Join us on our mission to keep the world’s most sensitive systems and data private and secure.

Founded 2013
51-200 employees
  • Cybersecurity
  • Headquarters address
    3 Finsbury Ave, London, EC2M 2PA

    About Us

    At Tessian (formerly CheckRecipient), we have the ambitious goal of protecting enterprise networks against new and intelligent cyber threats, making it impossible for sensitive information to end up in the wrong hands.

    Through advanced machine learning and natural language processing (NLP), Tessian prevents breaches in real-time, outsmarting traditional rule-based, admin-intensive approaches which can only report a breach after it has occurred.

    Founded by a team of Imperial College engineers, we’re backed by some of the world’s leading technology investors. We work with international clients in the financial, legal and professional services sectors who trust us to find the most intelligent ways to keep their data secure.

    We’ve recently closed a Series B fundraising round of $42m led by Sequoia and we are looking to work with the brightest minds to help us accomplish our goal and help us defend our clients against the biggest cybersecurity problems.

    In the Engineering Team we...

    • build quickly and follow both agile and continuous delivery paradigms
    • design reliable distributed systems that handle high volumes of data with low latency
    • maintain and support business-critical systems
    • ship code to production every day using CI/CD techniques
    • tackle the challenges that come with processing highly sensitive data
    • value security over box-ticking
    • are agnostic in our approach to problem solving and favour hiring engineers who pride themselves on their ability to learn new skills, their comfort with the unknown and their willingness to experiment

    Our various tech stacks include:

    • Python 3
    • React
    • Node.js
    • C#
    • Environments built around Docker and AWS
    • High volume PostgreSQL databases
    • Concourse for CI/CD
    • Terraform built environments

    We'd love to meet you if you...

    • are a great problem solver who takes pride in their work
    • value getting things done over getting things perfect
    • are comfortable with the unknown and love to experiment
    • can construct good arguments for methodologies or practices
    • have worked with, or understand the principles behind working with data at scale
    • are passionate about engineering
    • have an interest in machine learning

    Our Values

    From software engineering through to business development, our values are the foundation of our company and guide the decisions we make every day.

    • We are bold and courageous in our ambition.
    • We are guided by integrity.
    • We are passionate about our work.
    • We empower our people to achieve excellence.
    • We are fixated on our customers’ success.

    Tech stack

    Python, PostgreSQL, AWS, Docker, NodeJS, React, C#, Ansible, SQLAlchemy


    Compensation and retirement

    Stock Options
    Pension plan

    Vacation and time off

    Paid time off
    Flexible working hours
    Work from home flexibility
    Maternity benefits
    Paternity benefits

    Values and quality of life

    Snacks and beverages
    Catered breakfasts
    Company activities
    Games and recreation
    Tessian - LegalGeek Best Machine Intelligence winners!
    Tessian - Superheroes!
    Tessian - Our awesome roof terrace!
    Tessian - Infosec 2017