Senior ML Engineer at Trustentia, Remote, 5 Months, Part-Time, £400-£550 per day

Senior ML Engineer (Part-Time, Remote, UK-Based)

5-month part-time contract Start 1st December 2025

About Truzentia

UK Innovation Grant Recipient We’re building production-grade conversational AI infrastructure with behavioural science, data sovereignty, and real-time voice at its core.

The Role

• Part-time, flexible (20–25 days total across 5 months)
• Remote, UK-based only (must have right to work in the UK)
• Start: 1st December 2025
• Rate: £400–£550 per day depending on experience.

Must-Have Skills

- Python - Expert (5+ years, production)
- LLM Fine-Tuning - LoRA / QLoRA on latest models ( GPT-4o, Qwen 2, Llama 3.1, Mistral Large )
- RAG Pipelines -End-to-end (chunking, retrieval, evaluation)
- LangChain - Primary framework – multi-agent orchestration, tool calling, memory graphs
- Voice AI (TTS + STT) - Must have : Real-time speech (ElevenLabs, Deepgram, Whisper, Bark)
- Graph-Based Memory - Neo4j + relational embeddings
- Hugging Face - Model hub, inference, fine-tuning pipelines
- FastAPI - REST + real-time endpoints (/transcribe, /respond, /orchestrate)
- Git + CI/CD - Clean PRs, automated testing

Bonus Skills
-* React / Next.js* - Light front-end integration (chat UI, voice results)
- AWS SageMaker - Managed GPU training, auto-scaling, enterprise security (vs Hugging Face for cost/scalability)
- Open-Source Contributions - GitHub with AI/voice/agent projects
- Production Monitoring - Logging, error handling, latency <1s, token tracking

What You’ll Deliver

• Fine-tuned LLM (LoRA on behavioural + voice datasets)
• RAG + graph memory engine (Neo4j + relational embeddings)
• Real-time voice pipeline (TTS/STT, low-latency, streaming)
• Multi-agent orchestration (LangChain, tool calling, agent-to-agent comms)
• FastAPI endpoints (production-ready, monitored, scalable)

All systems must be robust, tested, and production-ready. Timesheets + milestone reporting required.

Include: Links to 1 - 2 production LLM/Agent systems deployed not experiments. Github link.

We are looking to hire immediately, so interviews are starting the week of the 3rd November and we will move fast.

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Job Types: Part-time, Freelance

Pay: £400.00-£550.00 per day

Benefits:

• Flexitime
• Work from home

Application question(s):

• How many days do you estimate to complete this work?

Experience:

• Python: 5 years (preferred)
• LangChain: 1 year (preferred)
• Fine Tuning Open Source models: 1 year (preferred)

Work authorisation:

• United Kingdom (required)

Location:

• United Kingdom (required)

Work Location: Remote