Senior Full Stack Engineer

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 This role focuses on building and running high-impact experiments that improve how users discover, adopt, and pay for Calendly within our Growth organization. You’ll work across the stack, partner closely with product and analysts, and ship changes that are measured in real business outcomes. This is not a traditional feature team role. The work is fast-moving, iterative, and data-driven. You’ll regularly balance speed, quality, and long-term maintainability while operating in an environment with incomplete information. WHAT WE VALUE ON GROWTH * Ownership and follow-through; You care about results and learning, not just delivery * Sound judgment paired with a bias toward action * Technical leadership that raises the bar for the team * Curiosity, humility, and openness to diverse perspectives A DAY IN THE LIFE OF A SENIOR FULL STACK ENGINEER AT CALENDLY * Design, build, and ship full-stack growth experiments end-to-end * Improve key metrics across acquisition, activation, engagement, and monetization * Collaborate daily with product managers, designers, and analysts * Analyze experiment results and iterate quickly based on data * Contribute to our experimentation platform and growth infrastructure * Make thoughtful engineering tradeoffs in pursuit of impact On a typical week, you might: * Build and ship an experiment that impacts a core funnel step * Partner with product, design, and analysts to refine a hypothesis or flow * Review experiment results and decide what to iterate, keep, or remove * Improve or extend internal tooling that supports experimentation * Review code, mentor teammates, and participate in team ceremonies WHAT DO WE NEED FROM YOU? * 5+ years of professional software experience, with much of that working on user growth (acquisition, activation, retention) or monetization * Strong, hands-on full-stack engineering skills, with the ability to independently design, build, and ship production changes across frontend and backend systems * Demonstrated experience running product experiments end-to-end * A data-driven approach to problem solving * The judgment to balance speed and quality in a growth environment * Comfort operating in ambiguous problem spaces where the path forward is not fully defined and success is measured by outcomes, not effort * A collaborative working style and the ability to partner deeply with product, design, and analytics to drive results * A collaborative mindset and a willingness to give and receive feedback * Authorized to work lawfully in the United States of America as Calendly does not engage in immigration sponsorship at this time. STRONG CANDIDATES MIGHT: * Arrive with clear points of view on what experiments to run, why they matter, and how to evaluate their impact * Be able to quickly dive into data to uncover growth or monetization opportunities * Demonstrate ownership beyond implementation, from hypothesis formulation through post-launch analysis and follow-ups * Have experience scaling growth systems or experimentation platforms in a production environment OUR STACK You don’t need experience with everything below, but you should be excited to work across it: * Backend: Ruby on Rails, Grape, PostgreSQL, Redis * Frontend: React, TypeScript * Infrastructure: Google Cloud Platform, Kubernetes, Argo Workflows 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.

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.

Airbnb

Airbnb was born in 2007 when two hosts welcomed three guests to their San Francisco home, and has since grown to over 5 million hosts who have welcomed over 2 billion guest arrivals in almost every country across the globe. Every day, hosts offer unique stays and experiences that make it possible for guests to connect with communities in a more authentic way. The Community You Will Join: Everyone at Airbnb thinks about trust, but our team obsesses over it daily. At the core of trust is safety, and thus we spend a significant amount of our time and energy keeping the community safe. The Trust team is responsible for developing the technology that helps protect our community and platform from fraud while also ensuring our hosts, guests, homes, and experiences meet our high standards. We constantly work to fight against online fraud (such as monetary loss, compromised accounts, spam and scam in messages, fake inventory, etc.) as well as offline fraud (theft, property damage, personal safety, etc.). We also work on onboarding and screening of users, and think about complex topics like identity and reputation to ensure that every interaction with Airbnb helps build trust in us and our community. Trust Engineering is responsible for the technology vision and development of a complex stack that runs on every key interaction on the platform. The Difference You Will Make: As a senior technical individual contributor, you will partner closely with our leaders across the broader technical organization helping design, execute and deliver in a complex and collaborative roadmap of Trust engineering efforts that will require collaboration across many parts of the organization and many parts of Airbnb. Although you will be at one of our highest levels of seniority, all individual contributors at Airbnb are Software Engineers which means we expect you to be hands on and contribute code. A Typical day: * Define and execute the long-term vision and strategy for the Trust Platform, driving the architectural direction for foundational systems that enable scalable, high-quality fraud, safety, and trust decisioning across Airbnb, and are broadly leveraged across tech organizations * Dive deep into Trust Platform components, build system and performance tooling, and identify cross-cutting opportunities to elevate technical quality, operational excellence, and developer delight. * Champion an AI-first engineering approach, using LLM-powered agents to generate and iterate on code while you focus on problem-solving, system design, and quality oversight. * Partner with technical leaders, product managers, operations, data scientists, and Trust defense & ML teams to define and drive platform capabilities, tackle evolving fraud threats, and deliver measurable business impact * Lead and mentor engineers across teams, raising the technical bar and developing the next generation of technical leaders within the trust engineering ecosystem.  Your Expertise: * 12+ years of backend & platform engineering designing, building, and operating mission-critical distributed systems at scale. * BS, MS or Ph.D. in computer science or related field, or equivalent work experience * Proven experience guiding multi-year technical roadmaps: aligning long-term platform vision with day-to-day execution across multiple sub-teams, prototyping to iterate on ideas, and influencing without relying on formal authority. * Exceptional communication skills, equally effective white-boarding with senior ICs, partnering with cross-functional leads (Product, Design, Data Science), and presenting strategy to executives and the broader engineering community. * Obsessed with reliability: deep experience building and improving observability, SLOs, incident response, and resilience patterns (circuit breakers, graceful degradation, chaos testing) to keep mission-critical systems running at the highest bar. * Hands-on with modern languages (e.g., Kotlin/Java/Scala) and comfortable evaluating and introducing new technologies including AI-assisted development workflows (LLMs, code generation). * Experience building developer experience & tooling is a plus, with a mindset of treating internal developers as customers and championing self-service, documentation, and delightful DX. * Experience in the Trust and Risk domain is a plus. Your Location: This position is US - Remote Eligible. The role may include occasional work at an Airbnb office or attendance at offsites, as agreed to with your manager. While the position is Remote Eligible, you must live in a state where Airbnb, Inc. has a registered entity. Click here for the up-to-date list of excluded states. This list is continuously evolving, so please check back with us if the state you live in is on the exclusion list . If your position is employed by another Airbnb entity, your recruiter will inform you what states you are eligible to work from. Our Commitment To Inclusion & Belonging: Airbnb is committed to working with the broadest talent pool possible. We believe diverse ideas foster innovation and engagement, and allow us to attract creatively-led people, and to develop the best products, services and solutions. All qualified individuals are encouraged to apply. We strive to also provide a disability inclusive application and interview process. If you are a candidate with a disability and require reasonable accommodation in order to submit an application, please contact us at: reasonableaccommodations@airbnb.com. Please include your full name, the role you’re applying for and the accommodation necessary to assist you with the recruiting process.  We ask that you only reach out to us if you are a candidate whose disability prevents you from being able to complete our online application. How We'll Take Care of You: Our job titles may span more than one career level. The actual base pay is dependent upon many factors, such as: training, transferable skills, work experience, business needs and market demands. The base pay range is subject to change and may be modified in the future. This role may also be eligible for bonus, equity, benefits, and Employee Travel Credits.   Pay Range $248,000—$310,000 USD