Senior Python Engineer (Performance & Architecture) — PCORE Team

🚀 Welcome to Your Next Adventure! We are looking for a strong Senior Python Engineer to join the PCORE team and help improve the architecture, reliability, and performance of mission-critical Python services used in production at scale. Some services were originally developed by Data Science teams with strong domain expertise, and now require additional engineering maturity around scalability, maintainability, observability, and operational excellence. You will work closely with platform engineers, architects, DevOps, and Data Science teams to analyze existing systems, identify bottlenecks, introduce best practices, and drive technical improvements across the service lifecycle. 🛠 What You’ll Get Your Hands On Analyze and improve performance of Python microservices running in production Optimize CPU, memory usage, latency, concurrency, and throughput Review existing architecture and propose improvements Introduce engineering best practices for: project structure testing observability CI/CD reliability security code quality Work with FastAPI-based services and asynchronous Python code Profile and debug production issues under real traffic load Improve resiliency and fault tolerance of distributed systems Collaborate with Data Science teams to productionize ML-related workloads Help define standards and technical direction for Python services inside the organization Participate in incident analysis and postmortems when needed 🧙‍♂️ The Magic You Bring 5+ years of professional Python development experience Strong experience with backend microservices in production environments Deep understanding of: FastAPI asyncio concurrency and parallelism multithreading vs multiprocessing packaging tools, pip, uv, C libraries Strong knowledge of: profiling and performance optimization memory leak analysis networking, understanding async I/O at OS level, network diagnostics caching strategies Experience with: Container optimization, layer caching, multi-stage builds Kubernetes / ECS AWS, IaC Redis / PostgreSQL / MongoDB performance optimization message brokers (RabbitMQ/Kafka) ML libraries, i.e Numpy, Deep Learning frameworks, Feature Engineering Strong understanding of distributed systems and system design Experience with observability tools: Prometheus Grafana Datadog OpenTelemetry Good understanding of production reliability practices: retries circuit breakers backpressure health checks autoscaling Experience working with CI/CD pipelines Strong communication skills and ability to mentor others Experience working with ML/Data Science teams ✨ Bonus Points If You Have Experience optimizing inference services or data pipelines Knowledge of gRPC and high-performance APIs Experience with load testing and benchmarking tools Experience in high-scale environments (24/7 systems, high RPS) Contributions to open-source projects Inside Snoonu’s Universe Snoonu is Qatar’s homegrown Super App, reinventing daily life with blazing-fast delivery, shopping, and more – all in one place. Powered by tech, driven by a global team, and obsessed with making life easier. The Dream We’re Chasing To be the first Qatari Ultra App that propels the region and its community through innovation and technology. We have global ambitions where what we do surpasses norms and limitations every time. The Quest We’re On To radically transform how people live by leveraging technology to connect them with endless possibilities. Our Everyday Superpowers 👥 Be Customer Obsessed : “Focus on the customer and all else will follow.” 💪 Act with Integrity: “We are honest, ethical, and trustworthy in everything we do.” 🧪 Be Curious and Creative: “We constantly innovate and create solutions to bring a lasting positive impact.” 🏅Lead by Example and Take Ownership: “Be the change you want to see and take ownership.” 🚀 Work Smart and Deliver Results : “You can do more by doing less, better, and faster.” 👨‍💼 It's All About People: “Be a team player; together we are stronger.” Perks & Worklife Magic At Snoonu 🌐 Global Vibes – Collaborate with a worldwide crew. 🧠 Brain Boosters – Learning budgets, access to courses, and tools for your growth. 🚒 Builder’s Playground – Own your tasks, own your path! We’re big on autonomy. 🏝️ Flexible Time Off – We take recharging seriously. Generous leave and wellness policies. 🛠️ Agile Everything – Scrum isn’t a buzzword here. It’s how we roll, from product to ops. Great Place to Work® Certified We’re certified as a Great Place to Work®, a recognition that celebrates a culture we’ve built together where people come first, always. This certification reflects our commitment to creating a workplace where everyone feels valued, empowered, and inspired to do their best work. Certified for Excellence Our ISO 9001:2015 and ISO 45001:2018 certifications demonstrate our dedication to world-class quality and a safe, supportive workplace, reinforcing our promise to deliver exceptional service while prioritizing the wellbeing of our people. Beyond the Code: Giving Back Matters We don’t just build apps. We’re committed to doing business sustainably and giving back to the community that fuels us. From eco-conscious practices to CSR projects, we’re always finding ways to do better—and we invite you to be a part of that mission. Diversity Isn’t Just a Buzzword At Snoonu, fairness and inclusion are the foundation of everything we do. We’re proud to be an equal opportunity workplace that welcomes people from every walk of life. Be bold. Be you. Thrive here. Let’s Build the Future Together Apply now to join a team where your contributions spark a change and your voice is heard. Let’s make some magic together. Stay in the loop—connect with us on LinkedIn!