--- title: 'Sr. Full Stack Engineer at Illumio' canonical: 'https://feeny.ai/job/sr-full-stack-engineer-illumio-hq-sunnyvale-ca-4781ttxh2kyn' type: 'job' last_seen: '2026-09-08' --- # Sr. Full Stack Engineer at Illumio - **Company:** [Illumio](https://feeny.ai/companies/illumio) - **Location:** HQ / Sunnyvale, CA - **Employment:** full-time - **Work type:** onsite - **Posted:** 2026-08-03 - **Last confirmed live:** 2026-09-08 - **Apply:** https://jobs.ashbyhq.com/illumio/8cf0360e-c52d-458b-9735-6acd10be1ac7 ## Job description 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 our company 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. ## About Illumio ## Company Overview - **One-liner**: Illumio provides a breach containment platform that prevents lateral movement and strengthens cyber resilience across hybrid and multi-cloud environments using AI-powered microsegmentation. - **Entity Type**: Private (over $557.5M in total funding, 5 rounds, late-stage) - **Headquarters**: Sunnyvale, California, USA - **Founded**: 2013 - **Founders**: Not publicly available (co-founders typically listed as Andrew Rubin and PJ Kirner, but not confirmed in provided sources) ## Core Business - **Primary industry/industries**: Cybersecurity (Computer and Network Security) - **Target customers**: B2B – enterprise and midsize businesses across banking & financial services, energy & utilities, government, healthcare, and manufacturing - **Mission or purpose statement**: “Breaches are Inevitable. Disasters are Optional.” – focuses on shifting from prevention to cyber resilience and breach containment. ## Products & Services - **Illumio Segmentation**: Microsegmentation platform that secures critical assets, workloads, and devices across hybrid and multi-cloud environments. Prevents lateral movement and enforces Zero Trust. - **Illumio Insights**: AI-powered observability, detection, and containment platform. Identifies lateral movement, detects attacks, and enables one-click containment using the Insights Agent (AI teammate). - **Illumio CloudSecure**: A newer product focused on cloud security, integrating with Azure Firewall Management and other cloud environments. ## Market Standing - **Valuation/Market Cap**: Not disclosed. - **Key Metrics**: Annual revenue of $100M (LinkedIn estimate); total funding of $557.5M (LinkedIn). - **Notable Investors/Partners**: Not specified in provided sources. Key partnership: collaboration with Microsoft to strengthen cyber resilience and prevent breaches at scale. - **Growth Signals**: 640 employees (+12.0% YoY, +96 people); named a 2024 Forrester Wave Leader in Microsegmentation; named a Customers’ Choice in the 2026 Gartner Peer Insights Voice of the Customer for Network Security Microsegmentation; targeting new AI-driven market with Insights Agent. ## Competitive Advantages - Proven leader in microsegmentation (Forrester Wave Leader, Gartner Customers’ Choice). - First-to-market breach containment platform – not just detection but automated containment. - Strong cross-platform support (hybrid, multi-cloud, on-premises). - High customer satisfaction (4.8/5 star rating based on reviews). - Deep integrations with major cloud providers (Microsoft Azure, AWS). ## Strategic Focus - Expanding AI capabilities with the Insights Agent for faster threat detection and automated remediation. - Deepening cloud-native integrations, especially with Azure Firewall Management. - Scaling from mid-market to large enterprise and government sectors. - Building a new global headquarters (Sunnyvale) and expanding regional offices (London, Paris, Tokyo, Singapore, Australia, etc.). ## Why Work Here - **Culture**: “Illumineer” culture built on innovation, cross-functional collaboration, and inclusion. Core values: Customer First Always, Relentless Execution, Onwards Together. - **Work model**: Hybrid – 2 days per week in office (Sunnyvale); every Friday is a remote work day. - **Benefits**: Comprehensive medical benefits, generous parental leave, fitness reimbursement, mentorship program, professional development resources, catered lunches, stocked kitchen, Illumineer Day (dedicated holiday). - **Employee Resource Groups**: The Neuroverse (neurodiversity), The Rainbow Room (LGBTQIA+), The Women (women’s leadership), The Village (caregivers). - **Growth**: Fast-growing company (12% headcount YoY) with a mission-critical cybersecurity product; interns work on real projects that impact the future of security. ## Sources 1. [Illumio Homepage](https://www.illumio.com/) 2. [Illumio Careers Page](https://www.illumio.com/company/careers) 3. [Illumio Corporate Overview](https://www.illumio.com/resource-center/corporate-overview) 4. [Illumio Job Listing (Senior Backend Engineer)](https://www.illumio.com/company/job-listing) 5. [Illumio LinkedIn Company Page](https://www.linkedin.com/company/illumio) ## Other roles at Illumio - [Enterprise Sales Executive](https://feeny.ai/job/enterprise-sales-executive-illumio-tokyo-zvr9x3b4fvv8) — Tokyo, Japan - [Digital Marketing Manager - EMEA & APAC](https://feeny.ai/job/digital-marketing-manager-emea-apac-illumio-united-kingdom-3mafa3tymacx) — United Kingdom - [Sr. Engineering Manager - Architecture](https://feeny.ai/job/sr-engineering-manager-architecture-illumio-hq-sunnyvale-ca-1mvjscekcvfy) — HQ / Sunnyvale, CA - [RVP, South](https://feeny.ai/job/rvp-south-illumio-georgia-s0zsh6qrxcvq) — Georgia - [Sr. Manager, Engineering - Cloud Security](https://feeny.ai/job/sr-manager-engineering-cloud-security-illumio-hq-sunnyvale-ca-4anywbf645nr) — HQ / Sunnyvale, CA - [Member of Technical Staff II- Cloud Security](https://feeny.ai/job/member-of-technical-staff-ii-cloud-security-illumio-sunnyvale-andbqx25d4fw) — Sunnyvale, CA / HQ - [Staff Engineer - Container Security](https://feeny.ai/job/staff-engineer-container-security-illumio-sunnyvale-ypkw5k03q106) — Sunnyvale, CA / HQ - [Staff Engineer - Cloud Security](https://feeny.ai/job/staff-engineer-cloud-security-illumio-sunnyvale-zb72ybtevhsz) — Sunnyvale, CA / HQ - [Director, Product Management](https://feeny.ai/job/director-product-management-illumio-sunnyvale-tsrtv28gahj9) — Sunnyvale, CA / HQ - [Sr. Engineering Manager - Full Stack](https://feeny.ai/job/sr-engineering-manager-full-stack-illumio-hq-sunnyvale-ca-tr0tava8r9jg) — HQ / Sunnyvale, CA