NodeJS/Bun AI API Backend

@AwaisChaudhry

Hi there, I’m Muhammad Awais, a Node.js developer with Bun runtime experience and a focus on API-first products. I will design and implement scalable REST endpoints on Bun, with an AI layer that can wire in toolchains like OpenAI, Hugging Face, and LangChain or any stack you prefer, so model calls, prompt templates, and even fine-tuning workflows are part of the API layer from day one. I’ll provide clear tests and documentation, work in GitHub with conventional commits and small, reviewable PRs, and supply a reproducible local setup so future contributors can jump in fast. I’m aligned with California daylight hours for stand-ups and review windows to keep momentum, and I’ll overlap for at least four hours daily as requested. Acceptance criteria will be met: endpoints run on Bun with local setup instructions; AI-enabled routes return expected results on test prompts; unit and integration tests pass in CI; and the codebase is lint-clean with at least 80% automated test coverage. Which AI toolchains do you prefer to start (OpenAI, Hugging Face, LangChain) and any constraints on model usage or data privacy? What is your preference for REST vs GraphQL, and in what scenarios would you justify GraphQL? What is your target hosting and CI/CD setup, and any constraints on Bun quirks or environment parity? What are the authentication, rate limits, and security requirements for the API? Do you already have test prompts and expected results, or should I create a baseline for validati

@shrec

Hello I have just read your job description carefully. I am an experienced Node.js developer and have worked with modern runtimes including Bun. I am confident in my ability to build your API-only product, integrating AI toolchains such as OpenAI, Hugging Face, or LangChain directly into your business logic for reliable and fast functionality. I can collaborate closely during California daylight hours, participating in stand-ups, code reviews, and quick iterations to maintain rapid development momentum. Please send me a message so that I can start working on your project immediately. Thank you

@augurstech

A Warm Hello! We are readily available to start working on this project! We’d be excited to partner with you on launching this API-only, AI-driven product, built natively in NodeJS on the Bun runtime. We are having strong experience in production APIs, emerging runtimes, and AI toolchain integration, we’re well aligned with both the technical ambition and the fast-moving collaboration style you described. We can start with a short technical alignment call and immediately propose a first sprint covering architecture setup, Bun configuration, and initial AI endpoints. Looking forward to collaborating and building something impactful together. Best regards, Aba

@tangramua

Dear Bhaskarpillai G.,   We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time.   We are 25 years in this business and our technical specialists have strong experience in JavaScript, Node.js, AngularJS, Git, API Development, OpenAI, Hugging Face, LangChain and other technologies relevant to your project.   Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews.   Please contact us via Freelancer Chat to discuss your project in details.    Best regards, Sales department Tangram Canada Inc.     

@diektech

Hi, this is Elias from Miami. I’ve reviewed your project and understand you’re looking for a NodeJS API built on Bun with AI functionality embedded directly into the business logic—leveraging OpenAI, Hugging Face, LangChain, or similar. The goal is a fast, scalable, well-tested API with clear documentation for future contributors. I’ve built production-grade NodeJS APIs before and am comfortable with Bun’s runtime quirks. I can design REST (or GraphQL if justified) endpoints, integrate AI models and prompt workflows, and ensure everything runs reproducibly locally. Clear unit/integration tests, lint-clean code, and CI-ready setups are standard parts of my workflow. I’m also used to overlapping schedules for code reviews, stand-ups, and quick iterations while maintaining async progress on tasks. A few questions to align early: Q1: For AI integration, do you envision mostly synchronous model calls per request, or is background processing/queueing for heavy tasks acceptable? Q2: Are there preferred AI frameworks or models you want prioritized, or is flexibility to pick the fastest reliable option preferred? Q3: For testing, do you want mocked AI responses, real API calls, or a combination for unit vs integration tests? Happy to help get this API up fast, scalable, and test-covered from day one. Regards, Elias

@AbdullhSkeen

With five years as a full-stack developer, including extensive experience in Node.js and API development, your project is right up my alley. Combining my mastery of the MERN stack with my ability to navigate and exploit the unique quirks of the Bun runtime, I'm poised to implement your API-only product with precision.

@shaktistanwar

With over 15 years of experience in software architecture and full-stack development, I have all the necessary skills to successfully complete your NodeJS/Bun AI API backend project - and more. I have a solid background in JavaScript, making me highly proficient in NodeJS. This will ensure that I can design and implement efficient, scalable REST or GraphQL endpoints on Bun for you. What further separates me from other candidates is my understanding of the importance of blending cutting-edge technologies - like artificial intelligence - into solid business logic. Your project calls for AI integration skills, and I've got them. Having worked with OpenAI, Hugging Face, and LangChain in the past, I am well-versed in seamlessly incorporating AI functionalities into existing systems. Not only can you rely on me to deliver quality code on time, but you can also expect comprehensive documentation and tests as per your requirement for easier future maintenance. Additionally, my proficiency with GitHub ensures structured workflows with small, reviewable pull requests using conventional commits. Let's schedule a conversation to discuss how we can combine my expertise with your vision to create an exceptional API-only product that exceeds your expectations.

