Senior Software Engineer - Machine Learning

Optimizely, San Francisco CA, US

Optimizely is the world's leading experience optimization platform.

The Opportunity

At Optimizely, we have built the world’s first Experimentation Platform that enables Testing and Personalization across all channels such as Web, Mobile, Server-side, and OTT through core components such as Analytics, Targeting, and Recommendations.


Our teams have built sophisticated infrastructure that processes billions of events per day, enriches them via stream processing, aggregates and stores them efficiently, supports large scale performant queries, and serves targeting information and recommendations in real-time. Our engineers speak at conferences, write blog posts to share their work, and contribute back to open-source projects.


We are looking for a talented engineer to help us build machine learning features and products to automate our customers’ journeys through complex experimentation hypotheses and analyses.  This is a unique opportunity to work on a small team and own a large part of Optimizely’s machine learning strategy. Our core challenges are to build the right set of features that enable 1:1 personalization and automated optimization for our customers.

Your Role

  • You will work on machine learning features and products such as Recommendations, Audience Discovery, User Scoring and Prediction, and Automated Optimization

  • You will build Prediction Services that rely on offline and online data integration, appropriate feature selection, and model training

  • You will build systems and services using batch and stream processing spanning technologies such as Hadoop, Samza, and Spark in languages such as Java and Scala

  • You will understand the scalability and performance tradeoffs among various ML techniques and appropriately build ML systems as we move from prototype to production

  • You will coordinate and work with other application product teams to implement Machine Learning features end to end throughout our platform

Your Background

  • You have strong fundamentals in Computer Science, especially algorithms and datastructures, are an expert in at least one of Java, Scala, Python, or C++, and are comfortable working with JavaScript

  • You have practical machine learning experience that allows you to develop sound approaches for problems such as contextual decision making, clustering, content targeting and optimization, ranking, prediction, and classification

  • You have experience with distributed systems to adapt machine learning approaches from simulation to prototypes to production; in particular you have hands-on  experience with at least some of following: Hadoop, Samza, Spark, HBase, SQL DBs

  • You have 3 to 5 years of experience doing this and are looking for your next big challenge

If you're interested in the why's and how's please check out these additional links:


  • Medical insurance premiums covered at 100% for employee and dependents with very low co-pay and deductible. HMO, PPO, and HSA options available
  • Full dental coverage including orthodontics
  • Full vision coverage including contacts
  • Wellness Grant
  • Commuter and transportation benefits
  • Catered in-office lunch and dinner on weekdays
  • Unlimited vacation policy and seventeen weeks of paid parental leave
  • 401k benefit
  • Working with a great team and having a huge impact!

At Optimizely, we embody inclusion and embrace diversity. Optimizely is an equal opportunity employer and makes employment decisions on the basis of merit.  Optimizely prohibits discrimination based on race, color, religion, sex, sexual identity, gender identity, marital status, veteran status, nationality, citizenship, age, disability, medical condition, pregnancy, or any other unlawful consideration. All your information will be kept confidential according to EEO guidelines.

About Optimizely

About Us

Optimizely is the world’s leading experimentation platform, enabling businesses to deliver continuous experimentation and personalization across websites, mobile apps and connected devices. Optimizely enables businesses to experiment deeply into their technology stack and broadly across the entire customer experience.

The platform’s ease of use and speed of deployment empower organizations to create and run bold experiments that help them make data-driven decisions and grow faster. To date, marketers, developers and product managers have delivered over 700 billion experiences tailored to the needs of their customers.

At Optimizely, continuous experimentation isn’t a product, it’s our DNA. It’s why we never stop trying new things and pushing ourselves to deliver for you. The way we see it, you’re the expert on your customers and your business. It’s our job to help you stay that way, getting sharper every day and turning even the most commonplace interactions into opportunities to learn and grow.

Because the most successful businesses aren’t the ones with all the answers. They’re the ones that keep asking the big questions.

Want to learn more about Optimizely? Visit Optimizely's website.