Senior Full-Stack AI Engineer (Kotlin/React)

Collaboration.Ai, Inc.; Minnesota; On-site; USD 150,000 - 190,000; Full time

Benefits offered by this job

Open-source involvement

Job summary

Collaboration.Ai, Inc. is seeking a hands-on senior software engineer to own features from database schemas to UI. You’ll ship production features across the full NetworkOS stack—Kotlin services and Next.js UI—ensuring reliability and scale for regulated enterprise environments.

This is a hands-on senior seat on a small team. You’ll mentor peers, contribute to architecture, and push the roadmap with every commit.

Qualifications

• 5+ years of professional software engineering experience, backend-weighted with real production frontend contributions.
• Strong proficiency in Kotlin and Spring Boot (or Java/Spring with willingness to adopt Kotlin).
• Working proficiency in TypeScript and React (Next.js preferred) — able to ship UI features within an established design system.
• Solid experience with Python and modern frameworks (FastAPI preferred).
• Experience with PostgreSQL, relational database design, and migration management.
• Proven track record in continuous delivery environments with automated testing.
• Hands-on Docker, Kubernetes, and AWS; strong grasp of microservices patterns, API design, and distributed systems.
• AI-native workflows — demonstrated ability to leverage Claude Code/Codex or similar agentic coding tools to accelerate development.
• US citizenship required (DoD contracting — IL4/IL5 environments — and FedRAMP compliance).

Responsibilities

• Deliver features end-to-end—own complete vertical slices (PostgreSQL schema, Kotlin service, GraphQL contract, Next.js UI) and ship production features without waiting on handoffs
• Own core API and service health—design and maintain GraphQL and REST APIs with clean domain boundaries, keeping latency low and reliability high under growing load
• Master the data layer—design PostgreSQL schemas, optimize queries for scale, manage zero-downtime migrations with Liquibase, and build effective caching strategies
• Ship with confidence—comprehensive test suites (unit, integration, contract, UI) at 80%+ coverage, with CI/CD quality gates that catch problems before production
• Build resilient systems—structured logging, distributed tracing, custom metrics, circuit breakers, and graceful degradation patterns
• Elevate the team—mentor mid-level and junior engineers through code reviews, architectural discussions, and pair programming
• Automate with agents—build agentic primitives that make everyday full-stack work faster; AI-native development is how we work, not a side experiment
• Frontend: Next.js (App Router), React, TypeScript; Turborepo; Tailwind CSS + shadcn/ui
• AI Integration: Python, FastAPI (LLM-powered service touchpoints)
• Security: AWS KMS, AWS Secrets Manager, Auth0

Skills

Kotlin

Spring Boot

TypeScript

React

Python

FastAPI

PostgreSQL

CI/CD

Docker

Kubernetes

AWS

GraphQL

AI-native workflows

US citizenship

Tools

GraphQL

PostgreSQL

Liquibase

AWS

Job description

Collaboration.Ai, Inc. is seeking a hands-on senior software engineer to own features from database schemas to UI. You’ll ship production features across the full NetworkOS stack—Kotlin services and Next.js UI—ensuring reliability and scale for regulated enterprise environments.

This is a hands-on senior seat on a small team. You’ll mentor peers, contribute to architecture, and push the roadmap with every commit.