Senior Agentic Platform Engineer
Likely
Sponsorship likelihood
This employer has issued visas recently
Not disclosed
Salary
Not disclosed by employer
£54,700
Going rate
Skilled Worker going rate
This role likely qualifies for a Skilled Worker visa
SOC 2134 (93% match) is an eligible occupation, with a going rate of £54,700, and Seedtag Advertising is a licensed sponsor. That is our reading of the rules. Whether they issue a Certificate of Sponsorship is still their call.
New graduate or PhD holder? Pick one of the lower rates.
What each route needs for this job
| Occupation code | New entrant 70% of going rate | STEM PhD 80% of going rate | Relevant PhD 90% of going rate | Standard rate 100% of going rate |
|---|---|---|---|---|
2134 Programmers and software development professionals Most likely code | £38,300 | £43,700 | £49,200 | £54,700 |
We use the lowest threshold across the plausible codes. Likelihood is Possible at most when the pay clears only a lower rate, or only under a less likely code. How the Home Office picks the code
About the role
We’re looking for a Senior Agentic Platform Engineer to join our tech team and help build the future of neuro-contextual advertising at global scale.
Who We Are
At Seedtag, our mission is to transform advertising by proving that effectiveness and user privacy can truly coexist.
As the leading Neuro-Contextual Advertising Company, we combine Artificial Intelligence, Natural Language Processing, Computer Vision, and neuroscience to understand not only what content is about, but how it makes people feel and what they intend to do next.
Our proprietary AI, Liz, enables brands to connect with audiences across the open web and Connected TV without cookies or user tracking. Founded in 2014 by two ex-Googlers, Seedtag has grown to 500+ Seedtaggers in 17 countries, backed by €250M in funding, and operates today as a global ad-tech leader.
If you enjoy solving complex engineering challenges and building AI-driven systems at scale, you’ll feel right at home here.
Your Challenge
As our Senior Agentic Platform Engineer, you will take technical ownership of key components of Liz Agent, Seedtag's AI agent platform, ensuring scalability, reliability, and seamless integration across teams.
Your main responsibilities will include:
Agent Platform Development: Design, build, and maintain the core Liz Agent runtime, including agent execution, context management, and event streaming.
Tools & Integrations: Develop MCP tool servers, APIs, and authentication and policy services to enable secure agent access to internal data and capabilities.
Agentic AI Innovation: Enhance agent capabilities through multi-model routing, memory, durable execution, and LLM frameworks.
Reliability & Observability: Ensure platform stability, performance, and production debugging through monitoring, tracing, and evaluation tools.
Platform Architecture: Define scalable APIs, service patterns, CI/CD pipelines, and cloud-native deployment standards that enable teams to build agents independently.
Security & Quality: Implement robust security controls, prompt-injection protection, automated evaluations, and regression testing.
Technical Leadership: Drive architectural decisions, mentor engineers, and collaborate with Data, ML, Platform, and Product teams.
Our Core Values
Outcome over Output
We measure success by impact and value, not by volume of features or lines of code.
Failure Is Allowed, Learning Is a Must
Experimentation is key to innovation. We test early, iterate often, and learn fast.
We Are All Scouts
We take ownership and leave things better than we found them.
We Are Data-Driven
Data informs our decisions and helps us continuously improve our systems and results.
Tech Stack
You'll work with the technologies powering Liz Agent, our AI agent platform, built on 30+ services running on GKE.
Our stack includes:
Languages: Python, Go.
Cloud & Infrastructure: GCP, GKE, Kubernetes, Vertex AI, BigQuery.
Agentic AI: MCP, PydanticAI, Claude Agent SDK, LangGraph, OpenAI Agent SDK.
Data & Messaging: Pub/Sub, Redis, Firestore.
LLMOps & Observability: Langfuse, Prometheus, Logfire, LiteLLM.
DevOps & CI/CD: ArgoCD, Kustomize, GitHub Actions.
Additional Technologies: TypeScript, Next.js, embeddings, vector search.
What You’ll Need to Succeed
5+ years of experience building and maintaining production backend systems.
Strong Python expertise, including APIs, asynchronous programming, testing, and clean architecture.
Hands-on experience developing LLM applications or AI agents in production.
Solid understanding of event-driven architectures, microservices, Kubernetes, and cloud infrastructure.
Experience with LLMOps, observability, CI/CD, and production troubleshooting.
Knowledge of AI security, including authentication, access controls, and prompt-injection protection.
Proven ability to lead technical decisions, mentor engineers, and work autonomously in a collaborative environment.
Why Join Seedtag?
A key moment of growth with real ownership and global impact.
Flexible work model with 100% remote or hybrid options.
(Remote contracts available in Spain, Italy, UK, Belgium, Netherlands, France, and Germany.)Continuous learning through a learning platform and optional language classes.
A supportive, trust-based culture that values well-being.
Team activities, offsites, and opportunities to connect beyond work.
Additional Perks
Home office setup budget up to €1,000
Paid trips to our HQ in Madrid
MacBook Pro M3
Ready to Join the Seedtag Adventure?
At Seedtag, we create an environment where everyone can thrive. If you need accommodations during the hiring process, let us know and we’ll ensure a positive experience.
Send us your CV and let’s build the future of neuro-contextual advertising together.
This description is the source posting as it read when we added it. We are not affiliated with Seedtag Advertising, so check their own site for the current details.
Where this offer sits in the market
Programmers and software development professionals (SOC 2134) · UK · ONS ASHE 2025 · basic pay · ~399k in sample- Middle half £42,536–76,752
- Median £56,784
- Going rate £54,700
- Threshold £41,700
- New entrant £38,300–49,200
Similar sponsored roles
See all UK visa jobsNo close matches live right now.
Browse more sponsored jobs at Seedtag AdvertisingAbout sponsorship for this role
Does this job guarantee visa sponsorship?
Not necessarily. Seedtag Advertising holds a sponsor licence, but sponsorship for a specific hire is always the employer's decision. Be upfront in your application that you'll require it.
What salary is needed for this role to be eligible?
The offer must clear both the general threshold and the SOC 2134 going rate of £54,700. New-entrant and shortage discounts can lower it.