Fullstack Developer Intern

Job Description Numatix is seeking a driven and talented Fullstack Developer Intern with strong skills in Next.js, React.js, TanStack, TypeScript, Tailwind CSS, Node.js, Express, FastAPI, ORM frameworks, Python, Rust, and C++ (highly preferred). This internship offers a hands-on opportunity to work on high-performance UI, scalable backend systems, data pipelines, and production-grade applications. You will collaborate closely with our engineering and product teams to build visually stunning interfaces, real-time graphing systems, analysis dashboards, and lightning-fast backend services that power mission-critical trading and analytics applications. This three-month, fully remote internship offers hands-on experience in building scalable fullstack systems, designing high-performance APIs, working with modern frameworks, and contributing to the development of our upcoming strategy marketplace and internal platforms. Key Responsibilities Frontend Development - Build beautiful, responsive, and high-performance UI screens using Next.js, React.js, TanStack, TypeScript, and Tailwind CSS. - Develop advanced graphing and visualization tools for analytics and trading systems. - Work with designers to transform concepts into clean, elegant, interactive user experiences. - Optimize rendering performance for real-time data applications. Backend Engineering - Build and maintain high-speed backend services using Node.js, Express, FastAPI, and relevant ORMs. - Develop data ingestion and transformation pipelines capable of handling large volumes of real-time data. - Implement GraphQL APIs for seamless integration with broker connectors and internal systems. - Contribute to building scalable, production-grade backend modules. Systems & Performance - Work with Python, Rust, or C++ to build low-latency system components (highly preferred). - Optimize backend workflows, caching, and data flow for performance-sensitive environments. - Contribute to the company's core technology stack and long-term architectural decisions. Requirements - Educational Background: A Bachelor's degree (or working toward one) in STEM, Statistics, Econometrics, or Quantitative Finance. - Fullstack Fundamentals: Strong understanding of React, Next.js, JavaScript/TypeScript, and modern frontend + backend development workflows. - Backend Proficiency: Solid grasp of Node.js, Express, FastAPI, API design, and working with ORMs for database operations. - Systems Engineering Interest: Strong willingness to learn or work with Python, Rust, and C++, especially for performance-critical systems and data pipelines. - UI & Performance Mindset: A passion for building fast, beautiful, and high-performance interfaces, including graphing dashboards and analytics screens. - Problem-Solving Ability: Ability to break down complex UI/UX and backend architectural challenges and build efficient, reusable, scalable solutions. - Technical Curiosity: Eagerness to explore advanced topics such as server components, state management patterns, optimization techniques, concurrency, GraphQL, and real-time data systems. - Adaptability: Comfortable working in a rapid development environment, iterating quickly, and handling both frontend and backend responsibilities. - Communication: Ability to clearly articulate design, architectural, and technical decisions within the team. Preferred Skills - Experience with charting and visualization libraries (Recharts, D3.js, ECharts, Plotly, TradingView charts, etc.) - Familiarity with design systems, component abstractions, and scalable UI architecture - Understanding of API integration, WebSockets, and data fetching patterns using TanStack Query - Exposure to Next.js App Router, Server Actions, and modern React features - Experience building or integrating GraphQL APIs - Basic understanding of microservices, caching, or high-speed data pipelines - Knowledge of Rust or C++ for low-latency systems is highly preferred - Understanding of UX principles, responsive design, and UI performance profiling Who Should Apply - Students or recent graduates interested in fullstack development across UI, backend, and systems engineering - Individuals passionate about building clean, high-performance, production-grade applications - Developers who enjoy solving complex UI/UX and backend challenges - Self-starters who want deep hands-on experience across React, Next.js, APIs, real-time systems, and high-speed infrastructure - Engineers looking to work on real products, including dashboards, graphing tools, pipelines, and internal production systems Benefits - Competitive stipend - Hands-on experience building real, high-performance production systems - Learn fullstack development using industry-leading tools and workflows. - Close mentorship from experienced engineers. - Opportunity for a full-time offer based on performance. - Exposure to high-performance computing and real-time application design. How to Apply Upload your updated resume, complete the pre screening test, and join our Discord channel for more such opportunities: Join Our Discord. We look forward to seeing your talent in action Numatix is an equal-opportunity employer. We encourage applicants from all backgrounds to apply.