Software Engineer, Full Stack Developer

[solidcore] is seeking an experienced Software Engineer to help build and scale our digital fitness platform. The ideal candidate will collaborate closely with cross-functional teams to design, develop, and maintain the mobile and web applications that power the [solidcore] member experience. This role will play a key part in shaping scalable backend services, leveraging modern cloud infrastructure, and exploring how AI-driven tools and automation can enhance both internal operations and the end-user journey.

Located in vibrant Arlington, Virginia, and reporting to the Director of Engineering, this is an exciting opportunity to join a rapidly growing, investor-backed organization with a passion for innovation and a mission to be the leader in the studio fitness space.

• Build and maintain [solidcore]'s fitness platform using modern technologies including Node.js, React Native/Expo, Next.js, and AWS services
• Design and implement scalable backend services and APIs using AWS Lambda, Dynamo
  
  DB, and other cloud infrastructure
• Develop and enhance mobile and web applications that power the [solidcore] member experience
• Leverage AI-powered development tools like Cursor, Claude Code, and Git Hub Copilot to accelerate development and improve code quality
• Build and maintain AI agents and automation systems that enhance both internal operations and member experiences
• Collaborate with cross-functional teams to ship features that directly impact thousands of fitness enthusiasts daily
• Optimize application performance and resolve production issues, including monitoring with Sentry and responding to incidents
• Implement and maintain integrations with third-party platforms like Mind Body Online and Contentful CMS
• Participate in code reviews via Git Hub and contribute to maintaining high code quality standards
• Work with blue‑green deployment strategies and modern CI/CD practices to ensure reliable releases
• Stay current with emerging AI technologies and evaluate their potential application to our platform and workflows

• 3-5 years of professional software development experience
• Strong proficiency in JavaScript/Type Script and Node.js
• Experience with modern frontend frameworks (React, React Native, or similar)
• Solid understanding of cloud platforms, preferably AWS (Lambda, Dynamo
  
  DB, Cloud Formation)
• Experience with RESTful API design and implementation
• Demonstrated experience using AI coding assistants and tools to enhance productivity
• Curiosity and enthusiasm for exploring how AI can solve real-world problems
• Strong problem‑solving skills and attention to detail
• Ability to work collaboratively in a fast‑paced environment
• Excellent communication skills, both written and verbal

• Bachelor's Degree in Computer Science or related field (or equivalent experience)
• Experience with React Native/Expo for mobile development
• Familiarity with Next.js and modern web development practices
• Experience with Dynamo
  
  DB or other No
  
  SQL databases
• Knowledge of monitoring tools like Sentry
• Experience building or working with AI agents, LLM integrations, or automation systems
• Familiarity with prompt engineering and working with LLM APIs (OpenAI, Anthropic, etc.)
• Experience with Atlassian tools (Jira, Confluence)
• Familiarity with infrastructure as code (Cloud Formation, CDK)
• Experience in the fitness or wellness industry

• Competitive salary, based on skills and experience
• Bonus eligibility based on performance
• Monthly cell phone stipend
• 401k with employer match
• Health, dental, & vision insurance
• Flexible PTO
• Free drop in classes at [solidcore]
• And MORE

[solidcore] is a national boutique fitness company with 100+ studios across the country. Our signature workout is 50 minutes of low-impact, high-intensity strength training: the lights are low and the music is loud. The coach guides the class through a series of slow & controlled movements that are sequenced to work muscles to failure. This class is accessible for all fitness levels and can be amplified or modified to accommodate individual goals.

Class is as intense as our reviews suggest, but our instructors go above and beyond to provide a welcoming,…