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I’m kicking off a long-term product initiative and need a senior-level, US-based full-stack developer who is comfortable living deep in the backend and fluent in agentic coding approaches. The core of the work revolves around building and maintaining intelligent services—everything from orchestrating model calls to designing decision flows—so you should feel at home shaping complex back-end logic, hardening APIs, and keeping latency low. Here’s what the day-to-day will look like: • Architect and extend a robust backend that drives agentic behaviors, using clean, testable code. • Integrate and fine-tune AI pipelines (think Python, FastAPI, LangChain or similar) so agents plan, reason, and execute reliably. • Collaborate on the frontend only when integration points demand it; the bulk of your focus stays server-side. • Ship iteratively, writing unit tests and instrumentation that let us measure agent performance in production. • Work US hours for tight feedback loops and occasional whiteboard sessions. Success criteria • Clear, well-documented backend modules that expose agent capabilities through stable endpoints. • Demonstrable improvement in agent response quality and decision accuracy each sprint. • CI/CD pipeline passes with high test coverage and no critical vulnerabilities. • Code reviewed and merged without blocking other teams. If you thrive on turning AI research ideas into production-ready systems and appreciate straight-to-the-point collaboration, let’s talk.
Project ID: 40740356
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166 freelancers are bidding on average $171 USD for this job

Hello, I understand you are looking for a US-based senior AI full-stack developer to lead your long-term product initiative. I specialize in full-stack solutions with a strong focus on backend development and AI integration. With experience in building and maintaining intelligent services, I am well-equipped to architect robust backend systems, integrate AI pipelines, and optimize performance to keep latency low. My approach involves writing clean, testable code, collaborating on the frontend when necessary, and prioritizing iterative development with a strong emphasis on testing and instrumentation. I am committed to delivering clear, well-documented backend modules, improving agent response quality, and ensuring code quality through rigorous testing and code reviews. With a portfolio showcasing my expertise in backend development and AI integration, I am confident in my ability to meet your project requirements effectively. If you are seeking a dedicated professional who can seamlessly blend AI research with practical implementation, I am here to help. Let's discuss how we can collaborate to bring your vision to life. Sincerely, Rajesh
$140 USD in 10 days
8.6
8.6

⭐⭐⭐⭐⭐ Build Intelligent Backend Services as a Senior Full-Stack Developer ❇️ Hi My Friend, I hope you're doing well. I’ve looked over your project needs and see you are looking for a senior-level full-stack developer. You don’t need to search any further; Zohaib is here to assist you! My team has successfully completed over 50 similar projects for backend development. I will create and maintain intelligent services, ensuring your backend logic is robust and efficient. ➡️ Why Me? I can easily handle your backend development needs as I have 5 years of experience in full-stack development, focusing on backend architecture, API design, and AI pipeline integration. My skills include Python, FastAPI, and working with various databases. I also have a strong grip on CI/CD processes and unit testing, ensuring high-quality code delivery. ➡️ Let’s have a quick chat to discuss your project in detail and I can share samples of my previous work. I’m looking forward to our conversation! ➡️ Skills & Experience: ✅ Full-Stack Development ✅ Backend Architecture ✅ API Design ✅ Python Programming ✅ FastAPI ✅ AI Pipeline Integration ✅ Unit Testing ✅ CI/CD Processes ✅ Database Management ✅ Performance Optimization ✅ Documentation ✅ Agile Methodologies Waiting for your response! Best Regards, Zohaib
$150 USD in 2 days
8.0
8.0

Hi, I went through your project details and understand what you're looking to achieve. I'd be interested in working with you on this. Based on the requirements you've shared, I can handle the project from start to completion while keeping the work aligned with your expectations, timeline, and desired outcome. My approach is straightforward: first, I'll make sure the requirements and expected deliverables are clear. Then I'll complete the work in structured stages, share progress along the way, incorporate your feedback, and deliver the final work after everything has been reviewed. Before we begin, I have a couple of questions about your requirements that will help me understand the scope more accurately. Feel free to message me so we can discuss the details and determine the best way to move forward. Best regards, Anum
$250 USD in 1 day
6.8
6.8

Hello, With more than 15 years in the software development industry, I have more than proven my capability of handling long-term, complex projects like the one you have outlined. My proficiency with Python and AI Automation is highly relevant to this role as I have successfully built intelligent services for various types of businesses over the years. Moreover, my deep understanding of backend logic and API hardening will ensure a robust, scalable, and secure architecture for your project. I am adept at writing clean, testable code and believe in iterative shipping with high monitoring and quality checks. Drawing on my experience with large-scale projects, I am well-versed in working during US hours and upholding swift feedback loops. I value clear communication, client satisfaction, and delivering on time - qualities that would greatly benefit and enhance our collaboration. Let's work together to turn your AI research ideas into successful production-ready systems. Thanks!
$130 USD in 2 days
6.8
6.8

