Senior Software Engineer (L3)

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.

As a Senior Software Engineer (L3), you will be a key technical contributor driving the feature design, execution, and operational health of platform services that process millions of requests. You will build scalable, high-performance solutions while working closely with engineering partners across Twilio to ensure alignment.

Responsibilities:

• Contribute significantly to the technical design and roadmap for core platform components, authoring technical specifications and driving execution to transition legacy systems into modern, scalable cloud-native microservices.
• Actively leverage AI coding assistants to automate boilerplate, generate comprehensive test suites, and rapidly prototype solutions.
• Drive technical excellence and end-to-end component ownership within your team, making sound technical decisions that balance rapid feature delivery with system reliability, security, and technical debt reduction.
• Partner with Product Managers and cross-functional stakeholders to translate customer needs and regulatory requirements into precise technical specifications, developer-first APIs, and seamless application workflows.
• Mentor and uplift junior engineers, onboard new team members, and foster a collaborative environment through constructive code reviews, tech talks, and technical guidance.
• Proactively identify and resolve technical risks, performance bottlenecks, and security vulnerabilities within team services.
• Articulate technical designs, system trade-offs, and operational runbooks clearly to your team and cross-functional partners through high-quality design documents, RFCs, and thorough documentation.

Qualifications:

• 5+ years of experience designing and developing highly available, high-scale, secure, mission-critical cloud-native enterprise distributed systems.
• Strong Proficiency in Java or Go, with solid knowledge of AWS ecosystems (Lambda, EKS, DynamoDB, Kafka).
• Cloud-Native Architecture: Hands-on experience with cloud-native infrastructure (AWS preferred), microservices patterns, and building highly resilient systems.
• AI-Augmented Development: Practical experience using AI tools to accelerate software delivery.
• API Design: Experience building and maintaining high-volume public-facing APIs with a focus on developer experience.
• Data Proficiency: Experience with high-throughput data processing and storage solutions (SQL/NoSQL, Redis, Kafka, or Spark).
• Infrastructure as Code: Familiarity with Kubernetes, Terraform, and modern CI/CD paradigms.
• Collaboration & Influence: Demonstrated ability to influence technical decisions within your team through strong communication and technical credibility.

Benefits:

• Competitive pay
• Generous time off
• Ample parental and wellness leave
• Healthcare
• Retirement savings program
• Much more

Compensation:

• 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 - $176,900.00
• Based in New York, New Jersey, Washington State, or California (outside of the San Francisco Bay area): $149,840.00 - $187,300.00
• Based in the San Francisco Bay area, California: $166,400.00 - $208,000.00