Senior Full Stack Engineer

RADICL•Boulder, CO, CO

7d•$140,000 - $185,000•Hybrid

About The Position

RADICL is seeking a Senior Full Stack Engineer to join our Apps team. You'll design and build the core product experiences that security operators use daily - from vulnerability management and compliance assessment workflows to security awareness training platforms and task management systems. You'll work across our entire technology stack, from React components and Express APIs to Go microservices and PostgreSQL databases, delivering end-user functionality that helps organizations manage risk, maintain compliance, and strengthen their security posture. Your work will directly impact how effectively our customers navigate complex security challenges through intuitive interfaces, robust backend systems, and seamless integrations. You'll be a key part of our ongoing evolution toward modern, scalable architecture while maintaining the reliability and security our customers depend on. If the above excites you, RADICL Defense is seeking high performing, motivated individuals to join our mission. As an early member, you will work closely alongside an experienced founding team and realize the life-changing experience of building a company. You will work with the latest technologies in software, cybersecurity, and cloud and will have a significant impact on the formation of our platform and offering. About You You enjoy fast-paced environments, bring a positive attitude, and excel at getting things done. You enjoy being part of a high performing team and are also able to self-direct and self-start. You consider yourself to be top tier talent and are eager to help others raise their game. You enjoy working with customers, are an excellent communicator, and able to engage and interact with people of various backgrounds and skill levels. You want your work to have meaning, to be important. You want to be part of creating something great.

Requirements

Full-stack proficiency: Strong JavaScript/TypeScript skills with React and Node.js; 5+ years of production experience
Go experience preferred: Opportunity to work with modern, performant microservices and contribute from day one
Database expertise: PostgreSQL proficiency including complex queries, schema design, migrations, and performance optimization
API design: Experience with RESTful services, async job processing, and event-driven architectures
Frontend modernization: Familiarity with React Hook Form, Zod validation, modern state management (TanStack Query, Zustand), and component libraries
Multi-tenant systems: Understanding of tenant isolation, RBAC patterns, and scalable architecture design
Testing practices: Experience with unit testing, integration testing, and end-to-end testing frameworks
Cloud infrastructure: AWS experience with ECS, RDS, Lambda, S3; Docker containerization and Infrastructure as Code
Security domain awareness: Interest in cybersecurity, understanding of vulnerability management, compliance frameworks, and security workflows
DevOps mindset: Experience with CI/CD, feature flags, monitoring, and production incident response
Education: Bachelor's degree in computer science, software engineering, or related field—or equivalent professional experience

Responsibilities

Full-stack ownership — build end-to-end features from React components through Express APIs to Go microservices and PostgreSQL databases
Security operator experiences — design and implement vulnerability remediation workflows, compliance assessment interfaces, security training dashboards, and task management systems
Modern web architecture — work with React 18, TypeScript, TanStack Query, Zustand, and our internal component library built on Radix and Tailwind
Scalable backend systems — develop Go microservices with Echo framework, implement async job processing, and build multi-tenant data architectures
Integration complexity — create resilient integrations with security tools, compliance platforms, and third-party APIs while handling vendor failures gracefully
Multi-tenant platform — build tenant-isolated systems with sophisticated RBAC, audit trails, and regulatory compliance requirements
Quality and reliability — write comprehensive test suites (Vitest, Playwright, Go tests), implement monitoring, and ensure production stability
Technical leadership — mentor team members, lead architectural decisions, and drive best practices across the stack