Full-Stack Engineer
New York, New York, United States
$120k-$120k / year
đ Tech Stack
đź About This Role
What we're building
We're empowering small teams with technology that makes it easier to market and grow businesses. Our current focus is to help consumer brands shift from "workflow automation" to "agent management" within their marketing operations. Shadow is the AI coordination layer â providing shared AI memory, centralized agent control, and model orchestration for marketing teams.
ÂWhy join Shadow?
Product Ownership You'll ship production code daily and help steer key product and technical decisions.
Shape the Engineering Culture You'll influence how we workâtools, processes, standards, and hiring.
Work with Challenger Consumer Brands Talk directly to customers (CEOs, CMOs, VP's) of fast-growing consumer brandsâsome doing $80Mâ$500M in revenue.
The agency behind the product
Shadow is built alongside Darkroom â a performance marketing agency that's been operating for 10 years, employs 100+ people, runs 100+ clients at a time, and has worked with over 1,000 consumer brands. The agency is both our proving ground and our first user, which means the data you build with is real marketing data at real volume from day one â not a synthetic demo.
The role
You'll sit squarely at the intersection of backâend and frontâend, ensuring seamless integration between APIs, databases, UIs, and ML services. You'll design, build, and scale features endâtoâend, especially our AI/MLâpowered experiences, while mentoring peers and driving architecture decisions.
Core Tech & Tools
Languages & Frameworks: Python, Node.js, React (TypeScript)
Datastore: PostgreSQL
Cloud & Infra: Google Cloud Platform, Airflow, Terraform, Docker, Kubernetes
ML/AI: LLMs, RAG, prompt engineering
What you'll own
Architect and implement fullâstack features, from database schema to React components, optimized for scale and reliability.
Build and maintain RESTful/GraphQL APIs, data pipelines, and distributed services in GCP.
Integrate, prompt, and debug LLMs and generative AI tools; own RAG or fineâtuning pipelines.
Ensure frontâend and backâend systems interoperate flawlessly, minimize friction, optimize data flow, and enforce contracts.
Collaborate with product, research, design, and infra teams to define requirements, iterate rapidly, and ship productionâgrade code.
Monitor performance, reliability, and security.
Mentor junior engineers through code reviews, architecture reviews, and shared best practices.
Must haves
5+ years of professional software engineering experience with endâtoâend ownership in a fullâstack role.
Deep expertise in Python, Node.js, React/TypeScript, and PostgreSQL.
Able to be handsâon with GCP, containerization (Docker/K8s), and building/supporting highâtraffic systems.
Proven experience integrating AI/ML models (LLMs, NLP, RAG) into production apps.
Familiarity or strong interest in working with MCP servers.
Exceptional problemâsolving skills and a product mindset: you think deeply about UX, performance, and business impact.
You sweat both technical details and end-user experience.
Nice to haves
Experience with multiâstep or agentic AI workflows.
Background in AI infrastructure or tooling companies.
Contributions to openâsource AI/ML projects.
What we offer
Competitive salary (roles, responsibilities, and comp grow as we do)
Top-tier health, vision, and dental insurance (US)
Regular team off-sites
Regular hack weeks
Compensation
Yearly compensation for this role is $120,000. Actual compensation will be determined based on experience, skills, and qualifications. This role is also eligible for performance-based compensation. A summary of benefits is listed above.
 ÂEqual Opportunity Statement
We are an equal opportunity workplaceâwe are dedicated to equal employment opportunities regardless of race, color, ancestry, religion, sex, national orientation, sexual orientation, age, citizenship, marital status, disability, gender identity, or Veteran status. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements.