Senior Software Engineer, (L3) Audiences & Journeys

Who we are 

At Twilio, we’re shaping the future of communications, all from the comfort of our homes. We deliver innovative solutions to hundreds of thousands of businesses and empower millions of developers worldwide to craft personalized customer experiences.

Our dedication to remote-first work, and strong culture of connection and global inclusion means that no matter your location, you’re part of a vibrant team with diverse experiences making a global impact each day. As we continue to revolutionize how the world interacts, we’re acquiring new skills and experiences that make work feel truly rewarding. Your career at Twilio is in your hands.

We use Artificial Intelligence (AI) to help make our hiring process efficient, fair, and transparent, but automation never makes the final call. Every hiring decision is made by real Twilions, ensuring a human touch at every step.

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See yourself at Twilio Join the team as our next Software Engineer - Audiences & Journeys   About the job Segment is a best-in-class customer data platform (CDP) designed with engineers, marketers, and product managers in mind. We’re excited to work at the cutting edge of data and artificial intelligence, such as with our AI-Assisted Suggest Mappings product. And, we move a lot of data - over 12 trillion API calls a year.   This position is needed to build and scale APIs to enable Twilio developers to unlock best-in-class personalized customer experiences through the Twilio Audiences & Journeys products. As a Software Engineer on the team, you will collaborate closely with product management, architecture, and other engineering teams to design APIs, identify performance bottlenecks, and data models, and drive system-level improvements that enhance both developer velocity and customer experience. You’ll be expected to evaluate and communicate trade-offs between feature velocity, system stability, and technical debt, and help drive architectural decisions that ensure long-term sustainability and performance.   We iterate quickly on these products and features and learn new things daily — all while writing quality code using the latest AI tools. We work closely with product and design and solve some of the toughest engineering problems to unlock new possibilities for our customers. If you get excited by building products with high customer impact — this is the place for you.   Responsibilities In this role, you’ll:
- Design and build robust, scalable backend systems and APIs that power audience & journey creation, segmentation, and activation across Segment’s data platform.
- Collaborate cross-functionally with design, product, and other engineers to define solutions that balance usability, performance, and long-term architecture.
- Communicate technical decisions clearly - articulating trade-offs, customer impact, and team alignment.
- Mentor junior engineers and contribute to a culture of technical excellence and continuous learning.
- Troubleshoot and improve system reliability, debugging issues and refining operational tooling and processes.
- Participate in an on-call rotation for our managed services
  Qualifications  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!   Required:
- 5-10 years experience writing production-grade code in a modern programming language
- Experience programming in one or more of the following: Go, Java, Python, or similar languages
- Experience operating large-scale, distributed systems on top of cloud infrastructure such as Amazon Web Services (AWS) 
- Have hands-on experience with container orchestration frameworks (e.g. Kubernetes, EKS, ECS)
- Have experience with large scale async processing systems
- Experience shipping services (products) following CI/CD development paradigm.
- Good grasp of software engineering and how to build a system in scalable and extensive manner;
- Excellent written and verbal technical communication skills to convey complex technical concepts effectively.
- Comfortable asking questions and taking initiative to solve problems where it is often necessary to “draw the owl”
- Leverage best-in-class development productivity practices including AI tooling
  Location: This role will be remote, but is not eligible to be hired in CA, CT, NJ, NY, PA, WA.
- No mandatory travel is anticipated.
  Compensation: \*Please note this role is open to candidates outside of California, Colorado, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, New Jersey, New York, Vermont, Washington D.C., and Washington State. The information below is provided for candidates hired in those locations only.   The estimated pay ranges for this role are as follows:
- Based in Colorado, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, Vermont or Washington D.C. $141,520.00 to $176,900.00
- Based in New York, New Jersey, Washington State, or California (outside of the San Francisco Bay area): $149,840.00 to $187,300.00.
- Based in the San Francisco Bay area, California: $166,400.00 to $208,000.00.
  This role may be eligible to participate in Twilio’s equity plan and corporate bonus plan. All roles are generally eligible for the following benefits: health care insurance, 401(k) retirement account, paid sick time, paid personal time off, paid parental leave. The successful candidate’s starting salary will be determined based on permissible, non-discriminatory factors such as skills, experience, and geographic location.   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.   Applications for this role are intended to be accepted until 2/23/2026, but may change based on business needs.

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.

Twilio is proud to be an equal opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state and local law. Qualified applicants with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Additionally, Twilio participates in the E-Verify program in certain locations, as required by law.