Senior Software Developer - flexible working

Overview A fast-growing, venture-backed technology business is expanding its engineering team as it scales both its product and underlying platform. As part of this growth, the team is looking to hire a Senior Python Engineer to take ownership of AI-led initiatives. This role goes beyond traditional development. The successful person will be responsible for shaping architecture, making key technical decisions, and driving the design and delivery of advanced AI systems from the ground up. The Opportunity You will be building autonomous, reasoning-driven systems designed to address complex, real-world operational challenges. This includes working on problems such as optimisation, intelligent automation, and advanced user-facing solutions. The focus is on designing and implementing agentic architectures that deliver meaningful business value, rather than simple integrations or API wrappers. Core Technologies Python (expert-level proficiency expected) Modern AI frameworks (e.g. agent orchestration libraries and LLM-based tooling) Vector databases (e.g. Pinecone, Milvus, Weaviate or similar) LLM orchestration and tool-calling pipelines REST and GraphQL API design Key Focus Areas Designing systems that leverage reasoning loops within large language models Building self-correcting and adaptive AI architectures Implementing prompt engineering at production scale Developing and managing multi-agent workflows Optimising retrieval systems and memory strategies (RAG architectures) Requirements ~5+ years commercial experience with Python/PHP ~ Proven experience delivering production-grade AI systems (not just prototypes) ~ Hands-on experience building autonomous systems, agents, or task-based AI workflows ~ Strong system design and architectural capability ~ Ability to clearly articulate complex technical concepts to non-technical stakeholders Working Model Hybrid model with a strong on-site collaboration culture Typically 4 days per week in-office to support design sessions and planning Compensation Competitive salary depending on experience Flexible approach to total package depending on the individual and role scope Additional Information The company operates an inclusive hiring process and welcomes applications from a wide range of backgrounds. Adjustments can be made throughout the process where required.