INFORMATION FOR REGISTERED CANDIDATES WITH HARNHAM


KID DOCUMENTS
On this page you will find your KID (Key Information Document) and information about the alternative options available to you via our preferred list of Umbrella companies.
UMBRELLA COMPANY 1
GIANT - For almost 30 years giant have provided specialist, end to end workforce management software and support services to large and small recruitment agencies, internationally.

UMBRELLA COMPANY 2
PAYSTREAM - A market leading business providing a range of payroll and accountancy services for recruitment agencies and contractors.

UMBRELLA COMPANY 3
SAPPHIRE - Working through our umbrella company is a quick and easy solution for contractors, without having to file paperwork. By joining Sapphire, we’ll be with you every step of the way by offering you top of the line employment support and benefits.

UMBRELLA COMPANY 4
WORKWELL (FORMERLY JSA) - Enjoy the freedom & flexibility of contracting whilst they provide benefits such as holiday and sick pay. Unlike a limited company structure, there’s no admin to worry about – you simply work and get paid, and they take care of the rest.

JOBS
LATEST CONTRACT
OPPORTUNITIES
Harnham are a specialist Data & Analytics recruitment business with a dedicated Contract and Freelance team, working across the UK, US and Europe.

Senior Full-Stack/Data Engineer
London
£450 - £500
+ Computer Vision
ContractLondon
To Apply for this Job Click Here
You’ll also support image segmentation, real-time 3D asset generation, and contribute to intelligent BI tools and RAG-based features that enrich the meeting experience.
Must-Haves
- YOLO expereince
- Generate 3D visual assets from static images
- Full-stack engineering background (TypeScript preferred)
- Strong backend and systems experience
- Comfort with AWS, DynamoDB, PartiQL
- Experience building and owning microservices end-to-end
- Experience with API integrations, scheduling, data pipelines
- Fast, pragmatic, startup-minded engineer who can wear multiple hats
Nice-to-Haves
- Image segmentation (YOLO or similar)
- 2D to 3D asset conversion
- Familiarity with real-time video/image workflows
- RAG pipelines and LLM integration
- Unreal Engine or similar 3D platforms
To Apply for this Job Click Here

Full Stack AI/ML Engineer
City of London
£400 - £500
+ Computer Vision
ContractCity of London, London
To Apply for this Job Click Here
Company Overview
This is a VC-backed spinout from a £50m+ revenue parent business, born out of a highly successful virtual events service developed during the pandemic. The original model paired high-end live video production with a managed virtual platform, used by senior executives and FTSE-level sponsors for industry roundtables.
The goal now is to take that model-traditionally powered by a live production crew-and turn it into a lower-cost, scalable SaaS platform using real-time AI, 3D graphics (Unreal Engine), and automation. The MVP is nearly ready and the platform is now hiring key engineers to help take it to the next stage.
Must-Haves
Full-stack engineering background (TypeScript preferred)
Strong backend and systems experience
Comfort with AWS, DynamoDB, PartiQL
Experience building and owning microservices end-to-end
Experience with API integrations, scheduling, data pipelines
Fast, pragmatic, startup-minded engineer who can wear multiple hats
Nice-to-Haves
Image segmentation (YOLO or similar)
2D to 3D asset conversion
Familiarity with real-time video/image workflows
RAG pipelines and LLM integration
Unreal Engine or similar 3D platforms
To Apply for this Job Click Here

