Senior Software Engineer Full-stack

Job description

**InsightRX** | Engineering ## About the Role InsightRX is looking for a Full Stack Engineer to help build our Astra AI platform — a system that combines a modern web application with conversational AI agents to support pharmacokinetic/pharmacodynamic (PK/PD) analysis and clinical trial data workflows. You'll work across the client, server, and agent layers, understanding how they fit together end to end: how the frontend talks to the API, how the API queues and tracks work, and how LLM-powered agents process data and return results. This is a strong fit for someone who enjoys working across the stack, is comfortable navigating both traditional web application architecture and newer LLM-agent design patterns, and wants to build tools used directly in pharmaceutical R&D decision-making. ## What You'll Work On - Build and maintain features across our React/TypeScript client and NestJS/TypeScript backend, including UI components, REST APIs, and the data layer connecting them. - Design and extend the client-server architecture: state management, routing, authentication (including SSO/SAML), real-time updates via WebSockets, and background job processing via AWS SQS. - Collaborate on the integration layer between the web app and our LLM-based agents — message schemas, queue-based communication, and file/data handoff. - Work with our conversational AI agent system, which orchestrates multiple specialized agents for statistical modeling, data quality checks, and PK/PD analysis workflows. - Contribute to database schema design and migrations (PostgreSQL/Sequelize), API documentation (Swagger), and test coverage (Jest, pytest). - Participate in code review, architecture discussions, and production support across the stack. ## What We're Looking For - Strong professional experience building production level full stack web applications, comfortable owning features from database to UI. - Strong TypeScript skills across both frontend (React) and backend (Node.js/NestJS) contexts. - Experience designing REST APIs, relational data models (PostGresSQL, MongoDB), and authentication/authorization flows. - Familiarity with message-queue or event-driven architectures (SQS, similar). - Comfort reading and reasoning about systems that integrate with LLMs — understanding agent/tool patterns, prompt-driven workflows, and the practical quirks of working with LLM output, even without deep AI/ML research background. - Strong problem-solving, ownership, and ability to debug across web applications and nondeterministic AI behavior. - Uses Claude Code, Codex, or similar AI coding tools effectively while understanding, validating, and taking responsibility for the resulting code. - Good instincts for reliability and correctness in domains where data quality matters — you ask "what happens when this fails or the data is malformed." - Clear communicator, comfortable working across an evolving codebase with detailed technical documentation. - Operate with a high level of independence and cope with ambiguity ## *Nice to Have* - Experience with LLM agent architecture a plus - Experience with SAML SSO, multi-tenant systems, or healthcare/life-sciences software.