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Senior Full Stack Engineer (Patient App / Care Platform)

Cambridge, MA (Kendall Square) – 3 days/week onsite

$160,000 – 180,000 Base + Equity

THE COMPANY

Harnham is partnering with an early-stage, AI-driven healthcare company focused on transforming oncology care through advanced technology. This company is building a biomedically individualized platform aimed not only at early cancer detection, but also at improving patient outcomes through better long-term survivorship care.

Their platform integrates EMR data, AI-driven insights, and patient-facing applications into a unified care delivery system. This allows healthcare providers to better manage care while empowering patients with interactive tools for their recovery and long-term health journey.

With strong funding (~$30M+ raised) and a rapidly growing engineering team, this is an opportunity to join at a critical stage and help shape both the product and technical architecture.

RESPONSIBILITIES

• Build and scale patient-facing applications across web and mobile platforms.
• Develop backend services to support patient workflows, care coordination, and clinical integrations.
• Design and implement frontend components for engaging and interactive patient experiences.
• Integrate structured and unstructured medical data into application workflows.
• Build and maintain systems that interface with EMR platforms and clinical data systems.
• Implement AI-enabled features, including integrations with LLM APIs and intelligent workflows.
• Own end-to-end delivery of large product features from design through deployment.
• Collaborate closely with product, clinical, and engineering teams to deliver impactful solutions.
• Contribute to system architecture decisions across frontend and backend systems.

SKILLS AND EXPERIENCE

• 5-8 years of experience in full stack software engineering.
• Strong backend development experience using Python and Django.
• Frontend development expertise using React.
• Experience building and shipping large-scale, user-facing product features.
• Strong understanding of APIs, system design, and data integration.
• Experience working in regulated environments such as enterprise SaaS, healthcare, or fintech.
• Ability to work independently in a fast-paced, startup environment with high ownership.
• Strong problem-solving skills and ability to deliver scalable, production-ready solutions.

PREFFERED EXPERIENCE

• Experience within healthcare, EMR/EHR integrations, or clinical systems.
• Experience building mobile-first or mobile-enabled applications.
• Familiarity with AI integrations, including LLM APIs (e.g., Claude, Opus).
• Experience working on telehealth or patient-facing applications.
• Exposure to complex data environments involving structured and unstructured datasets.

BENEFITS

The compensation package includes a competitive base salary and early-stage equity, offering strong upside potential within a high-growth startup environment.

HOW TO APPLY

Please submit your CV via the Apply link on this page to register your interest.

KEY TERMS

Fullstack Engineering | Healthcare Technology | Patient Applications | EMR Integration | AI | LLM | Python | Django | React | APIs | Data Integration | Clinical Workflows | Telehealth | Mobile Applications | Startup | Digital Health

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DATA ENGINEER
£45,000
UK

This is a great opportunity to join a growing data team as they scale out a modern cloud-based platform. You’ll gain hands-on experience with Databricks and work closely with experienced engineers in a highly collaborative environment, making it an ideal role for someone early in their career looking to develop quickly.

THE COMPANY

Our client is a well-established professional services organisation with a strong UK presence, currently investing heavily in its data and AI capabilities. They are undergoing a transformation from on-premise systems to a modern Azure Databricks Lakehouse, with strong internal backing and a clear roadmap for growth. This role sits within a scaling team and offers excellent long-term development opportunities.

THE ROLE

• Build and maintain data pipelines within a modern Databricks environment
• Contribute to CI/CD processes and engineering best practices
• Deploy and manage data solutions across the development lifecycle
• Work across multiple squads on varied engineering problems
• Collaborate with data, platform, and ML engineers on new capabilities
• Opportunity to gain exposure to data modelling and machine learning projects

YOUR SKILLS AND EXPERIENCE:

• Experience with Python and PySpark (commercial, academic, or project-based)
• Exposure to Databricks or similar data platforms
• Strong desire to learn and develop within a collaborative team
• Understanding of data engineering fundamentals
• Exposure to cloud platforms (e.g. AWS/Azure) is beneficial
• Knowledge of DevOps practices or CI/CD is advantageous
• Any experience with data modelling is a plus

SALARY AND BENEFITS

• £45,000 base salary (12 Month FTC)
• Pension scheme
• Flexible, remote-first working
• Strong work-life balance culture
• Excellent progression opportunities

HOW TO APPLY

Please register your interest by sending your CV to Harry Lack through the ‘Apply’ link

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Senior Machine Learning Engineer (Applied ML)

About the Company

Our client is a high-scale consumer technology company leveraging machine learning, advanced analytics, and large-scale data systems to optimize user experiences and drive meaningful business impact. Their products reach millions of users globally, providing an opportunity to work on ML systems at significant scale.

