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Data Science at Tessian


Our mission is to secure the human layer. This involves deploying near real-time machine learning models at massive scale to some of the world’s largest organisations to keep their most sensitive data private and secure. To do this, we're looking for a senior data scientist with NLP experience ready to work on hard problems, drive best practice and cultivate an environment of experimentation and learning. Companies can leverage data science in a number of ways, and we think the role of a Data Scientist falls into three distinct categories: 


1) You work for a business function analysing & reporting on how to improve a key metric, e.g increasing user conversion


2) You are responsible for writing production models to enhance the main product, e.g recommendation systems for e-commerce


3) You are the product - without machine learning, it wouldn't exist 


The Data Science team built the product at Tessian. We couldn't exist without our machine learning models; it’s at the heart of what we do, and it’s what our clients rely on day-to-day. We're searching for a Lead NLP Data Scientist who is excited about the opportunities and challenges that come with researching, building and deploying real-time production models. In this role you'll get to:



  • Work across massive enterprise email datasets

  • Deploy models to production that impacts directly our customers and products

  • Improve our ML workflow

  • Collaborate with engineering and product leaders to develop a product suite that is continually detecting more advanced threats for our customers

  • Make your mark on leading ambitious projects

  • Mentor and knowledge share with data scientists at Tessian


We'd love to meet someone who:



  • 4+ years Data Science experience

  • Has strong NLP experience (in production)

  • Has worked with, or understands the principles behind working with data at scale

  • Can balance longer term projects alongside impactful quick wins

  • Cares deeply about the impact their team hasIs a creative at heart, and can encourage novel ways of thinking in their team. This has always been a core part of the data science team’s DNA

  • Reads Rules of Machine Learning - Martin Zinkevich and it resonates with how they think about machine learning and data science


Why we think you'll love it here.... 



  • It’s important to us that all Tessians are part of the journey we’re on, so we offer equity options with every role and benchmark to provide above market rate salaries - there’s plenty more too…. 


Be at your best, both inside and outside of work 



  • 25 days of paid holiday (plus 8 bank holidays, and an additional day for every year you've worked at Tessian!)

  • Private health insurance provided through Vitality Health and mental health support through our Employee Assistance Program

  • Classpass - subsided access to gym time and classes all across London

  • Choice First: Do your best work, in the way that works best for you

  • Flexible working hours and working from home (if you're not already remote!)

  • Work-from-home subsidy upon joining, so you can kit out your home office

  • Enhanced pension contributions, matched up to 5%

  • We’re family friendly, with policies built to support you in all stages of life

  • High-quality tech kit provided for you to work on, plus Tessian ANC headphones

  • If you're relocating to join the team, we'll provide a contribution to help with your costs 


Beyond work 


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