Qlik Developer
London
£500 - £550
+ Advanced Analytics & Marketing Insights
ContractLondon
To Apply for this Job Click Here
Qlik Developer / Qlik Analyst (CONTRACT)
£500 – £550 PER DAY (INSIDE IR35)
6 MONTHS
HYBRID – LONDON (UP TO 3 DAYS PER WEEK IN OFFICE)
Are you confident creating impactful dashboards and delivering clear visual insights with Qlik? A major UK-based company is seeking a talented and commercially-minded individual to support their migration to Qlik Cloud and help drive analytics through agile stakeholder collaboration and creation of dasshboards.
THE COMPANY:
This leading organisation is well-established in the UK market and plays a vital role in the telecoms and digital infrastructure sector. The team works in sprints to deliver high-value data solutions across the business.
THE ROLE:
This role will support a high-profile Qlik migration to Qlik Cloud while responding to an ongoing stream of stakeholder requests. You’ll be delivering insights in an agile way and creating dashboards that make an impact.
Specific duties as a Qlik Developer include:
-
Supporting the migration of existing reports and dashboards to Qlik Cloud
-
Responding to stakeholder requests in sprints and prioritising delivery accordingly
-
Building and optimising dashboards from scratch in Qlik based on business needs
-
Communicating insights clearly to both technical and non-technical stakeholders
YOUR SKILLS AND EXPERIENCE:
To succeed in this role, you will need:
-
Strong commercial experience developing dashboards with Qlik (Qlik Sense ideally)
-
Deep knowledge of SQL and strong hands-on experience querying databases
-
Excellent communication skills with a commercial, stakeholder-focused mindset
-
Ideally, experience with GCP or another cloud platform (AWS, Azure etc.)
THE BENEFITS:
This contract offers £500 – £550 per day (Inside IR35) for an initial 6-month period, with the opportunity to work on-site in London up to 3 days per week and remote otherwise.
HOW TO APPLY:
Register your interest by clicking the apply link on this page or emailing with your latest CV and a short summary of why you’re a strong fit for the role.
UK-based candidates only.
To Apply for this Job Click Here

Data Analyst
London
£375 - £425
+ Data Engineering
ContractLondon
To Apply for this Job Click Here
Data Analyst (Data Wrangler, SQL, Python)
Location: Primarily remote (occasional collaboration days in London)
Contract: Until end December 2025 (strong possibility of extension)
Day Rate: £375-£425 (IR35, TBC)
About the Role
Join a specialist team within a leading financial services advisory consultancy, working on a high-profile, confidential investigation. This role is heavily focused on extracting, wrangling and preparing extremely large datasets to support complex forensic analysis and reporting.
Responsibilities
-
Perform extensive data wrangling to clean, structure and prepare large datasets from multiple sources.
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Use SQL and Python (Pandas) to transform and load data into analytics environments.
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Conduct thorough quality checks, spotting inconsistencies or issues proactively.
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Support senior consultants by ensuring data is ready for robust comparative analysis and final reporting.
Why This Role Stands Out
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Consultancy experience is absolutely critical – candidates must come from a Big Four or equivalent consultancy environment. This ensures the ability to operate in fast-paced, multi-stakeholder projects, with a rigorous approach to quality and delivery.
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A forensic, investigative mindset is equally essential. This work involves dissecting sensitive datasets to identify discrepancies and support complex conclusions, far beyond typical data analyst or BI dashboard work.
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Requires expert-level SQL and Python (Pandas) skills to handle hundreds of millions to billions of rows across diverse data sources.
Key Requirements
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3-5 years’ data-focused experience in professional services or consulting environments.
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Proven track record in a Big Four or similar consultancy, delivering on complex, high-pressure projects.
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Advanced SQL for building, optimising and troubleshooting queries on very large static datasets.
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Expert Python scripting, with deep use of Pandas for data manipulation.
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Strong experience handling multiple data formats: Oracle databases, text files, XML.
-
UK-based, with flexibility for occasional days in the London office.
Desirable
-
Experience with financial crime, regulatory or other forensic investigations.
-
Data visualisation skills to help present findings clearly.
Quick Experience Checklist
3-5 years in data-focused roles
Consultancy / Big Four background (mandatory)
Expert SQL & Python (Pandas)
Forensic, investigative approach to data
Comfortable with extremely large datasets
UK-based, willing to attend occasional London collaboration days
To Apply for this Job Click Here