The Role

They are hiring a Senior Machine Learning Engineer to own and improve production machine learning models that directly impact key business metrics. This is a highly applied ML role focused on model performance, experimentation, feature engineering, and continuous optimization-not ML infrastructure.

You’ll work with large-scale datasets to improve prediction, ranking, recommendation, and optimization systems, partnering closely with Product, Data, and Engineering teams to deliver measurable outcomes.

What They’re Looking For

• 5+ years of experience in Machine Learning Engineering, Applied ML, or Data Science
• Strong hands-on Python and SQL skills
• Experience building, deploying, and improving production ML models
• Experience working with large-scale datasets
• Strong understanding of feature engineering, model optimization, and experimentation
• Experience with recommendation systems, ranking, personalization, Ad Tech, search, marketplace optimization, or similar large-scale ML problems
• Ability to operate independently, take ownership, and drive technical decisions

Why Join?

• Work on high-impact ML systems serving millions of users
• Own and improve models that directly influence product performance and revenue
• Join a mature engineering environment with strong data infrastructure already in place
• Operate as a senior individual contributor with significant ownership and impact

Location

Remote within the following states: California, Washington, Texas, Arizona, Utah, Nevada, New Jersey, New York, and Oklahoma.

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Head of Strategy and AI (FS)
London (on-site 3 days per week)
£90,000 to £150,000 – dependent on level

This is a senior leadership role at the centre of an organisation-wide shift towards insight-led decision-making and AI-enabled analytics. You will shape how analytics operates as a shared service, influencing strategy while remaining hands-on.

The Company
They are a data-driven organisation undergoing significant transformation across analytics, reporting, and decisioning. With a strong commercial focus, they are investing in modern data platforms, automation, and AI to improve how insight is generated and used. Analytics plays a critical role in supporting growth and executive decision-making.

The Role

• Lead a centralised Analytics and MI function
• Balance strategic leadership with hands-on analytics delivery
• Move the function from reporting to actionable, commercial insight
• Embed AI tools and automation into analytics workflows
• Oversee scalable data, reporting, and governance foundations
• Line manage decisioning capability and oversee platform migration
• Influence senior stakeholders across Finance, Marketing, and leadership teams

Your Skills and Experience

• Strong leadership experience within analytics/strategy functions, ideally within financial services
• Clear examples of developing strategies off the back of data work
• Proven ability to turn data into clear commercial recommendations
• Confidence influencing senior stakeholders, including C-suite
• Hands-on capability with SQL and ideally Python
• Practical exposure to AI tools within analytics environments

What They Offer

• Salary of £90,000 to £150,000
• Bonus
• Private health insurance
• Pension scheme
• 25 days holiday
• High visibility role with significant influence and progression

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The Role

We’re partnering with a fast-growing group undergoing a major CRM and data transformation, and they’re looking for a hands-on CRM Manager to play a key role in shaping how they engage with customers across their network.
This is a unique opportunity to join at a pivotal point – with a new data warehouse in place and Bloomreach being rolled out, you’ll have the platform, backing, and scope to build a more sophisticated, data-driven CRM function from the ground up.
You’ll lead a small team while remaining hands-on, owning the development and execution of lifecycle programmes that directly impact customer experience, retention, and revenue.

What you’ll be doing

• Own and deliver the end-to-end CRM programme, from strategy through to execution
• Lead and develop a team of 2 CRM Executives (growing to 3-4)
• Design and optimise customer lifecycle journeys, including:
  • Onboarding and first purchase
  • Patient recall and retention
  • Repeat purchase and product journeys
• Build and scale multi-channel CRM campaigns across:
  • Email
  • SMS
  • Direct Mail
  • (Future channels such as WhatsApp)
• Play a key role in improving marketing automation maturity using Bloomreach
• Use customer data and insights to optimise performance and drive commercial outcomes
• Work closely with internal stakeholders during an ongoing CRM transformation

What we’re looking for

• Proven experience in a CRM Manager or CRM Lead role
• Experience managing and developing small CRM teams (2-3+ reports)
• Strong hands-on experience building and delivering CRM campaigns and journeys
• Experience across multiple channels (not just email – SMS essential, DM a bonus)
• Background in lifecycle CRM, not just one-off campaigns
• Experience using modern CRM / marketing automation platforms (e.g. Bloomreach, Salesforce, HubSpot, Braze etc.)
• Strong understanding of customer data, segmentation, and campaign performance optimisation
• Comfortable working in a transformation or scaling environment

Why join?

