Principal Engineer

Why This Role Exists We operate a multi‑tenant automotive SaaS platform serving thousands of dealer groups across the United States. Our backend — event‑driven serverless on AWS (Lambda, EventBridge, DynamoDB, S3, Step Functions) — orchestrates everything from dealer onboarding to inventory management to real‑time transaction processing. That platform works. Now we need to make it think. We are building agentic AI systems: autonomous, tool‑using agents that observe platform state, reason over dealer context, take action through production APIs, and learn from outcomes. These are not chatbots bolted onto a dashboard. They are first‑class platform services backed by AWS Bedrock, connected to production systems via MCP servers – that make decisions, execute workflows, and close loops without human intervention unless guardrails say otherwise. This Principal Engineer owns that entire surface. You are not advising on AI strategy from a whiteboard – you are writing agent code, defining tool interfaces, building evaluation harnesses, setting cost and latency budgets, and shipping production AI workflows that touch real dealers and real money. Scope & Scale 5000+ destination dealer tenants, each with isolated databases and per‑tenant configuration Billions in annual Gross Merchandise Value (GMV) flowing through platform transactions Tens of thousands of API requests per minute across REST, SOAP, and event‑driven integration surfaces Data pipelines spanning 6 integration domains with multi‑protocol vendor connectivity What You Will Own Ownership and core development of agentic AI systems — designing, building, and operating the AI agent infrastructure (AWS Bedrock, MCP servers) that powers intelligent automation across the platform. AI agent lifecycle end to end — from prompt engineering and tool‑use design through guardrails, evaluation, cost optimization, and production observability. System design and technical decision‑making for migration waves — from identity/tenant services through core domain extraction and frontend decomposition. The dual‑write framework, API Gateway traffic‑splitting, and per‑tenant feature flag rollout that make every migration step reversible. Cross‑cutting concerns: observability (OpenTelemetry, CloudWatch), security posture (Auth0 consolidation, IAM), and data architecture (DynamoDB single‑table design, Aurora consolidation). Mentoring and force‑multiplying senior ICs — establishing patterns, reviewing designs, and raising the technical bar across 5 engineering teams. Consolidate and strategize 30+ different integrations and make the future integrations easier. Technical Environment Cloud Services: High‑availability AWS stack including Lambda, EventBridge, DynamoDB, S3, ECS Fargate, Aurora, API Gateway, CloudWatch, and Secrets Manager. Development Languages: Modern Python and Java (Spring Boot) alongside TypeScript/React (Next.js 16) frontends, with legacy domain coverage in PHP/Laravel. AI & Agentic Systems: Advanced agentic workflow orchestration utilizing lean AWS Bedrock AgentCore, MCP servers, or LangChain/LangGraph frameworks. Data Engineering: Complex data architectures featuring DynamoDB single‑table design, MySQL/Aurora, S3 data lakes, Glue Data Catalog, Athena, and data pipelines. Infrastructure & Security: Enterprise‑grade CI/CD and observability via CloudFormation, Auth0 consolidation, OpenTelemetry, and CircleCI. Integration Surfaces: Multi‑protocol connectivity spanning REST, SOAP/XML, EventBridge event‑bus patterns, SES processing, and Playwright browser automation. First 12 Months Months 1‑3: Immerse in the codebase. Audit the current architecture across all stacks. Publish the first Architecture Decision Record (ADR) for the next migration wave. Establish your design review cadence with the team. Months 4‑6: Drive the AI/agentic integration layer — Bedrock‑powered automation in at least one production workflow. Establish the patterns for how the team builds with AI going forward. Months 7‑9: Own and deliver the first migration wave end‑to‑end — from design doc through production cutover with dual‑write validation. Stand up the observability baseline (OpenTelemetry instrumentation, dashboards, SLOs). Months 10‑12: Second migration wave in production. Architecture runway documented for the next 12 months. The team operates at a higher technical bar because of patterns you set. Requirements 8+ years of software engineering experience with at least 3 years in a Staff / Principal / Architect role. Build cloud‑native solutions with emphasis on speed to market. Deep hands‑on experience (About 40‑50% in the code, 40‑50% in Design) with AWS serverless (Lambda, EventBridge, DynamoDB, StepFunctions) and traditional service architectures (ECS, RDS, API Gateway). Experience spending 10‑20% of your time in mentoring, cross‑team alignment and operating mechanisms. Track record of leading monolith‑to‑services migrations — strangler fig, dual‑write validation, traffic‑splitting, canary rollouts. Fluency across multiple languages: you can review PHP, architect & prototype Python, architect Java services, and reason about TypeScript frontends. Experience with event‑driven architectures, configuration‑driven workflow engines, and DynamoDB single‑table design. Strong opinions on observability and the discipline to instrument before you migrate. The ability to write a design doc that a senior IC can implement without ambiguity, and the judgment to know when to write code yourself instead. Preferred Qualifications Automotive, fintech, or multi‑tenant marketplace platform experience. Experience with data pipelines (NiFi, Glue/Athena) or ETL/data lake tooling. Familiarity with Auth0 Organization model, M2M apps, and Actions for JWT enrichment. Experience with browser automation (Playwright) in production integration flows. Benefits A2Z Sync offers comprehensive medical, dental, and vision benefits. Employer provided STD/LTD and life insurance. Matching 401(k) plan. Unlimited paid time off, including 10 paid holidays. Real ownership of a high‑stakes AI surface – your roadmap, your architecture decisions, your metrics. #J-18808-Ljbffr A2Z