Jack & Jill

About the Company

Ok, I'll go first. I'm Jack, an AI that gets to know you deeply, what you're great at and what you want out of your career. I then work to make that a reality - finding the best fit public job listings as they come up, supporting with applications, interview prep, and moral support.

I also work together with my partner Jill to find off-market opportunities and introduce you directly to companies, just like a recruiter would.

And I'm Jill, an AI that spends time with hiring managers and talent teams to really understand their company, their open roles, and who will thrive there. I work with Jack to find great fit people, like a headhunter with 1000x the network.

Head to website and have a chat with us, we're always online.

Listed Jobs

Company Name

Jack & Jill

Job Title

Security Engineer

Job Description

**Job Title** Staff Security Engineer (Application Security) **Role Summary** Senior leader responsible for embedding security‑by‑design across a high‑trust healthcare platform. Sets organization‑wide AppSec strategy, drives architectural reviews and threat modeling, cultivates a security‑first culture, and delivers automation/AI guardrails to enable rapid, secure product development. **Expectations** - Proven senior‑level security experience with measurable, company‑wide impact. - Deep expertise in application security and modern threat landscapes. - Strong understanding of major cloud platforms and enterprise security frameworks. - Excellent communication, influencing, and mentorship abilities to drive cultural change. **Key Responsibilities** - Define and execute the application security roadmap aligned with product velocity. - Lead design reviews and threat‑modeling sessions for cloud and on‑premises environments. - Build and manage a security champions program to foster secure‑by‑default engineering. - Deploy automation and AI‑driven tooling for self‑service security and rapid remediation. **Required Skills** - Application security architecture & secure coding practices. - Threat modeling (e.g., STRIDE, PASTA) and security design reviews. - Cloud security expertise (AWS, Azure, GCP) and enterprise security concepts. - Automation/AI tooling for security (CI/CD integration, static/dynamic analysis, remediation bots). - Strong verbal and written communication; ability to influence cross‑functional teams. - Mentoring and leadership experience. **Required Education & Certifications** - Bachelor’s degree in Computer Science, Information Security, or related field (or equivalent experience). - Preferred certifications: CISSP, OSCP, CSSLP, CCSP, AWS/Azure/GCP Security Specialty, or comparable industry certifications.

London, United kingdom

On site

23-09-2025

Company Name

Jack & Jill

Job Title

Frontend Developer

Job Description

**Job Title:** Front End Engineer **Role Summary:** Front‑end engineer responsible for owning and advancing a customer‑facing web application and its component library for an AI‑driven simulation startup. Focus on building real‑time, data‑heavy UI experiences, ensuring high performance, polish, and intuitive interaction in a fast‑paced, autonomous environment. **Expectations:** - 3–6+ years of professional experience in modern front‑end development. - Deep expertise with React and sophisticated client‑side state management. - Strong TypeScript proficiency and ability to deliver real‑time, data‑intensive interfaces. - Ability to translate design concepts into production‑ready code with excellent product sense. - High ownership, self‑direction, and collaboration across design and backend teams. **Key Responsibilities:** - Lead development of the customer‑facing web app and reusable component library. - Build and ship interactive dashboards and data visualizations that clarify complex experiments. - Manage complex client‑side state and synchronize data across scenarios and user cohorts. - Collaborate with UI/UX designers and backend engineers to deliver fast, polished, and intuitive user experiences. - Maintain code quality, performance, and accessibility standards. **Required Skills:** - Advanced React (hooks, context, concurrent features) and modern JavaScript/TypeScript. - Expertise in state‑management solutions (e.g., Redux, Zustand, Recoil, MobX). - Experience with real‑time data handling, websockets, or streaming APIs. - Proficiency in building responsive, data‑heavy interfaces and visualizations (e.g., D3.js, Chart.js). - Strong understanding of front‑end build tools (Webpack, Vite, Babel) and CI/CD pipelines. - Good design‑to‑implementation instincts and product intuition. - Familiarity with agent‑based systems or experimentation platforms is a plus. **Required Education & Certifications:** - Bachelor’s degree in Computer Science, Engineering, or a related technical field (or equivalent professional experience). - Relevant certifications (e.g., React, TypeScript) are optional but beneficial.

San francisco bay, United states

On site

23-09-2025

Company Name

Jack & Jill

Job Title

Full Stack Engineer

Job Description

Job title: Senior Full‑Stack Engineer Role Summary: Own end‑to‑end feature development across backend services and modern web UIs for an AI‑driven product company. Lead rapid iteration, build data‑rich visualizations, integrate machine‑learning outputs, and maintain internal tooling and developer workflows. Expectations: • 5+ years full‑stack experience, preferably in fast‑moving startup environments. • Product‑oriented mindset with strong UX sensibility. • Comfortable with state management, API design, data‑heavy interfaces, and experimentation. Key Responsibilities: • Design, develop, and ship features across the entire stack. • Create intuitive visualizations that simplify complex behaviors. • Collaborate with ML and infra teams to surface AI‑powered insights into the product. • Own internal tooling and CI/CD pipelines to enable weekly releases. Required Skills: • Proven backend development (Node.js, Python, or similar). • Front‑end expertise (React, Vue, or equivalent) with modern state‑management patterns. • API design and consumption. • Experience building data‑rich dashboards and interactive visualizations. • Ability to translate messy data signals into clean, user‑friendly UI/UX. Required Education & Certifications: • Bachelor’s degree in Computer Science, Software Engineering or related field. • Optional certifications in Full‑Stack Development, API Design, or Data Visualization.

San francisco bay, United states

On site

23-09-2025