Principal Software Engineer - Email Infrastructure Stats

Irvine, California, United States

Full Time Senior-level / Expert USD 127K - 182K
Twilio logo


With Twilio, unite communications and strengthen customer relationships across your business – from marketing and sales to customer service and operations.

View all employer listings

Apply now Apply later

See yourself at Twilio

Join the team as our next Principal Software Engineer (Email), Irvine, CA/Remote

Who we are & why we’re hiring

Twilio powers real-time business communications and data solutions that help companies and developers worldwide build better applications and customer experiences.

Although we're headquartered in San Francisco, we're on a journey to becoming a globally antiracist company that supports diversity, equity & inclusion wherever we do business. We employ thousands of Twilions worldwide, and we're looking for more builders, creators, and visionaries to help fuel our growth momentum.

About the job

This position is needed to fulfill the critical role of a Principal Software Engineer within Twilio Sendgrid, to be both hands-on as well as a thought leader in creating, deploying and managing highly available, very large scale distributed systems.

We produce 18 billion+ events/day!  This role will help re architect existing systems struggling to scale as well as contribute in building additional new product offerings that provide deep insights around the health of our customer's email program. 


In this role, you’ll:

  • Be An Owner: Contribute in drawing out 1+ year technical strategy for the team. How will you develop a culture of personal and team growth that encourages your team members to work together to achieve great outcomes?
  • Empower Others: Help the team by sharing your knowledge and experience, in solving complex challenges. Actively remove oneself as a single point of failure.
  • Ruthlessly Prioritize: Advocates for balancing between tech debt and feature development by collaborating with engineering and product. 
  • Wear The Customer's Shoes: Ship reliable features, at scale, that deliver the most value to your customers. You will partner with engineering and product to understand customers’ challenges, see opportunities, craft solutions, and lead the team to deliver the right value. 
  • Be Bold: Embrace calculated risks, while understanding the tradeoffs between technology choices.
  • Be Inclusive: Collaborate with a diverse group of people with different backgrounds. 



Not all applicants will have skills that match a job description exactly. Twilio values diverse experiences in other industries, and we encourage everyone who meets the required qualifications to apply. While having “desired” qualifications make for a strong candidate, we encourage applicants with alternative experiences to also apply. If your career is just starting or hasn't followed a traditional path, don't let that stop you from considering Twilio. We are always looking for people who will bring something new to the table!


  • To comply with Executive Order 14042, all Twilio employees working in the U.S. are required to submit proof of vaccination for COVID-19 unless they qualify for a medical or religious accommodation / exemption.  Employees onboarded after January 4, 2022 must submit proof of vaccination or receive approval for an exemption prior to their Twilio start date. 
  • 10+ years of relevant experience building highly available, scalable, fault tolerant and maintainable distributed systems. They should have learned enough lessons the hard way that they’re able to share them with others.
  • Excellent written and spoken communication skills.  Ability to articulate and present vision to both technical and non technical stakeholders.
  • Operational excellence focussed: Understands value of monitoring with metrics and alerting. Knows how to build resilient systems that are maintainable for years to come.  
  • Deep understanding of sql and distributed databases like ScyllaDB, Clickhouse, Dynamodb, Snowflake, Cassandra, MySQL
  • Understands importance of availability and reliability; has had their own share of painful outages. 
  • Strong experience with Golang or Python
  • Experience working with event streaming platforms like Kafka, Kinesis
  • Strong technical and leadership chops - Led technical decisions for your team and influenced technical decisions across your functional domains on large scale projects. Led initiatives/projects that enforce operational reliability factors such as monitoring, performance and capacity planning, security, and disaster response.


  • A passion for automation with DevOps or SRE background; blending operational excellence with development best practices.
  • Experience with container orchestration and other technologies:Kubernetes, Redis, Buildkite, Chef
  • Experience with REST API design and implementation.
  • Experience with AWS, GCP or other public cloud infrastructure platforms
  • Experience with email at high scale 
  • Bachelor’s or Master’s degree in Computer Science or related industry experience

This role will be based in our Irvine, CA office. 

This role will be open to US remote as well.

What We Offer

There are many benefits to working at Twilio, including, in addition to competitive pay, things like generous time-off, ample parental and wellness leave, healthcare, a retirement savings program, and much more. Offerings vary by location.

Twilio thinks big. Do you?

We like to solve problems, take initiative, pitch in when needed, and are always up for trying new things. That's why we seek out colleagues who embody our values — something we call Twilio Magic. Additionally, we empower employees to build positive change in their communities by supporting their volunteering and donation efforts.

So, if you're ready to unleash your full potential, do your best work, and be the best version of yourself, apply now!

If this role isn't what you're looking for, please consider other open positions.

(Location dependent information)

Colorado applicants: 

  • The estimated pay range for this role, based in Colorado, is $127,960 - $182,800 
  • Sales Commission: Additionally, this role is eligible to earn commissions and eligible to participate in Twilio's equity plan.
  • Non-Sales: Additionally, this role is eligible to participate in Twilio's equity plan.

The successful candidate’s starting salary will be determined based on permissible, non-discriminatory factors such as skills, experience, and geographic location within the state. This role is also eligible to participate in Twilio’s equity plan and for the following benefits: health care insurance, 401(k) retirement account, paid sick time, paid personal time off, paid parental leave.


Job region(s): North America
Job stats:  2  0  0
  • Share this job via
  • or

Explore more DevOps, Cloud and Digital Infrastructure career opportunities