[Remote] Full Stack Developer

Note: The job is a remote job and is open to candidates in USA. Quantiphi is an award-winning, AI-First digital engineering and consulting company focused on delivering high-impact Services and Solutions. They are seeking a Full Stack Software Developer to design and build scalable, high-performance applications that power next-generation Agentic AI platforms, collaborating closely with AI/ML teams to integrate advanced workflows into production-grade applications.ResponsibilitiesDesign and build scalable full stack applications using React, TypeScript, and Next.js on the frontend and Python (FastAPI) and/or Node.js on the backendArchitect and maintain RESTful APIs and microservices with strong versioning, backward compatibility, and API-first design principlesDevelop distributed systems leveraging event-driven architectures, messaging systems (Kafka, Pub/Sub), and asynchronous processingBuild and integrate LLM-powered applications, including RAG pipelines, agentic workflows, and tool-calling frameworks (LangChain, LangGraph)Collaborate with AI/ML teams to integrate model serving platforms and orchestrate multi-agent systemsImplement real-time capabilities using WebSockets, Server-Sent Events (SSE), or streaming frameworksEnsure high-quality engineering standards across testing (TDD/BDD), CI/CD pipelines, and infrastructure-as-codeDeploy and manage cloud-native applications on GCP and/or Azure, leveraging Docker and KubernetesChampion observability and monitoring using logging, metrics, and tracing (e.g., OpenTelemetry)Build developer-friendly tools including SDKs, documentation, and API portalsMentor engineers and contribute to system design, architecture reviews, and best practicesSkills5–10 years of experience in full stack software developmentStrong expertise in: Frontend: React, TypeScript, Next.jsBackend: Python (FastAPI) and/or Node.jsProven experience building REST APIs, microservices, and distributed systemsHands-on experience with PostgreSQL and data modelingExperience with Docker, Kubernetes, and cloud platforms (GCP and/or Azure)Strong knowledge of CI/CD pipelines (GitHub Actions or similar)Experience with API lifecycle management (authentication, versioning, rate limiting)Solid understanding of system design, scalability, and performance optimizationExperience integrating or building applications with LLMs, RAG, or Agentic AI systemsFamiliarity with LangChain, LangGraph, or similar frameworksExperience with: LlamaIndex, advanced LangGraph workflows, or multi-agent orchestrationPrompt engineering and context engineeringModel Context Protocol (MCP) or agent interoperability frameworksExposure to GraphQL, gRPC, and advanced API design patternsExperience with event-driven systems (Kafka, Pub/Sub, Redis)Knowledge of vector databases (pgvector, Pinecone, Milvus)Experience building real-time/streaming UIs (WebSockets, SSE)Understanding of OAuth 2.0, OIDC, RBAC for secure systemsStrong testing practices (TDD, Playwright, contract testing)Experience with OpenTelemetry or similar observability toolingFamiliarity with Domain-Driven Design (DDD) and API-first architectureBenefitsMake an impact at one of the world’s fastest-growing AI-first digital engineering companies.Upskill and discover your potential as you solve complex challenges in cutting-edge areas of technology alongside passionate, talented colleagues.Work where innovation happens - work with disruptive innovators in a research-focused organization with 60+ patents filed across various disciplines.Stay ahead of the curve immerse yourself in breakthrough AI, ML, data, and cloud technologies and gain exposure working with Fortune 500 companies.Company OverviewQuantiphi is a digital engineering company that provides data science and machine learning software and services. It was founded in 2013, and is headquartered in Marlborough, Massachusetts, USA, with a workforce of 1001-5000 employees. Its website is http://www.quantiphi.com.Company H1B SponsorshipQuantiphi has a track record of offering H1B sponsorships, with 2 in 2026, 45 in 2025, 65 in 2024, 45 in 2023, 94 in 2022, 71 in 2021, 46 in 2020. Please note that this does not guarantee sponsorship for this specific role.