Principal Engineer at Twilio

You are a seasoned developer with over 12 years of experience building high-scale, cloud-native distributed systems. You possess deep proficiency in Java or Go

Work type: remote

Location: Remote - US

Salary: $188,240 – $235,300/yr

Type: Full-time

Summary

You are a seasoned developer with over 12 years of experience building high-scale, cloud-native distributed systems. You possess deep proficiency in Java or Go and are comfortable leading architectural strategy for mission-critical infrastructure. **What makes it worth a look...** Twilio is hiring a remote Principal Engineer for the US with pay ranging from $188,240 to $276,700 per year depending on your specific location. This is a high-level ownership role focused on modernizing a massive phone numbers platform using AI-driven workflows. **You might be a good fit if you...** * Have extensive production experience with AWS services like EKS, Lambda, and DynamoDB. * Regularly use LLMs or AI coding assistants to automate testing and architectural prototyping. * Can demonstrate a history of building high-volume public APIs and resilient microservices. * Are proficient with infrastructure as code tools such as Terraform and Kubernetes.

Job Description

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 ](https://customers.twilio.com/)and empower millions of developers worldwide to craft personalized customer experiences.

Our dedication to [remote-first work](https://www.twilio.com/en-us/blog/open-work), and strong culture of connection and global inclusion means that no matter your location, you’re part of a vibrant team with diverse experiences making a global impact each day. As we continue to revolutionize how the world interacts, we’re acquiring new skills and experiences that make work feel truly rewarding. Your career at Twilio is in your hands.

We use Artificial Intelligence (AI) to help make our hiring process efficient. That said, every hiring decision is made by real Twilions!

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See yourself at Twilio

Join the team as Twilio’s next Principal Engineer.

About the job

The Phone Numbers Platform is the heartbeat of Twilio. In 2026, "getting a phone number" is no longer a simple API call; it is a sophisticated orchestration of global inventory, real-time identity verification (KYC), and automated regulatory compliance.

As a Principal Engineer (P5), you will own the technical strategy for a platform that processes millions of requests. You will be expected to pioneer AI-driven development workflows using LLMs and agentic agents to accelerate code generation, automate architectural reviews, and synthesize complex global telecommunications regulations into executable logic. Your mission is to collapse the distance between a great idea and a production ready feature.

Responsibilities

In this role, you’ll:

• DRAW THE OWL: Lead the architecture and long-term technical roadmap for the Phone Numbers Platform, transitioning legacy systems into a modern, distributed microservices architecture that supports global scale.

• ACCELERATE WITH AI:Lead by example in using AI coding assistants (GitHub Copilot, Anthropic Claude, or internal LLMs) to automate boilerplate, generate exhaustive test suites, and perform rapid prototyping. You will be measured on your ability to amplify your own output and the team's velocity through AI augmentation.

• BE AN OWNER: Drive technical excellence across multiple teams, making critical architectural decisions that balance rapid feature innovation with world-class reliability and security.

• WEAR THE CUSTOMER’S SHOES: Partner with Product Managers to translate complex global telecommunications regulations and customer needs into elegant, developer-first APIs and application workflows.

• EMPOWER OTHERS: Mentor and uplift senior and staff engineers. Foster a culture of technical curiosity, ownership, and continuous learning. Teach the team how to move from "writing code" to "reviewing and orchestrating AI-generated logic" without sacrificing security or quality.

• RUTHLESSLY PRIORITIZE: Identify and mitigate technical risks early, ranging from scalability bottlenecks to security vulnerabilities and lead the team through complex production incidents with a focus on long-term remediation.

• WRITE IT DOWN: Communicate complex technical strategies to both executive leadership and engineering teams through high-quality design documents, RFCs, and presentations.

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:

• 12+ years of experience designing and developing highly available, high scale, secure, mission-critical cloud native enterprise distributed systems.

• Expert Proficiency in Java or Go, with deep knowledge of AWS ecosystems (Lambda, EKS, DynamoDB, Kafka).

• Architectural Mastery: Deep experience with cloud-native infrastructure (AWS preferred), microservices patterns, and designing "five-nines" (99.999%) resilient systems.

• AI-Native Workflow:Demonstrated experience using AI tools to significantly accelerate software delivery. You should be comfortable discussing how you use LLMs for architectural brainstorming, debugging, and code synthesis.

• API Excellence: A track record of building and maintaining high-volume public-facing APIs that focus on exceptional developer experience.

• Data Savvy: Experience with high-throughput data processing and storage solutions (SQL/NoSQL, Redis, Kafka, or Spark).

• Infrastructure as Code: Proficiency with Kubernetes, Terraform, and modern CI/CD paradigms.

• Leadership:Proven ability to influence technical strategy across multiple teams and organizational boundaries without direct authority.

• Telecom Domain Expertise: Experience with telephony protocols, local number porting (LNP), or global regulatory compliance frameworks.

• Platform Thinking: Experience building "internal platforms" that enable other developer teams to move faster.

• Agentic Systems:Experience building or integrating AI agents into internal developer platforms or automated ops workflows.

This role will be remote and based in the West Coast, USA including San Francisco Bay Area.

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.

Compensation:

The estimated pay ranges for this role are as follows:

• Based in Colorado, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, Vermont or Washington D.C. : $188,240.00 - $235,300.00.

• Based in New York, New Jersey, Washington State, or California (outside of the San Francisco Bay area): $199,280.00 - $249,100.00.

• Based in the San Francisco Bay area, California: $221,360.00 - $276,700.00.

• This role may be eligible to participate in Twilio’s equity plan and corporate bonus plan. All roles are generally eligible for the following benefits: health care insurance, 401(k) retirement account, paid sick time, paid personal time off, paid parental leave.

Application deadline information

Applications for this role are intended to be accepted until April 22nd, 2026, but may change based on business needs.

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](https://www.twilio.com/company/values). Additionally, we empower employees to build [positive change in their communities](https://twilio.org/support-and-resources/impact-fund) 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.](https://www.twilio.com/company/jobs#open-positions)

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