Senior Machine Learning Engineer

Twilio

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 Twilio's next Senior or Staff Applied Software Research Engineer for Emerging Technologies. We are hiring for multiple positions at either a Senior or Staff level.  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. Welcome to Twilio Forward, the incubation lab where we push boundaries, unlock next-era growth, and turn the once-unimagined into reality. As part of our Emerging Tech team, you will pioneer Horizon-3 initiatives that fundamentally redefine how humanity interacts with artificial intelligence. From launching Ola, the world’s first agent-native communication channel, to engineering the ground-breaking Agent-to-Human (A2H) protocol, we are actively building the control room for the autonomous future. If you are a builder driven to disrupt the status quo, reimagine what’s possible, and engineer what comes next, your journey starts here. About the job This full-stack engineer position is needed to contribute hands-on technical expertise, collaborate on rapid prototyping, and develop innovative solutions as part of Twilio’s incubation team.  As a Senior Applied Software Research Engineer, you’ll build hands-on skills with new technologies, collaborate with passionate engineers, and contribute to delivering solutions that help shape Twilio’s future offerings. This is a growth role, ideal for someone eager to learn and make a measurable difference in a fast-paced, entrepreneurial environment. As a Staff Applied Software Research Engineer, you’ll work closely with cross-functional partners to design and build new product ideas, leveraging modern technologies and your problem-solving abilities. This is a high-impact opportunity for growth and learning, helping Twilio experiment and stay ahead in the evolving tech landscape. Responsibilities In this role, At the Senior level, you’ll: * Develop, test, and deploy code for prototypes and new product features. * Collaborate with team members to solve technical challenges and improve solution design. * Participate in code reviews, documentation, and team knowledge sharing. * Experiment with modern tools, frameworks, and emerging technologies. * Adapt to evolving requirements and provide input on process improvements. In this role, At the Staff level, you’ll: * Design, develop, and implement prototypes and production-ready solutions. * Collaborate with team members to experiment with AI, machine learning, and emerging technologies. * Participate in code reviews and contribute to continuous improvement of engineering best practices. * Communicate progress and technical concepts to stakeholders and peers. * Adapt quickly to feedback and changing requirements in a fast-paced environment. 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: At the Senior level: * Bachelor’s degree in Computer Science, Engineering, or equivalent practical experience. * 3+ years of professional software development experience, ideally full stack development. * Proficiency in at least one programming language (such as JavaScript, Python, or Java). * Experience working with front-end (React, Angular) and/or back-end (Node.js, Springboot) technologies. * Understanding of database fundamentals (SQL or NoSQL). * Eagerness to learn, collaborate, and solve problems. * Effective written and verbal communication skills. * Have an agentic coding operating model that is effective at leveraging skills/ MCP/ LLMs to be able to do ai-assisted coding * Ability to deal with ambiguity and solve the problems vs. need constant support to unblock execution At the Staff level: * Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent experience. * 5+ years of professional full stack software development experience. * Proficiency across modern programming languages such as JavaScript, Python, or Java. * Experience building applications using front-end (React, Angular) and/or back-end (Node.js, Springboot) frameworks. * Solid understanding of database technologies (SQL or NoSQL). * Strong problem-solving skills and a collaborative mindset. * Effective communication skills for technical discussions. * Next-Gen Workflow: Mastery of an agentic coding operating model; highly effective at leveraging advanced dev tools, Model Context Protocol (MCP), and LLMs to drastically accelerate AI-assisted development. * Ability to deal with ambiguity and solve the problems vs. need constant support to unblock execution Desired: At the Senior & Staff level: * Exposure to AI or machine learning principles or projects. * Knowledge of cloud-based platforms (AWS, Azure) and distributed systems. * Ability to ramp up on new technologies, solution against well defined problems and to be iterative about building. * Passion for innovation and exploring emerging technologies. * Experience working in remote or globally distributed teams. * Contributions to open source or tech community projects. Location   All Senior and Staff roles will be remote and based in the United States.   Travel  We prioritize connection and opportunities to build relationships with our customers and each other. For this role, approximately 5% travel is anticipated to help you connect in-person in a meaningful way.    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. : $141,520.00 - $213,900.00. * Based in New York, New Jersey, Washington State, or California (outside of the San Francisco Bay area): $149,840.00 - $226,500.00. * Based in the San Francisco Bay area, California: $166,400.00 - $251.600.00. * 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. The successful candidate’s starting salary will be determined based on permissible, non-discriminatory factors such as skills, experience, and geographic location.   Application deadline information    Applications for this role will be accepted on an ongoing basis. 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.

