Performance Engineer Hybrid – Belgium | Full-time (CDI preferred)Join a fast-growing SaaS company using AI & big data to help pharma companies detect and fix risks in clinical trials.We’re looking for a Senior Performance Engineer to take the lead on performance testing, observability, and system optimization within a dynamic product team. What You’ll Be Working OnAs our Senior Performance Engineer, you’ll be the go-to expert ensuring our systems run smoothly at scale. You'll collaborate with engineering, architecture, and DevOps to build a high-performance, observable platform that supports thousands of users globally.You will: Design, evolve and implement performance testing and observability frameworks Build and maintain monitoring dashboards using Grafana, DataDog, Splunk, etc. Run and analyze load & stress tests to identify bottlenecks and define optimization strategies Partner with development teams to improve code and infrastructure performance Integrate observability into our CI/CD pipelines (GitLab CI, Jenkins, GitHub Actions) Continuously monitor and tune backend systems, databases, and cloud infrastructure Tech Environment You’ll Dive IntoYou don’t need experience with everything on this list, but you should feel at home with a modern DevOps / performance engineering stack:Load Testing & Profiling: K6, Gatling, JMeter, LoadRunner, BlazemeterObservability & APM Tools: Grafana, Prometheus, DataDog, Splunk, Dynatrace, New RelicAutomation & DevOps: Docker, Kubernetes, Linux, GitLab CI/CD, GitHub ActionsLanguages & Scripting: Python, TypeScript, JavaScript, BashDatabase Tuning: Strong understanding of SQL and system metrics What We’re Looking For Degree in Computer Science, Engineering, or related field 5+ years of experience in performance engineering, systems monitoring, or site reliability Strong analytical skills with a passion for performance tuning and system design Collaborative team player with clear communication skills across functions Proactive mindset – you love solving complex problems and making systems better Why Join Us? Impact: Help reshape clinical trials through tech innovation Autonomy: Be the performance expert driving strategic decisions Culture: Collaborative, cross-functional teams that support continuous learning Flexibility: Hybrid model with 1 day onsite, rest remote Growth: Join a growing company investing heavily in its tech and people Competitive Compensation: Salary + mobility budget, meal vouchers, insurance & more Contract Type: Permanent full-time Interested?Let’s talk! Whether you're currently exploring new opportunities or just curious, we’d love to connect.