Senior Software Engineer

Who we are We are Fluxon, a product development team founded by ex-Googlers and startup founders. We offer full-cycle software development: from ideation and design to build and go-to-market. We partner with visionary companies, ranging from fast-growing startups to tech leaders like Google and Stripe, to turn bold ideas into products with the power to transform the world. The role is open to candidates based in Portugal preferably in Lisbon. About the role As an AI Engineer at Fluxon, you'll take the lead in designing, building and deploying AI-powered applications for our clients. You'll be responsible for: System Architecture : Design and implement end-to-end AI systems and their parts, including data ingestion, preprocessing, model inference, and output structuring Generative AI Development : Build and optimize RAG (Retrieval-Augmented Generation) systems and Agentic workflows using frameworks like LangChain, LangGraph, ADK (Agent Development Kit), Genkit Production Engineering : Deploy models to production environments (AWS/GCP/Azure) using Docker and Kubernetes, ensuring high availability and scalability Evaluation & Monitoring : Implement feedback loops to evaluate model performance (accuracy, hallucinations, relevance) and set up monitoring for drift in production Collaboration : Work closely with other engineers to integrate AI endpoints into the core product and with product managers to define AI capabilities Model Optimization : Fine-tune open-source models (e.g., Llama, Mistral) for specific domain tasks and optimize them for latency and cost You'll work with technologies including: Languages Python (Preferred) Java / C++ / Scala / R / JavaScript AI / ML LangC Please mention the word **POLISHED** and tag RMjYwNzo1MzAwOjIwZDo3ZDAwOjo= when applying to show you read the job post completely (#RMjYwNzo1MzAwOjIwZDo3ZDAwOjo=). This is a beta feature to avoid spam applicants. Companies can search these words to find applicants that read this and see they're human.