Senior Software Development Engineer in Test; SDET

We are building Startale App, a next-generation Web3 application that brings together a wide range of blockchain and DeFi functionality into a single user experience. The platform interacts with multiple blockchain networks, smart contracts, wallets, tokens, and on-chain protocols, creating complex flows that span frontend applications, backend services, blockchain infrastructure, and decentralized systems.

As a Senior Software Development Engineer in Test (SDET), you will own the engineering foundations of quality across the platform. Rather than simply writing automated tests, you will design and build the testing architecture, automation frameworks, developer tooling, CI/CD integrations, and AI-powered quality systems that enable the entire engineering organization to ship quickly and confidently.

You will work across frontend applications, backend services, blockchain integrations, smart contracts, and DeFi functionality to ensure correctness, reliability, and security across complex real-world Web3 flows.

This is a highly technical software engineering role focused on building quality systems, not performing manual testing. We are looking for engineers who enjoy building platforms, tooling, and automation that other engineers rely on every day.

• Design, build, and evolve the company’s quality engineering platform.
• Define testing architecture across unit, integration, contract, API, and end-to-end testing.
• Build and maintain reusable testing frameworks, shared libraries, fixtures, and developer tooling.
• Continuously improve developer experience around testing and quality engineering.

• Design and implement AI-assisted quality engineering workflows throughout the software development lifecycle.
• Build systems that leverage LLMs for automated test generation, test maintenance, failure analysis, root cause identification, and regression detection.
• Develop internal tooling that combines traditional automation with AI to improve engineering productivity and software quality.
• Continuously evaluate emerging AI technologies and integrate them into the team’s quality engineering practices.

• Build comprehensive automated test suites covering APIs, backend services, frontend applications, blockchain interactions, and Web3 user flows.
• Integrate automated testing into CI/CD pipelines with fast feedback cycles and automated quality gates.
• Optimize test execution through parallelization, intelligent test selection, caching, and infrastructure improvements.
• Drive automation-first engineering practices across development teams.

• Validate complex Web3 user flows involving wallets, authentication, token operations, smart contracts, and on-chain transactions.
• Test interactions between frontend applications, backend services, blockchain networks, RPC providers, indexers, and smart contracts.
• Validate transaction lifecycle and state transitions, including transaction submission, confirmation, failure, retries, reorgs, and delayed or inconsistent blockchain state.
• Design automated regression suites covering critical Web3 and DeFi functionality.
• Validate token transfers, swaps, liquidity operations, staking, lending, and other DeFi flows as applicable to the platform.
• Test edge cases involving gas estimation, transaction failures, insufficient balances, slippage, network conditions, and blockchain state changes.

• Build and maintain containerized testing environments using Docker and modern infrastructure tooling.
• Design contract, integration, and end-to-end testing strategies for distributed and blockchain-based systems.
• Develop automated load, stress, endurance, and resilience testing for backend services and Web3 infrastructure.
• Validate system behavior during degraded conditions, network failures, RPC failures, timeouts, blockchain congestion, transaction failures, and infrastructure outages.
• Collaborate with engineering teams to improve system observability and accelerate production issue investigation.

• 5+ years of experience in Software Development Engineer in Test (SDET), Quality Engineering, Test Automation, or Software Engineering roles.
• Strong software engineering skills with JavaScript or Type Script.
• Experience designing testing architecture for complex distributed systems.
• Experience building scalable automation frameworks and reusable testing…