{"id":1714389,"url":"https://alion.io/job/sleep-performance-test-engineer","title":"Performance Test Engineer","company":{"id":22525,"name":"Sleep","domain":"sleep.ai","url":"https://alion.io/company/sleep","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"ADP","truth_index":null},"role":"QA","role_family":"QA","seniority":"senior","employment_type":"contractor","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Dublin, Ireland"],"countries":["IE"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":35,"max":50,"currency":"EUR","period":"hour","gross":null,"usd_annual":112000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Azure","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Dynatrace","optional":false},{"name":"Gatling","optional":false},{"name":"JavaScript","optional":false},{"name":"JMeter","optional":false},{"name":"k6","optional":false},{"name":"Python","optional":false},{"name":"Azure Cosmos DB","optional":true},{"name":"Azure DevOps","optional":true},{"name":"GitHub Actions","optional":true}],"status":"live","first_seen_at":"2026-10-01T20:10:00Z","employer_posted_date":"2026-10-01","last_verified_at":"2026-10-04T00:14:32Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Performance Test Engineer (Azure)\nShort-term, Part-time contract\n10 - 15 hours per week\nAbout us\nSleep.ai is an AI-powered sleep platform on a mission to change the world through the power of sleep. We help companies build sleep insights, coaching and research-backed solutions into their products and services, and we power consumer products such as the SleepScore app. We have offices in San Diego, Dublin and Berlin.\nWe are seeing growing traction and interest, and the number of users joining our platform is climbing quickly. Our platform runs on Azure, using Function Apps, Storage Queues, Blob Storage and Table Storage. We need to understand where it will struggle as load grows, and what needs to change so it can scale.\nLearn more: www.sleep.ai\nThe role\nWe are looking for an experienced Performance Test Engineer to assess the scalability, stability and responsiveness of our platform under varying load. You will identify bottlenecks, carry out root cause analysis and give us a clear, prioritised plan to resolve them.\nYou will lead the performance testing effort, working in close collaboration with our backend and DevOps teams to agree priorities, shape the approach and review findings. You will recommend appropriate tooling, with selections reviewed and approved by the engineering team to ensure they fit our platform and existing practices.\nKey responsibilities\nDefine a performance testing strategy and test plans in collaboration with the backend and DevOps teams, covering load, stress, spike, soak/endurance and scalability scenarios\nEstablish performance baselines and capacity limits for the current platform\nBuild realistic user-journey and message-volume scenarios and execute them using load testing tools reviewed and approved by the engineering team (for example k6, JMeter, Gatling, Azure Load Testing or similar)\nAnalyse Function App behaviour: cold starts, scale-out limits, concurrency settings and hosting plan suitability\nAnalyse queue behaviour: throughput, backlog growth, poison messages, retry patterns and processing lag\nAnalyse Blob and Table Storage behaviour: throttling, partition design, hot partitions, storage account scalability targets and latency under load\nUse observability and monitoring tooling (for example Application Insights, Azure Monitor, Log Analytics or similar) to trace requests, correlate metrics and pinpoint root causes\nProduce clear performance reports with findings, risks and prioritised recommendations for both technical and non-technical stakeholders\nRecommend fixes and, where agreed, help implement them, then re-test to confirm the improvement\nDefine SLOs, regression thresholds and quality gates that can be built into our CI/CD pipeline\nEssential skills and experience\nProven experience as a Performance Test Engineer or Performance Engineer (typically 5+ years)\nHands-on experience with performance testing tools (for example k6, JMeter, Gatling, NeoLoad or similar)\nStrong background in bottleneck analysis and troubleshooting on cloud-hosted distributed systems\nSolid working knowledge of Azure serverless and storage services: Functions, Storage Queues, Blob Storage and Table Storage\nExperience with APM and observability tooling (for example Application Insights, Azure Monitor, Dynatrace or similar)\nAble to script in a language suited to the task (for example C#, JavaScript, Python or similar)\nStrong written communication skills, with the initiative to lead the work and the ability to collaborate closely with backend and DevOps teams\nDesirable\nExperience with cloud-based load testing services and CI/CD pipelines (for example Azure Load Testing, Azure DevOps, GitHub Actions or similar)\nFamiliarity with messaging and data services that could form part of a future scale-up path (for example Service Bus, Event Hubs, Cosmos DB, Durable Functions or similar)\nPrevious experience working with startups or scale-ups\nEngagement\nType: Contract, part-time\nHours: 10-15 hours per week\nDuration: initial term, e.g. 8-12 weeks, with option to extend\nLocation: remote / hybrid, Ireland-based preferred\nRate: €35 - €50/Hour\nReporting to: Head of Quality Assurance\nExpected deliverables\nA baseline performance report for the current platform\nA bottleneck and risk register, ranked by impact\nA scaling roadmap with recommended changes and effort estimates\nA reusable load test suite, ready to run in our pipeline","description_format":"text","description_chars":4393,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Ireland","iso":"IE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Consumer Electronics","Health Care","Wellness Programs"],"lifecycle":[{"event":"open","at":"2026-10-02T18:20:06Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":1,"expected_fill_days":46,"reasons":["conf:11","velocity","win:early"],"computed_at":"2026-10-03T05:45:00Z"},"pay":{"stated_usd_annual":112000,"is_top_pay":false},"html_url":"https://alion.io/job/sleep-performance-test-engineer","json_url":"https://alion.io/job/sleep-performance-test-engineer.json","meta":{"generated_at":"2026-10-04T01:50:16Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":2474,"day_limit":5000,"remaining_today":2526,"minute_limit":60,"resets_at":"2026-10-05T00:00:00Z"}}}