Slack logo

Sr Software Engineer, Backend

Slack

Job description

Slack is looking for Senior Backend Engineers to build features, design and implement API methods, and improve the performance and reliability of our systems as we rapidly scale our product and organization.We have backend engineers in almost every team across Slack, and in that role, you’ll be making some of the most significant decisions for the company.

We build our app using reliable tools that our team knows and trusts, including PHP/Hack, Java, MySQL, and Linux. Expertise in these areas is a huge plus, but having familiarity with other common web languages (such as Python or Ruby) and other relational databases are fine substitutes. We’re a collaborative team who genuinely enjoys working together with a cross-functional team of product managers, designers, frontend, iOS, Android, automation, and quality engineers to make Slack a better product. We are looking for engineers that understand that simplicity and reliability are aspects of a system to be carefully calculated with every decision made.

A taste of our scale and reach:


  • Users spend over 10 hours connected and 2+ hours active in Slack every work day.
  • 10M+ Daily Active Users in more than 150 countries.
  • 1.5 billion messages are sent per month, half of those outside the United States.
  • Every day we see over 8 million simultaneously connected users, over 3.5 billion web requests, over 42 billion database queries per day, and our systems see over 1 million queries/second in our caching tier.
  • We have 8.8M+ app installations with 155,000 weekly active developers building on the developer platform.
  • 90% of our paid teams on Slack actively use apps.
Slack has a positive, diverse, and supportive culture—we look for people who are curious, inventive, and work to be a little better every single day. In our work together we aim to be smart, humble, hardworking and, above all, collaborative. If this sounds like a good fit for you, why not say hello? 

What you will be doing


  • You'll brainstorm with Product Managers, Designers and Frontend Engineers to conceptualize and build new features for our large (and growing!) user base.
  • You’ll produce high-quality results by leading or contributing heavily to large cross-functional projects that have a significant impact on the business.
  • You’ll actively own features or systems and define their long-term health, while also improving the health of surrounding systems.
  • You'll assist our skilled support team and operations team in triaging and resolving production issues.
  • You'll mentor other engineers and deeply review code.
  • You’ll improve engineering standards, tooling, and processes

What you should have


  • You’ve been building web applications professionally for 5+ years.
  • You have experience with functional or imperative programming languages -- e.g., PHP, Python, Ruby, Go, C, or Java.
  • You can lead technical architecture discussions and help drive technical decisions within your team.
  • You write understandable, testable code with an eye towards maintainability.
  • You are a strong communicator. Explaining complex technical concepts to designers, support, and other engineers is no problem for you.
  • You possess strong computer science fundamentals: data structures, algorithms, programming languages, distributed systems, and information retrieval.
  • You have a bachelor's degree in Computer Science, Engineering or related field, or equivalent training, fellowship, or work experience.
Slack is registered as an employer in many, but not all, states. If you are not located in or able to work from a state where Slack is registered, you will not be eligible for employment. Visa sponsorship may not be available in certain remote locations.

Visa sponsorship is not available for candidates living outside the country of this position.

Slack has transformed business communication. It’s the leading channel-based messaging platform, used by millions to align their teams, unify their systems, and drive their businesses forward. Only Slack offers a secure, enterprise-grade environment that can scale with the largest companies in the world. It is a new layer of the business technology stack where people can work together more effectively, connect all their other software tools and services, and find the information they need to do their best work. Slack is where work happens.

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.

Apply now

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About this role

Apply before

May 6th, 2021

Job posted on

November 14th, 2020

Job type

Full Time

Hiring timezones

Slack is hiring for this role in the following timezones:

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Primary industry
Company size

1,001-5,000

Founded in

2009

Social media
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About the company

Slack has transformed business communication. It’s the leading channel-based messaging platform, used by millions to align their teams, unify their systems, and drive their businesses forward. Only Sla...
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