Platform API Engineer (Full-Stack) — TS/Python & AWS

Eliassen Group; Greenwood Village (CO); Hybrid; Confidential; Full time

Benefits offered by this job

Medical, Dental, Vision benefits

401k with company matching

Life insurance

Job summary

Eliassen Group is seeking a Full Stack Software Engineer to design, build, and operate a modern API platform in a hybrid Greenwood Village, CO setup. You’ll own services end-to-end with OpenAPI contracts, strong testing, and AI-assisted workflows.

The role emphasizes TypeScript, Python, AWS, and DevOps practices, including automation, IaC, and CI/CD, with a strong focus on developer experience and platform reliability.

Qualifications

• TypeScript/Node.js for backend services with strong type system and API development.
• Python production experience with FastAPI or Django and PostgreSQL optimization.
• AWS services including Lambda, Step Functions, S3, SNS/SQS, Secrets Manager, CloudWatch, and RDS/Aurora.
• Infrastructure as code with AWS CDK and/or Terraform.
• GitLab CI/CD, automated testing, security scanning, and multi-stage deployment workflows; monorepo a plus.
• API engineering with OpenAPI/Swagger, OAuth 2.0, versioning, rate limiting, resiliency, and idempotency.
• Testing discipline with unit/integration coverage and automated quality gates.
• Observability with tools such as Splunk or Datadog and production troubleshooting.
• Regular use of AI coding assistants and effective integration into workflows.
• Collaboration and code reviews; clean version control practices.
• Preferred: functional programming concepts and frameworks like Effect.js, fp-ts, or ZIO.
• Preferred: Kubernetes/EKS with Helm, blue/green and canary strategies.
• Preferred: SRE practices including SLIs/SLOs, error budgets, incident response, toil reduction.
• Preferred: secure development, performance optimization, distributed systems.

Responsibilities

• Design, build, and operate APIs to OpenAPI standards with clear contracts and documentation.
• Develop backend services using TypeScript/Node.js and Python frameworks such as FastAPI or Django.
• Implement automation via infrastructure as code, CI/CD, testing, and deployment workflows.
• Own services from design through production support with measurable SLIs and reliability goals.
• Incorporate AI assistants for code generation, testing, documentation, and reviews.
• Implement observability with structured logging, metrics, dashboards, and alerts.
• Collaborate on system design, security, performance, and developer experience improvements.
• Support environment-based deployments and versioned, secure APIs with resiliency patterns.

Skills

TypeScript/Node.js

Python

AWS

CI/CD

Infrastructure as code

Testing

OpenAPI/Swagger

AI-assisted development

Observability

DevOps practices

Security & reliability

Collaboration & code reviews

Kubernetes

Tools

FastAPI

Django

PostgreSQL

GitLab CI/CD

Terraform

AWS CDK

Kubernetes

Helm

Job description

Eliassen Group is seeking a Full Stack Software Engineer to design, build, and operate a modern API platform in a hybrid Greenwood Village, CO setup. You’ll own services end-to-end with OpenAPI contracts, strong testing, and AI-assisted workflows.

The role emphasizes TypeScript, Python, AWS, and DevOps practices, including automation, IaC, and CI/CD, with a strong focus on developer experience and platform reliability.