Hi, Most of my recent work sits exactly where you want a developer to live, server-side, orchestrating model calls and shaping decision flows. I built an internal AI business-development system that encodes domain knowledge into a query-and-decision pipeline over OpenAI and Claude, with queued jobs and Redis for latency. BD Automation: agentic BD workflows on Laravel and OpenAI/Claude One question on approach: do you want the agent planning loop deterministic with tool schemas, or free-form LangChain-style reasoning? That choice drives how we instrument and measure decision accuracy per sprint. I also built a Flask-based AI SaaS that analyzes Amazon reviews and generates listing content, so turning research ideas into production endpoints is familiar ground. I can start with one backend module behind stable endpoints and unit tests so you release only on merged, tested work. What repo or spec should I read first? Adil
$146.67 USD in 7 days
7.0
7.0

Hello, I'm Denis, a full-stack developer specializing in backend systems for AI workflows and agent orchestration. I understand you need someone comfortable designing decision flows and turning agentic concepts into reliable production systems. My approach starts with a thorough requirements and architecture review. I'd build the backend foundation using FastAPI, structure the agent orchestration layer for maintainability, and establish patterns for model integration. Once core systems are solid, I'd layer in comprehensive testing and monitoring for real-time agent performance visibility. The critical technical focus is agent reliability: consistent decision-making, robust error handling for model failures, and clear observability into agent reasoning. I'd implement explicit state management, smart retry logic, and logging that captures the full reasoning chain—not just inputs and outputs. A realistic consideration is scope creep around behavior tuning. I'd recommend shipping a working version first, measuring actual performance, then iterating based on real data rather than assumptions. I can start immediately. Let's discuss the details. Thanks, Denis.
$30 USD in 2 days
6.6
6.6

Hello sir, I’m Deepak from P4Logics, with 10+ years of experience in full-stack and AI development. I can build strong and fast backend systems for your AI product. I can develop smart AI services that plan, reason and work reliably. I also turn AI ideas into real, working products. I write clean, tested and secure code with stable APIs. I can also work with your team using agile methods and CI/CD for smooth delivery. Looking forward to work with you. Please ping me so that we can discuss more about the project. Thanks and Regards !!
$250 USD in 7 days
7.2
7.2

As an experienced full-stack developer, I bring a unique skill set ideally suited for your project. My proficiency in both backend and frontend development enables me to seamlessly integrate systems and create strategically streamlined solutions aligned with your core objectives. Backed by over 8 years of hands-on experience, I thrive on collaborating on challenging initiatives just like yours that involve complex backend logic and API hardening. I’m no stranger to AI development either; in fact, I have extensive expertise in working with Python, Node.js, and API Development which is pertinent to your project's needs. My deep understanding extends to implementing intelligent services that optimize performance, enhance decision-making capabilities, and drive critical improvements for secure endpoints – all in alignment with your 'Success Criteria'. Additionally, my experience in designing and maintaining CI/CD pipelines ensures high test coverage without compromising speed or quality.
$140 USD in 5 days
6.6
6.6

Hi there, Building and scaling reliable agentic AI pipelines often suffers from unpredictable model latency and brittle decision loops, but I architect robust Python and FastAPI backends that keep agent reasoning fast, structured, and production-ready. Here are my questions about your stack and workflows: 1. Which LLMs and orchestration frameworks are you currently standardizing on for the core agent loops? 2. Are you leveraging a specific vector database or caching layer for low-latency retrieval in production? Drop me a message so we can get started right away.
$250 USD in 5 days
6.3
6.3

Hello there , Good morning! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in Full Stack Development, Microservices, API Development, Backend Development, Database Development, C# Programming, Node.js, Agentic AI, Web Development and Python. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Best Regards
$155 USD in 4 days
5.9
5.9

With a decade of full-stack development experience, specializing in backend architecture and API optimization, I understand the critical need for a US-based senior dev in your intelligent services project. My recent project involved similar backend logic optimization using Python and FastAPI. Could you share more about the specific AI models you plan to integrate for this initiative? Regards, Yogesh Kumar
$40 USD in 7 days
5.9
5.9

With a decade of experience leading an AI and automation firm, I have refined my C#, database development, and Python skills to anticipate and address your project’s unique challenges. Building robust backend systems that facilitate fluent agent behavior is truly my forte. What sets me (and my team!) apart is our proven ability to move quickly from research-led ideas to production-ready, well-documented modules - precisely what you require. My multidisciplinary background aligns with various success factors you’ve outlined. As an ethical hacker and cybersecurity expert, I’ve mastered the art of sandboxing systems, ensuring CI/CD pipelines are impregnable while always keeping latency low. My work has won accolades for its high test coverage and absence of critical vulnerabilities, checks your project’s code must pass. Additionally, I understand the importance of unhindered collaboration amidst remote teams; throughout our journey together, my team will ensure code reviews merge smoothly without obstructing other operations. Finally, it's worth noting that as CEO of NOVA Technologies, what gets me out of bed every day isn't just being on the frontline building top-tier software (though that is rewarding). Every morning, I'm excited about transforming businesses through technology - that's the impact I want to make here.
$140 USD in 2 days
5.9
5.9

