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Software Development Engineer

Twilio
Contract type
Ongoing
Work mode
Remote · Ireland
Experience
Mid-level · 2+ years

Job description

Software Engineer (L2) on Twilio's Voice Connectivity Trust team, building and operating real-time voice services so Twilio's Voice customers have reliable communication. The role covers the full software development life cycle, including on-call support, in a remote-first, distributed production environment.

At a glance

Employment
Full-time · Employee (employment agreement)
Work mode
Remote · Ireland

What you'll do

  • Design and implement real-time services with high throughput and low latency requirements, verify, deploy and operationalize them
  • Work closely with stakeholders to understand customer needs and devise and deliver simple, robust and scalable solutions
  • Express thoughts and ideas as detailed prose and use it to collaborate with leads, architects and cross functional teams
  • Embrace the challenge of scaling a complex distributed platform with points of presence globally, each concerned with high availability, high reliability, high throughput, low latency, and media fidelity
  • Figure out novel ways of solving customer problems for the Voice channel
  • Participate in all phases of the software development life cycle: requirements gathering with Product Managers, technical design, estimations, sprint planning, coding, testing, deployments and on-call support
  • Own, operate and maintain the team's services in a distributed production environment, employing Agile methodologies

What we're looking for

  • Minimum 2+ years of hands-on experience in a large scale, distributed applications environment on JVM based technologies
  • Experience building RESTful services, API design and event-driven architectures (Kafka, SQS)
  • Understanding of CI/CD pipelines
  • Hands on experience with cloud infrastructures such as AWS, GCP, OpenStack or Azure
  • Excellent written communication skills - essential for effective AI prompting and for creating clear technical documentation (with or without AI assistance)
  • Proven ability to critically evaluate AI-generated code for correctness, security, performance, and maintainability
  • Strong Java fundamentals with the ability to architect, review, and debug code whether written by you, teammates, or AI agents
  • Demonstrated proficiency working with AI coding assistants (Claude, GitHub Copilot, Cursor, or similar) - able to describe workflows and show examples
  • Bachelor's degree in Computer Science or a related engineering field
  • Strong Computer Science fundamentals not limited to data structures, algorithms, operating systems, and distributed systems
  • Able to work well in a team setting and both highly motivated and motivating

Nice to have

  • Experience with on-call rotations, incident response, monitoring/alerting tools (Prometheus, Datadog, Grafana)
  • Can demonstrate how you effectively use AI to deliver value efficiently
  • Experience scaling data tiers employing a variety of SQL/NoSQL database and caching technologies
  • Hands on experience scaling production backend systems, with the proven ability to design and develop horizontally-scalable, resilient and performing-under-load systems
  • Knowledge and experience working with SIP protocol
  • Knowledge and experience working with Stir/Shaken protocol

Your team

Voice Connectivity Trust

Team enabling Twilio to better support customers using Voice in their solutions.

Benefits

  • Competitive pay
  • Generous time-off
  • Ample parental and wellness leave
  • Healthcare
  • A retirement savings program
  • Support for volunteering and donation efforts

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About Twilio

Shaping the future of communications

Twilio delivers innovative solutions to hundreds of thousands of businesses and empowers millions of developers worldwide to craft personalized customer experiences. It is a remote-first company with a strong culture of connection and global inclusion.

Key facts

  • Communications technology
  • Remote-first company
  • Delivers solutions to hundreds of thousands of businesses
  • Empowers millions of developers worldwide
  • Uses AI to help make its hiring process efficient; every hiring decision is made by real Twilions
  • May ask employees to report in person on an ad-hoc basis for team gatherings, functional off-sites or customer meetings

What they value

  • Twilio Magic