Software Engineer, L2 id-9347

May 23, 2025

Twilio powers real-time business communications and data solutions that help companies and developers worldwide build better applications and customer experiences.

Although we're headquartered in San Francisco, we have presence throughout South America, Europe, Asia and Australia. We're on a journey to becoming a global company that actively opposes racism and all forms of oppression and bias. At Twilio, we support diversity, equity & inclusion wherever we do business.

About the job

Twilio's Phone Numbers team underpins the Programmable Communications Products. For many of our customers, their first interaction with Twilio is through acquiring and using a phone number. This team is responsible for the systems that power Twilio’s Global Inventory.

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As a Software Engineer, L2, you'll be designing small features and working alongside talented engineers to build and deploy the next generation of our distributed systems and microservices architecture. You will work closely with Product and Design and be responsible for building low latency, highly scalable APIs.

We're looking for a backend engineer to join us as we begin the next stage of Phone Numbers at Twilio, pushing forward the entire industry in the process

Responsibilities

In this role, you’ll:

Write clean, efficient, and maintainable code for our distributed systems and microservices, utilizing asynchronous communication patterns for optimal performance. Contribute to the design and implementation of highly scalable architectures, prioritizing reliability, performance, and future-proof growth.

Collaborate in defining and monitoring key Service Level Objectives (SLOs) and Service Level Indicators (SLIs) to ensure our systems deliver exceptional user experiences.

Be an active participant in the migration and optimization of our tech stack to leverage the modern technologies, ensuring future-proof scalability and agility while maintaining backward compatibility.

Learn and grow with your colleagues, actively participating in code reviews, knowledge-sharing initiatives, and mentoring junior engineers.

Partner effectively with cross-functional teams, bridging the gap between technical vision and business goals. Excellent communication and collaboration skills, able to articulate complex technical concepts to both technical and non-technical audiences. Create clear and concise technical documentation, including design decisions, architecture diagrams, and best practices, for future reference and knowledge sharing.

Participate in an on-call rotation and ensure timely response to production incidents and system outages. Collaborate in blameless postmortems for production incidents, focusing on root cause analysis, learning opportunities, and actionable improvement plans.

Qualifications

Not all applicants will have skills that match a job description exactly. Twilio values diverse experiences in other industries, and we encourage everyone who meets the required qualifications to apply. While having “desired” qualifications make for a strong candidate, we encourage applicants with alternative experiences to also 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:

2+ years of experience with a proven track record of building, and deploying large, scalable distributed systems and microservices architectures.

2+ years of experience in Java, including advanced concepts like concurrency and threading

2+ years of experience with a strong understanding of relational databases like MySQL, including query optimization and data modeling principles.

Practical experience with cloud platforms like AWS

Excellent written and verbal communication and collaboration skills, able to articulate complex technical concepts to both technical and non-technical audiences. A healthy ability to manage and resolve conflict - you have the ability to listen, present, and question effectively

Passion for continuous learning and staying ahead of the curve with new technologies.

Bachelor's degree in Computer Science (or equivalent)

Desired:

Prior experience working with PHP and Knowledge of modern front-end technologies such as React, Typescript, Node.js, or equivalent frameworks is a plus

Experience in utilizing asynchronous communication patterns like Kafka or similar tools to achieve optimal performance and decoupling.

Experience being oncall for production systems.

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