Senior QA Engineer (Typescript, Blockchain) - OP02306-00

As a Senior QA Engineer at Dev.Pro, you'll own end-to-end quality assurance for a large-scale blockchain-based platform serving private markets. You'll combine hands-on manual testing with building and expanding test automation across backend services, distributed systems, and blockchain integrations, helping establish testing approaches and automation practices from the ground up while working closely with engineering teams and business stakeholders.

What you'll do

• Review business requirements and technical documentation to understand system functionality and identify testing needs
• Manually test new features and existing functionality to understand system behavior and guide test automation efforts
• Define and improve QA strategies, test plans, and quality gates
• Establish testing ownership and coordinate responsibilities between QA and engineering teams
• Work closely with engineering and product teams to define test coverage and acceptance criteria
• Build and maintain automated test suites, frameworks, and test harnesses, focusing on backend, integration, and contract testing
• Test blockchain integrations, smart contracts, REST APIs, JSON-RPC endpoints, MCP servers, and other blockchain-specific functionality
• Integrate and monitor automated tests within CI/CD pipelines and quality gates
• Investigate and troubleshoot issues across distributed systems and blockchain integrations
• Adjust testing priorities and approaches as project needs evolve
• Maintain test documentation, report quality risks, and communicate testing progress and blockers
• Help expand automation coverage and improve QA practices across multiple projects

What you bring

• 5+ years in QA/SDET roles, covering both manual and automated testing across the full SDLC
• Strong experience with backend and non-UI test automation
• Hands-on experience developing, maintaining, and debugging automated tests
• Strong programming skills for test automation, preferably with TypeScript or Node.js
• Ability to define QA strategies, test plans, and quality gates from the ground up
• Understanding of blockchain fundamentals, including wallets, transactions, and blockchain types
• Experience testing REST APIs and RPC-based interfaces such as JSON-RPC and gRPC
• Experience with Docker-based test environments and debugging containerized services
• Experience integrating automated tests into CI/CD pipelines and establishing quality gates
• Experience with AWS-based infrastructure
• Experience with MongoDB or PostgreSQL
• Strong analytical and problem-solving skills to identify risks and propose solutions
• Ability to independently manage testing activities, take ownership of deliverables, and proactively communicate progress and blockers
• Ability to adapt to changing priorities and demonstrate a flexible, hands-on approach to testing
• Ability to define testing scope and balance test coverage between QA and engineering teams
• Strong communication and collaboration skills across multiple stakeholders and teams
• Upper-Intermediate or higher English level

Nice to have

• Hands-on experience testing blockchain systems, smart contracts, and transaction flows
• Experience with Go for test automation
• EVM testing experience using Foundry, Hardhat, or similar frameworks
• Ability to read and understand Solidity or Rust code for smart contract validation
• Experience with Layer 2 solutions and blockchain protocol testing
• Experience testing asynchronous messaging systems such as AWS SNS/SQS or Azure Service Bus
• Experience with Kubernetes
• Experience with observability-driven testing
• Experience testing MCP servers
• Experience with performance and load testing

About Dev.Pro

Dev.Pro is a US-based outsourced software development company operating as a remote-first organization. The company works across 55+ countries on five continents, helping tech companies scale their business through software engineering expertise.