Senior QA Engineer: Blockchain & Backend Automation (TS)

Dev PRO; Madrid; Remote; EUR 60,000 - 90,000; Full time

Job summary

Dev.Pro is hiring a Senior QA Engineer to oversee end-to-end quality for a large-scale blockchain platform. The role combines hands-on manual testing with building and expanding test automation across backend services, distributed systems, and blockchain integrations.

You will define QA strategies, write test plans, and establish quality gates, partnering with engineering and product teams to ensure reliable releases and scalable testing frameworks. Remote-first, international teams welcome.

Qualifications

• 5+ years in QA/SDET roles, covering 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/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 (JSON-RPC, 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.

Responsibilities

• 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.

Skills

QA/SDET

Backend testing

Automation testing

TypeScript/Node.js

REST APIs

Blockchain

CI/CD

Docker

AWS

MongoDB/PostgreSQL

Tools

Docker

AWS

Kubernetes

Go

Job description

Dev.Pro is hiring a Senior QA Engineer to oversee end-to-end quality for a large-scale blockchain platform. The role combines hands-on manual testing with building and expanding test automation across backend services, distributed systems, and blockchain integrations.

You will define QA strategies, write test plans, and establish quality gates, partnering with engineering and product teams to ensure reliable releases and scalable testing frameworks. Remote-first, international teams welcome.