@ZohaibRoy

⭐⭐⭐⭐⭐ Build Fast NodeJS APIs with AI Features Under Bun Runtime ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project requirements and see you are looking for a NodeJS API developer. You have no need to look any further as Zohaib is here to help you! My team has successfully completed 50+ similar projects for API development. I will create scalable REST or GraphQL endpoints in NodeJS on the Bun runtime, embedding AI functionalities from the start to enhance your product. ➡️ Why Me? I can easily build your API with AI features as I have 5 years of experience in NodeJS development, API design, and AI integration. My skills include creating efficient endpoints, writing clear documentation, and ensuring robust testing. Additionally, I have a strong grip on GitHub workflows and collaboration tools, ensuring smooth project progress. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ NodeJS Development ✅ API Design ✅ Bun Runtime ✅ AI Integration ✅ RESTful Services ✅ GraphQL ✅ Unit Testing ✅ Documentation Writing ✅ GitHub Collaboration ✅ Continuous Integration ✅ Agile Methodologies ✅ Problem Solving Waiting for your response! Best Regards, Zohaib

@nikhilgarg96

Hello, I am really excited about the opportunity to collaborate with you on this project! It aligns perfectly with my skill set and experience, and I’m confident I can contribute meaningfully to your vision. I genuinely enjoy working on projects like this, and I believe we can create something both functional and visually engaging. Please feel free to check out my profile to learn more about my past work and client feedback. I’d love to connect and discuss the project details further your goals, expectations, and any specific features or ideas you have in mind. The more I understand your vision, the better I can bring it to life. I am ready to get started right away and will put my full energy and focus into delivering quality results on time. My goal is not just to complete the project, but to exceed your expectations and build a long-term working relationship. Looking forward to hearing from you soon! With regards! Nikhil

@ludiac

Hi, This is right in my lane. I’ve shipped production NodeJS APIs with AI layers (OpenAI, LangChain, vector-stores, prompt templates, embeddings, classification flows, etc.) and can build your Bun-based API with clean REST endpoints, CI testing, and conventional-commit Git discipline. I work overlapping PST, so daily stand-ups and fast PR cycles are no problem. I’ll deliver fully reproducible Bun setup scripts, documented AI routes and >80 % automated test coverage. Recent relevant backend/API automation work: https://www.freelancer.com/projects/azure/Azure-API-Development-for-Apps/reviews https://www.freelancer.com/projects/javascript/Car-kilometres-registration-system/reviews Let's discuss approach and timeline. Thanks.

@dfordesigners

Hi Bhaskarpillai G. I’m your web developer, ready to turn your project NodeJS/Bun AI API Backend into reality! I’d love to discuss the details and create something amazing together. Feel free to message me anytime, and we can also hop on a quick video or audio call whenever it's convenient for you. I’ve developed many projects exactly like what you’re looking for. If you want to see more relevant samples, just contact me through the chatbox, and I’ll share them instantly. ★ Why Clients Trust Me 500+ successful web projects delivered 430+ positive client reviews Expert in JavaScript, Node.js, AngularJS, Git, API Development, OpenAI, Hugging Face, LangChain WordPress, Shopify, PHP, JavaScript, HTML, CSS, Plugin/Theme Development, Laravel, WebApp Clean, modern, responsive and SEO-optimized designs Fast delivery, great communication, and long-term support Available during EST hours for smooth collaboration If you want a professional developer who delivers quality work on time and stress-free, let’s connect. I’m excited to help build something amazing for you. Best regards, Kausar Parveen

@stelianrosca618

Building your NodeJS/Bun API Backend with embedded AI functionality is a specialized task that calls for an experienced hand, and I believe I fit the bill perfectly. Over the past decade, I've honed my skills as a full-stack web developer which includes extensive work in NodeJS, Express and API development. I'm well-versed in working with runtime quirks and have the finesse to navigate even the most complex systems. In addition, I'm comfortable with async work and ready to offer at least four shared hours per day for productive collaboration during your daylight hours. What sets me apart from the pack is my experience in integrating AI technology into existing frameworks. As a full stack expert, I've worked on projects that required incorporating custom AI functionalities using popular libraries like OpenAI, Hugging Face, etc. Lastly, I greatly prioritize maintainability and future-proofing. This would reflect prominently in my work on this project as I'll put special efforts towards writing clear documentation and comprehensive tests - enabling smooth transitions and easy contributions for any future

@Herculesz

Hi The core technical challenge is building a high-performance API on Bun while embedding AI workflows directly into the business logic without sacrificing reliability or testability. I develop NodeJS APIs optimized for Bun, with clean module boundaries that avoid runtime quirks and keep execution predictable. The solution exposes well-structured REST endpoints that wrap AI capabilities such as prompt orchestration, model calls, and response normalization. I integrate OpenAI, Hugging Face, or LangChain-style pipelines in a way that keeps prompts versioned and reusable instead of scattered across code. Strong typing, validation, and error handling ensure AI outputs remain safe and deterministic at the API layer. I write unit and integration tests that run cleanly under Bun and enforce coverage targets through CI. The result is a fast, maintainable API foundation where AI features are first-class, documented, and easy to evolve. Thanks, Hercules

@divumanocha

Hello, I came across your project and found it truly interesting. With over eight years of hands-on experience in this field, I have successfully delivered high-quality solutions to clients worldwide. My dedication to excellence is reflected in the 180+ positive reviews from satisfied clients. I’d love to bring this expertise to your project and ensure outstanding results. However, I do have a few important points I’d like to clarify to align perfectly with your vision. Let’s connect via chat, where I can also share relevant examples of my past work. I'm looking forward to hearing back from you! Best Regards, Divu.

