Senior Platform Engineer
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Job Description
Senior Platform Engineer at Loancrate developing platforms that enable product engineers to ship without performance concerns. Focused on AWS infrastructure, tooling, and security for mortgage workflows.
Responsibilities:
- Own and evolve our AWS infrastructure using Terraform and Pulumi Cloud - treating infrastructure as a product that engineering teams depend on.
- Design and maintain internal developer tooling and libraries that standardize how we build and ship - code generation, shared SDKs, data access patterns, and service scaffolding.
- Create and maintain golden paths for common workflows (new service setup, background jobs, event streams, APIs) so teams can ship quickly with built-in security and observability (and consistent defaults across services).
- Build and maintain CI/CD pipelines and per-PR ephemeral environments that make deploying feel easy and safe.
- Drive reliability through SLOs, auto-scaling, incident response, and postmortems - and build systems that make the next incident less likely.
- Create observability tooling and shared instrumentation libraries that give engineers real-time insight into their services.
- Enforce security best practices across IAM, secrets management, encryption, audit logging, and DDoS protection.
- Own the reliability and performance of our data platform (Aurora PostgreSQL) - provisioning, backups, failover, and tuning - and build tooling that makes safe usage the default.
- Reduce toil through automation and self-service tooling so engineers can move fast without waiting on the platform.
- Contribute to architecture decisions and documentation, and participate in on-call rotation (shared by the whole engineering team).
Requirements:
- Experience building internal platforms / developer tooling: code generation, CLIs, templates, shared SDKs, or frameworks that improve engineering velocity.
- Strong TypeScript skills and API design taste - you enjoy building stable primitives that other engineers rely on.
- Deep AWS experience across compute, networking, storage, and security (ECS, Lambda, VPC, ALB, IAM, RDS, ElastiCache, MSK, OpenSearch, S3, CloudWatch, CloudTrail, GuardDuty).
- Strong Terraform and/or Pulumi proficiency: modules, workspaces, and CI-driven plan/apply workflows.
- Experience designing and operating CI/CD systems that help large engineering teams ship frequently and confidently.
- Track record building production observability stacks (Datadog, CloudWatch, Sentry, distributed tracing, SLOs).
- You’ve built “paved roads” that bake in secure, reliable defaults (instrumentation helpers, policy-as-code, safe-by-default deployment patterns).
- Security-first mindset - you proactively harden infrastructure without slowing teams down.
- Aurora PostgreSQL operations at scale: backups, PITR, failover, read replicas, query tuning.
- Comfort with Docker and container orchestration environments.
- Reliability engineering mindset: SLOs, error budgets, incident response.
- Curiosity about the unique infrastructure demands of AI and LLM workloads.
- Strong written communication - you document decisions and help the team understand the systems they depend on.
Benefits:
- Health insurance
- 401(k) matching
- Flexible work hours
- Paid time off
- Remote work options
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