Data Engineer
City of London
£600 - £650
+ Data Engineering
ContractCity of London, London
To Apply for this Job Click Here
DATA ENGINEER – INVESTMENT FIRM
6-MONTH CONTRACT
£600 PER DAY INSIDE IR35
HYBRID
ABOUT THE COMPANY
A rapidly growing investment firm headquartered in London, which has doubled its team over the past 2.5 years and continues to attract strong investor backing. With 230+ employees and ongoing expansion, the company is now focused on becoming more AI- and data-enabled, modernising its infrastructure to support more advanced analytics and automation.
THE TEAM
You’ll join a skilled and collaborative analytics team of eight, working closely with senior leadership. The team has already laid the foundations for a modern data platform using Azure and Databricks and is now focused on building out scalable ETL processes, integrating AI tools, and delivering bespoke analytics solutions across the organisation.
THE ROLE
As a Data Engineer, you’ll play a pivotal role in designing and implementing robust data pipelines, supporting the migration from legacy Azure systems to Databricks, and working closely with stakeholders to deliver tailored data solutions. This role combines hands-on development with collaborative architecture design, and offers the opportunity to contribute to AI readiness within a fast-paced business.
KEY RESPONSIBILITIES
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Develop and maintain ETL pipelines, including manual and semi-manual data loads
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Connect and integrate diverse data sources across cloud platforms
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Collaborate with analytics and design teams to create bespoke, scalable data solutions
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Support data migration efforts from Azure to Databricks
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Use Terraform to manage and deploy cloud infrastructure
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Build robust data workflows in Python (e.g., pandas, PySpark)
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Ensure the platform is scalable, efficient, and ready for future AI use cases
REQUIRED SKILLS & EXPERIENCE
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Strong experience with Azure and Databricks environments
-
Advanced Python skills for data engineering (pandas, PySpark)
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Proficiency in designing and maintaining ETL pipelines
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Experience with Terraform for infrastructure automation
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Track record of working on cloud migration projects, especially Azure to Databricks
-
Comfortable working onsite in London 2 days/week and engaging cross-functionally
-
Strong communication and problem-solving abilities
NICE TO HAVES
-
Experience with Qlik or other data visualisation tools
-
Exposure to AI product integration or readiness projects
To Apply for this Job Click Here

Senior Data Wrangler / Engineer (Financial Services)
London
£300 - £400
+ Data Engineering
ContractLondon
To Apply for this Job Click Here
SENIOR DATA ENGINEER / DATA WRANGLER – (FINANCIAL SERVICES)
6-MONTH CONTRACT
£400 PER DAY (INSIDE IR35)
ASAP START
THE COMPANY
Join a prestigious financial services consultancy supporting top-tier clients on sensitive, high-impact forensic data analytics projects. Operating under strict NDAs, the firm tackles complex financial investigations involving billions of records from multiple sources. You’ll be part of a dynamic team transforming raw data into actionable insights for reporting and compliance.
THE ROLE
As a Senior Data Engineer / Data Wrangler, you will lead the organization, transformation, and validation of massive financial datasets (Oracle, SQL, XML, CSV, text). Your focus will be on data lineage, comparative analysis, and forensic data engineering to ensure data accuracy and usability. You’ll collaborate closely with stakeholders through frequent stand-ups and continuous monitoring, driving data quality in an intense, fast-paced environment.
Key responsibilities:
-
Wrangle, format, and organize large financial data sets for reporting and analysis
-
Develop and maintain Python scripts (using pandas) for forensic data processing
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Write and optimize SQL (T-SQL and Oracle) for data extraction and validation
-
Perform comparative and lineage analysis to identify data inconsistencies
-
Initially able to work onsite regularly with flexibility, particularly during early stages of the contract
KEY SKILLS & REQUIREMENTS
-
3-5 years minimum in data engineering or forensic analytics
-
Very strong SQL skills, including T-SQL and Oracle
-
Proficient in Python scripting with pandas
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Experience working with large financial data sets and complex formats
-
Background in financial services consultancy or investigative firms (e.g., EY, PwC, Deloitte, Goldman Sachs) highly desirable
-
Ability to work onsite regularly and commit fully to project timelines
DESIRABLE
-
Experience handling sensitive financial data under NDA
-
Comfortable working in on-premise environments
-
Forensic data analysis experience
This is an excellent opportunity to work on a high-profile project with leading financial clients, delivering critical insights through expert data wrangling and engineering.
To Apply for this Job Click Here

