Senior Software Engineer
FluxonQueluz e Belas, Portugal
Posted January 13, 2026
Full Time
About the Company
Fluxon is a product development team founded by ex-Googlers and startup founders, offering full-cycle software development from ideation to go-to-market.
Job Description
Fluxon is seeking a Senior Software Engineer to lead in designing, building and deploying AI-powered applications for clients. The role involves system architecture, generative AI development, production engineering, evaluation & monitoring, collaboration, and model optimization.
Requirements
- 5+ years of industry experience in software engineering roles
- Strong proficiency in Python or any preferred AI programming language
- Strong understanding of Transformer architectures, embeddings, and vector similarity search
- Experience integrating with LLM provider APIs
- Hands-on experience with agent workflows like LangChain, LangGraph
- Experience with Vector Databases and traditional SQL / NoSQL databases
- Familiarity with cloud platforms, preferably GCP or AWS
- Understanding of patterns like RAG (Retrieval-Augmented Generation), few-shot prompting, and Fine-Tuning
- Solid understanding of software development practices including version control (Git) and CI/CD
Benefits
- Competitive salary
- Fully remote work with flexible hours
- Flexible paid time off
- Profit-sharing program
- Healthcare
- Parental leave, including adoption and fostering
- Gym membership and tuition reimbursement
