Twitter is what’s happening and what people are talking about right now. For us, life's not about a job, it's about purpose. We believe real change starts with conversation. Here, your voice matters. Come as you are and together we'll do what's right (not what's easy) to serve the public conversation.

Who we are

The Core System Libraries team provides key distributed systems libraries which enable engineers to build reliable and efficient Twitter-scale services. Ensuring the resiliency of Twitter’s core libraries directly impacts the lives of our users and the success of our business.

What the job is

You will diagnose, and tackle complex distributed systems problems and provide solutions that have fundamental impact at our massive scale. You will define and deliver libraries which enable engineers to build reliable and efficient Twitter-scale services.

Why it matters

Our libraries are the fundamental building block of all services at Twitter. We serve hundreds of internal customers supporting crucial services. Our work is high-leverage since improvements in our core libraries benefit all services owners. We enable product developers to focus on product development instead of the details of scale, performance, availability, and security.

What you will be doing

As an engineer on our team, you will face some of the hardest problems in modern software engineering. The scale at which your code will operate require not only producing and using highly-performant algorithms and data structures, but also solving complex problems involving emergent behavior of distributed systems. This is an opportunity to work on some of the world’s most highly-scaled distributed systems. Our core infrastructure receives hundreds of millions of tweets per day and serves tens of billions of API requests, while meeting stringent availability requirements. You will have ample opportunities to both learn, teach, and grow. We collaborate to bring out the best in each other. You and your fellow engineers will power the core libraries relied on every single day by Twitter’s engineers who support and build the Twitter product. Many of our team's libraries are open-source including Finagle, Finatra, and others. Your work in our core libraries will play a key role in Twitter user satisfaction and growth as we grow to new scales to serve the public conversation.

What it takes

Below are some of the qualities we’d like to see in a new team member. This list might seem long, but don’t let it scare you off. If you’re enthusiastic about Twitter and about services at scale, please apply!

• You are passionate about continually redefining the limits of scale and performance.

• You’re self-directed and can drive features and systems from technical design through to production.

• You’re always looking for opportunities to grow and learn.

• You are interested in working closely with a diverse, multi-functional team; you think critically about users’ needs and can translate those findings into features and products.

Requirements:

• BS, MS, or PhD in Computer Science, or equivalent work experience

• Occasional on-call support during non-standard business hours

• Minimal travel required (2-4 weeks per year)

Ideally, you have experience with:

• Distributed systems, performance analysis, web infrastructure, and/or large-scale data processing

• JVM development, including asynchronous I/O, concurrency, and the Java memory model

• Experience with Scala or other JVM-based languages preferred

• Proven ability to learn new programming languages, and/or prior experience in a JVM-based and/or functional programming language

• Strong computer science fundamentals

• Open-source contributions 

We are committed to an inclusive and diverse Twitter. Twitter is an equal opportunity employer. We do not discriminate based on race, ethnicity, color, ancestry, national origin, religion, sex, sexual orientation, gender identity, age, disability, veteran status, genetic information, marital status or any other legally protected status. 

San Francisco applicants: Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.