CircleCI is seeking a Senior Software Engineer who is excited to contribute to our internal Developer Tooling team. Our mission is to eliminate developer toil by creating and maintaining tools, services, and libraries that reduce time to delivery, reduce ongoing maintenance, and increase reliability. We enable engineers throughout CircleCI to do their work more efficiently by reducing manual and repetitive tasks. 

You will join a distributed team building features and services designed specifically for CircleCI engineering teams. You will write sustainable, resilient code, and partner with team members to define best practices as part of an engineering organization that values collaboration, trust, and learning. 

What you’ll do:

  • Develop new libraries, tools and services for use by engineering teams across CircleCI.
  • Write sustainable, high-quality, high-performance code.
  • Create and maintain documentation for internal technologies and best practices.
  • Work across teams to identify enhancements to our internal developer experience.
  • Facilitate adoption of our internal tooling.
  • Assist teams to leverage tools to gain better insight into the behavior of their systems in production.
  • Foster a culture of observability and monitoring. 

What we're looking for:

  • 3+ years of backend development experience with micro-services and distributed systems.
  • Enjoy improving internal processes and tooling. 
  • A focus on delivering high-quality code through strong testing practices.
  • You are interested in learning new languages and technologies. We use Clojure and Go, JavaScript/React, Kubernetes/Helm, MongoDB and PostGreSQL, and RabbitMQ, but it’s okay if you haven’t yet! More details on our tech stack can be found here.
  • Work transparently and collaboratively within a distributed team.
  • Strive for continuous learning and improvement for yourself and your team. 

We know there’s no such thing as an “ideal” candidate - we’re all a work in progress and are growing new skills and capabilities all the time. CircleCI welcomes those who are enthusiastic about learning and evolving, so however you identify and whatever your background, if this looks like a role where you could do work that is interesting to you, we hope you’ll apply! You can read more about our interview process here

CircleCI Engineering Competency Matrix 

The Engineering Competency Matrix is our internal career growth system for engineers. This position is level E3. If you are not sure this is you, we encourage you to apply. Find more about the matrix in this blog post.

Work remotely with our globally distributed team!

We’re a distributed company with teammates across the world. For this role, we are hiring engineers to work remotely in Ireland and United Kingdom.

About CircleCI 

CircleCI is the world’s largest shared continuous integration and continuous delivery (CI/CD) platform, and the central hub where code moves from idea to delivery. As one of the most-used DevOps tools that processes more than 1 million builds a day, CircleCI has unique access to data on how engineering teams work, and how their code runs. Companies like Spotify, Coinbase, Stitch Fix, and BuzzFeed use us to improve engineering team productivity, release better products, and get to market faster. 

CircleCI is proud to be an Equal Opportunity and Affirmative Action employer. We do not discriminate based upon race, religion, color, national origin, sexual orientation, gender, gender identity, gender expression, transgender status, sexual stereotypes, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state and local law.

Apply for this Job

* Required



At CircleCI we deeply understand the value of bringing together a team with different perspectives, backgrounds and experiences, and welcome all applicants regardless of race, color, religion, creed, age, national origin or ancestry, ethnicity, sex, sexual orientation, gender identity or expression, disability, military or veteran status.

While the disclosure of your personal information is optional, completely anonymous and not attached to your application, we ask you to consider sharing this information to help us understand who is interested in working here, and help us get better at providing a positive, fair and unbiased experience for all applicants.  We understand that many applicants, especially those of marginalized groups, are often fearful that disclosing this personal information might create a barrier of entry for them.  We want to assure you that your answers will remain absolutely anonymous, and that we will use this data only to help us get better at supporting all candidates as they move through our interview process.

We appreciate your help and for your trust in our efforts to make CircleCI a place of equal opportunity for everyone.

How do you identify your gender?

Are you a veteran?

What is your ability status?

Which races/ethnicities do you belong to?