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Senior Machine Learning Engineer

New York, New York

$190,000-210,000 base salary + bonus + benefits

Harnham is partnered with a well-known financial services company that is disrupting a key area of financial services. They are building out a proprietary LLM platform that will revolutionize how certain financial tasks are carried out in the cloud. This will be a senior-level ML Engineer in the business and lead all LLM projects from end-to-end.

THE ROLE

• You will be responsible for end-to-end machine learning model development and deployment for the company’s AI platform
• You will report directly to senior leadership and work closely on technical direction
• Own development of new PoCs and quickly build into production, particularly focusing on novel NLP and LLM applications
• You will implement and design code and build out to production using various machine learning and LLM techniques, owning machine learning infrastructure
• You will play an integral role of building out the AI team and scaling out its product
• Act as a thought leader role for AI across the business

YOUR SKILLS AND EXPERIENCE

The successful Senior Machine Learning Engineer will likely have the following skills and experience:

• 3-5 years of commercial experience (depending on education level) preferred with a focus on building and deploying natural language and LLM models
• Experience working in a fast-moving organization is preferred
• Expertise in Python (TensorFlow, PyTorch) for production-grade work
• Commercial experience building novel NLP and LLM AI platforms with large datasets
• Cloud experience in AWS, Azure or GCP preferred
• History of working on models from concept to production / end-to-end / 0-1
• Experience in settings wearing multiple hats
• Domain experience in financial services, investment or private equity a plus
• History of partnering with non-technical stakeholders required
• Experience as a player/coach or manager for AI teams preferred
• PhD or MS degree in Computer Science, Statistics, Applied Mathematics, Computer Engineering or similar

THE BENEFITS

A competitive base salary of $190,000-210,000 + benefits + equity

HOW TO APPLY

Please register your interest by sending your résumé to Tim Jonas via the Apply link on this page.

KEYWORDS

Machine Learning | AI | Artificial Intelligence | Technology | Fintech | Financial Services | Fortune 500 | Deployment | Production | LLMs | LLM | Large Language Models | GenAI | Gen AI | Generative AI | NLP | NLU | NLG | Natural Language Processing | Infrastructure | Architecture

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PRINCIPAL DATA SCIENTIST – GENERATIVE AI SYSTEMS

$200K-$235K BASE SALARY + BENEFITS

REMOTE ROLE – U.S. BASED

Are you looking to design and deploy next-generation Generative AI systems that power real products at scale?

THE COMPANY

This global learning technology leader is transforming how students and educators interact with digital content through advanced AI and data-driven innovation. They’re expanding their data science organization to accelerate AI strategy and build intelligent systems that improve both customer-facing experiences and internal operations.

THE ROLE

As a Principal Data Scientist, you’ll serve as a senior individual contributor driving end-to-end development of production-ready Generative AI systems. You’ll lead the architecture and implementation of Retrieval-Augmented Generation (RAG) and multi-agent frameworks, partnering closely with engineering to bring prototypes into production.

KEY RESPONSIBILITIES

• Designing, prototyping, and deploying scalable GenAI systems that generate and synthesize content.
• Architecting orchestration pipelines across varied data assets.
• Owning AI solution design and influencing technical direction across product teams.
• Collaborating with cross-functional partners to define strategy and ensure production excellence.
• Operating independently in a high-trust, innovation-driven environment.

YOUR SKILLS AND EXPERIENCE

• Proven experience building and deploying production-grade Generative AI systems (RAG, orchestration, or multi-agent)
• Strong hands-on Python development skills
• Experience with LangChain / LangGraph in production environments
• Cloud experience (AWS or Azure)
• PhD preferred, with 5+ years of post-PhD industry experience

THE BENEFITS

• $200K-$235K base salary (depending on experience and technical depth)
• Fully remote role within the U.S.
• Opportunity to define AI architecture and shape product strategy at an enterprise scale

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Job Title: Product Engineer
Location: Remote
Salary: £72,000 – £110,000 + stock options

I’m working with a fast-growing SaaS scale-up software organisation.

They’re looking for a Principal Product Engineer who thrives in a collaborative, product-focused environment. You’ll be part of a cross-functional squad (PM, designer, engineers, data) and involved throughout the product lifecycle – from ideation to release.

