Senior Software Engineer

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.

About the job This position is needed to deliver the best-in-class Twilio SDK experience for our customers. Twilio’s SDK engineering team builds robust, powerful SDKs and a GraphQL layer to enable developers build their own Contact Center UIs and real-time AI Contact Center products. Many other teams rely on integrating and exposing their services via the Unified SDK layer to deliver their advanced features to our customers. The position is especially critical in supporting Twilio’s expansion and will be central to creating a core product that provides leverage to all of Twilio’s Flex Contact Center and engineering teams!

Responsibilities In this role, you’ll:

• Design, build, and maintain large-scale backend services with a focus on reliability, availability, scalability, and performance.
• Lead technical design efforts and ensure architecture decisions are well-documented and future-proof.
• Collaborate closely with senior engineers, product managers, and cross-functional stakeholders.
• Champion high-quality engineering practices, including automated testing, maintainable code, and thorough documentation.
• Own and continuously improve Twilio’s developer experience for SDK customers.
• Support customers by troubleshooting issues and promoting backend and SDK best practices.
• Contribute to operational excellence by maintaining a high reliability bar and participating in incident response and system improvements.

Qualifications Twilio values diverse experiences from all kinds of industries, and we encourage everyone who meets the required qualifications to 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:

• Bachelor’s/Master’s in Computer Science, Engineering, or related field.
• 5+ years of experience building and operating cloud-scale backend systems.
• Strong programming skills in backend languages such as Java or Scala.
• Experience authoring technical specifications and delivering end-to-end system designs.
• Strong fundamentals in concurrency and distributed systems.
• Experience working with AWS or other cloud platforms at scale.
• Proven ability to maintain a high operational excellence bar and mentor junior engineers on reliability and maintainability.
• Strong communication skills and the ability to thrive in collaborative, fast-moving teams.

Desired:

• Excellent problem-solving and critical thinking skills.
• Any prior experience building SDKs and GraphQL BFF layer is an added advantage.
• Ability to establish backend engineering guidelines and represent the team within the broader Twilio engineering organization.
• Passion for delivering high-quality products and continuously learning new technologies.
• Strong sense of ownership and accountability.
• Comfortable navigating ambiguity and driving clarity in evolving environments.

Location This role will be remote and based in the UK.

Travel We prioritize connection and opportunities to build relationships with our customers and each other. For this role, you may be required to travel occasionally to participate in project or team in-person meetings.

What We Offer Working at Twilio offers many benefits, including competitive pay, 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. 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.