Senior Software Engineer, (L3) Audiences & Journeys

Confirmed live in the last 24 hours

Twilio

Compensation

$141,520 - $208,000/year

Remote - US

Remote

Posted February 27, 2026

Job Description

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. That said, every hiring decision is made by real Twilions!

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

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