[Remote] Mid Level Fullstack Engineer (React/Front End focus)

Note: The job is a remote job and is open to candidates in USA. Colossus Technologies Group is a high-growth SaaS company building AI-powered products, and they are seeking a Mid-level Fullstack Software Engineer to join their fast-moving team. This role focuses on front-end development using React/TypeScript while also contributing to backend services with Node.js/Express/Nest, working collaboratively to ship features end-to-end.ResponsibilitiesBuild and maintain production React/TypeScript frontends, translating product requirements into clean, reusable components and flowsImplement responsive UI and state management, integrating with REST/JSON or GraphQL APIs and handling auth, error states, and performance optimizationsContribute to backend services using Node.js with Express and/or Nest.js, including API endpoints, business logic, and integrations with third-party services and internal AI servicesWork on AI-powered product features (e.g., integrating existing AI/ML services, orchestrating prompts, wiring up model outputs into UX) in collaboration with senior engineersWrite maintainable, well-tested code, participate in code reviews, and help improve our engineering standards, tooling, and CI/CD practicesCollaborate cross-functionally with Product, Design, and other engineers to scope work, estimate effort, and deliver features in iterative releasesSkills2+ years of professional software engineering experience building web applications in a production environmentStrong hands-on experience with React in production (hooks, component composition, state management, performance optimizations)Experience with TypeScript, modern JavaScript (ES6+), HTML, and CSSPractical backend experience with Node.js plus at least one of: Express or Nest.js (building APIs, working with middleware, integrating data sources)Experience working on AI-related products is strongly preferred (this could be integrating third-party LLM APIs, building AI-assisted workflows, or contributing to ML/GenAI-backed features)Familiarity with relational or NoSQL databases and basic data modeling (e.g., Postgres, MySQL, MongoDB, DynamoDB)Comfortable using Git and collaborating in a modern dev workflow (pull requests, code reviews, feature branches, CI/CD)Strong communication skills and the ability to work effectively with a distributed, cross-functional teamExperience with Next.js or similar React frameworksExposure to cloud platforms (AWS, GCP, or Azure) and containerization (Docker)Familiarity with design systems, component libraries, and front-end performance profilingPrior experience in a startup or fast-paced product environment, especially shipping AI or data-heavy featuresCompany OverviewAt Colossus Technologies Group, we provide top-tier cybersecurity and digital trust staffing, IT consulting, and project management solutions, including privacy, security, and GRC SaaS platform solution implementation. It was founded in 2021, and is headquartered in Boston, Massachusetts, US, with a workforce of 2-10 employees. Its website is https://colossustg.com.