Senior Full Stack Developer

• Ready to help evolve a production-grade enterprise AI platform? Hybrid work model in the office located in Porto Alegre/RS.
• About the Role You will join the ADP Assist AI Platform team delivering nextgeneration conversational assistants and intelligent automation.
• Our AI and agent orchestration stack is live in production, serving real enterprise workflows and scaling to millions of interactions.
• Youll architect and build serverless services, low-latency GraphQL & event APIs, and AI agent orchestration capabilities that connect to Bedrock, OpenAI, Anthropic, and internal action agents.
• Youll shape multi-environment reliability, performance, security, and operational excellence across a large ecosystem of shared services, packages, and deployable units.
• Frontend work is a supporting slicenot the centerensuring rich conversational experiences surface the intelligence your services provide.
• What You''ll Do AI / Agent Orchestration: Create execution flows, tool/function calling, conversation state & memory models, and provider abstraction layers.
• Backend & APIs: Implement NestJS serverless (Lambda + API Gateway) services, scalable GraphQL schemas/resolvers, and focused REST endpoints.
• Data & Event Flows: Use event-driven patterns (pub/sub, async triggers) for orchestration, streaming responses, and action agent pipelines.
• Quality Engineering: Enforce TDD; expand Jest suites (unit, integration, contract) for Lambdas & GraphQL.
• Performance Optimization: Profile hot paths (invocation latency, cold starts, resolver timing), optimize caching & streaming strategies.
• Frontend Integration (Supportive): Enable conversational UI consumption via lightweight Stencil.
• js components & GraphQL patternskeep abstractions clean.
• Documentation & Architecture: Follow ADRs, sequence diagrams, API specs, and operational runbooks.
• Continuous Improvement: Refine coding standards, automate quality gates (ESLint, SonarQube), and evolve build/test acceleration for a large codebase.
• Key Responsibilities Architect and evolve AI agents & orchestration pipelines.
• Build and operate production NestJS Lambda services with Handlers & REST interfaces.
• Integrate LLM providers (AWS Bedrock, OpenAI, Anthropic) through unified capability interfaces (completion, tools, embeddings, moderation).
• Implement conversation state handling and instrumentation for traceability.
• Support integration of conversational UI components while keeping backend contracts stable & versioned.
• Maintain high automated test coverage and contract integrity (consumer/provider tests).
• Required Qualifications Experience: 8+ years professional full stack development with clear depth in backend architecture & distributed systems.
• Backend Core: NestJS (primary), Node.
• js, Express.
• js, GraphQL, REST API design, MongoDB operations.
• AI / LLM Integration: Hands-on with OpenAI/Anthropic and/or AWS Bedrock.
• Serverless & Cloud: Deployment of AWS Lambda, and event-driven patterns.
• Frontend (Supportive): Working knowledge of TypeScript, Web Components, and integrating framework-agnostic UI components.
• Architecture: Designing modular services and scalable API surface areas for a large multi-team codebase.
• Education: Bachelors degree in Computer Science / Engineering or equivalent experience.
• Preferred Qualifications Conversational AI design patterns (dialog state machines, memory strategies, streaming UX semantics).
• Agent orchestration (multi-model routing, tool chaining, fallback & retry semantics, guardrail enforcement).
• Real-time delivery (WebSockets, SSE, event streams) and token streaming optimization.
• Internationalization (i18n) & accessibility (WCAG) considerations.
• Performance tuning (cold start mitigation, bundle trimming, resolver latency, concurrency shaping).
• To Succeed In This Role Ownership: You treat services, pipelines, and quality gates as products you steward end-to-end.
• Deep Systems Thinking: Model latency, failure modes, and scaling characteristics before coding.
• Collaboration: Communicate clearly with AI/ML scientists, security, product, and UX partners.
• Curiosity: Track rapidly evolving LLM features and responsibly integrate them.
• You''ll Love Working Here Because You Can Build AI workflows.
• Deliver at scale with measurable reliability goals.
• Continuously learn in a fast-moving AI + serverless ecosystem.
• Contribute to social responsibility and inclusive culture initiatives.
• Join a company committed to equality, equity, and inclusive growth.
• A Little About ADP ADP provides global cloud human capital management solutionsspanning payroll, talent, time, tax, and benefitsunderpinned by largescale data, analytics, and compliance expertise.
• Innovation, client impact, and inclusive collaboration are core to how teams build and iterate.
• Diversity, Equity & Equal Employment Opportunity *O modelo de trabalho adotado pela ADP é office based/presencial, com a possibilidade de trabalho em home-office por até duas vezes na semana.

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