• Join at a key moment and shape the future of CRM for a large, evolving business
• Work with modern tooling and a newly implemented data infrastructure
• Have a direct impact on customer experience, retention, and revenue growth
• Genuine opportunity to build, improve, and scale CRM capability
• A role that combines leadership and hands-on ownership

Process

• Initial intro chat
• Task-based interview and presentation

If you’re looking for a role where you can build, lead, and make a tangible impact, this is a great opportunity to step into a high-visibility CRM position during a major transformation journey.

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Head of Analytics

Salary
£90,000-£150,000 + bonus + benefits

Location + work pattern
London (Hybrid – 2-3 days in office)

THE ROLE
This is a senior leadership opportunity to build and lead a centralised Analytics & MI function operating as a shared service across multiple business areas. The role blends strategic direction with hands-on delivery, with a strong focus on turning data into actionable commercial insight.
Specifically, you can expect to be involved in:

• Leading and developing a high-performing analytics function, including managers and analysts
• Driving the shift from reporting to insight-led, decision-ready analytics across the business
• Embedding AI tools and automation into analytics workflows to enhance efficiency and impact
• Overseeing scalable data models, reporting automation, and governance frameworks
• Acting as a senior stakeholder partner, influencing priorities and delivering commercially relevant insight

YOUR SKILLS AND EXPERIENCE

• Proven experience leading Analytics or MI teams in a complex business environment
• Strong ability to translate data into clear, commercially actionable recommendations (“so what” thinking)
• Experience engaging and influencing senior stakeholders, including executive-level leaders
• Hands-on technical capability with SQL; Python or similar tools beneficial
• Familiarity with modern data platforms and visualisation tools (e.g. cloud data warehouses, BI tools)
• Understanding of AI tools and how they can be applied within analytics workflows

THE BENEFITS

• Competitive salary with performance-based bonus
• Private healthcare and pension contribution
• Generous annual leave allowance
• Opportunity to shape a modern, AI-enabled analytics function
• High visibility role with direct exposure to senior leadership

THE PROCESS

• Initial screening
• Interview with senior leadership
• Technical case study and presentation
• Final panel interview

HOW TO APPLY
Please register your interest via the apply link on this page.

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Graduate Data Scientist

London – 4 days a week

The Company
They are a modern, data-driven insurance provider focused on delivering flexible, tailored policies to customers. The business has expanded its product offering and built strong commercial partnerships, driving rapid growth. With around 100 employees, they are scaling quickly and investing heavily in advanced analytics and modelling. The culture is collaborative, fast-paced, and centred on innovation.

The Role
As a Graduate Data Scientist, you will work on models that sit at the core of the business and support key commercial decisions.

• Develop predictive models across pricing, risk, and customer acquisition
• Build clustering and segmentation models to support strategic decision-making
• Analyse large and complex datasets to uncover actionable insights
• Collaborate with analysts and engineers to deploy and productionise models
• Contribute to a greenfield modelling environment and help shape best practices
• Take ownership of projects with visibility across the wider business

Your Skills and Experience

• Strong academic background in a STEM subject such as Mathematics, Data Science, Computer Science, or similar
• Solid programming skills, ideally in Python
• Understanding of statistical modelling and machine learning fundamentals
• Hands-on experience through internships, placements, or personal projects
• Demonstrated curiosity and initiative, such as side projects or GitHub work
• Clear communication skills and the ability to collaborate with cross-functional teams
• Motivated, proactive, and keen to take ownership early in your career

What They Offer

• Hybrid working with a strong in-office culture
• Opportunity to work on high-impact, business-critical models
• Fast career progression as the team continues to grow
• Work abroad flexibility for short periods each year
• Supportive environment with strong learning and development opportunities

How to Apply
If you are a graduate or early-career data scientist looking to make an impact in a high-growth environment, please apply with your CV.

