• Develop and maintain Back-End functionalities using Python and AWS services • Build and optimize serverless functions (Lambda) • Create and integrate endpoints via API Gateway • Work with DynamoDB for read/write operations • Collaborate with the Front-End team to ensure proper API integration • Participate in Agile ceremonies, planning sessions, and estimations • Contribute to architectural improvements and code quality enhancements • Ensure security, scalability, and performance of the developed service

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 and empower millions of developers worldwide to craft personalized customer experiences. Our dedication to remote-first 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! . See yourself at Twilio Join the team as a Senior Software Engineer for Twilio Stytch team, where you'll shape the next generation of identity products. About the job As a Senior Backend Software Engineer you will help scale Stytch’s core product as we bring Stytch capabilities to Twilio’s full customer base, delivering secure, developer-first identity experiences. You’ll build backend systems that power authentication, authorization, and emerging agentic and non-human identity use cases. You’ll partner closely with product and engineering leadership to set direction, deliver high-impact features, and evolve our platform for Twilio’s scale. This is a rare chance to operate like a startup within Twilio: you’ll work in a high-ownership environment with startup speed, backed by Twilio’s reach and scale. Responsibilities - Build and own backend product capabilities for Stytch’s identity platform on Twilio—shipping new API surfaces and core authentication flows, including agentic and non-human identity use cases. - Design, implement, and maintain scalable, reliable distributed services, optimizing for security, latency, and developer experience. - Partner with Product and Engineering leadership to set direction, translate customer needs into technical plans, and deliver high-impact roadmap features. - Collaborate across Twilio and Stytch teams to align on architecture, integrate platform capabilities, and unblock cross-team initiatives. - Operate with deep technical ownership: author design docs, drive key technical decisions, review code, and stay close to the systems you ship. - Build in ambiguity—break down complex problems, make pragmatic tradeoffs, and adopt new technologies or strategies when they improve outcomes. - Improve production quality and resilience through strong observability, incident response and remediation. - Mentor and support other engineers through pairing, feedback, and knowledge-sharing, helping raise the team’s technical bar and culture. Qualifications 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: - 5+ years experience in designing, building and operating high-scale, mission critical cloud based production systems. - Familiarity with a production-grade code base in a modern programming language, applying best practice coding standards and writing high quality code. - Extensive experience with RESTful API design and development. - Bachelor’s degree in Computer Science or related industry experience. - Excellent written and verbal communication skills. - Schedule: ability to work non-standard, on-call rotation weekend and holiday hours. Desired: - Familiarity with Go, Kubernetes, and DynamoDB - Experience building developer tools and/or internal platforms that improve velocity and reliability. - Experience designing and building highly reliable back end systems - Builder at heart. Through a hobby or your profession, you are passionate about being hands on and seeing your work come to life. Location This role will be remote, but is not eligible to be hired in San Francisco, CA, Oakland, CA, San Jose, CA, or the surrounding areas. 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 *Please note the salary range information provided applies only to candidates residing in California, Colorado, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, New Jersey, New York, Vermont, Washington D.C., and Washington State due to local requirements. Compensation for candidates in other locations will be discussed during the hiring process. Please note that hiring for this role is not restricted to the locations listed above. The estimated pay ranges for this role are as follows: - Based in Colorado, Hawaii, Illinois, Maryland, Massachusetts, Minnesota, Vermont or Washington D.C. : $141,520 - 176,900. - Based in New York, New Jersey, Washington State, or California (outside of the San Francisco Bay area): $149,840 - 187,300. - Based in the San Francisco Bay area, California: $166,400 - 208,000. - 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. The successful candidate’s starting salary will be determined based on permissible, non-discriminatory factors such as skills, experience, and geographic location. Applications for this role are intended to be accepted until March 30 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. Additionally, we empower employees to build positive change in their communities 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. Twilio is proud to be an equal opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state and local law. Qualified applicants with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Additionally, Twilio participates in the E-Verify program in certain locations, as required by law.

• Develop, maintain, and enhance applications using ASP.NET Web Forms with code‑behind architecture. • Write clean, high‑quality, and efficient C# code following industry best practices. • Build and optimize SQL database solutions, including stored procedures, queries, and database designs. • Work with Telerik UI for ASP.NET AJAX to develop intuitive and dynamic user interfaces. • Develop applications using n‑Tier architecture, ensuring strong separation of concerns and maintainability. • Consume and integrate various APIs, including REST, SOAP, and callback‑based patterns. • Create, manage, and optimize reports using SQL Server Reporting Services (SSRS). • Manage and configure Microsoft Internet Information Services (IIS) for deployments, environments, and troubleshooting. • Collaborate with cross‑functional teams to translate business requirements into technical solutions.

• Contribute to the development and modernization of cloud-based applications built with Node.js and React • Play an important role in migrating existing services and APIs from Express.js to NestJS • Ensure the reliability of AWS-based workflows and microservices