Data Wrangler
London
£350 - £400
+ Data Engineering
ContractLondon
To Apply for this Job Click Here
DATA WRANGLER
6-MONTHS
£400 PER DAY – INSIDE IR35
HYBRID – LONDON
This is an exciting opportunity for a highly analytical and detail-driven Data Wrangler to support a major forensic data analytics project. You’ll be working with a specialist team to ingest, clean, and compare massive datasets from multiple complex systems – some sources containing hundreds of millions of records. The ideal candidate will thrive in ambiguity, work independently, and apply a forensic lens to messy, unstructured operational data.
THE COMPANY
You’ll be working with a globally recognised advisory firm, known for its work in forensic investigations, compliance, and financial disputes. This team operates in a highly confidential environment, supporting projects with national-level visibility. You’ll be joining a collaborative, focused, and expert-led group engaged on a high-stakes piece of work.
THE ROLE
You’ll play a hands-on role working with data received from external clients-often incomplete, inconsistent, or raw. Your job is to wrangle that data into usable form, run forensic-level comparisons, and support reporting back to clients. You’ll work in a secure VDI environment and must be comfortable navigating complex and sensitive data.
Key responsibilities include:
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Ingesting and transforming large datasets (100M+ rows), from Oracle, SQL Server, and flat files (CSV, XML).
-
Writing and reviewing SQL and Python (Pandas) scripts to clean and join data across multiple sources.
-
Conducting forensic comparisons between data sources (e.g., matching millions of XML records to transactional logs).
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Supporting peer code reviews to ensure high quality and reduce rework.
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Working within a locked-down environment using tools like VS Code, SQL clients, and secure remote desktop environments.
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Collaborating with data consultants and forensic analysts to troubleshoot logic and ensure audit-quality outputs.
KEY SKILLS & REQUIREMENTS
-
Strong SQL (T-SQL, Oracle, or PostgreSQL) – must be comfortable with complex joins and large volumes
-
Python with Pandas – mandatory for data transformation and wrangling
-
Experience working with large operational databases, text files, and legacy data sources
-
Strong attention to detail and a forensic mindset – ability to spot inconsistencies, gaps, and unusual data behaviour
-
Prior experience in a regulated, sensitive, or secure data environment is a big plus
-
Previous work in or alongside large consultancy firms
HOW TO APPLY
Please register your interest by sending your CV via the apply link.
To Apply for this Job Click Here

CRM Executive
London
£150 - £160
+ Advanced Analytics & Marketing Insights
ContractLondon
To Apply for this Job Click Here
Job Title: CRM Executive
Location: Westfield Shepherd’s Bush (Hybrid – 3-4 days in the office)
Contract Duration: 7 Months
Rate: Up to £150 per day (Outside IR35)
About the Company:
Our client is a leading retailer with a flagship presence in Shepherd’s Bush. They are looking for a creative and driven content marketing focussed CRM Executive to join their marketing team on a short-term contract.
The Role:
You will be responsible for creating, curating, and managing engaging content across various digital platforms. You will play a key role in driving brand awareness, supporting campaigns, and enhancing the company’s online presence.
Key Responsibilities:
- Calendar planning
- Briefing in copy, creative and product nominations
- Supporting with planning tests and personalisation
- Approving proofs for campaigns
Key Requirements:
- Experience in a Marketing or CRM role.
- Basic understanding of CRM and digital marketing best practices.
- A creative mindset and the ability to work autonomously and in a fast-paced environment.
To Apply for this Job Click Here