Tech Stack

• Frontend: React (core), Storybook, some legacy Marionette (Backbone.js).
• Backend: Ruby on Rails (relative flex on this).
• Infrastructure: AWS (serverless functions with Lambda, cloud hosting)..

Interview Process

1. Tech + product chat (30m): exploration of experience and product mindset.
2. Coding exercise (1h15m): React-based technical task.
3. Product engineering exercise (1h): problem-solving + approach to building.
4. Values interview with founders (1h).

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Role: Azure Senior Data Engineer

Location: Manchester, Lancashire

Hybrid working: go into office 1x day a week

Salary: £60,000 – £70,000 (dependent on experience)

Insight into the Company:

A large retail organisation – market leaders in their industry – are looking for a Senior Data Engineer to enter their team. You will be working in a small team of 3 (including you!) and they are looking to build up the team over the next year.

The ideal candidate will have experience with managing data warehouses from start to finish and liaise with IT teams regularly. The role will involve stakeholder management, working with diverse roles, such as software engineers, sales and marketing professionals and more. Therefore, communicating your projects needs and understanding others is an essential part of this role.

Role and Responsibilities:

• You will design, build and upgrade data pipelines
• You will work in CI/CD and with Software/ DevOps teams in the organisation
• You will have expertise in azure – from collecting, to transforming to loading!

Skills and Experience:

• Essential to have experience with:
  • Azure
  • SQL
  • Regular stakeholder management
  • Data warehouse management
  • Power BI
• Desirable to have experience with:
  • Bachelors in STEM subject – ideally computer science or engineering
  • CI/CD methods

Interview Process:

• There are 3 stages to the process:

1. Introductory conversation with the Head of Business Insights
2. In person interview, focussing on techstacks
3. Sign off conversation!

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Backend Engineer (Python/Django)

Hybrid (Sheffield) – £60,000

We are working with a high-growth fintech scale-up who are looking to bring on a Backend Engineer into their growing data team. They are innovating rapidly and looking for top engineering talent to support their next phase of growth.

As a Backend Engineer, you’ll play a key role in building and scaling the company’s core payment infrastructure.

Responsibilities

• Design, build, and maintain scalable backend services and APIs
• Write production-quality Python and Django code with a focus on performance and maintainability
• Work with the Django ORM at a deep level to ensure efficient data operations
• Collaborate in agile sprints with product and engineering teams
• Debug, diagnose, and resolve issues across the platform
• Contribute to backend infrastructure, deployment pipelines, and monitoring/logging
• Mentor junior engineers and promote best practices

Tech Stack

Essential:

• Python
• Django (ORM)
• Broader backend experience
• SQL expertise
• Familiarity with CI/CD and scalable systems

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Senior DevOps Engineer

Hybrid – 3 Days Onsite

Salary: up to £85,000

This established company is looking to hire a DevOps professional with a passion for automation and infrastructure-as-code.

The Opportunity

You’ll play a key part in:

• Designing and owning CI/CD pipelines using GitHub Actions
• Automating infrastructure using Terraform
• Managing deployment flows from development through to production
• Collaborating with technical teams to ensure smooth platform rollouts
• Supporting new initiatives including a self-serve data sandbox and a planned AI platform

This is a newly created position – ideal for someone who thrives in environments where they can shape the role, build processes from scratch, and operate with autonomy.

You’ll Bring

• Proven experience deploying code to production in a cloud or data platform environment
• Strong hands-on knowledge of:
• GitHub / GitHub Actions
• Terraform
• Solid understanding of CI/CD pipelines and infrastructure-as-code
• Ability to work across dev, test, and production environments
• Confidence working in a cross-functional team (architects, BI, data engineers)

Nice to have (but not essential):

• Exposure to BI tools such as Power BI
• Experience in data-heavy environments (analytics, reporting platforms, etc.)

If you’re a Senior DevOps Engineer or Infrastructure Specialist looking to apply your skills in a meaningful, fast-evolving environment, this could be a great opportunity!

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SENIOR DEVOPS ENGINEER

£85,000 + BONUS

EUSTON (Hybrid)

Looking for a role where you can own cloud BI deployments, shape best practices, and be the go-to person for automation and infrastructure in a growing data function?

THE COMPANY:

I’m working with a major multinational organisation in the gaming and entertainment sector, with operations across several European markets. They’re a household name in the UK, running large-scale, consumer-facing products and campaigns, and they reinvest millions each week into community, heritage, and sporting initiatives. With ambitious growth plans, they’re building out their central BI and Data capabilities – and this is a newly created role to help them get there.

