If you would like to discuss DEI at Futureheads please contact <a href="mailto:team@wearefutureheads.co.uk">team@wearefutureheads.co.uk</a>

<div style="text-align: center;"><strong>We aim to be brave. We won’t get it right all the time, but we believe it's better to say and do something rather than nothing, and to learn from our mistakes.</strong></div>

 <p>                     <strong>                       But we’re now striving to be better and to drive positive                       change. We firmly believe that everyone is welcome at                       Futureheads, and we aim to demonstrate that in everything                       we do.                     </strong>                   </p>                   We’re committed to creating a culture that reflects the                   make-up of society, we believe diversity promotes innovation,                   growth and equality. We are committed to being intentionally                   inclusive by understanding who we have in our culture and how                   we can best add equity to each individual, and contribute                   towards their professional development. We are actively                   helping our clients do the same. We celebrate the difference                   and rich experience that diversity brings, and we commit to                   ensuring that everyone we interact with, both within and                   outside our business, is valued, respected, and treated                   equally, regardless of their background, identity or                   circumstances. We aim to understand every individual’s                   capabilities, and to give them what they need to succeed to                   their fullest potential.

Get in touch

Information

Links

<span><h1>hello world</h1> </span>

Timesheet Login

Hello, <span>we are Futureheads.</span>

About Us

Recruiting as a <span>force for good.</span>

Being part of something bigger

Come and say hello

Contact Us

Everyone is welcome

Diversity, Equity & Inclusion

Future Thinkers

Watch from the experts

Stay in the know

Insights

Start your next journey <span>here</span>

Job Search

Job Details

Hello, future colleagues!

Join Us

News & Views

News

Looking to hire digital and tech talent?

Register A Role

<p>Register a role with us today; our team will be in touch immediately (or at a time that best suits you).</p>                  <p> Our team of digital recruiters are committed to finding the best talent to meet your hiring needs.</p>                  <p>Please provide us with the below information for us to direct your request to the relevant team.</p>

We are here to support your hiring across the full product life cycle.

Sectors we cover

Lorem ipsum dolor sit amet

Our Solutions

Looking for your next digital or tech role?