Calendly

WHAT’S IN IT FOR YOU?  Ready to make a serious impact? Millions of people already rely on Calendly, and we’re still in the midst of exciting product growth — it’s a fantastic time to join us. Everything you’ll work on here will accelerate your career to the next level. If you want to learn, grow, and do the best work of your life alongside the best people you’ve ever worked with, then we hope you’ll consider allowing Calendly to be a part of your professional journey. ABOUT THE TEAM & OPPORTUNITY  What’s so great about working on Calendly’s Engineering team?  We make things possible for our customers through impactful innovation. Why do we need you? We're seeking a Senior Engineering Manager for our Data Platform with deep expertise in people leadership, technical delivery, and organizational development. This role sits at the core of our Data, AI, and Infrastructure organization. Reporting directly to the VP of Data, you'll own the development and expansion of the infrastructure and data platforms that enable all Calendly teams to leverage and rely on trusted data. Your work will enable a best-in-class scheduling experience and help millions of users host better meetings. A DAY IN THE LIFE OF AN ENGINEERING MANAGER AT CALENDLY As a Senior Manager, Data Platform, you will have the opportunity to lead the strategy, execution, and evolution of Calendly’s modern data platform. This leader will oversee the systems, architecture, and engineering practices that enable reliable, scalable, secure, and self-service access to data across the company. This is a highly cross-functional leadership role that partners closely with various product Engineering teams, Product management, product Analytics, Security, Infrastructure and AI/ML teams.  This position spans Data Engineering and Analytics Engineering functions - maintaining technical excellence and uniformity across our services. Your team will manage our Enterprise Data Warehouse - collecting, processing, and overseeing data that drives analytics, operations, and strategic decisions throughout the organization. In addition to the internal warehouse, you'll also oversee Calendly's near-real-time data systems that serve millions of users each day. This requires close collaboration with product engineering teams and internal analytics groups to grasp their requirements, explore their specific scenarios, and genuinely comprehend what drives their success. Ideal candidates provide direction amid uncertainty and can independently investigate and identify solutions. If selected for this position, you'll own the mentoring, development, and strategic planning for your team's growth. At Calendly, you'll have the chance to significantly influence the quality and evolution of a product used by millions. ON A TYPICAL DAY, YOU WILL BE WORKING ON: * Define and execute the long-term strategy for Calendly’s data platform and ecosystem. * Build a scalable, reliable, and cost-efficient platform that supports analytics, experimentation, operational reporting, machine learning, and AI use cases. * Drive modernization initiatives across data ingestion, transformation, orchestration, governance, observability, and serving layers. * Build internal platform capabilities that empower analysts, data scientists, ML engineers, and product teams. * Improve data discoverability, governance, lineage, and quality. * Drive adoption of self-service tooling and standardized workflows. * Recruit engineers and people leaders to expand both new and existing teams across the organization, with responsibility for all hires joining the squad * Address challenges that accelerate progress for the entire engineering organization * Guide, develop, and integrate new engineering