Temporary Full Stack React Developer Jobs in Colorado

As the leading provider of Cybersecurity-as-a-Service (CSaaS), RADICL is revolutionizing advanced cyberthreat protection for small and medium-sized businesses (SMBs) in the U.S. Defense Industrial Base (DIB) and other regulated industries. No longer should SMBs be satisfied with lack luster solutions delivering lack luster protection. RADICL is ushering in a new era of turn-key and affordable cyberthreat protection via its AI-powered virtual SOC platform that allows human and digital agents to quickly and seamlessly become SMBs’ day-to-day compliance and security operations team.

RADICL’s turn-key CSaaS offering uniquely combines compliance management with AI and expert-driven 24/7 security operations. We guide customers to regulatory and best practice adherence with standards like CMMC and NIST CSF while also delivering 24/7 threat monitoring, deep-spectrum™ threat hunting, incident response, vulnerability management, and security awareness training.

With RADICL, customers can stay mission focused, confident their front, rear, and flank are protected, affordably and without compromise.

If you’re excited about working with industry experts to help SMBs focus on growing their businesses without the constant worry of security and compliance risks, we invite you to join us in our mission to protect American businesses and drive innovation in cybersecurity.

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.

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.

• 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

• 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

At RADICL, we prioritize our culture and believe the strongest teams are built through daily, side‑by‑side collaboration and experiential sharing. We also value individual freedom and flexibility. For this reason, we have a hybrid work model. As a team, we are in office M/W/Th with work‑from‑home on Tuesdays and Fridays. For remote positions, periodic travel to Boulder will be expected to participate in company events and meaningful side‑by‑side collaboration opportunities.

RADICL offices are in downtown Boulder, Colorado with easy‑to‑access employee parking provided by the company. We offer comprehensive, competitive benefits including health, dental, and vision as well as 401K and a responsible PTO plan.