Software Engineering Internship

Slack is looking for interns to work alongside our engineers for the summer of 2020. These full time internships are a unique opportunity for someone currently pursuing a BS, MS, or PhD in Computer Science, Engineering, or equivalent training, fellowship, or bootcamp completion, who wishes to gain hands-on experience in an industry setting. You will have the opportunity to work on a collaborative team and be paired with one of our engineers who will be your mentor throughout the course of the program.  


You will demonstrate:

A strong work ethic, an eagerness to jump in and help fix things

Curiosity about how things work and tenacity to learn

Self-awareness and a desire to improve your skills

Strong communication skills, a positive attitude and empathy


You'll work in one of the following areas:


Our team works to create delightful features, while designing and implementing useful API methods to improve the reliability of our systems. We build our app using reliable tools that our team knows and trusts, including Java, Hack/PHP, MySQL, and Linux. Familiarity with either Java or Hack/PHP is required.



You will use React, Javascript, and CSS to improve the Slack web client, a complex in-browser application relied upon by millions of users every day. You will work with real-time data streams, engineer for performance across browsers, and delight people by making the best software we can imagine. Working closely with Product, Design, Backend, and QA to build, test and deploy new features. Familiarity with React is a plus, knowledge of Javascript is required.



We build Slack using reliable tools that our team knows and trusts, including PHP/Hack, Java/Scala, Python, MySQL, and Linux. Experience with Apache Spark, Hadoop (or other Map-Reduce frameworks), and Airflow (or other scheduling tools like Luigi) is a huge plus. We're a collaborative team that genuinely enjoys working together with a cross-functional group of product managers, designers, front-end, iOS, Android, automation, and quality engineers to make Slack a better product. 

Slack is a layer of the business technology stack that brings together people, data, and applications – a single place where people can effectively work together, find important information, and access hundreds of thousands of critical applications and services to do their best work. From global Fortune 100 companies to corner markets, businesses and teams of all kinds use Slack to bring the right people together with all the right information. Slack is headquartered in San Francisco, CA and has ten offices around the world. For more information on how Slack makes teams better connected, visit

Ensuring a diverse and inclusive workplace where we learn from each other is core to Slack’s values. We welcome people of different backgrounds, experiences, abilities and perspectives. We are an equal opportunity employer and a pleasant and supportive place to work.

Come do the best work of your life here at Slack.