Software Engineer

Jack; San Francisco (CA); On-site; USD 160,000 - 210,000; Full time

Benefits offered by this job

Competitive salary

Equity opportunity

Relocation support

Autonomy and ownership

Job summary

Jack in San Francisco is hiring a full-stack engineer to own the core platform, build customer-facing features, knowledge graphs, and AI agent workflows. You will develop across frontend and backend primarily in TypeScript, translate customer needs into production-ready features, and support rapid iteration with the founding team.

Qualifications include 3-5 years of experience, strong engineering fundamentals, and U.S. citizenship for security clearance eligibility.

Qualifications

• 3-5 years of professional full-stack software engineering experience.
• Experience shipping production software end-to-end in a fast-paced startup.
• Seed/Series A startup experience preferred.
• Strong frontend/backend, databases, and infrastructure fundamentals.
• U.S. citizenship required due to security clearance eligibility.

Responsibilities

• Own end-to-end full-stack development of the core platform.
• Build customer-facing features, knowledge graphs, AI agent workflows.
• Develop frontend and backend using TypeScript, Python, and cloud tech.
• Translate customer needs into production-ready features.
• Support launches and iterate based on feedback.
• Collaborate with founders on architecture and prioritization.

Skills

TypeScript

Python

Next.js

Express

PostgreSQL

AWS

AI/LLMs

Cloud infrastructure

Strong product mindset

Customer collaboration

Education

Bachelor's or higher in Computer Science/Engineering or related field

Tools

AWS

SQL/Databases

Job description

This fast-growing stealth defense technology startup is building an AI-native platform designed to automate complex operational and administrative workflows for mission-critical military organizations. By combining organizational data, knowledge graphs, LLM-powered agents, and workflow automation, the company is helping users replace highly manual processes with intelligent, scalable systems.

Backed by $2.5M+ in pre-seed funding from leading enterprise software and defense-tech investors, the company is already deployed with multiple Department of Defense customers and has approximately $270K in ARR, with significant growth expected as additional contracts launch. The team was also recently selected for a 7-figure Air Force R&D contract. This is an opportunity to join a small founding team at a key inflection point, take meaningful ownership of the product, and help shape both the technology and engineering culture as the company scales.

Responsibilities

• Own end-to-end full-stack development of the core platform
• Build customer-facing features, knowledge graphs, AI agent workflows, and internal platform capabilities
• Develop across the frontend and backend, primarily using TypeScript
• Translate customer and operational needs directly into production-ready features
• Support customer launches and rapidly iterate based on real-world feedback
• Build tools that allow customers to configure and manage their own AI agents and workflows
• Integrate LLMs and AI orchestration systems into production applications
• Develop and maintain scalable APIs, databases, and cloud infrastructure
• Collaborate directly with founders and engineers on product direction, technical architecture, and feature prioritization
• Participate in occasional customer visits to military installations to better understand users and operational workflows

Qualifications

• 3-5 years of professional full-stack software engineering experience
• Experience shipping production software end-to-end in a fast-paced startup or similarly high-ownership environment
• Early-stage startup experience, ideally Seed or Series A
• Strong full-stack engineering foundation across frontend, backend, databases, and infrastructure
• Experience with TypeScript, Python, Next.js, Express, PostgreSQL, or similar technologies
• Experience deploying and operating applications on AWS or another major cloud provider
• Experience integrating LLMs, AI agents, or AI-powered workflows into production applications is a plus
• Technical degree in Computer Science, Mathematics, Physics, Engineering, or a related field preferred
• Strong product mindset with the ability to translate customer problems into scalable technical solutions
• Comfortable working directly with customers and incorporating feedback into product development
• Collaborative, low-ego approach with strong communication and problem-solving skills
• Comfortable working in a fast-moving, ambiguous startup environment with significant ownership
• U.S. citizenship required due to security clearance eligibility requirements
• Able to work in person 5 days per week in downtown San Francisco
• Open to occasional travel, approximately once per month
• Military or defense-tech experience is a plus

Benefits

• Competitive salary of $160K-$210K
• 0.5%-1.5% equity
• Equity currently priced at pre-seed levels ahead of an anticipated Seed round
• Backed by $2.5M+ in pre-seed funding
• Opportunity to join a small founding team with significant ownership and autonomy
• Work directly with founders and early engineering team members
• Shape the technical architecture, product direction, and engineering culture
• Build technology used in real-world, mission-critical environments
• Direct exposure to customers and the problems you're solving
• Opportunity for meaningful career growth as the company scales
• Relocation support may be available for candidates moving to San Francisco