Siena - Fullstack Engineer

Remote. Posted 2 months ago

The role

You will own features and systems across the full stack, frontend, backend, and infrastructure. You will work with product to shape scope and make architectural decisions to ship reliable systems for consumer brands.

What you will do

Own features and systems across the full stack, frontend, backend, and infrastructure, from problem definition through production.
Partner with product to break down ambiguous scope and ship in iterative, high-impact releases.
Make real architectural and design decisions in your area.
Take cutting-edge language models into enterprise customer workflows.
Solve hard engineering problems including API performance, microservices, and scaling.
Maintain and improve AWS infrastructure with a DevOps mindset.
Share knowledge, review thoughtfully, and help teammates level up.

Required qualifications

5+ years of software engineering, with real ownership of systems you have shipped and run in production.
Strong full-stack engineer in Node.js, React, TypeScript, Express.
Solid with AWS (Fargate, Lambda, EC2, SQS) and with PostgreSQL and Redis.
Comfortable with CI/CD pipelines (CodePipeline, GitHub Actions, or similar).
Experienced with microservices and scalable systems.
Product-focused.
Shipped LLM-powered features to production.

Nice to have

Next.js
Infrastructure as Code (CDK, Terraform)
Python
Event-driven architecture
Background in customer support or CX software

Benefits

Real ownership
Work that ships and matters
Great salary plus equity or stock grants
Learning budget
Premium accounts (ChatGPT, Claude, Perplexity Pro, Cursor, Lovable)
Quarterly budget for new tools

Before you apply

Silver Screening Interview
Silver Technical Interview
Client Screening Interview
Client Takehome + Defense
Client Behavioral Interview

About the company

Siena is the Agent of Record for consumer brands. They collapse the disconnected tool stack into a single agent that owns the entire customer journey.