THE ROLE:

This is a hands-on role where you’ll sit at the heart of BI, architecture, and engineering, owning deployment and infrastructure processes as the team’s first dedicated BI Cloud Specialist.

• Manage deployments from dev to test to production using GitHub Actions and Terraform
• Design and build automated infrastructure-as-code solutions
• Take ownership of deployment pipelines within the BI team
• Support the rollout of a new self-service data platform for business users
• Play a key role in future projects such as developing an AI platform
• Act as the subject matter expert for infrastructure automation and deployment best practice

YOUR SKILLS AND EXPERIENCE:

A successful BI Cloud Specialist will have the following:

• Hands-on experience with GitHub Actions and Terraform (essential)
• Background in DevOps, BI deployment, or cloud infrastructure
• Strong understanding of automated deployments and infrastructure as code
• Power BI knowledge (desirable but not essential)
• Experience delivering production-ready deployment pipelines
• Senior DevOps Engineer profile rather than project manager/oversight only

THE BENEFITS:

You will receive a competitive salary up to £85,000 + alongside company benefits and the opportunity to establish and grow a brand-new capability within the BI team.

HOW TO APPLY:

Please register your interest by sending your CV to Molly Bird via the apply link on this page.

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GROWTH & ACQUISITION MANAGER

UP TO £55,000
EDINBURGH – 3X A WEEK IN OFFICE

*Please note, you must live within an hour commuting distance to Edinburgh and have full UK right to work*

ABOUT THE BUSINESS

A fast-growing UK e-commerce brand in the ready-meals space, specialising in high-quality ambient meals designed for convenience and long shelf-life. With nationwide next-day delivery, the business is rebranding and scaling, targeting a customer base that values ease, independence, and reliable service.

THE TEAM

You’ll join a small but agile Marketing team, reporting into the Head of Brand and working closely with the Brand Manager (retention) and Product Manager. This is a hands-on environment where collaboration is key – campaigns move quickly from ideation through to execution and measurement.

At this level, you’ll be the growth specialist in the team, trusted to shape and deliver the acquisition strategy end-to-end while leveraging support from agencies and colleagues where needed.

THE ROLE

This is a brand-new position with a clear focus: driving new customer acquisition and converting them into loyal, repeat purchasers. You’ll be responsible for developing and delivering integrated growth campaigns across both online and offline channels, while managing significant budgets and optimising performance at every stage of the funnel.

Key responsibilities include:

• Designing and executing multi-channel growth and acquisition strategies (digital + offline)
• Developing campaign messaging, activation, and end-to-end delivery
• Managing and optimising customer acquisition journeys and conversion funnels
• Overseeing significant marketing budgets (£1M+) and ensuring ROI
• Working cross-functionally with product, brand, and external agencies to deliver impact
• Contributing to CRM development and lifecycle marketing as the function expands

SKILLS & EXPERIENCE REQUIRED

• Hands-on experience in growth and acquisition, ideally within e-commerce, FMCG, or food
• Proven track record managing £1M+ marketing budgets
• Experience across both digital and offline acquisition channels (e.g. social, search, TV, radio, press, direct mail)
• Strong data-driven mindset with ability to analyse, test, and optimise campaigns
• Strategic thinker who is also comfortable being hands-on
• Experience working in-house within a fast-growing £10M+ brand
• Excellent communication and stakeholder management skills
• Edinburgh-based (or able to relocate within an hour’s commute)

Nice to have:

• Exposure to CRM buildouts and lifecycle marketing (Mailchimp or similar)
• Experience with consumer subscription models
• Familiarity with analytics tools (Google Analytics, Looker)
• Understanding of older adult consumer demographics

WHY APPLY?

• Play a pivotal role in shaping the growth strategy of a fast-scaling e-commerce brand
• Lead significant acquisition projects with both online and offline reach
• Hybrid working in modern offices in central Edinburgh
• Collaborate with a close-knit, hands-on team while driving big-budget campaigns
• Opportunity to make a visible impact on customer growth and retention strategy

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DATA ANALYST

UP TO £46,000
HYBRID – 3X A WEEK IN LONDON

ABOUT THE BUSINESS
A leading UK media organisation with a portfolio that spans newspapers, digital platforms, radio, and television. Its brands include some of the most widely read and influential publications in the country. It focuses on entertainment, sport, news, and reader promotions, reaching millions across both print and digital.

