Senior Full Stack Engineer-(Python + React)

About TartanHQ TartanHQ is an AI-first enterprise-tech company backed by 500 Global, Info Edge Ventures, and AngelList. We've raised $8.5M and are rapidly scaling toward profitability. Our platform powers operations for India's leading financial institutions including HDFC Bank, Bajaj Allianz, Care Health, Yes Bank, and 50+ enterprises. We provide three core products: HyperVerify (80+ verification APIs), HyperSync (unified APIs for HRMS/ERP/CRM), and HyperApps (AI agents for insurance, banking, and compliance automation). Role Overview We are seeking a Senior Full Stack Engineer with 4-7 years of experience to build end-to-end features for TartanHQ's HR/payroll platform. You will own the complete feature lifecycle from backend API design to responsive frontend implementation, collaborating with product, design, and QA teams. Your expertise in both Python and React/Next.js will be critical to delivering seamless user experiences. Key KPIs Sprint delivery utilization: >90% End-to-end feature delivery: 1 feature/month Pull request reviews: 100% coverage Test coverage: >80% Day-to-Day Responsibilities Your week includes: backend API development and frontend implementation, code reviews and design discussions, sprint planning and standups, testing and debugging, and collaborating with product on feature specifications. You'll work on features spanning the entire stack within 2-week sprints. Core Responsibilities Backend Development (40% time allocation) Design and implement REST APIs using Django, FastAPI, or Flask Develop PostgreSQL database schemas and optimize queries Implement authentication, authorization, and security best practices Write maintainable backend code with comprehensive tests Deploy backend services using Docker and CI/CD pipelines Frontend Development (40% time allocation) Build responsive UIs using React or Next.js with TypeScript Implement state management with Redux, Zustand, or Context API Create pixel-perfect designs with CSS-in-JS or Tailwind CSS Optimize frontend performance and Core Web Vitals Write unit and integration tests using Jest and Cypress Quality & Collaboration (20% time allocation) Review peer code for quality and architectural consistency Participate in design-driven development practices Work with QA to ensure comprehensive test coverage Document APIs and frontend components Required Skills & Qualifications 4-7 years of full stack development experience B.Tech in Computer Science or related field Expert-level Python with Django, FastAPI, or Flask Expert-level React or Next.js with TypeScript Strong understanding of state management patterns Solid PostgreSQL/MySQL database skills Experience with REST API design principles Proficiency with responsive design and CSS Experience with Jest, Cypress, or similar testing frameworks Hands-on Docker and CI/CD experience Preferred Skills Experience with AI/ML model integration GraphQL or similar query language experience Server-Side Rendering (SSR) and Static Site Generation (SSG) Design systems and component library development Performance optimization and Web Performance APIs What We Look For Ownership: You take responsibility for complete feature delivery Versatility: You think holistically across the stack User empathy: You care about end-user experience and performance Growth: You continuously learn new technologies Communication: You collaborate effectively and document thoroughly Reporting To Engineering Manager