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Senior Data Engineer
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Senior / Staff Data Engineer (Streaming & Experimentation) - Contract
Tech: Kafka, Scala / Kotlin / Python, event streaming, Optimizely and feature-flagging platforms
Office: Fully remote (Must be located in the UK)
Rate: £650 per day Outside IR35
Duration: 6 months initial, with a strong chance of extension
Start: ASAP
What you’ll do:
- Own the architecture and delivery of production streaming pipelines and the data layer they feed
- Lead the design of the next generation of streaming frameworks, so new data sources can be onboarded quickly and reliably
- Support and extend the experimentation stack (Optimizely, feature flags and A/B testing), making sure results can be trusted
- Define and drive data contracts, freshness standards and alerting, so downstream teams can rely on the data by default
- Work directly with stakeholders across data, analytics, ML and insights, agreeing boundaries and priorities rather than waiting to be handed them
- Be the escalation point for complex streaming issues, and raise engineering standards through design and code reviews
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What they need:
- A track record of designing, building and running production streaming or event-driven systems at scale, ideally on Kafka
- Strong programming in at least two of Scala, Kotlin or Python
- Solid grasp of Kafka Connect, schema registries and distributed systems, including failure modes, backpressure and data loss
- Hands-on experience with Optimizely or a comparable experimentation and feature-flagging platform, including supporting A/B tests and trusting their results
- Hands-on experience with data quality, freshness and observability practices
- Senior to staff-level ownership: shaping direction, not just delivering against it
- Confident stakeholder management
- The right to work in the UK without sponsorship
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Interested? Apply now or email me directly at swyld@trg-uk.com with your latest CV and a few lines on your streaming and experimentation experience. All conversations are confidential.
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