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On-site in London·Added 4 days ago (last checked 27 Oct)
8 open roles
Our summary
- Work mode
- On-site, London
- Experience
- 12+ years


Skills
The role
This is not a slide-making or prompt-engineering role. We are looking for someone who has built systems that run in production, not demos, not pilots that died after a sprint, and who can sit across the table from a client CTO and tell them what to do next. Two halves, and we mean both. You will architect and deliver AI-native programs end to end. You will also carry a point of view on where this market is going, walk clients through it, and help them stand up their own AI capability covering practice structure, operating model, tooling and governance. You will report into and replicate the function of a senior AI delivery leader. That means the depth to design the system, the hands to build it, and the presence to defend it in a room full of executives. At 12 to 15 years, we are not looking for someone whose engineering career started with LLMs. We want the years before that: the production systems, the outages, the architecture calls that turned out wrong and what you learned.
AI Engineering
Two capabilities that do not come free with an engineering background. These are the ones we probe hardest.
Evaluation and Error Analysis
You have built an eval set for a non-deterministic system and used it to make a decision
You can decompose a failure: is this a model problem, a retrieval problem, a data problem or a product problem?
You debug agent behaviour systematically, with traces and evidence, not by gut feel
Context Engineering
Deliberate management of what enters the model on each turn, and why
Memory strategy: what persists across steps, across sessions, and what should not
Tool surface design: what the agent can reach, how it is scoped, what happens when a tool fails
Cost and latency as first-class design constraints, not something discovered in the invoice
Consulting and Client Leadership
Equal weight to the engineering. This is a client-facing role in a services business.
Carry a market point of view on models, tooling and delivery patterns, and translate it into what it means for a specific client, in their language
Run discovery workshops, solution reviews and delivery cadences with client teams
Advise clients on standing up their own AI capability: practice structure, operating model, skills, governance, build versus buy, and adoption across their engineering org
Shape and defend technical proposals, PoC plans and roadmaps. Own the story end to end
Translate business problems into architectures for CXO-level stakeholders without hiding behind jargon
Say no when the answer is no. Tell a client when agents are the wrong tool, and be able to explain why
Delivery and Architecture
The work itself.
Own end-to-end delivery of AI-native programs, from architecture through production
Design multi-agent orchestration using LangGraph, CrewAI or equivalent. Agent topology, tool routing, memory, state, fallback and recovery paths
Integrate agent systems with enterprise systems of record, not toy datasets
Build RAG where RAG is the right answer, from chunking through retrieval, re-ranking and evaluation
Run agentic coding workflows with Claude Code, Cursor, Codex or equivalent, and lead projects where AI writes significant portions of the codebase while you guide, review and ship it
Work with MCP and shared-context tooling. Design what agents are permitted to reach and under what controls
Bring governance into the design from day one: agent identity, privilege scoping, audit, human-in-the-loop, kill switches
Contribute to reusable frameworks and accelerators the wider practice can use
What We Are Not Looking For
Someone who lists LLMs on a resume but has only called the API in a notebook
People who explain everything in terms of frameworks they have never deployed
Consultants who can only narrate what others have built
Engineers who cannot hold a client conversation, and client-facing people who cannot build
How We Will Evaluate You
Stage 0, System design with no AI. A distributed systems problem with no LLM in it. Event flow, data model, failure handling, scale. Twenty-five minutes.
Stage 1, Technical screen. Walk us through a system you built. Bring an artifact: an eval set, a trace from a run that failed, a postmortem, a cost-per-task number. Something real, not slides.
Stage 2, Architecture discussion. A business problem, live. Design the solution and defend the trade-offs, including the decision not to use agents.
Stage 3, Client simulation. Present your approach to a non-technical executive audience, then advise them on how to build the capability internally.
About Zensar Technologies
In their own words
About the company & team
Build AI engineering capability across the delivery organisation through mentoring, standards and review quality
Evaluate new models, frameworks and tooling before the hype catches up, and kill the ones that do not earn their place
Contribute to internal knowledge bases and practice assets
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