Senior Software Engineer, L3

Twilio

Senior Software Engineer building Twilio’s phone-number and KYC compliance platforms. Designing cloud-native microservices, APIs, and AI-augmented tools at massive scale.

Posted 8/4/2026full-timeRemote • Colorado, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, New Jersey, New York, Vermont, Washington • 🇺🇸 United StatesSenior💰 $141,520 - $208,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and developing cloud-native microservices and enterprise distributed systems, with a strong focus on high availability, security, and performance. Proficient in leveraging AI tools for coding assistance and mentoring junior engineers while effectively collaborating with cross-functional teams.

Highest-signal resume keywords

Cloud-Native Microservices DevelopmentJava or Go ProficiencyAWS Ecosystem KnowledgeAI Tools ExperienceHigh-Volume API Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Cloud-Native InfrastructureDistributed Systems DesignHigh-Throughput Data ProcessingSQL/NoSQLKubernetesTerraformCI/CD ParadigmsPerformance OptimizationSecurity Vulnerability ResolutionTechnical Specification Authoring

Soft Skills

MentoringTechnical GuidanceStrong Communication

Tools & Technologies

AWS LambdaAWS EKSAWS DynamoDBKafkaRedisSparkAI Coding Assistants

Industry Keywords

Microservices PatternsScalable SystemsTechnical Debt ManagementIncident ResolutionOperational Runbooks

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsDynamoDBGoJavaKafkaKubernetesMicroservicesNoSQLRedisSparkSQLTerraform

About the role

Key responsibilities & impact

Contribute to technical design and roadmaps for core platform components
Author technical specifications and drive legacy-system transitions to scalable cloud-native microservices
Use AI coding assistants to automate boilerplate, generate test suites, and prototype solutions
Own end-to-end components and make decisions balancing feature delivery, reliability, security, and technical debt
Partner with Product Managers and cross-functional stakeholders to translate customer and regulatory needs into technical specifications, APIs, and workflows
Mentor junior engineers, onboard team members, conduct code reviews, deliver tech talks, and provide technical guidance
Identify and resolve technical risks, performance bottlenecks, and security vulnerabilities
Own on-call responsibilities, resolve incidents, and implement root-cause remediation
Document technical designs, system trade-offs, operational runbooks, RFCs, and related documentation
Build scalable, high-performance platform services processing millions of requests

Requirements

What you’ll need

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
Solid knowledge of AWS ecosystems, including Lambda, EKS, DynamoDB, and Kafka
Hands-on experience with cloud-native infrastructure, microservices patterns, and highly resilient systems
Practical experience using AI tools such as Copilot, Claude, or Cursor for debugging, code synthesis, and prototyping
Experience building and maintaining high-volume public-facing APIs focused on developer experience
Experience with high-throughput data processing and storage solutions such as SQL/NoSQL, Redis, Kafka, or Spark
Familiarity with Kubernetes, Terraform, and modern CI/CD paradigms
Ability to influence technical decisions through strong communication and technical credibility

Benefits

Comp & perks

Competitive pay
Generous time off
Ample parental and wellness leave
Healthcare insurance
401(k) retirement account
Paid sick time
Paid personal time off
Paid parental leave
May be eligible for Twilio’s equity plan
May be eligible for Twilio’s corporate bonus plan
Volunteering and donation support