Senior Software Engineer

Who We AreCollaboration.Ai is a mission-focused, AI-powered software and services company based in Minnesota, with employees, partners, and customers around the world. We unite people, technology, and purpose to accelerate breakthroughs that transform industries, empower communities, and create a more sustainable future. We collaborate with organizations across the defense ecosystem, helping them navigate complex challenges and drive transformative change.Our ProductsNetworkOS — NetworkOS is an AI-powered platform that aligns people, purpose, ideas, and expertise in real-time, generating actionable insights to propel movements forward.CrowdVector — CrowdVector is an integrated solution marketplace and innovation management platform that rapidly uncovers new ideas and advances breakthroughs to fuel movements.To learn more about us, visit collaboration.ai.About the RoleYou'll ship product across the full NetworkOS stack — Kotlin/Spring Boot microservices through Next.js/React interfaces — keeping the platform reliable, performant, and architected for 10x growth in regulated enterprise and defense environments.This is a hands-on execution seat on a small, senior team. You'll own complete vertical slices from database schema to UI, with no cross-team handoff gaps and no "not my layer" excuses. Your code commits move the roadmap — and your work is visible from day one.Whole-stack ownership. Production every week. Code that moves the roadmap.What You'll DoDeliver features end-to-end — own complete vertical slices (PostgreSQL schema, Kotlin service, GraphQL contract, Next.js UI) and ship production features without waiting on handoffsOwn core API and service health — design and maintain GraphQL and REST APIs with clean domain boundaries, keeping latency low and reliability high under growing loadMaster the data layer — design PostgreSQL schemas, optimize queries for scale, manage zero-downtime migrations with Liquibase, and build effective caching strategiesShip with confidence — comprehensive test suites (unit, integration, contract, UI) at 80%+ coverage, with CI/CD quality gates that catch problems before productionBuild resilient systems — structured logging, distributed tracing, custom metrics, circuit breakers, and graceful degradation patternsElevate the team — mentor mid-level and junior engineers through code reviews, architectural discussions, and pair programmingAutomate with agents — build agentic primitives that make everyday full-stack work faster; AI-native development is how we work, not a side experimentOur Tech StackBackend: Kotlin, Spring Boot, Ktor, Gradle; GraphQL (Netflix DGS); REST/OpenAPIFrontend: Next.js (App Router), React, TypeScript; Turborepo; Tailwind CSS + shadcn/uiData Layer: PostgreSQL, Liquibase, Kafka, DynamoDB, Amazon S3AI Integration: Python, FastAPI (LLM-powered service touchpoints)Infrastructure: Docker, Kubernetes (AWS EKS), Helm, ArgoCDCI/CD: GitHub Actions, Codecov, SnykObservability: DataDog (APM, logs, tracing), OpenTelemetrySecurity: AWS KMS, AWS Secrets Manager, Auth0What We're Looking ForMust-Haves5+ years of professional software engineering experience, backend-weighted with real production frontend contributionsStrong 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 s