Automation & Performance Engineer | 12 weeks+ (575)

About the opportunity A full-time engineer covering two complementary needs across both apps: test automation on Nehemiah Layer and performance/load testing on CALL-IT. On the control plane you help automate the adversarial and functional suites into repeatable CI runs; on the real-money platform you design load tests for the high-traffic paths. The through-line is engineering rigor applied to making tests fast, repeatable, and meaningful. About our client Our client is preparing two AI-driven platforms for enterprise readiness, with a focus on security, correctness, and financial integrity ahead of a production launch. What you’ll do Build and maintain automated test suites for the Nehemiah decision path, integrated with the freeze-audit CI gate. Design and run performance and load tests for Nehemiah intercept latency and throughput — the layer cannot become a bottleneck. Design and run load tests for CALL-IT high-traffic paths (as a later pass in that workstream). Build test harnesses and data generators that respect each platform’s gated identity and account rules. Report performance findings and bottlenecks with clear evidence and reproduction steps. What you bring (must-haves) Strong test-automation experience (Python preferred for the Nehemiah side; JS/TS useful for CALL-IT). Hands-on performance / load testing (k6, Locust, JMeter, Gatling, or similar) with sound methodology. CI/CD fluency (GitHub Actions or equivalent) and Docker. Ability to reason about latency and throughput in a service that sits in the request path. Clear written English and evidence-based reporting. Bonus points for (nice-to-haves) Experience load-testing payment or transactional systems. Familiarity with Render, Vercel, and Supabase. Observability / profiling background. Perks & benefits 💻 Equipment provided — none of that “bring your own device” stuff here 🛡️ Full back-office support — Legal, Accounting, HR Business Partner, and Delivery team 🧭 Career and cultural mentoring — how to show up, stand out, and navigate US work culture 🗣️ Free English lessons with a native speaker 🤝 Referral bonus — recommend Ubi to your tech friends and get paid for it 🏖️ Florianópolis HQ always open — 100% remote, but the office is there whenever you want it. How the process works Interview with our Tech Recruiter (+ quick AI assessment, if needed) Client interview process (varies by company) Offer 🎉 Onboarding with full Ubiminds support Why Ubiminds? With 9 years in the market and GPTW-certified, Ubiminds connects Latin American tech professionals with software companies in the US and Canada. Hundreds of professionals in data, design, product, and engineering are already growing in North American teams with our support. We’re with you throughout the entire journey — Recruitment, Legal, Accounting, PeopleOps, and career guidance — so you can thrive internationally with confidence. Ready to go global? Apply now — it takes less than 5 minutes. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.