Digital Designer
City of London
£200 - £245
+ Digital Analytics
ContractCity of London, London
To Apply for this Job Click Here
Digital Designer – Contract
Retail Brand
£225-£245 per day – Outside IR35
1 day per week in London office preferred
We’re working with a high street retailer who are looking to bring in a Digital Designer to support their in-house team on a 4-month contract basis. This is a BAU focused role, covering homepage, app and email design.
Role and responsibilities
-
Contribute to creative discussions and help refine visual output where needed
-
Collaborate with internal creative and marketing teams to maintain brand consistency
-
Work within existing brand guidelines to create engaging digital content
-
Design and deliver assets for homepage, mobile app, and email marketing
-
Support day-to-day BAU digital design activity across key customer touchpoints
-
Manage multiple briefs and deadlines in a fast-paced environment
Skills and Experience
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Strong visual design skills and an eye for layout, typography, and detail
-
Proficiency in Adobe Creative Suite (Photoshop, Illustrator, etc.)
-
Experience designing for web, mobile apps, and email
-
Proven experience as a Digital Designer, ideally within retail or eCommerce
-
Comfortable working independently and managing competing priorities
-
Figma experience is not required
To Apply for this Job Click Here

Data Science Manager
London
£550 - £600
+ Data Science & AI
ContractLondon
To Apply for this Job Click Here
Data Science Manager (Contract)
£500-£600/day | ⏳ 3 months (IR35 TBC) | 2 days/week in office
About the role
Our client is looking for a hands-on Data Science Manager to take full ownership of their pricing optimisation function. This is a 3-month contract leading a small international team, focused on refining and deploying pricing models that directly impact trading performance across multiple markets.
You’ll be managing everything from strategy to code, balancing high-level pricing approaches with deep technical involvement in building, testing, and improving algorithms.
Key responsibilities:
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Own the end-to-end pricing product: develop, improve, and deploy pricing models tailored to market and product dynamics
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Drive experimentation and A/B testing to validate pricing strategies
-
Collaborate closely with commercial teams to ensure models align with trading goals
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Work with data engineering teams to maintain robust pipelines and smooth deployments
Tech stack:
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Python (must-have)
-
GCP
-
Tableau
About you:
-
Background in pricing optimisation.
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Comfortable leading a team but still very hands-on – coding, analysing, and iterating
-
Excellent communicator who can simplify technical work for commercial stakeholders
-
Past titles likely include Lead Data Scientist, Head of Data Science, or similar
To Apply for this Job Click Here

Full Stack AI Engineer/ Computer Vision Engineer
London
£450 - £500
+ Computer Vision
ContractLondon
To Apply for this Job Click Here
Full Stack AI Engineer/ Computer Vision Engineer
Initial 4-5 month contract
£500 a day – Outside IR35
Key Skills:
- 3D meshing
- creating segmentation maps
- LLMs – prompt engineering, some RAG and live engineering for meeting insight from text
- Rotating in the 3D world
Nice to have:
- Working with YOLO models
- Experience working with immersive virtual events
- Segmentation map
To Apply for this Job Click Here

Digital Designer – Contract
London
£225 - £245
+ Digital Analytics
ContractLondon
To Apply for this Job Click Here
Digital Designer – Contract
Retail Brand
£225-£245 per day – Outside IR35
Remote (1 day per week in London office preferred)
We’re working with a high street retailer who are looking to bring in a Digital Designer to support their in-house team on a 4-month contract basis.
This is a BAU focused role, covering homepage, app and email design. You’ll be stepping in to help manage the day-to-day creative output, working closely with their internal teams to ensure high-quality digital design delivery.
Role & Responsibilities:
- Support day-to-day BAU digital design activity across key customer touchpoints
- Design and deliver assets for homepage, mobile app, and email marketing
- Collaborate with internal creative and marketing teams to maintain brand consistency
- Work within existing brand guidelines to create engaging digital content
- Manage multiple briefs and deadlines in a fast-paced environment
- Contribute to creative discussions and help refine visual output where needed
Skills & Experience:
- Proven experience as a Digital Designer, ideally within retail or eCommerce
- Proficiency in Adobe Creative Suite (Photoshop, Illustrator, etc.)
- Experience designing for web, mobile apps, and email
- Strong visual design skills and an eye for layout, typography, and detail
- Comfortable working independently and managing competing priorities
- Figma experience is not required
Benefits
£225-£245 per day outside IR35, 4 month contract, London (hybrid)
How to Apply
Register your interest by sending your CV to Lloyd Dunstall via the Apply link on this page
Digital Designer / Digital Design / Adobe Creative Suite / Visual Design