Senior Data Scientist

Once For All Limited; Basingstoke; Remote; GBP 70,000 - 90,000; Full time

Job summary

A high-growth cloud-based SaaS company is seeking a Senior Data Scientist to design and build integrated AI solutions, primarily focused on automating document verification processes. The candidate must excel in Python development, possess strong software engineering best practices, and communicate effectively with technical and non-technical stakeholders. This role offers a competitive salary and a remote-first culture, with extensive professional development opportunities.

Benefits

Competitive salary

Wellness fund

Private Medical Insurance

Pension & Life Assurance

25 days annual leave + public holidays

Continuous professional development budget

Qualifications

• Experience in test-driven coding and structuring Python packages.
• Ability to design and deploy AI extraction workflows.
• Hands-on with containerized micro-services.

Responsibilities

• Translate business problems into MVPs and production-ready services.
• Develop, package, and maintain shared Python libraries.
• Design and deploy LLM-based workflows over document collections.

Skills

Expert-level Python developer

Software-engineering best practices

Multi-modal AI experience

MLOps tooling experience

Strong communication skills

Tools

FastAPI

Kubernetes (AKS preferred)

Streamlit

Dash

MLflow

Job description

**Senior Data Scientist**

Location : Remote‑first (**UK only**)

Reports to : Lead Data Scientist

Department: Innovation Team

Type: Full‑time, Permanent

Once For All is a high-growth, cloud-based SaaS company. Our platform helps 250k+ customers across the UK & Europe manage supply-chain governance, risk and compliance. We are embarking on a transformation — by placing intelligent, automated decision-making at the heart of our systems & processes.

Role Summary

We’re looking for a Senior Data Scientist with strong python development background or AI/ Python Engineer who will design and build integrated AI solutions. You will be responsible primarily for delivering AI solutions we are looking to embed across the business, initially building solutions that assist our verification teams in extracting, reasoning over and validating documents.

You’ll additionally help drive initiatives focused on document reasoning for verification over ESG and sustainability documents, helping our customers evidence compliance with ever‑evolving standards.

Key Responsibilities

- Translate high‑level business problems into rapid MVPs, then production‑ready services.

- Develop, package and maintain shared Python libraries; ensuring robust and clean architecture, testing and CI/CD standards.

- Design and deploy LLM‑based extraction, RAG and agentic workflows over large document collections, and drive value through integration of latest AI tech (agentic workflows etc.)

- ️ Communicate clearly with technical and non‑technical stakeholders.

Required Skills & Experience

- **Expert‑level Python developer** — idiomatic, test‑driven coding, structuring packages, collaborating in shared mono‑repos and deploying containerised FastAPI micro‑services on Kubernetes (AKS preferred).

- Strong general grounding in **software‑engineering best practices**: CI/CD, automated testing, code reviews, observability and performance profiling.

- ️ Experience using multi‑modal AI (document layout, vision‑language models, building agents).

- Experience building quick prototypes (e.g. Streamlit, Dash) to validate ideas rapidly.

- MLOps tooling (e.g. MLflow) and model monitoring experience.

- Strong communication skills and action‑oriented.

Nice to Have

- ️ Hands‑on with Azure services (Storage, Container Registry, OpenAI Services).

- Demonstrated experience building extraction/ reasoning systems over documents.

- French or Spanish language skills are a bonus.

What We Offer

- Competitive salary and remote‑first working culture.

- ️ Team & company offsites across Europe.

- Wellness fund / Private Medical Insurance*.

- Pension & Life Assurance (3× salary).

- 25 days annual leave + 8 UK public holidays.

- Holiday purchase scheme (up to 5 additional days).

- 1 paid & 1 unpaid volunteering day per year.

- Continuous professional development budget and access to leading AI tooling.