Submit CV

Submit Vacancy

We love <span>what we do.</span>

Meet The Team

What people say about me

Meet the team

Testimonials

Latest Insights

News &amp; Views

Latest Opportunities

Register a role

Futureheads in Numbers

<strong>Principal Machine Learning Engineer</strong><br><strong>Location:</strong> London, UK (Hybrid)<br> <strong>Employment Type:</strong> Full-Time<br> <strong>Department:</strong> Engineering<br><strong>Principal Machine Learning Engineer</strong><br><strong>About the Company</strong><br>The company is building an AI-native smart assistant designed to help everyday users manage conversations, tasks, organisation, and workflows with minimal prompting.<br>The product focuses on creating reliable AI systems that can support long-running workflows, persistent context, multi-step reasoning, external tool interaction, and real-world task completion. The goal is to help users complete everyday tasks significantly faster through intelligent automation.<br><strong>The Role</strong><br>As a <strong>Principal Machine Learning Engineer</strong>, you will be responsible for turning research direction into production-grade machine learning systems.<br>This role owns the execution layer of the company’s intelligence platform, covering training pipelines, inference systems, evaluation tooling, and deployment. You will work on building scalable, reliable ML infrastructure that can support real-world AI product experiences.<br><strong>Key Responsibilities</strong><br><ul><li>Build and own end-to-end ML pipelines across data, training, evaluation, inference, and deployment.</li><li>Fine-tune and adapt models using modern techniques such as LoRA, QLoRA, SFT, DPO, and distillation.</li><li>Architect and operate scalable inference systems, balancing latency, cost, and reliability.</li><li>Design and maintain data systems for high-quality synthetic and real-world training data.</li><li>Build evaluation pipelines covering performance, robustness, safety, and bias in partnership with research leadership.</li><li>Own production deployment, including GPU optimisation, memory efficiency, latency reduction, and scaling policies.</li><li>Collaborate closely with application engineering teams to integrate ML systems into backend, mobile, and desktop products.</li><li>Make pragmatic trade-offs and ship improvements quickly based on real user feedback.</li><li>Work within real production constraints including latency, cost, reliability, and safety.</li></ul><strong>Required Experience</strong><br><strong>Technical Skills</strong><br><ul><li>Strong background in deep learning and transformer-based architectures.</li><li>Hands-on experience training, fine-tuning, or deploying large-scale machine learning models in production.</li><li>Proficiency with at least one modern ML framework such as PyTorch or JAX.</li><li>Experience with distributed training and inference frameworks such as DeepSpeed, FSDP, Megatron, ZeRO, or Ray.</li><li>Strong software engineering fundamentals, with the ability to write robust, maintainable, production-grade systems.</li><li>Experience with GPU optimisation, including memory efficiency, quantisation, and mixed precision.</li></ul><strong>Personal Attributes</strong><br><ul><li>Comfortable owning ambiguous, zero-to-one ML systems end-to-end.</li><li>Strong bias toward shipping, learning quickly, and improving systems through iteration.</li><li>Able to exercise sound judgement and work independently in a fast-moving environment.</li></ul><strong>Ideal Experience</strong><br>The ideal candidate may also bring experience in:<br><ul><li>LLM inference frameworks such as vLLM, TensorRT-LLM, or FasterTransformer.</li><li>Open-source contributions to machine learning or systems libraries.</li><li>Scientific computing, compilers, or GPU kernels.</li><li>RLHF pipelines including PPO, DPO, or ORPO.</li><li>Training or deploying multimodal or diffusion models.</li><li>Large-scale data processing tools such as Apache Arrow, Spark, or Ray.</li></ul><strong>Working Environment</strong><br>The company believes the best products are built by small, world-class teams with high talent density. The team works collaboratively, moves quickly, and balances high-quality delivery with continuous learning.<br>Team members are expected to bring structure, exercise judgement, and execute independently while contributing to a product designed to deliver practical AI benefits at global scale.<br /><br /><em><em>We encourage applicants from all backgrounds, so if there is anything we can do to make our recruitment processes better for you and to allow you to show your best self, let us know. We also understand that some people require extra time to complete assessments, require alternative application methods and can also benefit from having interview questions or a guide to the type of questions pre-interview. We are open to any suggestions or requests that you may have and are always looking for creative ways to assess talent. Our commitment to you is that you should always feel safe and secure when you’re working with us. Futureheads is a B Corp™ accredited digital recruitment agency based in London. We specialise in recruiting permanent, contract and freelance digital and tech professionals in creative, data, design, digital marketing, engineering, product, project and programme management, UX and service design jobs.</em></em>

Principal Machine Learning Engineer

Fabio Guiances Calvente

<p data-olk-copy-source="MessageBody">Fabio brings to the team a deep specialism in Data, AI, and technology talent across the UK and Europe. With over 15 years of experience in the industry, he has partnered with organisations to optimise hiring strategies, build high-performing teams, and connect top-tier talent with forward-thinking businesses.</p>
<p>In his role as a Lead Consultant, Fabio focuses on helping companies scale their Data and AI capabilities by identifying and engaging hard-to-reach talent across engineering, analytics, and emerging technology functions. He is passionate about the evolving impact of AI and data on the world of work, and is driven by building meaningful relationships that create long-term value for both clients and candidates.</p>
<p>Outside of work, Fabio is very family-oriented and regularly spends time with his family in Spain, as well as with his parents&rsquo; parrot and two dogs.</p>

With positions across agencies, brands, start-ups and tech companies, we work with Creatives delivering new brands, campaigns and integrated experiences. From hiring freelance Creative Teams to your first in-house Copywriter, we’ve got it covered. 