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Experimentation Specialist
London (Central), up to £45,000
This is a hands-on experimentation role with real ownership, sitting at the heart of a growing Centre of Excellence. You will work across multiple digital platforms, shaping experimentation strategy while remaining close to delivery and impact.
The Company
They are a large, established retail group with a strong digital footprint and a growing focus on data-led decision making. With multiple consumer brands under one umbrella, experimentation plays a critical role in improving customer experience and commercial performance. The business is investing heavily in experimentation capability, tooling and best practice. This role sits within a newly formed experimentation function that operates as an internal consultancy across the group.
The Role

• Support the build-out of a Centre of Excellence for experimentation across digital teams
• Translate business objectives and OKRs into clear experimentation roadmaps
• Prioritise, design and execute A/B tests across web and digital platforms
• Act as a hands-on experimentation specialist, not just test execution but strategic input
• Analyse results, communicate insights and influence decision making
• Partner closely with product, tech, analytics and CRM teams
• Own relationships with implementation and engineering teams to ensure tests are set up correctly
• Support the separation and alignment of website experimentation and CRM testing activity

Your Skills & Experience

• Strong experience running experimentation or CRO programmes in a digital environment
• Hands-on experience setting up and analysing A/B tests
• Solid understanding of experimentation principles, metrics and statistical concepts
• Experience with digital analytics and experimentation tools such as GA4, Optimizely or similar platforms
• Ability to build, communicate and manage an experimentation roadmap
• Confident working cross-functionally and independently in a fast-paced environment
• Comfortable balancing strategic thinking with hands-on delivery

What They Offer

• Salary up to £45,000 depending on experience
• Hybrid working with a strong in-office culture in central London
• The opportunity to help shape experimentation capability from the ground up
• High ownership and visibility across multiple digital brands
• Clear progression and long-term career development within experimentation and analytics
• Exposure to modern experimentation and analytics tooling
• A broad role covering strategy, analytics and implementation support

How to Apply
If you are looking for an experimentation role where you can have genuine impact and help shape best practice across a complex digital environment, apply today.

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SEO Manager
London or East Midlands | £33,000 to £45,000
This is an opportunity to step into a high-impact SEO Manager role where you will take real ownership of organic performance for a major e-commerce website. With two hires aligned to different retail propositions, this role offers scale, autonomy and visibility in a fast-paced, commercially driven environment.
The Company
They are a large, established UK retail organisation operating across multiple consumer brands with a strong digital footprint. Organic search plays a critical role in commercial performance, and SEO is highly valued across the wider business. With significant investment in tools, technology and agency support, they provide an environment where SEO can genuinely influence trading, buying and growth decisions.
The Role
You will own SEO performance for a key retail website, driving visibility, traffic and revenue through a hands-on, full-stack approach.

• Take end-to-end ownership of organic performance including rankings, traffic and revenue
• Build and execute SEO strategy across technical SEO, content and on-site optimisation
• Identify growth opportunities through keyword research and performance analysis
• Maintain site health including crawling, indexing and technical best practice
• Collaborate with internal commercial, trading and buying teams
• Manage and partner with external agencies to deliver SEO initiatives
• Track, analyse and report on performance against KPIs
• For one of the roles, support the development of more junior SEO team members

Your Skills & Experience

• Strong hands-on experience in SEO, either in-house or agency side
• Confidence owning and prioritising SEO activity in a fast-moving environment
• Experience across technical SEO and content optimisation
• Commercial mindset with the ability to influence stakeholders outside of marketing
• E-commerce experience is beneficial, though not essential
• Comfortable using tools such as Screaming Frog, Google Search Console and GA4
• Experience with enterprise SEO platforms and keyword tracking tools is a plus

What They Offer

• Salary between £33,000 and £45,000 depending on experience
• Hybrid working with four days per week in the office
• 20 days holiday plus bank holidays
• Pension scheme and wellbeing support
• Generous staff discounts across multiple consumer brands
• Discounted gym membership and cycle to work scheme
• Clear ownership, autonomy and exposure across large-scale retail websites
• Strong investment in learning, tools and agency support

How to Apply
If you are an SEO Manager looking for real ownership, scale and commercial impact, apply today to learn more about this opportunity.

