Role SummaryWe are building a world‐class team to evolve a high‐performance, event‐driven ecosystem. We don't just write code; we architect solutions that handle complex financial and data workflows. As a Senior Software Engineer, you will be at the forefront of our migration to. NET 8 and the integration of Generative AI (LLMs) into our core product.This is a role for an engineer who understands that a system is only as strong as its weakest link—whether that's a race condition in an SQS queue or a poorly optimized Redis cache. You will work in a modern stack, moving away from legacy infrastructure towards a cloud‐native, AI‐augmented future.National and international expected traveling time: 0%-15% estimated.What you will be doingHigh-Scale Development: design and implement robust microservices using. NET 8, focusing on performance, scalability, and clean architectureEvent-Driven Architecture: build and refine asynchronous workflows using AWS SNS/SQS, ensuring data consistency and system resilienceAI Integration: lead the technical implementation of LLMs into our applications, bridging the gap between. NET backends and Python-based AI logicData Engineering: collaborate on the design of high‐throughput data pipelines using AWS Data Firehose and Data Streams for real‐time processingQuality & Testing: maintain a high bar for code quality using x Unit and Wire Mock, ensuring that our transition to new services is seamless and regression‐freeInfrastructure Collaboration: work closely with SREs to deploy services via Git Hub Actions and manage resources through TerraformModern Tooling: leverage Git Hub Copilot and Chat GPT to accelerate delivery while maintaining critical oversight of code security and efficiencyExpertise we are looking for. NET Mastery: deep expertise in C# and. NET Core /. NET 8. You must know the framework's internals, not just the syntaxAWS Native Experience: practical experience building applications that leverage SNS, SQS, S3, and ECSDistributed Systems: strong understanding of Event-Driven Architecture and patterns (Pub/Sub, Competing Consumers, Idempotency)Caching Excellence: proven experience with Redis or Valkey for state management and performance optimizationAI/ML Curiosity: experience or strong interest in working with LLMs and Python. If you've built RAG systems or integrated Open AI/Anthropic APIs, you are ahead of the curveTesting Rigor: a "test-first" mindset. If you don't value unit and integration testing, you won't survive our deployment cycleDev Ops Awareness: familiarity with Docker, Git Hub Actions, and Terraform. You don't need to be an SRE, but you must speak their languageBenefitsPermanent contractUnlimited PTOFlexible working hoursTraining & conferences, create your own training planWork with large-scale systems powering global businessesChoose laptop & peripherals that best suit your needsHotspot with unlimited usage (PT), for work or NetflixWe have amazing offices in Porto, Aveiro, and Coimbra if you want to physically connect with minders. Remote from Portugal is also an option. Remote from other countries will depend on your current location and projectsAt the offices, we have a wide range of snacks to keep you fed and healthyPartnerships with local businesses