<div class="row">
  <div class="col-12 col-sm-12 col-md-6">
    <p>With positions across agencies, brands, start-ups and tech companies, we work with Creatives delivering new brands, campaigns and integrated experiences. From hiring freelance Creative Teams to your first in-house Copywriter, we’ve got it covered.</p>
  </div>
  <div class="col-12 col-sm-12 col-md-6">
    <h5>Our network includes professionals in:</h5> 
    <ul>
      <li>Motion Graphics & Video Editing</li>
      <li>Branding</li>
      <li>Copywriting</li>
      <li>Art Direction</li>
      <li>Illustration</li>
      <li>Digital Design</li>
      <li>Marketing Design</li>
    </ul>
  </div>
</div>

Creative

We partner with organisations to identify and deliver security professionals who can safeguard environments, manage risk and build resilient security strategies.

<div class="row">
  <div class="col-12 col-sm-12 col-md-6">
  <p>As cyber threats continue to evolve in scale and sophistication, organisations face increasing pressure to protect their systems, data and people. Securing the right cyber security talent across GRC, security operations, and cloud and application security is critical. We partner with organisations to identify and deliver security professionals who can safeguard environments, manage risk and build resilient security strategies.</p>
  </div>
  <div class="col-12 col-sm-12 col-md-6">
    <h5>Our network includes professionals in:</h5>
    <ul>
      <li>Cyber Security Analyst (Entry to Senior)</li>
      <li>SOC Analyst (Tier 1–3)</li>
      <li>GRC Analyst / Consultant</li>
      <li>Security Engineer (Cloud, Application, DevSecOps)</li>
      <li>Penetration Tester / Ethical Hacker</li>
      <li>Incident Response and Threat Intelligence Analyst</li>
      <li>Security Architect</li>
      <li>Cyber Security Manager</li>
      <li>Head of Information Security / CISO</li>
      </ul>
  </div>
</div>

Cybersecurity

Navigating the complexities of AI, machine learning, and data integrity presents a growing challenge for businesses, especially when it comes to hiring professionals with the right blend of compliance, system integration and advanced analytics expertise. That’s where we come in. 

<div class="row">
  <div class="col-12 col-sm-12 col-md-6">
    <p>Navigating the complexities of AI, machine learning, and data integrity presents a growing challenge for businesses, especially when it comes to hiring professionals with the right blend of compliance, system integration and advanced analytics expertise. That’s where we come in.</p>
  </div>
  <div class="col-12 col-sm-12 col-md-6">
    <h5>Our network of data professionals includes experts in:</h5>
    <ul>
      <li>Data Engineering</li>
      <li>Data Science</li>
      <li>​Data Analytics</li>
      <li>​Machine Learning</li>
      <li>AI Research and Development</li>
      <li>​ML Ops</li>
      <li>​Data Governance</li>
      <li>Head of Data</li>
      <li>CDO</li>
    </ul>
  </div>
</div>

Data & AI

Our niche is technical experts who specialise in IT and digital projects, across multiple platforms and technology stacks. Come and talk to us about all things Engineering, from entry to CTO-Level.

<div class="row">
  <div class="col-12 col-sm-12 col-md-6">
    <p>Our niche is technical experts who specialise in IT and digital projects, across multiple platforms and technology stacks. Come and talk to us about all things Engineering, from entry to CTO-Level.</p>
  </div>
  <div class="col-12 col-sm-12 col-md-6">
    <h5>Our network includes professionals across:</h5>
    <ul>
      <li>Front-end</li>
      <li>​Back-end​</li>
      <li>​Full-stack​</li>
      <li>Native Mobile​​</li>
      <li>Cross-platform​​</li>
      <li>Technical Architecture​​</li>
      <li>Solution Architecture​​</li>
       <li>DevOps / SRE / Platform Engineering</li>
      <li>Testing & QA</li>
      <li>Engineering Managers</li>
      <li>Head of Engineering</li>
      <li>CTO</li>
    </ul>
  </div>
</div>

Engineering

We know that the world of Digital Marketing moves at a fast pace. That’s why our teams are on hand to support, and always ahead of the curve.

