Senior Frontend Engineer

About Mars Security

Mars Security is an early-stage cybersecurity company building a new category of security technology, backed by deep hands-on experience from offensive security, threat intelligence, and security operations.

We're building a platform that lets security teams run continuous threat hunting and detection engineering across their existing stack. Most SOCs cannot tell you which active campaigns their environment would catch today. Mars closes that gap.

Founded by experienced operators, backed by world-class investors, and working with design partners across financial services, healthcare, pharma, and industrial security. We're building a team of people who thrive on ownership, ambiguity, and impact.

About The Role

Mars Security is looking for a Senior Frontend Engineer to join the product team at a stage where your decisions stick. The platform is complex: security teams work with high-density data, multi-step workflows, and operational contexts where clarity and speed are not optional. You'll own the frontend experience from architecture to pixel, working directly with founders, product, and backend engineers to build something practitioners actually want to use.

If you've spent time building SaaS platforms with serious UI complexity and you're done shipping interfaces that slow people down, this is your role.

What You'll Do

Architect and build core product features from scratch, with real ownership over frontend decisions

Design and implement interfaces for complex security workflows.

Collaborate directly with product and design to translate security workflows into usable, fast UI

Build reusable component libraries and set the bar for frontend quality across the team

Work closely with backend engineers on API design, performance, and integration

Ship fast, iterate on feedback, and maintain high standards without bureaucracy

What We're Looking For

5+ years of frontend engineering experience, with a meaningful portion on SaaS platforms with complex, data-intensive UI

Deep proficiency in React and TypeScript

Proven ability to build and scale component systems that handle real-world data complexity

Strong instincts around UX and performance - you've worked on products where both actually mattered

Experience with state management at scale, real-time data, and API-heavy frontends

Capable of operating independently, making architectural decisions without constant guidance

Startup experience is a strong advantage

Based in Tel Aviv, on-site

Why Mars Security

Ground-floor opportunity at a well-funded, fast-growing cybersecurity company

Direct access to founders and real influence on product direction

Deep exposure to a genuinely hard, unsolved problem in security

Work on a product that security practitioners will open every day

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