THE TEAM
You’ll be joining the Analytics team dedicated to a particular newspaper, reporting into the Head of Analytics and working alongside a group of experienced senior analysts. The team partners with a wide range of stakeholders across Marketing, CRM, Promotions, UX, and more.

At this level, you’ll be trusted to manage your own projects end-to-end, from scoping requirements to delivering insights, while receiving guidance and support where needed.

THE ROLE
This is a varied analytics position with exposure to multiple parts of the business. You’ll work on projects such as analysing promotional campaigns (e.g. holiday offers, codes, ticketing), driving customer registrations, and supporting the rollout of new digital initiatives like premium subscriptions.

Key responsibilities include:

• Running analysis on large, complex datasets (including third-party promotional data)
• Supporting registration and audience growth initiatives with robust analytics
• Building dashboards and reports to track KPIs for different business areas
• Partnering with Marketing, CRM, and Promotions teams to deliver actionable insights
• Contributing to experimentation and A/B testing projects as this capability expands

SKILLS & EXPERIENCE REQUIRED

• Strong SQL skills (BigQuery experience highly desirable)
• Experience in analytics, ideally within customer, marketing, or media environments
• Exposure to data visualisation tools (Tableau preferred, but flexible on others)
• Proven ability to manage projects independently in a fast-paced environment
• Excellent stakeholder management and communication skills

WHY APPLY?

• Play a central role in shaping analytics for one of the UK’s most recognised media brands
• Hybrid working with modern offices in central London
• Exposure to a wide variety of projects and stakeholders across the business
• Opportunity to influence major initiatives like user registration, subscriptions, and promotions

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LEAD MARKETING ANALYST

UP TO £90,000

FULLY REMOTE – MUST BE UK BASED

THE COMPANY

A leading gaming studio, undergoing major transformation following private equity backing and the appointment of a new CEO are now looking for a Lead Analyst to take them to the next level!

THE ROLE

As Lead Marketing Analyst, you will:

• Take full ownership of marketing analytics across the business.
• Line manage one Senior Analyst while acting as the senior layer of expertise in the team.
• Drive projects around LTV modelling, attribution, and subscription analytics.
• Analyse and optimise the entire marketing funnel to support acquisition and retention.
• Deliver insights that directly influence commercial and marketing strategy.
• Work closely with the CMO, presenting to the board and SLT, and communicating insights to both technical and non-technical audiences.

YOUR SKILLS AND EXPERIENCE

• Proven experience in marketing analytics, ideally within gaming, e-commerce, adtech, or other B2C businesses.
• Strong SQL skills essential.
• Proficiency with data visualisation tools (Power BI, Looker).
• Familiarity with Snowflake desirable.
• Experience in modelling (LTV, attribution) highly valuable.
• Strong stakeholder management and communication skills
• Line management experience a plus, though not essential.

BENEFITS

• Remote-first business
• Opportunity to lead the marketing analytics function during a key growth phase.
• High visibility role with direct impact on commercial strategy.
• Competitive salary, bonus, and benefits

HOW TO APPLY

Express your interest by sending your CV via the apply link on this page

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DIGITAL ANALYTICS MANAGER – 12-MONTH FTC
UP TO £70,000 + BENEFITS
WATFORD – HYBRID, 2 DAYS A WEEK

Please note, sponsorship is not available. Applicants must be UK residents.

Company

A global retail powerhouse with thousands of stores across 9 countries is looking for a Digital Analytics Manager to join its European team. The business continues to invest heavily in digital innovation, with recent app launches and ecommerce expansion shaping its next phase of growth. This is a chance to play a pivotal role in understanding customer journeys across web and app, driving insights that directly impact business performance.

The Role

This is a hands-on analytics role where you’ll own digital data and insights across multiple European markets, with a strong focus on the UK, Germany, and Austria. Sitting within the digital team, you’ll manage the flow of GA4 and BigQuery data, build impactful reports, and partner with internal stakeholders and a third-party analytics provider.

From measuring app performance to understanding the impact of promotions and website changes, you’ll play a central role in connecting digital data with business outcomes. You’ll also have the opportunity to influence future app launches and regional strategies, ensuring the right data is captured and optimised for decision-making.

