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**Job Title:** Full-Stack Tech Lead (Remote, Contract)
**Company:** INFUSE
**Location:** Georgia (Remote)
**Responsibilities:**
* Harden CI/CD (GitHub Actions or Jenkins); build/test containers and deploy via Helm to AWS (EKS or ECS).
* Add lightweight bot protection: rate limits, IP allowlists, and abuse detection hooks.
* Implement observability: monitor latency/error budgets via CloudWatch + Grafana, structured logging, tracing where needed.
* Conduct performance tuning: DB indexes, caching strategy, queue throughput, API response times.
* Own architecture decisions and maintain a pragmatic approach (“simple first, scalable where it matters”).
* Drive code quality through reviews, standards, branching/release hygiene, and definition of done.
* Break down work, estimate reliably, unblock the team, and align with PM/BA on scope.
* Mentor engineers (frontend + backend) and foster a strong engineering culture centered on clarity and ownership.
**Requirements:**
* Experience building backend systems with .NET in production.
* Hands-on experience with PostgreSQL and Redis.
* Practical experience with React (TypeScript, MUI).
* API design and maintenance using OpenAPI 3.
* CI/CD experience with GitHub Actions.
* Experience with queues and schedulers such as SQS, EventBridge with Lambda, or Celery.
* 3+ years of experience building production systems.
* 2+ years of experience in a lead or ownership role.
* Strong Python backend experience (Flask/FastAPI), including API design, auth, and DB modeling.
* Real-world experience running systems in production, including CI/CD, Docker, AWS, monitoring, and incident management.
* Deep understanding of RBAC, session/auth flows, and security basics (OWASP-minded).
* Comfortable with async/event-driven patterns: queues, schedulers, retries, idempotency.
* Ability to provide clear documentation, articulate tradeoffs, and keep stakeholders informed.
**Nice to Have:**
* Experience with Grafana + Prometheus + Loki.
* Good React/TypeScript skills (component architecture, state management, UX for admin tools).
* Semantic search/retrieval experience (vector search, RAG patterns, ranking, evaluation).
* Experience with OpenSearch/Elasticsearch, pgvector, or similar search stacks.
* Familiarity with crawlers/scrapers, content pipelines, and anti-abuse patterns.
* Infrastructure as Code (Terraform/CDK), multi-environment deployments, feature flags.
* Experience designing audit trails, moderation/review workflows, and analytics events.