@JijoThomas2020

Hello, I have hands-on experience building production APIs in NodeJS and integrating AI toolchains like OpenAI and Hugging Face directly into backend logic. I’m comfortable working with Bun and can design scalable endpoints with clear tests, documentation, and CI coverage. I’m available to overlap during California hours for stand-ups and quick iterations to ensure smooth collaboration and rapid progress. Please contact me so that we can discuss the details further. Thanks, Jijo

@djsmoothy

Hi there. I can help you design and build this API-first product in NodeJS running on Bun, with AI capabilities baked into the core from day one. I’ve built production APIs with modern runtimes, clean endpoint design, and tight AI integrations where reliability and test coverage really matter. I’m comfortable overlapping with PST hours for stand-ups, reviews, and fast iteration, and I keep PRs small, well-documented, and easy to review. Looking forward to your reply, Tayo

@corpmember29

I HAVE DELIVERED BUN-POWERED NODEJS APIS WITH BUILT-IN AI — LET’S BUILD YOUR FAST, SCALABLE, FUTURE-PROOF BACKEND FROM DAY ONE. Hello, I can architect and implement your API-only product using NodeJS on the Bun runtime, fully optimized for speed, concurrency, and modern developer workflows. I’ve shipped production services that embed OpenAI/Hugging Face/LangChain directly into the API layer, so integrating custom AI logic from the start will be a clean, predictable process. Core Features I Will Deliver • Scalable REST or GraphQL endpoints built for Bun • AI workflows integrated directly into handlers—model calls, prompt templates, vector ops, fine-tuning pipelines • Conventional commits, small PRs, clean documentation, and fast collaboration during California daylight hours • Automated test suite (unit + integration), strong typing, lint-clean code, and CI-ready structure User Roles Covered • Developers: clear routing, typed responses, reproducible local env setup • Product/QA: stable endpoints with documented AI behavior and testable outputs • Future contributors: well-structured codebase, docs, and examples to onboard quickly You will receive complete source code, full installation notes, and 2 years of free ongoing support post-launch. If this aligns with your vision, I’m ready to begin anytime.

@royalwebraisers

Dear Hiring Manager, I have hands-on experience building production-grade, API-first platforms in NodeJS, and I’m comfortable running services on Bun, including handling its runtime differences and tooling. Integrating AI workflows directly into core business logic is an area I actively work in, and I value fast, collaborative iteration with clear engineering standards. I will share my portfolio and relevant API examples in my first Freelancer Chat message. Implementation Approach: • Design scalable REST APIs on Bun with clean layering and reproducible local setup • Embed AI toolchains (OpenAI, Hugging Face, LangChain) using modular prompt and service abstractions • Implement CI-ready unit and integration tests targeting ≥80% coverage • Maintain lint-clean code with small, reviewable PRs and conventional commits Queries: • Do you have an initial preference between REST and GraphQL, or should this be decided during design? • Will AI usage require fine-tuning workflows in v1 or inference-only initially? • What CI environment is currently planned for the project? I can reliably overlap during PST/PDT hours and start immediately. I will waiting for your response. Kindest regards,

@devitmd98

Hello, I can build your API-first product on Bun with a clean, scalable architecture and AI toolchains embedded from day one, working in tight iteration loops with at least 4 hours overlap during California daytime for stand-ups/reviews and rapid PR cycles. I’ll design the REST layer (or propose GraphQL only if it truly reduces round-trips and schema complexity for your use-cases), implement reliable AI-backed endpoints with prompt/versioning + safe retries/timeouts + observability, and deliver a repo that’s easy for future engineers to extend with strong docs, conventional commits, small reviewable PRs, and CI that enforces linting plus ≥80% automated coverage. Tech stack: Bun + TypeScript, Hono/Fastify-style HTTP framework compatible with Bun, Zod for request/response validation, OpenAPI/Swagger docs, OpenAI SDK + optional LangChain (or lightweight internal prompt/router layer), Hugging Face inference where needed, Redis (rate limiting/caching), PostgreSQL (Prisma/Drizzle), background jobs/queues (BullMQ or a Bun-friendly alternative), testing with Vitest + Supertest-style integration tests, ESLint/Prettier, GitHub Actions CI, Docker for reproducible local setup, and Sentry/OpenTelemetry for tracing. I look forward to the opportunity to contribute to your goals and to building a long-term, successful collaboration. Best regards