AI Vibe Coder
Worldwide
Let's be clear up front: this is not about pretty landing pages or front-end mockups. I build full enterprise-grade products — real backends, data layers, integrations, auth, infrastructure, the hard stuff that has to actually work under load and not break. Here's what's possible with the right approach: I recently built a product that a team of 53 engineers spent 3 years building — except theirs was buggy, slow, and constantly breaking. I built a superior, production-grade version myself in one month. That's 159 engineer-months of work, done in 1. I do it by building on my own stack — assembled from open-source AI infrastructure, agent runtimes, and tooling I've wired together — orchestrating AI agents and the best open components instead of hand-typing every line. I need someone who already works this way — ideally faster and sharper than me — who can plug into my stack and build serious systems at this velocity. If you only do front-end vibe pages, this isn't for you. If you can architect and ship complete enterprise systems — fast — using agents, pipelines, and open-source building blocks, keep reading. What You'll Do - Architect and ship enterprise-grade products end to end: backends, databases, APIs, integrations, auth, infrastructure — not just UI. - Build in a fast-moving codebase using AI-native development and a self-hosted, open-source–based agent stack. - Integrate and adapt open-source AI infrastructure — agent runtimes, LLM observability, memory/RAG systems, local and self-hosted model tooling. - Take loosely-specified goals and drive them to working, verified, production-ready code — design, implement, test, iterate — with minimal hand-holding. - Replace what would normally take a team — and do it cleaner: solid architecture, clean commits, real tests, no silent technical debt. - Improve the stack and workflow itself — better orchestration, better automation, better leverage. You Must Have - Proven, extreme-velocity AI-assisted development on real systems — not toy apps or templates. Show me what you've shipped and how fast. I'm not impressed by "10x" — I'm looking for people who collapse team-years into days on production-grade software. - Real engineering depth. System design, data modeling, APIs, state management, performance, security — you understand what makes enterprise software hold up, not just look good. - Strong fundamentals. You can read and debug code you didn't write. AI accelerates you; it doesn't replace your judgment. - Comfort assembling open-source components: self-hosting services, wiring APIs together, making independent tools work as one system. - Full-stack fluency: TypeScript/Node, Python, Git, APIs, databases, deployment. - Agent/LLM literacy: tool use, prompt engineering, RAG, multi-agent patterns, model selection (including open-weight and local models). - Bias to ship. You verify your work (tests, actually running the app) before claiming it's done. Speed and reliability — the incumbents were fast at neither. Bonus Points - Experience self-hosting agent frameworks, LLM observability, vector stores, or local model inference. - You've built your own automations, agent pipelines, or custom tooling on top of open-source. - You've shipped or maintained software at real scale and can speak to what broke and why. How to Apply (filters out the noise) Don't send a generic proposal. In your first message: 1. Link to the most complex, real system you've built fast — repo, demo, or video. Front-end-only portfolios will be passed over. 2. Tell me your exact stack/workflow: which open-source tools you use and how you orchestrate them. 3. One sentence: the most ambitious thing you've built solo, and how long it took. Applications without these three things get ignored. 1. Core Engineering (non-negotiable) These are the fundamentals that separate "ships real systems" from "ships demos." - System architecture & design — service boundaries, data flow, choosing the right pattern for the job, designing for change. - Backend engineering — APIs (REST/GraphQL), business logic, background jobs, queues, caching. - Data layer — relational (Postgres) + NoSQL, schema/data modeling, migrations, query performance, transactions. - Auth & security — authentication/authorization, secrets management, input validation, common vuln classes (the stuff enterprise buyers audit for). - Full-stack fluency — TypeScript/Node and Python at minimum; able to do front-end when needed but not only front-end. - Testing & verification — unit/integration/e2e, actually running the app before declaring done. - Git & version control discipline — clean commits, branching, code review hygiene. 2. AI-Native Development (the differentiator) This is what makes the velocity possible. Without this, they're just a normal good engineer. - AI-orchestrated coding workflow — power user of agentic coding, not a casual prompter; knows how to drive an agent to a correct result and catch when it's wrong. - Prompt engineering — structured prompts, context management, getting reliable output from models. - Multi-agent orchestration — chaining/parallelizing agents, pipelines, task decomposition, verification loops. - Tool use / function calling — wiring models to real tools and APIs. - RAG & memory systems — vector stores, embeddings, retrieval design, knowledge/context management. - Model selection & tradeoffs — knowing which model for which task, including open-weight and local models. 3. Infrastructure & Open-Source Integration (your stack-specific need) This is the part that's unique to how you work — assembling a stack rather than renting one. - Self-hosting & DevOps — Docker, deployment, environment config, running services yourself. - Open-source integration — reading unfamiliar codebases, adapting/forking OSS, making independent tools work as one system. - Agent runtimes — experience with self-hosted agent frameworks. - LLM observability — tracing, logging, dashboards (e.g. self-hosted observability tooling). - Local model inference — running open-weight models locally, quantization, serving. - API/service glue — connecting third-party and internal services reliably. 4. Judgment & Working Style (what makes it enterprise-grade and not a mess) Easy to overlook, but this is what separates "fast and breaks everything" from your actual result. - Debugging code they didn't write — including AI-generated code; can find the silent failure. - Knowing when AI is wrong — healthy skepticism, verification instinct, doesn't ship hallucinated logic. - Bias to ship + bias to correctness simultaneously — speed without leaving technical debt landmines. - Working from loose specs — turns vague intent into the right thing without hand-holding. - Self-direction — operates independently at high velocity; doesn't need to be managed task-by-task.
- More than 30 hrs/weekHourly
- 6+ monthsDuration
- ExpertExperience Level
- Remote Job
- Ongoing projectProject Type
Skills and Expertise
Activity on this job
- Proposals:50+
- Last viewed by client:2 weeks ago
- Interviewing:1
- Invites sent:0
- Unanswered invites:0
About the client
- JapanTokyo5:10 AM
- $1.8M total spent577 hires, 19 active
- 84,750 hours
- Real EstateLarge company (100-1,000 people)
Explore similar jobs on Upwork
How it works
Create your free profileHighlight your skills and experience, show your portfolio, and set your ideal pay rate.
Work the way you wantApply for jobs, create easy-to-by projects, or access exclusive opportunities that come to you.
Get paid securelyFrom contract to payment, we help you work safely and get paid securely.
About Upwork
- 4.9/5(Average rating of clients by professionals)
- G2 2021#1 freelance platform
- 49,000+Signed contract every week
- $2.3BFreelancers earned on Upwork in 2020
Find the best freelance jobs
Growing your career is as easy as creating a free profile and finding work like this that fits your skills.
Trusted by