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Sr. Full Stack Engineer

MLW LogoMost Loved Workplace® Certified Job
92% of candidates apply because they are a Most Loved Workplace®
HQ - Sunnyvale (Office)
Engineering
FullTime

About the Role

At Illumio, a Most Loved Workplace® certified employer in the Technology space, The world leader in breach containment. Built on AI. Made for Zero Trust..

Onwards Together! Illumio is the leader in ransomware and breach containment, redefining how organizations contain cyberattacks and enable operational resilience. Powered by the Illumio AI Security Graph, our breach containment platform identifies and contains threats across hybrid multi-cloud environments – stopping the spread of attacks before they become disasters. Recognized as a Leader in the Forrester Wave™ for Microsegmentation, Illumio enables Zero Trust, strengthening cyber resilience for the infrastructure, systems, and organizations that keep the world running. Job Title: Full-Stack Engineer Location: Onsite, Sunnyvale, California (5 days a week in the office) Onwards Together! Illumio, the pioneer and market leader of Zero Trust segmentation, prevents breaches from becoming cyber disasters. Illumio protects critical applications and valuable digital assets with proven segmentation technology purpose-built for the Zero Trust security model. Illumio ransomware mitigation and segmentation solutions see risk, isolate attacks, and secure data across cloud-native apps, hybrid and multi-clouds, data centers, and endpoints, enabling the world’s leading organizations to strengthen their cyber resiliency and reduce risk. Illuminate the future with Illumio and join a team that’s passionate about developing cutting-edge security solutions that protect the world's most critical assets. Our Team's Vision Our Engineering team has established a culture based on thought leadership, independence, and responsibility. This powerful dynamic drives us forward as we work to make the digital world a safer place. We are seeking an early career Full-Stack Engineer to join our dynamic team. The ideal candidate will have a strong foundation in both front-end and back-end development, with a focus on UI using React, TypeScript, and other modern JavaScript frameworks. Experience with APIs for distributed systems is highly valued. This role involves developing scalable and responsive web applications that meet the needs of our users. Your Impact: Innovate and Disrupt: Develop products that revolutionize network segmentation, enhancing the protection of data centers and cloud stacks against attacks. Full-Stack Development: Design, develop, and test comprehensive full-stack applications using the latest native browser APIs, web servers, and frontend frameworks. Architectural Contribution: Enhance the full-stack architecture of web applications, including deployment, configuration, build systems, component libraries, style guides, and responsiveness. Evaluate and adopt open-source solutions. User Interaction Optimization: Identify and optimize user interaction workflows across UI applications, ensuring quality and consistency. User Experience and Design: Collaborate with UI experts to make decisions around user experience and visual design. Cross-Team Collaboration: Work with other development teams to improve the usability of cross-services APIs. Code Quality Ownership: Implement industry best practices for linting, static typing, unit testing, and functional/integration testing to build robust and resilient products. Product Partnership: Partner with Product Management to review, refine, and set product goals that exceed customer expectations. Customer Understanding: Develop a deep understanding of the fundamental problems our customers need to solve through interaction with stakeholders and peers. Your Toolkit: Experience: 5+ years of experience in full-stack/UI development. Front-end Skills: Proficient understanding of web markup, including HTML5 and CSS3. Strong experience with JavaScript, TypeScript, React.js, and other JavaScript frameworks. Back-end Skills: Experience with modern backend technologies and RESTful API design. (Nice to have) Experience developing microservices or working with service-oriented architectures. Version Control: Experience with version control tools, particularly Git. Bonus Points: Masters in Computer Science or equivalent degree Experience with Modern Front-end Build Pipelines: Familiarity with modern front-end build tools and pipelines. Cloud Platforms: Experience with cloud platforms (AWS, Azure, or Google Cloud). Containerization: Basic knowledge of containerization and orchestration tools (Docker, Kubernetes). #LI-TD1 #LI-ONSITE Our Commitment Illumio believes that an environment of unique backgrounds, experiences, viewpoints, and individual contributions creates a culture of belonging, drives our future, and makes us stronger together in support of our customers and their success. All official job offers from Illumio are extended directly by our recruitment team and will be sent through an official E-Signature document for your review and signature. Please be aware that we do not ask for any personal information in the process of extending offers of employment, such as financial details or social security numbers. Upon acceptance of any offer, we will request such information as part of the onboarding process prior to or on your first day of employment, and only after completing a background check through an authorized third-party vendor. If you receive any communication asking for personal details outside of these processes, please contact us immediately to verify the authenticity of the request. Your security is important to us, and we are committed to a safe and transparent hiring experience. For roles in San Francisco and Los Angeles: Pursuant to the San Francisco Fair Chance Ordinance and the Los Angeles Fair Chance Initiative for Hiring, Illumio will consider for employment qualified applicants with arrest and conviction records.

Want to learn more about what it's like to work at Illumio? View our full profile.

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Why This Is a Most Loved Workplace® Certified Job

What It's Like to Work Here

Lightbulb Continuous Innovation and Creative Problem-Solving
Users Collaborative Cross-Functional Teamwork
Heart Genuine Care and Support for One Another
Shield Ownership and Accountability
Zap Excellence in Execution with Speed
Globe Global Impact and Purpose-Driven Work
Certified for: Most Loved Workplace Most Loved Workplaces® 2026, Most Loved Workplace Most Loved Workplaces® 2025

Frequently Asked Questions About Working at Illumio

Common questions candidates ask about this role and Illumio's workplace

Illumio is a Most Loved Workplace®. Most Loved Workplaces® place love at center of business. Illumio is a Large employer in the Not Declared sector. Explore Illumio careers, culture, employee experience, and open roles.

Please review the specific job listing or contact Illumio's recruiting team for details on remote or hybrid work options for this role.

Salary information may vary by role and location. Please check the specific job listing or discuss compensation during the interview process.

Illumio is an established organization in its industry. The company is a certified Most Loved Workplace®, highlighting a strong, positive culture and committed workforce.

Key benefit categories include: Health and Wellness, Work-Life Balance, Professional Development, Financial and Retirement, Team and Community. You can view more details on their CertCheck profile.

The day-to-day environment is guided by core values such as Continuous Innovation and Creative Problem-Solving and Collaborative Cross-Functional Teamwork and Genuine Care and Support for One Another.

The company has committed to inclusive practices including: Empower Growth and Development and Foster Genuine Trust and Psychological Safety.

They have earned Most Loved Workplace® certifications including: Most Loved Workplace Most Loved Workplaces® 2026 and Most Loved Workplace Most Loved Workplaces® 2025.

Illumio currently has 68 open positions. They are hiring across departments like Engineering, Security, Sales. You can view all current openings at certcheck.mostlovedworkplace.com/companies/illumio/jobs.

The interview process typically involves an initial recruiter screen followed by team interviews. Please contact Illumio's recruiting team for specific details on this role's process.

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