<div class="row">
  <div class="col-12 col-sm-12 col-md-6">
    <p>We know that the world of Digital Marketing moves at a fast pace. That’s why our teams are on hand to support, and always ahead of the curve.</p>
  </div>
  <div class="col-12 col-sm-12 col-md-6">
    <h5>Our network includes professionals in:</h5>
    <ul>
      <li>Multidisciplinary Marketing Management</li>
      <li>Product Marketing</li>
      <li>Growth Marketing</li>
      <li>Performance Marketing</li>
      <li>CRM</li>
      <li>Social Media</li>
      <li>Marketing Ops</li>
      <li>Affiliate Marketing</li>
    </ul>
  </div>
</div>

Marketing & Sales

From recruiting your first Product Owner to hiring your next experienced Product Managers, our recruiters have developed a specialist Product network in the design and tech space. They are trusted experts in sourcing and delivering both permanent and contract professionals in the field.

<div class="row">
  <div class="col-12 col-sm-12 col-md-6">
    <p>From recruiting your first Product Owner to hiring your next experienced Product Managers, our recruiters have developed a specialist Product network in the design and tech space. They are trusted experts in sourcing and delivering both permanent and contract professionals in the field.</p>
  </div>
  <div class="col-12 col-sm-12 col-md-6">
    <h5>Our network includes:</h5>
    <ul>
      <li>Chief Product Officers (CPO)</li>
      <li>VPs of Product Management​</li>
      <li>Directors of Product Management</li>
      <li>Product Managers​​</li>
      <li>Product Owners</li>
    </ul>
  </div>
</div>

Product

Part of our founding offering; since 2009 we have been part of the growth and evolution of the Design market in the UK. With a comprehensive network across all major skills-sets we have consistently helped businesses hire world-class Design talent. 

<div class="row">
  <div class="col-12 col-sm-12 col-md-6">
    <p>Part of our founding offering; since 2009 we have been part of the growth and evolution of the Design market in the UK. With a comprehensive network across all major skills-sets we have consistently helped businesses hire world-class Design talent.</p>
  </div>
  <div class="col-12 col-sm-12 col-md-6">
    <h5> Our network includes Designers with skills in:</h5>
    <ul>
      <li>Digital Product (UX/UI) Design</li>
      <li>User Interface (UI) Design</li>
      <li>​Visual Design</li>
      
    </ul>
  </div>
</div>

Product Design

With a deep understanding of what is required from Project Managers and Programme Managers in the digital and tech space, we can help you find the talent to deliver better budget controls, communication and reporting as well as ways to introduce new processes, tools and technology to optimise efficiency. 

<div class="row">
  <div class="col-12 col-sm-12 col-md-6">
    <p>With a deep understanding of what is required from Project Managers and Programme Managers in the digital and tech space, we can help you find the talent to deliver better budget controls, communication and reporting as well as ways to introduce new processes, tools and technology to optimise efficiency.</p>
  </div>
  <div class="col-12 col-sm-12 col-md-6">
    <h5>Our network includes:</h5>
    <ul>
      <li>Digital & Technical Project Managers</li>
      <li>Programme Managers</li>
      <li>Delivery Managers</li>
      <li>Business Analysts</li>
      <li>Scrum Masters</li>
    </ul>
  </div>
</div>

Projects & Delivery

From helping shape the London UX market in its early days, to running and sponsoring some of the best-known UX networking events in the UK, we're highly regarded for our breadth and depth of expertise in this space and for our ability to match top-tier UX practitioners into brilliant opportunities. 

<div class="row">
  <div class="col-12 col-sm-12 col-md-6">
    <p>From helping shape the London UX market in its early days, to running and sponsoring some of the most well-known UX networking events in the UK, we're highly regarded for our breadth and depth of expertise in this space and for our ability to match top-tier UX practitioners into brilliant opportunities.</p>
  </div>
  <div class="col-12 col-sm-12 col-md-6">
    <h5>Our network includes practitioners with skills across:</h5>
    <ul>
      <li>User Research</li>
      <li>UX & Interaction Design​</li>
      <li>​Service Design​</li>
      <li>Content Design</li>
    </ul>
  </div>
</div>

Apply now