Perfect Match "PRODUCTION-READY AI WEB ENGINEERING" — you need scalable frontend, backend, AI integrations, and automated QA that can support several products without slowing future releases. I’d keep the existing stack where it makes sense and introduce clear API boundaries between UI, business logic, and AI services. Each AI feature would have measurable usage and quality signals, with caching and fallback handling where model or third-party API failures could affect the user experience. For QA, I’d combine unit and API tests with critical end-to-end flows in CI, making deployment depend on defined checks rather than manual confidence alone. Which project should the first engineer join, and what is the current frontend/backend stack we need to extend? Looking forward to work with you.
$140 USD in 7 days
5.8
5.8

Hi, Building intelligent services for a long term product initiative means starting with clean code for backend logic, stable API endpoints, and low latency for every model call. I will set up your agentic coding workflows using Python, FastAPI, and LangChain so your agents can plan, reason, and execute with high reliability in production. To keep the system fast and testable, I will build automated unit tests and logging instrumentation to track agent performance, decision accuracy, and response quality across every sprint. I will also structure your CI/CD pipelines so every build passes with high test coverage and clean code reviews before merging. One thing that helps with agentic behavior is adding a caching layer for frequent model prompt responses, which cuts down on wait times and API costs before the agents even run their main decision loops. How are you currently handling state management between the separate reasoning steps in your agent workflows? Best, Salma Noreen
$1,897 USD in 18 days
6.0
6.0

Hi, I am a full stack AI developer with 8 years of rich experience in software development, with a background in intelligent backend services, scalable APIs, AI integrations, and production ready systems. I am familiar with Python, FastAPI, LangChain, Node.js, C#, database development, backend development, API development, microservices, and agentic AI. For this project, I can build and extend backend services for agentic workflows, including model orchestration, decision flows, tool execution, and reliable API endpoints. I can structure the AI pipelines with clear modules, instrumentation, unit tests, and CI/CD checks to monitor agent performance, improve response quality, and keep latency and reliability under control. I'm an individual freelancer and can work on any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.
$250 USD in 7 days
5.6
5.6

Hello, I can build a scalable backend for your agentic AI system using FastAPI and LangChain, ensuring low-latency model calls and clean decision flows. I’ve optimized a similar backend for a client, reducing API response time from 3.5s to 800ms by batching model requests and caching frequent queries. I’d approach this by structuring the backend as modular services—one for planning, one for execution—so updates to reasoning logic don’t break the UI. The biggest gains will come from instrumenting each agent step with logging and metrics. Better agent performance will directly translate to fewer failed user interactions and faster iteration cycles. I’ll include health checks and rollback procedures in the deployment, so you can push updates without downtime. If this aligns with your needs, I’d be happy to discuss the architecture in more detail. Thanks, Lazar.
$30 USD in 1 day
5.4
5.4

Hi, I understand you're embarking on a long-term product initiative and require a senior-level, US-based full-stack developer proficient in backend development and agentic coding approaches. The project focuses on building and maintaining intelligent services, which involves orchestrating model calls and designing decision flows. A significant challenge in this project will be ensuring the robust integration of intelligent services with existing systems while maintaining high performance and scalability. My approach would be to first assess the current architecture to prioritize stability and identify potential bottlenecks in API hardening and decision flow design. I have extensive experience in Python and Node.js, particularly in developing scalable backend solutions and API development for intelligent systems. My past projects involved designing complex decision-making algorithms and integrating machine learning models into production environments. Q1 – Could you specify the types of intelligent services or models that will be integrated? Q2 – Are there existing systems or APIs that these services need to interact with? Q3 – What is the expected timeline for the initial phase of this initiative? Looking forward to hearing from you.
$30 USD in 7 days
5.6
5.6

Hello there , Good morning! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in Database Development, C# Programming, API Development, Web Development, Python, Node.js, Full Stack Development, Backend Development, Microservices and Agentic AI. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Please respond at your earliest convenience
$155 USD in 3 days
5.4
5.4

Hi, I can help build and maintain your backend-focused agentic AI platform with clean, scalable and well-tested architecture. I’m experienced with Python, FastAPI, AI/LLM integrations, API design, orchestration workflows, automated testing, and production monitoring. I can focus primarily on backend logic while supporting frontend integration when required, with an emphasis on latency, reliability, security, and measurable agent performance. I’m comfortable with iterative development, CI/CD, code reviews, and long-term collaboration.
$140 USD in 7 days
5.1
5.1

I’ve helped build intelligent backends that orchestrate AI workflows and handle complex decision-making logic, so I understand the importance of clean, testable code that keeps latency low. One recent project involved integrating multi-step agent pipelines with FastAPI and LangChain to improve response accuracy while maintaining stability under load. For your product, I’d focus first on creating backend modules with clear APIs that support dynamic agent behaviors. Do you already have preferred AI models or orchestration tools in place? That info will help me plan integration and testing strategies upfront. I’m also curious about your CI/CD setup—are you using automated testing frameworks tailored for agent logic, or should I help introduce them? I’m ready to jump in during US hours and run fast iterations with solid unit tests and monitoring so we can track agent performance improvements every sprint. Let’s get your AI agents running reliably in production without blocking other teams.
$30 USD in 7 days
5.4
5.4

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