fabric Developers (Go), a QA Engineer, and a DevOps Engineer.
 

Requirements

• 2+ years of experience in backend development using TypeScript
• Deep understanding of API development
• Familiarity with Git, Agile/Scrum development workflows, and code review processes
• Experience working on blockchain projects
• Upper-intermediate (B2) or higher level of English
   

Responsibilities

• Develop and maintain scalable, high-performance backend systems using TypeScript
• Design and implement RESTful APIs, ensuring security and efficiency
• Optimize system performance, ensuring high availability and fault tolerance
• Collaborate with other developers, DevOps engineers, and project team members to ensure seamless system integration
• Write unit, integration, and end-to-end tests to maintain code quality
• Participate in code reviews and technical discussions
   

We Offer:

• Remote work
• Flexible schedule
• Informal and friendly atmosphere—collaborate with a supportive team.
• No bureaucracy or micromanagement—focus on delivering results.
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations
   

Recruitment Process:

Recruitment interview — Technical interview

Our customer is a blockchain technology leader, focused on building solutions for a decentralized financial ecosystem. By leveraging Bitcoin’s infrastructure, it develops advanced second-layer protocols, as well as user-friendly software and hardware solutions

Project stack:  Rust, C++, AWS
 

Requirements:

• 5+ years of experience in software engineering
• 3+ years of experience in Bitcoin development, including work with Bitcoin Core, Lightning Network, or Bitcoin-related infrastructure.
• Strong experience in C++ or Rust
• Test-driven development (unit tests, end to end, etc)
• Designing, implementing, and using APIs (RESTful, Websocket, RPC, etc.)
• Development and operation of back-end infrastructure and sysadmin tools
• Design of scalable, distributed back-end architectures
• Cloud development and deployment (AWS or GCE)
• Experience with system/software architecture
• Excellent communication, team player attitude, and collaboration skills
• Highly self-motivated, lifetime learner
• Open-source software development experience

Nice-to-have:

•  Experience contributing to Bitcoin Core, BIPs, or open-source blockchain projects

Responsibilities:

• Working with different programming languages and varied tech stacks
• Building and maintaining robust solutions using your high-level expertise and solid understanding of low-level systems to seamlessly integrate our technology with end users as well as existing third-party systems
• You will design, implement, test, deliver, and support software in a continuous integration and deployment environment
   

What we offer:

• Remote working format
• Flexible working hours
• Informal and friendly atmosphere
• The ability to focus on your work: a lack of bureaucracy and micromanagement
• 20 paid vacation days
• 7 paid sick leaves
• Education reimbursement
• Free English classes
• Psychologist consultations
   

Recruitment process:

• Recruitment interview – Technical interview – Customer intro – Customer Technical interview