👨‍💻Subho Halder

Founder | AI x Security | Co-Founder, Appknox

San Francisco Bay Area

About

Leading Appknox as Co-founder, my expertise in mobile security has been pivotal in advancing the safety of banking and payment apps across Asia. My 10-plus years co-founding and steering Appknox have been dedicated to developing robust security frameworks and fostering a proactive culture of innovation. The team and I have achieved significant milestones in identifying and mitigating security vulnerabilities, thanks to our command of web applications and Android development. Embedding my deep-seated values of diligence and strategic foresight, we have successfully positioned Appknox as a trusted ally in the cybersecurity domain.

Experience

  • Founder at Stealth AI Startup
    Feb 2026 - Present · 6 mos

    Founder at a stealth AI startup focused on building practical, high-leverage AI systems for security and engineering teams. I am leading the company from first principles, including problem selection, product direction, early prototyping, and customer discovery. Currently validating use cases with design partners and building an execution-driven team to take the product from prototype to production.

  • Appknox (12 yrs 7 mos)
    • Co-Founder
      Feb 2026 - Present · 6 mos

      Co-Founder of Appknox. I have been the primary force behind what Appknox is and how it is perceived in the market, shaping its DNA across product philosophy, security research depth, and differentiation. I built the core narrative, helped define what we stand for, and drove the standards of execution that made Appknox trusted by enterprise customers. Previously served as CEO. I continue supporting Appknox as a founder, focused on strategy, key relationships, and long-term direction.

    • Cofounder & CEO
      Sep 2024 - Mar 2026 · 1 yr 7 mos

      As the CEO of Appknox, I lead the company’s vision, mission, and strategy to position it as a global leader in application security. My focus is on driving business growth by scaling revenue, enhancing customer retention, and expanding our footprint across SEA, GCC, US, and India. By fostering a customer-centric approach, I ensure our solutions align with evolving security needs while delivering measurable value to customers and stakeholders. I oversee the development of cutting-edge innovations, including scalable engineering architectures and AI-driven capabilities, to elevate our product offerings. I prioritize operational excellence while optimizing delivery pipelines and customer success processes. My leadership extends to building and empowering high-performing teams across product, engineering, marketing, and sales to achieve organizational goals. Beyond operational leadership, I represent Appknox at global forums like OWASP, ADA, IOXt to share insights and establish thought leadership in the application security domain. My commitment is to align our long-term vision with impactful strategies that drive growth, innovation, and industry recognition.

    • Cofounder and Chief Information Security Officer
      Sep 2019 - Mar 2026 · 6 yrs 7 mos

  • Assistant Software Engineer at Tata Consultancy Services
    Aug 2012 - Nov 2013 · 1 yr 4 mos

    I worked with the Digital Innovation Team, leading the Mobile Security Group inside TCS. I was responsible for building the Team and in-house Tools used for Mobile Security Assesment. I headed the Mobile Security project to build integration within TCS with our in-house tool to detect security issues and perform automated security analysis.