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Req # 100680

Senior Data Engineer, Core Data Engineering

San Francisco, CA US

Employee: Full Time Employee
Travel: None
About Castlight

At Castlight, our mission is to empower people to make the best choices for their health and to help companies make the most of their health benefits. We offer a health benefits platform that engages employees to make better healthcare decisions and can guide them to the right program, care, and provider. The platform also enables benefit leaders to communicate and measure their programs while driving employee engagement with targeted, relevant communications. 

Castlight is looking for seasoned data engineers who have a penchant for problem solving with a passion for innovation to join our core data engineering team. The ideal candidate for this position will specialize in writing data-driven applications. You must be comfortable dealing with large sets of imperfect data and designing scalable multi-tier systems to process it. As our data volume explodes, you will apply your deep knowledge of performance, scalability, and optimization to make appropriate recommendations, as well as help materialize them.


To succeed in this role, you'll need to be a versatile engineer. You must have an innate desire to build things 'the right way'.  You should be pain-averse - if some process or system isn't as streamlined as it could be, you'll want to fix it!  You should want to accelerate your career growth by taking on a role that will give you deep knowledge of a complex system, acting as the gatekeeper of the results. Finally, you should want to communicate and collaborate with a team of smart people just like you.


  • Participate in development efforts incorporating new data sources, as well as in support of infrastructure improvements
  • Provide architectural and technical leadership to improve and scale our existing data store capabilities
  • Enjoy working in a collaborative engineering team, writing code and the test cases to go with it
  • Participate in design discussions, sizing exercises, and code reviews
  • BS or MS in Engineering or Computer Science, or related technical field
  • 5+ years of experience in production software development, preferably in a SaaS environment
  • Experience handling complex data sources and large scale batch data infrastructure
  • Proficiency in writing SQL queries, performance tuning, and data modeling
  • Proficiency in Python, or another object-oriented programming language such as Ruby or Java
  • Experience working with very large data warehouses
  • Knowledge of PostgreSQL or GreenPlum a plus


We are Castlight and we are…


* Changing healthcare is a team sport

* Teamwork requires respect

* Direct feedback is a gift that improves us

* Diversity makes us stronger

* We take care of ourselves and each other=


* We put our mission first

* We are here to transform healthcare

* We tackle complex problems with curiosity, passion, and ambition

* We bring our best every day

* We learn and grow together


* Done well is better than perfect

* We move fast to accelerate execution and learning

* We are empowered to take action

* We own the outcome

* We win together

EEOC Statement
Castlight Health provides equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, pregnancy, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, Castlight Health will provide reasonable accommodations for qualified individuals with disabilities.
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