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CRO Consultant
Egham, Surrey (hybrid working) | Salary up to £60,000, with flexibility for a senior profile
This is an opportunity to join a specialist experimentation and optimisation consultancy where CRO sits at the heart of everything they do. You will work directly with enterprise clients, owning end to end experimentation programmes and shaping how data driven optimisation is delivered across complex digital estates.
The Company
They are a UK based CRO, experimentation and personalisation technology business with both a proprietary platform and a consulting arm. The organisation partners with large, well known brands across sectors including retail, travel, public sector and entertainment. The culture is collaborative and delivery focused, with a strong emphasis on experimentation, learning and long term client impact.
The Role
You will sit within the consulting team, acting as a trusted CRO partner to your clients and leading experimentation programmes from ideation through to insight and recommendation.
Key responsibilities include:

• Leading CRO ideation and hypothesis development for client programmes
• Designing and planning A B and multivariate tests across web experiences
• Managing experimentation roadmaps and documentation
• Analysing test results and translating findings into clear recommendations
• Producing client facing decks and insight led outputs following experiments
• Running regular client check ins and supporting long term optimisation strategy
• Collaborating with internal product, customer success and consulting teams

Your Skills and Experience

• Strong commercial experience in CRO, experimentation or optimisation
• Proven ability to design, run and analyse A B testing programmes
• Comfortable working with stakeholders and presenting insight clearly
• Experience working in agency, consultancy, vendor or in house environments
• Exposure to experimentation tools such as Webtrends Optimize, VWO or similar
• Confident working independently while contributing to a wider team
• Passion for CRO and improving digital user experience through testing

What They Offer

• Salary up to £60,000, with flexibility for a strong senior profile
• Hybrid working, ideally 2 to 3 days per week onsite in Egham
• Broad client exposure across enterprise level organisations
• High ownership role within a growing consulting team
• Clear progression as the services function continues to scale

How to Apply
If you are a CRO Consultant looking for a client facing role with real ownership and variety, apply now to learn more.

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Engagement and Lifecycle Manager (Payments)
London Bridge, hybrid working three days in office, salary up to £48,000
This is a high-impact opportunity to own a critical part of the customer lifecycle for a large subscription-based business. The role sits at the intersection of CRM, payments, and customer experience, giving you real ownership over a pivotal commercial project with clear, measurable outcomes.
The Company
They are a well-established, consumer-facing organisation operating at significant scale, with a strong subscription model and a diverse portfolio of digital and media products. Customer experience sits at the heart of their strategy, and they continue to invest heavily in data-driven CRM, lifecycle marketing, and personalisation. The business operates in a collaborative, cross-functional environment with strong backing for strategic initiatives.
The Role

• Own the end-of-lifecycle contact strategy focused on payments, renewals, and failed or declined transactions
• Design and optimise customer communications to reduce payment-related churn and improve retention
• Analyse subscriber behaviour to understand why customers default and how to prevent this through smarter engagement
• Segment customers based on risk, payment method, and behaviour to deliver targeted and relevant messaging
• Define campaign strategy, content approach, and testing frameworks, working with CRM, design, and engineering teams for execution
• Run and evaluate tests across messaging, timing, and channels to identify what drives the best outcomes
• Track performance through key metrics such as payment success rates and churn reduction, clearly demonstrating business impact
• Contribute to wider lifecycle and win-back initiatives as the role evolves

Your Skills & Experience

• Strong experience in CRM, lifecycle, or retention marketing within a subscription-based business
• Proven exposure to payments, billing, renewals, or transactional communications
• Experience working with CRM platforms or customer data platforms such as Braze, Adobe, Salesforce Marketing Cloud, or similar
• Comfortable working with large customer datasets and translating insight into clear communication strategies
• A strategic mindset with the ability to influence stakeholders while collaborating closely with product, technology, and design teams

What They Offer

• Salary up to £48,000
• Hybrid working with three days per week in the London office
• Private medical insurance, including pre-existing conditions
• Generous pension contribution and enhanced family leave policies
• Extensive wellbeing support, training opportunities, and full access to LinkedIn Learning
• 25 days holiday plus bank holidays and volunteering days
• A broad range of lifestyle benefits, discounts, and exclusive experiences

How to Apply
Apply now to find out more about this opportunity and how you could play a key role in shaping payment and lifecycle strategy for a large-scale subscription business.

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