Senior Security Engineer

About Intercom

The way businesses talk to people online today is broken. Intercom is fixing it.
Intercom is the first to bring sales, marketing & customer service products to one messaging platform, helping businesses avoid the stiff, spammy status quo and have real conversations with the people that matter. Designed to feel like the messaging apps you use every day, Intercom is the only business messenger to let you talk to consumers just about anywhere: inside your app, on your website, across social media and via email.
Intercom invented in-app messaging in 2011, and today more than 13,000 businesses use Intercom to reach a billion people around the world. Intercom has 300 employees split between its San Francisco headquarters and its Dublin R&D office, and has raised $116M in venture funding.

What's the opportunity?

Our security team is responsible for making sure all our products are designed and implemented to the highest security standards. Keeping our customers' data secure is the most important thing that Intercom does. As both our product offering and our customer base continues to grow (we now have over 13k paying customers and counting!), we need to scale up our security and we’re looking for an experienced engineer to join our team.  

This is a special role in that you would be working on all aspects of security (app, infrastructure, penetration testing, audit & compliance, development, etc.) rather than specialising in just one aspect, as is the case with larger teams in larger companies. Also unlike most companies, we design and build our product entirely in Dublin, so you will be uniquely positioned to own and drive security policies and technologies across all parts of Intercom. Find out more about our engineering culture here.

What will I be doing?

You will get to work directly with our product and infrastructure engineering teams, you will also build and own tools, services and infrastructure used across the company.

You will:

  • Perform technical security assessments on web applications, mobile clients, and architecture designs
  • Maintain and create secure development practices and programs for our growing engineering teams
  • Communicate security risks to engineering teams through training and technical demonstration of vulnerabilities and secure design patterns for security topics
  • Conduct security code reviews, and architectural reviews
  • Partner with other teams at Intercom to constantly improve our defensive posture
  • Work on new product features to make Intercom users and data more secure
  • Help us maintain security compliance and certification

Example projects might include:

  • developing a new secure signup workflow for the main Intercom application
  • building a centralised, 2-factor authentication system to manage access to all internal Intercom systems
  • evolving our operational logging infrastructure, adding alerting on unusual events
  • helping us build a better corporate and production infrastructure

What skills do I need?

You need to be an experienced security engineer, preferably a generalist or a specialist with an interest in all aspects of security. You should prefer automating work over manual processes - we love automation and would love you to build your own tools for automating processes.

You also need:

  • Practical experience and proficiency with a high level programming language (e.g. Ruby, Python, Perl) -  this skill is essential for you to be able to create tools and work with product engineers on the existing body of code
  • Solid understanding of web application architecture - Intercom is a web app, so you need to know how to secure web apps

Bonus skills & attributes:

  • Experience running and managing services on AWS or similar cloud services
  • Familiarity with core internet technologies (e.g. TCP/IP)
  • Background using Linux - all of our apps run on Linux


We are a well treated bunch, with awesome benefits! If there’s something important to you that’s not on this list, talk to us! :)

  • Competitive salary and meaningful equity in a fast-growing start-up
  • We serve breakfast, lunch, and dinner every weekday! There are also snacks and drinks on tap to keep you topped up
  • Regular compensation reviews - we reward great work!
  • Peace of mind with life assurance, as well as comprehensive health and dental insurance for you and your dependents
  • Open vacation policy and flexible holidays so you can take time off when you need to
  • Paid parental leave to let you spend valuable time with your loved ones
  • Commuting is a breeze with our generous public transport allowance
  • Keep active with our roaming FlyeFit gyms in Dublin membership!
  • If you’re cycling, we’ve got you covered on the Cycle-to-Work Scheme. With secure bike storage too!
  • MacBooks are our standard, but we’re happy to get you whatever equipment helps you get your job done
  • We also offer generous relocation assistance for certain roles for people joining us from overseas.

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