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Tessian's Human Layer Security platform uses machine learning to understand human relationships and communication behavior in order to protect businesses from threats executed by people on email.

Senior Backend Engineer
London, GB
Job Description / Skills Required


Tessian protects every business’s mission by securing the human layer.

Using machine learning technology, Tessian automatically predicts and eliminates advanced threats on email caused by human error - like data exfiltration, accidental data loss, business email compromise and phishing attacks - with minimal disruption to employees' workflow. As a result, employees are empowered to do their best work, without security getting in their way.

Founded in 2013, Tessian is backed by renowned investors like Sequoia, Accel and Balderton and has offices in San Francisco and London.

Backend Engineering at Tessian

 At Tessian, we're building machine-intelligent filters to secure enterprise communications. This involves high volume, low latency data processing for some of the world’s largest organisations.

Our mission is to keep the world’s most sensitive data private and secure - to do this we're looking for backend engineers to help build out our platform supporting our next stage of growth.

The backend systems power the whole company and our teams have touch points with all of our engineering teams. From deploying data science models in production to integrating with our front end, you'll be involved in projects that span all aspects of the business.

Our teams are made up of people from diverse backgrounds; some have been building Python systems for years and some have learnt the ins and outs of Python on the job.

Read more about Engineering at Tessian:

As a Tessian Backend Engineer you will

        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
        Make your mark on ambitious projects

Our backend tech stack includes

        Python 3
        Environments built around Docker and AWS
        High volume PostgreSQL databases
        Concourse for CI/CD
        Terraform built environments

We'd love to meet someone who

        Has 4+ years of Software Engineering experience
        Is a great problem solver who takes pride in their work
        Values getting things done over getting things perfect
        Is comfortable with the unknown and loves to experiment
        Can construct good arguments for methodologies or practices
        Has worked with, or understands the principles behind working with data at scale
        A passionate software developer, either with Python experience or excited to learn it
        Ideally has an interest in machine learning

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 (including 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
-Flexible working hours and working from home (if you're not already remote!)
-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 including Tessian ANC headphones
-If you're relocating to join the team, we'll provide a contribution to help with your costs

Beyond work

-Elite membership of the Tessian House System...
-On Fridays we stop at 5 and share team updates and drinks
-Monthly remote team socials & a big, whole team extravaganza every quarter
-Never-ending ping-pong tournaments

Equality & diversity

Tessian is an equal opportunity employer, committed to equality and diversity amongst both our employees and prospective applicants. The Human Layer we're securing is diverse, and we know we need to be diverse and inclusive to successfully create HLS that reflects this. You can read our equality and diversity statement here.

As part of our commitment to equality and diversity, we're also a corporate member of the WISE Campaign for gender equality in STEM & we're a founding member of the WEDS network driving diversity & inclusion in startups.

Important notices

Please note that we do not accept applications or résumés from recruiters. Any unsolicited CVs, profiles, or names, submitted in any format, by any channel, to any of our team, will be deemed to fall outside any terms and/or conditions with either the person submitting the information or their company of employment/representation.

By submitting your application to Tessian, you consent to Tessian retaining your information and contacting you about future job opportunities, that may be of interest, for up to 2 years in accordance with our Privacy Policy

Please note, that any job offers will be subject to the candidate passing background screening checks.