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With a passion for crafting timepieces that thrive across air, land, and sea, we bring together a unique fusion of casual elegance, sustainability, and inclusive luxury. With 140 years of heritage and over 1,900 passionate individuals across 20 countries, we’re excited to continue our journey forward — and we’re now expanding our presence with a new Business Service Center in Warsaw, Poland, a key hub primarily for our growing Digital & Tech-squads. We are offering a hybrid role, with visits to Warsaw office and on the basis of full-time job contract. Join our vibrant team in Warsaw as a Senior Backend Engineer and be a part of something extraordinary! As a Senior Backend Engineer, you will accelerate feature delivery for Breitling’s e‑commerce platform to maximize brand value and conversion, ensuring readiness and resilience for launches, drops, and global campaigns. You’ll design and operate scalable, reliable, and secure event‑driven services, elevate engineering quality through reviews, mentoring, testing, and documentation, and own the continuous improvement of integrations with key external systems (e.G., Algolia, Yext, Adyen, DAM, PIM, ERP/OMS, CRM) with a focus on compliance and operational excellence. Success in this role hinges on strong collaboration, clear communication, and an unwavering commitment to product quality. You will own and improve integrations with external systems such as search/content (Algolia, Yext), payments (Adyen, Stripe, etc.), DAM, PIM, CMS, ERP/OMS, CRM, tax/VAT (Avalara/Avatax), shipping, and fraud detection (Riskified). You will build and evolve Python/FastAPI services with async I/O (asyncio), REST/OpenAPI, and GraphQL. You will implement event-driven workflows using Azure Service Bus with idempotency, DLQs, retries, and backpressure. You will investigate and resolve operational issues using Datadog (APM, logs, metrics), Sentry (error monitoring and release health), and Azure Service Bus Explorer for message tracing and DLQ analysis. You will document designs and decisions, mentor engineers, and lead technical initiatives. Do you think there is even more to discover in this role? You have 5+ years of professional backend engineering experience with production ownership. You have demonstrated experience in designing and operating distributed, event-driven systems. You are fluent in English, both written and spoken. You have strong time management and organizational skills. You have an ownership mindset with a strong bias for action. You have hands-on experience with PostgreSQL, including indexing, migrations, and query tuning. You are experienced with CI/CD pipelines and testing frameworks such as pytest (unit and integration). You are familiar with AWS (EKS, SQS/SNS, RDS, DynamoDB, IAM) in addition to Azure. You maintain high code quality using tools such as type hints/mypy, ruff/flake8, Black, and pre-commit. We prioritize the well-being of our employees by fostering an environment of diversity, equity and inclusion, where every voice is heard and valued. Home office (depending on position requirements) We value diversity and are committed to fostering an inclusive environment that reflects the excellence and refinement that define our brand.