team members * Drive the professional growth, engagement, and performance of engineers on your team * Guarantee the systems under your team's ownership are performing effectively, meeting service level commitments, and prepared to scale * Anticipate upcoming technical requirements and develop strategies to address them * Deliver feedback and direction to support our continuous growth and expansion WHAT DO WE NEED FROM YOU? * 7+ years experience leading a data and analytics engineering teams * 10+ years of overall development - especially relating to Data Platforms and Products (SQL, Python, Java, Scala, or strongly typed languages preferred) * Strong understanding of Data warehousing, Batch and streaming data pipelines, Data orchestration and workflow management, Data modeling and transformation frameworks, Metadata, lineage, and governance systems, Data observability and reliability practices * Ability to balance technical excellence with business outcomes. Strong systems thinking and prioritization skills. * Deep proficiency with data application development and building scalable architecture for enterprise grade data warehouses and streaming engines * Ability to be a hands on contributor when need be with a focus on enablement * Experience planning and leading development efforts on large projects * Previous experience leading and mentoring teams and driving them toward big goals with consistent execution * You are an excellent communicator who can succinctly explain deep technical concepts * Experience leading Agile/Scrum ceremonies * Previous experience working within a balanced engineering and product team * Authorized to work lawfully in the United States of America as Calendly does not engage in immigration sponsorship at this time Tier 1 Salary Hiring Range $268,260—$325,068 USD Tier 2 Salary Hiring Range $245,905—$297,979 USD Tier 3 Salary Hiring Range $223,550—$270,890 USD The ranges listed above are the expected annual base salary for this role, subject to change. Calendly takes a number of factors into consideration when determining an employee’s starting salary, including relevant experience, relevant skills sets, interview performance, location/metropolitan area, and internal pay equity. Base salary is just one component of Calendly’s total rewards package. All full-time (30 hours/week) employees are also eligible for our Top Performer Bonus program (or Sales incentive), equity awards, and competitive benefits. Calendly uses the zip code of an employee’s remote work location, or the onsite building location if hybrid, to determine which metropolitan pay range we use. Current geographic zones are as follows: * Tier 1: San Francisco, CA, San Jose, CA, New York City, NY * Tier 2: Chicago, IL, Austin, TX, Denver, CO, Boston, MA, Washington D.C., Philadelphia, PA, Portland, OR, Seattle, WA, Miami, FL, and all other cities in CA. * Tier 3: All other locations not in Tier 1 or Tier 2 If you are an individual with a disability and would like to request a reasonable accommodation as part of the application or recruiting process, please let your Recruiter know when first connecting with them. Calendly is registered as an employer in many, but not all, states. If you are located in Alaska, Delaware, Hawaii, Idaho, Iowa, Montana, Nebraska, North Dakota, Rhode Island, South Dakota, and West Virginia, you will not be eligible for employment. Note that all individual roles will specify location eligibility. All candidates can find our Candidate Privacy Statement here Candidates residing in California may visit our Notice at Collection for California Candidates here: Notice at Collection This role may require occasional travel for company events, team collaboration, or offsites.

