Senior Software Engineer

Twilio Twilio · Enterprise · United Kingdom · Remote · Engineering

Senior Software Engineer to build and maintain large-scale backend services for Twilio's SDKs, focusing on reliability, availability, scalability, and performance. The role involves leading technical design, collaborating with stakeholders, championing engineering practices, and supporting customer issues. Experience with cloud-scale backend systems, Java/Scala, AWS, and distributed systems is required.

What you'd actually do

  1. Design, build, and maintain large-scale backend services with a focus on reliability, availability, scalability, and performance.
  2. Lead technical design efforts and ensure architecture decisions are well-documented and future-proof.
  3. Collaborate closely with senior engineers, product managers, and cross-functional stakeholders.
  4. Champion high-quality engineering practices, including automated testing, maintainable code, and thorough documentation.
  5. Own and continuously improve Twilio’s developer experience for SDK customers.

Skills

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

Nice to have

  • 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

What the JD emphasized

  • 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