Fenrir Security Private Limited

Job Title: Founding Engineer / Senior Full Stack Developer (Electron + AI Platform)

Location: Mumbai

Type: Full-time

Compensation: ₹17–20 LPA + 0.4% Equity (ESOP Pool)

Role Overview

We’re hiring a Founding Engineer / Senior Full Stack Developer to help us build an advanced desktop application designed for secure, intelligent, and autonomous workflows. You’ll be one of the first engineering hires and play a critical role in owning the entire product engineering stack—from interface to system orchestration.

This is a high-ownership role for someone who thrives in early-stage environments, enjoys building performance-focused desktop systems, and wants to work at the cutting edge of AI-enabled automation.

What You’ll Work On

• Architect and build a high-performance Electron-based desktop application
• Develop intelligent frontend workflows using React 18, TailwindCSS, and TypeScript
• Build scalable backend services in Node.js 20 with support for secure tool orchestration
• Integrate with external systems like CLI tools, terminal processes, file systems, and MCP-like interfaces
• Build efficient local storage, memory, and prompt-pipeline management systems
• Work on token and session lifecycle, agent command execution, and sandboxed operations
• Ship cross-platform (Windows & macOS) builds using Electron and Vite pipelines

Tech Stack

You should already be comfortable with most of the following:

• Frontend: React 18, Tailwind CSS, TypeScript, Vite
• Backend: Node.js 20, Express.js, CLI process spawning, OS-level scripting
• Desktop: Electron 25, IPC communication, Electron Forge/Builder, native packaging
• AI/Agent Integration: REST APIs to LLMs (Claude, GPT, etc.), prompt engineering, token/tokenizer management
• System-Level: File system manipulation, workspace persistence, multi-threaded job handling
• Tool Control & Integration: Interfacing with command-line tools (MCP-like integrations), automated I/O
• Other: GitHub Actions, secure storage, error logging, telemetry pipelines

What We’re Looking For

• 4+ years of full stack development experience with real-world Electron app delivery
• Strong proficiency in JavaScript/TypeScript (ES6+), including bundling and module systems
• Production-level experience with React and managing state in large apps
• Deep understanding of backend architecture, async task management, and secure file handling
• Ability to work independently in a fast-paced early-stage environment
• Comfortable with cross-platform builds (Windows & macOS)
• Bonus: Experience with embedded AI assistants, autonomous agent frameworks, or toolchain orchestration

What We Offer

• Competitive salary: ₹17–20 LPA
• 0.4% equity via ESOP pool (with early joining incentives)
• High autonomy and strategic influence—work as a true co-creator
• Remote-friendly and async collaboration culture
• Opportunity to build a developer-first product from scratch with real AI depth

Project Overview

Be part of developing "Fenrir Security" - a groundbreaking autonomous security testing platform. We're creating an AI-powered security testing solution that integrates with an Electron desktop application. This contract role offers the opportunity to build cutting-edge autonomous agent technology for security testing applications.

Contract Details

• Duration: Initial 4-month contract with possibility of extension
• Work Arrangement: Remote with regular online collaboration
• Compensation: Competitive rates based on experience (₹1,00,000-₹1,80,000 monthly)
• Hours: Flexible, approximately 40 hours weekly

Role & Responsibilities

• Develop the core autonomous agent architecture for security testing
• Design and implement the agent's planning and execution capabilities
• Create natural language interfaces for security test configuration
• Build knowledge representation systems for security testing methodologies
• Implement security vulnerability detection and analysis components
• Integrate autonomous capabilities with the Electron application
• Create learning mechanisms to improve testing efficacy over time
• Collaborate with security expert to encode testing approaches
• Deliver functional autonomous testing components at regular milestones
• Participate in technical planning and architecture decisions

Skills & Experience

• 3+ years of AI/ML development experience
• Strong background in autonomous agent systems or similar AI architectures
• Experience with LLM integration and prompt engineering
• Proficiency in Python and relevant AI/ML frameworks
• Knowledge of natural language processing techniques
• Understanding of machine learning approaches for security applications (preferred)
• Ability to work independently with minimal supervision
• Strong problem-solving abilities and communication skills

Why Join Us

• Work at the cutting edge of AI and cybersecurity technology
• Flexible working arrangements and competitive compensation
• Opportunity to solve novel technical challenges
• Potential for equity or profit-sharing in future funding rounds
• Build portfolio-worthy work in an innovative field

Selection Process

1. Initial screening call
2. Technical assessment (paid task)
3. Final interview with founder
4. Contract discussion and onboarding

Project Overview

Join an exciting early-stage project developing "Fenrir Security" - an innovative autonomous security testing platform. We're building an Electron-based desktop application that leverages AI to automate security testing processes. This is a contract position with potential for long-term engagement as the product evolves.

Contract Details

• Duration: Initial 4-month contract with possibility of extension
• Work Arrangement: Remote with regular online collaboration
• Compensation: Competitive rates based on experience (₹80,000-₹1,50,000 monthly)
• Hours: Flexible, approximately 40 hours weekly

Role & Responsibilities

• Design and develop a cross-platform Electron application from scratch
• Implement both frontend UI components and backend functionality
• Create integration points for the autonomous testing engine
• Build secure communication protocols between application components
• Develop data visualization components for security testing results
• Implement application packaging and distribution mechanisms
• Work collaboratively with AI/ML specialist and security expert
• Deliver working application builds at regular milestones
• Participate in technical planning and architecture decisions

Skills & Experience

• 3+ years experience building production applications
• Strong proficiency with Electron framework development
• Expertise in JavaScript/TypeScript, HTML/CSS, and Node.js
• Experience with modern frontend frameworks (React preferred)
• Working knowledge of desktop application development challenges
• Familiarity with security tools and applications (preferred)
• Ability to work independently with minimal supervision
• Strong problem-solving abilities and communication skills

Why Join Us

• Work with cutting-edge technologies at the intersection of AI and cybersecurity
• Flexible working arrangements and competitive compensation
• Opportunity to shape a product from its foundation
• Potential for equity or profit-sharing in future funding rounds
• Build portfolio-worthy work in an innovative security product

Selection Process

1. Initial screening call
2. Technical assessment (paid task)
3. Final interview with founder