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Software Engineer : Core Application Security

Engineering | Palo Alto, CA | Full Time

Job Description

At Instart, we are building a world where digital experiences continuously adapt to become increasingly engaging with every interaction.

Instart is a Palo Alto based late stage startup backed by the who’s who of the VC world – Andreessen Horowitz, Kleiner Perkins, Greylock and Sutter Hill to name a few.

Today, we are the trusted digital experience management partner for Fortune 100 companies, who are leaders in their respective industries. Our team is made up of motivated individuals that help each other do remarkable things every single day. We have built an amazing platform that large enterprises around the world are using to drive the performance, consumer experience and security of their cloud, web and mobile applications.

Of course, because we are building groundbreaking applications and architecture that is transforming and disrupting application delivery at the enterprise level scale, we are facing new challenges in every facet of our business. So, we are looking for disruptive, transformative individuals ready to embrace these challenges with the same passion, vision, and dedication that we do.

Instart’s digital experience management platform combines artificial intelligence, application and device awareness, and open APIs with a broad suite of integrated and automated capabilities spanning Cloud, Web and Mobile Application Performance Optimization, Image Optimization, Digital Advertising and Marketing Analytics Recovery, Web Application Firewall, DDOS Protection, Bot Management and a Content Delivery Network.


We are looking for a passionate engineer to help design and build innovative features to help continue and expand on our leadership in Application Delivery. The responsibilities will include innovating the client platform (Nanovisor) and building mission critical security features and distributed/scalable services on top of this platform. If this excites you we want to talk to you.


  • Language Skills (Javascript, Java, Node.js, Typescript, HTML5, CSS etc)
  • Minimum 5+ years of hands-on high-performance development experience in Web technologies such as Web Apps, Browsers, JavaScript Engines, Web Servers, etc.
  • Excellent development and debugging skills using Java, JavaScript and/or C/C++
  • Expertise with browser security controls (CSP, XFO, HSTS etc),
  • Contributions to the security community such as research, public CVEs, bug-bounty recognitions, open-source projects, and blogs or publications.
  • Strong knowledge of the browser security model, crypto, and network security.
  • Attacker mindset: Passion for breaking all the things unbreakable.
  • Minimum Bachelors or Masters in Computer Science (or equivalent)
  • Strong experience with security tools such as static analysis, runtime analysis, black-box testing.
  • Experience in programming in a browser-based environment
  • Prior experience being part of a team that delivered early versions of a product in a successful startup
  • You must have a deep passion for coding, and also be versatile enough to explore and solve problems across various facets of computer science, including:
  • Browsers and Javascript Engines
  • Browser Side Security (XSS, CSRF, CSP)
  • Web Application Firewalls
  • Algorithms and design
  • Machine learning
  • Application Firewalls
  • Client Cloud Architectures
  • Virtualization, Containerization and Micro Services
  • Data Analytics
  • Distributed computing
  • Networking
  • Large-scale system design
  • Compiler Technologies
  • Computer Vision and Image Processing
  • Asynchronous Programming

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.