Key Responsibilities

• Own and manage GA4 data and reporting across web and app platforms.
• Partner with customer analytics, trade, and content teams to deliver insights.
• Oversee the relationship with a third-party analytics provider.
• Analyse app and web performance, identifying regional trends and customer behaviour.
• Evaluate the impact of campaigns, promotions, and seasonal activity (e.g., click-and-collect offers).
• Investigate the business impact of website issues or incorrect tag management.
• Provide clear, actionable recommendations to drive customer engagement and business growth.

Role Requirements

Must-haves:

• Strong expertise in GA4 and BigQuery.
• Proven experience delivering digital analytics in a large-scale retail or ecommerce environment.
• Ability to translate data into actionable insights for senior stakeholders.
• Credible, engaging communicator with a proactive, problem-solving approach.

• Experience with BI tools (e.g., Looker).
• Background in experimentation or A/B testing.
• Self-starter mindset, with the ability to anticipate challenges and identify solutions early.

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MARKETING PERFORMANCE MANAGER – PPC & SEO

£55,000 – £65,000 DOE
BRISTOL – FULL-TIME, 5 DAYS A WEEK IN OFFICE

Please note, you must live within a commutable distance to Bristol and have full UK right to work

ABOUT THE BUSINESS

A fast-growing service and investment group that supports brands across insurance, finance, property, and banking. The group provides centralised services in marketing, IT, compliance, HR, and finance, enabling its portfolio of businesses to scale quickly and effectively.

With a dynamic and acquisitive strategy, the business has a strong pipeline of new brands and acquisitions. This is a fast-paced environment where ambitious marketers can have a direct impact on group-wide strategy and performance.

THE TEAM

You’ll join a central Marketing function that works across multiple portfolio brands. The team includes in-house specialists in brand, design, and social, as well as external agencies and freelancers. Collaboration is key, and you’ll have the opportunity to shape campaigns from planning through to delivery and reporting.

At this level, you’ll be trusted as the performance marketing lead – balancing hands-on execution with strategic input and the potential to expand your remit across more brands as the role grows.

THE ROLE

This is a hands-on Marketing Manager position, ideal for someone with an agency background who is confident running multiple projects and delivering measurable results. Initially, your focus will be on managing performance for one brand, with scope to expand across the wider portfolio.

Key responsibilities include:

• Campaign Execution & Performance
• Plan and run SEO campaigns (keyword research, content planning, technical audits, performance monitoring).
• Manage PPC campaigns across Google, Bing, and LinkedIn – including budget setting, ad creation, optimisation, and reporting.
• Develop integrated campaigns spanning digital, social, email, and content.
• Monitor performance through tools such as Google Analytics, Tag Manager, and Data Studio.
• Brand & Creative Collaboration
• Work closely with in-house specialists (design, social, brand) to deliver high-quality campaigns.
• Provide creative input and contribute to brand positioning and strategy.
• Bring new ideas and energy to how brands show up in the market.
• Project & Stakeholder Management
• Manage relationships with external agencies and freelancers (SEO, PPC, PR, design, development).
• Support final stages of a new website build, launch, and optimisation.
• Balance in-house vs outsourced work, recommending best approaches.
• Present campaign outcomes and growth opportunities to senior stakeholders.
• Growth & Development
• Opportunity to take ownership of additional brands as the role evolves.
• Clear progression pathway towards a senior leadership/Head of Marketing position as the group expands.
• Exposure to varied sectors including insurance, finance, property, and fintech.

SKILLS & EXPERIENCE REQUIRED

• Strong agency background with proven results in performance marketing.
• Hands-on expertise in both SEO and PPC.
• Confident managing multiple campaigns, stakeholders, and competing priorities.
• Data-driven mindset with the ability to analyse performance and generate actionable insights.
• Creative thinker who can bring fresh ideas to campaigns and brand positioning.
• Strong collaborator, comfortable working with both in-house teams and external suppliers.
• Flexible on years of experience – track record and impact are more important.

WHY APPLY?

• Play a pivotal role in shaping the performance marketing strategy for a multi-brand group.
• Take ownership of campaigns across PPC, SEO, and wider digital activity.
• Opportunity to grow into a Head of Marketing role as the group expands.
• Work across diverse industries with exposure to insurance, property, finance, and fintech.
• Join a dynamic, acquisitive business with ambitious growth plans.

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