Signal AI • London, United Kingdom

Senior Site Reliability Engineer

Employment type:  Full time

3–4 days/week at home

A little flex time

Job Description

About Signal - Who are we?

We're on a mission to change the way businesses make decisions with our cutting-edge AI technology. To achieve that, we’re looking for passionate people to join our open and unconventional workplace. Our inclusive environment welcomes skills and experiences from diverse backgrounds and defines who we are.

What you’ll be doing?

You will be joining our SRE team, committed to evolve and operate our systems while we continue our rapid growth. While working together with the rest of Product & Technology teams, you will work on scaling, observability and security, driving our infrastructure to the next level.

Our team is responsible for:

  • The strategic management of our AWS infrastructure
  • Cloud cost optimization
  • The security, reliability, observability and operability of our platform.
  • The championing of SRE principles throughout all engineering teams
  • Define and clearly communicate security and service level information clearly to the company and our contractual teams

Senior for us means:

  • You can contribute strategic direction to the team
  • You have high agency to get things done - owning, finishing and delivering results
  • You can listen, be decisive and clear when communicating with others of all abilities.
  • You are capable of mentoring others and giving constructive feedback.

We rely heavily on the following technologies:

  • Terraform, Python, Go and Ansible for our infrastructure code.
  • Clojure and Python to write our application code
  • Elasticsearch for solving high volume distributed search problems
  • Postgres for most persistent data storage
  • Docker to run our services
  • AWS for our cloud hosting


  • You are able to prioritize collaboratively between tactical problems and strategic direction
  • You are comfortable developing and evolving software tooling to solve complex operational problems.
  • You have a deep knowledge of operational security and understand how to communicate this to clients and the business.
  • You are comfortable and effective working in a terminal environment.
  • You are proficient in a standard unix-based environment
  • You know when to use the right technical tool for the job at hand.
  • You have strong communication skills and are comfortable expressing your ideas to multiple different audiences
  • You are proactive with a positive attitude, well organised, and adept at managing competing deadlines and priorities
  • You are comfortable with and excited by a fast-paced and often changing environment, eager to solve new problems and learn new skills in order to succeed
  • You have a self-starter mindset; you proactively identify issues and opportunities and tackle them without being told to do so
  • You are a team player whom your colleagues can rely on

Nice to have:

  • You can demonstrate deep understanding of distributed sharded databases (elasticsearch or similar)
  • You can demonstrate experience scaling large distributed event-driven microservice architectures.

Don’t meet every single requirement listed? Academic research has shown that women or people of other underrepresented groups tend not to apply for jobs unless they meet every single qualification. At Signal AI, we know that diverse teams perform better so if your experience doesn’t fit perfectly but you’re excited about this role, we’d love for you to apply anyway.

We’re committed to building and fostering an inclusive environment where Signallers feel welcomed, valued and listened to - an environment where they thrive being their true selves.


  • Unlimited holiday entitlement;
  • Hybrid Working Environment - we have a hybrid remote policy with 2-3 days remote per week, plus Summer & Winter fully remote blocks wherever works for you, including abroad;
  • Share options;
  • Enhanced Maternity, Paternity and Dependents Leave policies;
  • Health Cash Plan/ Pension plan / Income Protection / Life Insurance / Access to free therapists via Spill.

Company benefits

Enhanced maternity leave
Enhanced paternity leave
Unlimited annual leave
Work from home allowance
Pension Scheme & Life Insurance Scheme
Mental Health & Wellness Support
Season Train Ticket Loan & Cycle To Work Scheme
Learning & Development
Workplace Nursery Benefit

The FlexScore® is the result of a rigorous 2-step verification of a company’s flexibility

First we assess the flexibility options Signal AI provides and then we anonymously survey a statistically significant proportion of their employees to make sure Signal AI is as flexible as they say they are. Our assessment is based on the six key elements of flexibility: location, hours, autonomy, benefits, role modelling and work-life balance.

We ask the hard questions so you don’t have to.

Working at Signal AI

Company employees


Gender diversity (male:female)


Office locations

London, New York, Hong Kong.

Funding levels


Hiring Countries

Hong Kong
United Kingdom
United States
What employees are saying

"I love the unlimited vacation, and summer and winter "work from anywhere" periods. I like the "2 days/week in the office" policy, and the understanding from my manager that some days I occasionally need to start later or finish earlier."

Anonymous Signal AI Employee

Awards & Achievements
Most flexible AI & VR companies

Most flexible AI & VR companies

Industry awards 2022