Calendly

WHAT’S IN IT FOR YOU?  Ready to make a serious impact? Millions of people already rely on Calendly, and we’re still in the midst of exciting product growth — it’s a fantastic time to join us. Everything you’ll work on here will accelerate your career to the next level. If you want to learn, grow, and do the best work of your life alongside the best people you’ve ever worked with, then we hope you’ll consider allowing Calendly to be a part of your professional journey. ABOUT THE TEAM & OPPORTUNITY  What’s so great about working on Calendly’s Engineering team?  We make things possible for our customers through innovation. Why do we need you? Well, we are looking for a Senior Full Stack Engineer who will bring technical know-how and enthusiasm to our team. You will report to one of our Engineering Managers and will be responsible for supporting features and architecture designed to maintain our users’ confidence in Calendly.  A DAY IN THE LIFE OF A SENIOR FULL STACK ENGINEER AT CALENDLY The Calendly platform is a monolith that is being decomposed into various services in order for us to scale our platform and team. We need ambitious, experienced engineers who can help us drive this stage of growth. As an engineer at Calendly, you will both build new features and work to scale our platform and architecture. You will build tooling and automation to fine tune our delivery process as you grow into a service oriented specialist. You will also learn to work with multiple technologies such as Google Cloud Platform, Go, Typescript, NodeJS, React, PostgreSQL, Redis, Kubernetes, Rails, to name a few. When you join Calendly, you get the opportunity to deliver on a product used by millions and known for its best-in-class quality. Help us continue to deliver critical features to our users with excellence. On a typical day, you will be working on:  * Collaborating within your team to build new features that are targeted at our highest impact enterprise customers * Contributing to platform scaling initiatives * Meeting regularly with Product and Design to fine tune requirements * Attending agile ceremonies to help your team plan out their work and get it done * Working across squads to improve Engineering practices at Calendly * Reviewing implementation plans and pull requests from your peers * Mentoring and coaching other team members What do we need from you? * 7-10 years of professional software development experience in a SaaS or technology-driven environment. * Strong, hands-on full-stack engineering skills, with the ability to independently design, build, and ship production changes across frontend and backend systems * Experience building and maintaining Node.js services that interface with distributed APIs, LLMs, or similar mixed-stack environments. * Hands-on experience with Service-Oriented Architectures (SOA), microservices, and involvement in monolith-to-services modernization or large-scale refactoring initiatives. * Proven ability to own features end-to-end, including technical discovery, design, implementation, testing, release, and ongoing maintenance. * Strong analytical and problem-solving skills, with the ability to dissect complex systems, identify root causes of issues, and deliver scalable, maintainable solutions. * A commitment to writing clean, reliable, and maintainable code, with an emphasis on readability, simplicity, and performance. * Adaptability to new technologies, evolving architectural patterns, and changing organizational priorities. * Experience using AI coding assistants (Copilot, Cursor, etc.) as productivity tools, with a clear understanding of generated code and the ability to defend implementation choices. * Availability for participation in an on-call rotation, ensuring timely and effective responses to critical production issues outside of regular working hours. * Authorized to work lawfully in the United States, as Calendly does not offer immigration sponsorship at this time. Tier 1 Salary Hiring Range $224,400—$271,920 USD Tier 2 Salary Hiring Range $205,700—$249,260 USD Tier 3 Salary Hiring Range $187,000—$226,600 USD The ranges listed above are the expected annual base salary for this role, subject to change. Calendly takes a number of factors into consideration when determining an employee’s starting salary, including relevant experience, relevant skills sets, interview performance, location/metropolitan area, and internal pay equity. Base salary is just one component of Calendly’s total rewards package. All full-time (30 hours/week) employees are also eligible for our Top Performer Bonus program (or Sales incentive), equity awards, and competitive benefits. Calendly uses the zip code of an employee’s remote work location, or the onsite building location if hybrid, to determine which metropolitan pay range we use. Current geographic zones are as follows: * Tier 1: San Francisco, CA, San Jose, CA, New York City, NY * Tier 2: Chicago, IL, Austin, TX, Denver, CO, Boston, MA, Washington D.C., Philadelphia, PA, Portland, OR, Seattle, WA, Miami, FL, and all other cities in CA. * Tier 3: All other locations not in Tier 1 or Tier 2 If you are an individual with a disability and would like to request a reasonable accommodation as part of the application or recruiting process, please let your Recruiter know when first connecting with them. Calendly is registered as an employer in many, but not all, states. If you are located in Alaska, Delaware, Hawaii, Idaho, Iowa, Montana, Nebraska, North Dakota, Rhode Island, South Dakota, and West Virginia, you will not be eligible for employment. Note that all individual roles will specify location eligibility. All candidates can find our Candidate Privacy Statement here Candidates residing in California may visit our Notice at Collection for California Candidates here: Notice at Collection This role may require occasional travel for company events, team collaboration, or offsites.