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Principal Software Engineer (Hybrid)

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Principal Software Engineer (Hybrid) in UK new

  • 8th Light
  • Full time
  • Email
  • London

Responsibilities

  • Build and lead delivery of reusable platforms, internal developer platforms, infrastructure, and production-grade software.
  • Lead platform strategy, architecture, modernization, replatforming, and scalable system design for client engagements.
  • Develop and integrate AI/ML and agentic systems across the ML lifecycle, including data ingestion, preprocessing, deployment, integration, and monitoring.
  • Advise clients on architecture, scalability, reliability, performance, security, observability, and platform evolution.
  • Coach client engineering teams, transfer knowledge, mentor colleagues, and improve engineering practices.
  • Facilitate retrospectives, strategy sessions, technical deep-dives, feedback conversations, and stakeholder alignment.
  • Design and manage high-level technical roadmaps and document architectural decisions and outcomes.
  • Influence client CTOs and executives while partnering with account teams on opportunity identification and pre-sales scope shaping.
  • Contribute to internal workshops, hiring processes, company culture, and the wider technology community.

Requirements

  • Typically 10+ years of repeated success across a variety of software projects and consulting engagements.
  • Demonstrated expertise leading ambiguous initiatives, architecting scalable solutions, and delivering production-grade platforms and software.
  • Experience with multiple language paradigms, stacks, ecosystems, and client industries.
  • Experience taking AI and agentic systems from prototype to production, including infrastructure, authentication, and observability.
  • Experience building or integrating AI/ML features such as recommendation engines, NLP, computer vision, predictive analytics, RAG pipelines, and agents.
  • Experience with modernization, replatforming, modular architecture, testing strategies, observability, fault tolerance, and secure engineering practices.
  • Strong stakeholder communication, consulting, technical leadership, mentorship, and product-thinking capabilities.
  • Preferred experience in platform engineering, data engineering with Databricks, production agentic systems, vector search, LangChain, LlamaIndex, CrewAI, AutoGen, n8n, DevSecOps, DevOps, MLOps, and infrastructure as code.

Benefits

  • Hybrid London arrangement requiring at least one day per week in the Waterloo office, with consulting engagements generally not requiring travel.
  • Unlimited access to books, courses, and expert-led training through the O'Reilly learning platform.
  • Annual financial stipend and dedicated time for learning and development.
  • Coworking support for the global team.
  • 12 weeks of new parent leave for eligible employees.

8th Light

We ship AI. 8th Light provides product strategy, design, and engineering for the work that earns its way to production. Agentic products, deep platform expertise. Since 2006, 8th Light has helped ambitious organizations find the right thing to build, and then build it. Through this important work...

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