Senior Software Engineer, Quality Engineering (SDET)

Startale Group; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

Startale Group, in partnership with SBI Group, is building a next-generation decentralized exchange (DEX) focused on Japanese equities. We seek a Senior SDET to design and implement AI-enhanced quality engineering across the SDLC, from testing frameworks to CI/CD and blockchain validation.

You will collaborate with Backend, Frontend, Blockchain, and DevOps teams to drive testability, reliability, and performance for high-throughput trading systems.

Qualifications

• 5+ years in SDET, Quality Engineering, Test Automation, or Software Engineering roles.
• Experience building scalable automation frameworks and reusable testing libraries from scratch.
• Strong software engineering skills with JavaScript or TypeScript.
• Strong experience with modern end-to-end testing frameworks such as Playwright or Cypress.
• Strong experience testing APIs (REST, JSON-RPC, GraphQL, WebSocket, or similar).
• Experience integrating automated testing into CI/CD pipelines.
• Experience with Docker and containerized testing environments.
• Strong communication skills and the ability to collaborate effectively across engineering disciplines.

Responsibilities

• 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.
• Design reliable test data generation and management strategies that enable deterministic and repeatable testing.
• 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, maintenance, and regression detection.
• Develop internal tooling to improve engineering productivity with AI.
• Continuously evaluate emerging AI technologies and integrate them into the team.

Skills

SDET experience

Automation frameworks

JavaScript/TypeScript

APIs testing

CI/CD

Communication

Production-quality software

Test automation

Tools

Playwright

Cypress

Docker

Kubernetes

Job description

About the role

In partnership with SBI Group, we are building a next-generation decentralized exchange (DEX) aimed at bringing the majority of Japanese equities on-chain. Our goal is to create a secure, transparent, and high-performance trading infrastructure capable of supporting institutional volumes while remaining accessible to retail participants. The platform features a fully on-chain order book powered by a custom state transition function and consensus layer, purpose-built for low-latency, high-throughput trading.

About the role

In partnership with SBI Group, we are building a next-generation decentralized exchange (DEX) aimed at bringing the majority of Japanese equities on-chain. Our goal is to create a secure, transparent, and high-performance trading infrastructure capable of supporting institutional volumes while remaining accessible to retail participants. The platform features a fully on-chain order book powered by a custom state transition function and consensus layer, purpose-built for low-latency, high-throughput trading.

Key responsibilities

Quality Engineering Platform

• 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.


• Design reliable test data generation and management strategies that enable deterministic and repeatable testing.


• Continuously improve developer experience around testing and quality engineering.

AI-powered 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.

Test Automation & CI/CD

• Build comprehensive automated test suites covering APIs, backend services, frontend applications, and blockchain interactions.


• 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.

Trading System Validation

• Validate the correctness of trading flows, order matching, execution paths, routing logic, fee calculations, and settlement.


• Verify consistency between backend services, blockchain state, and frontend behavior.


• Design robust regression suites protecting the platform's critical trading functionality.


• Ensure correctness under real-world market conditions and edge cases.

Infrastructure, Performance & Reliability

• Build and maintain containerized testing environments using Docker and modern infrastructure tooling.


• Design contract, integration, and end-to-end testing strategies for distributed systems.


• Develop automated load, stress, endurance, and resilience testing for high-throughput trading services.


• Validate system behavior during degraded conditions, network failures, timeouts, and infrastructure outages.


• Collaborate with engineering teams to improve system observability and accelerate production issue investigation.

Engineering Collaboration

• Work closely with Backend, Frontend, Blockchain, DevOps, and Product teams to improve overall system quality.


• Participate in architecture discussions to ensure systems are designed for testability and reliability.


• Drive quality engineering best practices across the organization.


• Mentor engineers on automated testing, testing architecture, and quality engineering principles.

Qualifications

Required Experience

• Ability to write clean, maintainable, production-quality software, not just automated tests.


• Experience building scalable automation frameworks and reusable testing libraries from scratch.


• 5+ years in SDET, Quality Engineering, Test Automation, or Software Engineering roles.


• Strong software engineering skills with JavaScript or TypeScript.


• Strong experience with modern end-to-end testing frameworks such as Playwright or Cypress.


• Strong experience testing APIs (REST, JSON-RPC, GraphQL, WebSocket, or similar).


• Experience integrating automated testing into CI/CD pipelines.


• Experience with Docker and containerized testing environments.


• Strong communication skills and the ability to collaborate effectively across engineering disciplines.

Nice-to-Have

• Experience building internal developer-productivity or quality-engineering platforms.


• Experience designing testing architecture for complex distributed systems (API, integration, contract, and E2E strategy).


• Experience designing and implementing performance, load, and reliability testing (k6, Artillery, Gatling, or Locust).


• Strong understanding of observability and production debugging (OpenTelemetry, Prometheus, Grafana, or Datadog).


• Experience debugging distributed systems across frontend, backend, APIs, databases, and infrastructure.


• Experience designing and managing reliable test data and testing environments.


• Experience testing complex transactional, financial, or high-throughput systems.


• Experience designing AI-assisted testing systems or integrating LLMs into QA workflows (test generation, failure analysis, regression detection, test maintenance).


• Experience testing DEXs, trading platforms, exchanges, or other financial systems.


• Familiarity with blockchain fundamentals, smart contracts, and on-chain flows; order books, AMMs, liquidity pools, routing, and execution.


• Experience with Kubernetes and cloud-native infrastructure.