Senior Full Stack Engineer (Zurich-based, hands-on, ships fast) jobs in United States
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ComplexChaos · 3 months ago

Senior Full Stack Engineer (Zurich-based, hands-on, ships fast)

positionLake Zurich, IL
timeFull-time
remoteHybrid
senioritySenior Level
date5+ years exp

ComplexChaos is a pre-seed startup focused on creating an AI-native platform for managing complex decision-making processes. They are seeking a Senior Full Stack Engineer to build and ship features across their tech stack, contributing to both frontend and backend systems while ensuring the platform can scale effectively.

Computer Software
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H1B Sponsor Likelynote

Responsibilities

Ship full-stack features across our evolving tech stack: TypeScript/Node.js backends, Vue → Next.js frontend migration, Python AI services, and everything in between
Build AI-powered experiences that don't suck—chat interfaces, voice processing, insight generation
Own end-to-end features from database design to user interactions, because nothing beats understanding the whole flow
Navigate our platform migration from monolith to microservices while keeping everything running
Write code that scales with proper error handling, monitoring, and tests - because "it works on my machine" doesn't cut it with enterprise clients
Collaborate intensely with founders, designers, and other engineers to ship features that solve actual user problems

Qualification

Full-stack engineeringTypeScriptNode.jsAI/LLM integrationMicroservicesPostgreSQLAWSStartup experienceQuality-focused

Required

5-8 years of full-stack engineering experience with battle scars from shipping real products
Modern web stack fluency: You're comfortable with TypeScript, Node.js, React, PostgreSQL, AWS, and can pick up new tools fast
AI/LLM integration experience: You've built features with OpenAI APIs, handled embeddings, or worked with voice processing—bonus points if you've debugged why GPT-4 suddenly started giving weird responses
Microservices mindset: You understand service boundaries, API design, event-driven architectures, and why everything shouldn't be in one giant database
Startup survival skills: You've worked in fast-moving environments where priorities shift, requirements evolve, and 'MVP' actually means something
Zurich-based: We believe the best work happens when smart people can actually talk to each other
Quality-focused: You write tests, handle errors gracefully, and think about edge cases before they become production incidents

Company

ComplexChaos

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AI-mediated human cooperation
dateFounded in 2023
location
San Francisco, California, USA
people-size2-10 employees
web-link
https://www.complexchaos.ai/

H1B Sponsorship

ComplexChaos has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)

Funding

Current Stage
Early Stage
Total Funding
unknown
2024-01-01Seed
Company data provided by crunchbase