Software Test Engineer

SmartHelio is a Y Combinator company (YC W22). We are a customer-focused and research-driven deep-tech startup headquartered in Lausanne, Switzerland. We are disrupting conventional energy operations and asset management by bringing AI-driven asset management workflow automation. We enable solar/clean energy companies with automated system performance analysis and decision-intelligence capabilities for smoother asset management and higher profitability. Learn more at are looking for a Software Test Engineer who has executed testing in live/production environments and thrives on preventing issues before customers see them. You'll craft test strategies, automate where it matters, validate complex data workflows, and partner with engineers to ship confidently.Qualification- 2+ years of proven testing experience in production or production-like environments for web/SaaS platforms.- Strong fundamentals of software testing: test design techniques, boundary/edge cases, and risk-based testing.- Hands-on with API testing (Postman or PyTest/Requests) and UI/e2e tools (Selenium).- Comfortable writing testing utilities/scripts in Java/JavaScript/TypeScript or Python.- SQL and MongoDB proficiency for data validation; familiarity with logs/metrics/traces (e.g., CloudWatch/Grafana/ELK).- Excellent command and proven experience with CI/CD (GitHub Actions/Jenkins), Git workflows, and defect/test management tools (Jira/TestRail or equivalents).- Strong aptitude to test and validate Algorithms and their logic control.- Excellent documentation and communication skills; bias for clarity and prevention.Nice to have- Performance testing (k6/JMeter), contract testing (Pact), and basic security testing (OWASP Top 10 awareness).- Exposure to microservices, message queues, and event-driven architectures.- Knowledge/exposure of AI testing and benchmarking techniques and willingness to learn test AI modules and LLM-based agents.- Domain knowledge in energy/IoT, hardware-in-loop testing, or time-series data validation.What will we do together?- Own test planning and execution across web UI, APIs, and data pipelines; define clear entry/exit criteria and risk-based prioritization.- Author and maintain manual and automated test cases (regression, smoke, sanity, compatibility).- Build reliable automation for API/UI/e2e flows (e.g., Postman/Newman, PyTest/Requests, Selenium).- Test data-intensive features: algorithm (ML-based and physics-based), validate ETL/ELT jobs, time-series accuracy, idempotency, and data quality (DQ) checks.- Perform production-aware testing: canary/blue-green validation, feature-flag rollouts, log-based verification, and SLO-driven checks.- Conduct non-functional testing (performance with k6/JMeter; reliability; basic security checks) and coordinate with DevOps on environment parity.- Create/maintain test documentation: test plans, traceability matrices, runbooks, RCA reports, and release sign-offs.- Drive defect lifecycle end-to-end: triage, prioritization, clear reproduction steps, and verification of fixes.- Track and report quality metrics (coverage, MTTR for bugs, escaped defects) to improve release discipline.Job LocationNoida/New Delhi, India.Compensation & Benefits- Remuneration: A competitive remuneration with additional ESOPs.- Opportunity to implement and master AI/LLM/algorithms-based data-intensive advanced analytics/AI platforms.- Opportunity to learn and master big-data technologies.- Opportunity to work in a conducive environment that challenges your limits and helps you in improving your capacities- Opportunity to work with Swiss Research Institutions and closely collaborate with top global tech researchers- Ample opportunities to learn and grow professionally. We conduct monthly professional & personal productivity workshops- Conceptualize, write and live your own startup story with full autonomy and under brilliant mentorship- The high degree of empathy and work-life balance.How to ApplyPlease fill the forms ( &