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I’m searching for a part-time, US-based freelance Full Stack Software Engineer who can plug advanced AI capabilities—specifically OpenAI models—into our customer-facing products while modernising the underlying backend. The immediate roadmap centres on three priorities: • Bolting OpenAI endpoints into our existing feature set and exposing them through secure, well-documented APIs. • Refactoring our predominantly Python backend so it scales horizontally, runs leaner, and is easier to deploy. • Reviewing database design, API contracts, and server-side performance to eliminate bottlenecks and harden security. You’ll own technical decisions end-to-end, from shaping cloud architecture to writing production code. Expect plenty of autonomy, quick feedback loops, and direct access to the product team. What I’m looking for – Solid full-stack track record with an emphasis on Python (Node.js or similar experience is welcome). – Demonstrated success integrating AI APIs; hands-on familiarity with OpenAI is ideal, though Google Cloud AI or IBM Watson exposure is a bonus. – Strength in database management, API development, and server optimisation. – Clear communicator who can work solo yet collaborate asynchronously. – Must already be authorised to work in the United States. Engagement details This is a freelance, remote-first position for US residents only. Hours are flexible and project-based; we can scope milestones together and set a competitive rate that reflects your expertise. If shaping an AI-enabled, scalable backend sounds exciting, let’s talk about how you can start contributing this month.
Proje No: 40076085
58 teklifler
Uzaktan proje
Son aktiviteden bu yana geçen zaman 2 ay önce
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58 freelancer bu proje için ortalama $77 USD/ saat teklif veriyor

As a seasoned full-stack engineer with extensive experience in AI integration and backend modernization, I understand the importance of bolting OpenAI models into your customer-facing products while enhancing the scalability and efficiency of your backend infrastructure. In my previous projects, I have successfully integrated AI APIs and modernized backend systems, resulting in improved performance and security. My expertise in Python, along with a solid track record in database management, API development, and server optimization, positions me as a strong candidate to meet your requirements. Having worked on similar projects in fintech and healthcare domains, I am confident in my abilities to deliver results aligned with your goals. With a commitment to clear communication and collaboration, I am ready to take ownership of the technical decisions and drive the success of your project. If you are ready to elevate your customer-facing products with advanced AI capabilities and modernize your backend for scalability, I am eager to discuss how I can contribute to your project this month. Let's connect and explore how we can work together to achieve your objectives.
$72 USD 15 gün içinde
7,8
7,8

Hello, I’m Mirza Muhammad, a seasoned Full Stack Software engineer specializing in big data analysis, AI, and software development. I’ve had great success integrating AI APIs in the past so incorporating OpenAI models into your customer-facing products won't be an issue. Additionally, my proficiency in Python and Javascript - complemented by my database management, API development, and server optimization skills - will ensure a smooth and effective transition to a scalable backend system. At Live Experts®, we pride ourselves on our ability to communicate clearly and work autonomously yet collaboratively. This will be key to owning the project's technical decisions from end-to-end while maintaining a quick feedback loop with your team. Importantly, being already authorized to work in the United States means you won't have to worry about any legalities. I'm excited at the prospect of playing a significant role in enhancing your product offering and ensuring efficient deployment via the use of leaner codes. Let's discuss how my expertise can benefit your project while we outline milestones that suit- keeping your competitive rates in mind! Thanks!
$70 USD 762 gün içinde
7,3
7,3

Hi I am a US-based full stack engineer with strong experience integrating OpenAI models into production systems and modernizing Python backends for scale. A common technical risk in AI-enabled products is bolting LLM features onto legacy services without proper API boundaries, security controls, or performance isolation. I solve this by designing secure, well-versioned AI service layers that expose OpenAI capabilities through clean APIs while keeping core business logic deterministic. On the backend, I refactor Python services for horizontal scaling, efficient async execution, and clearer deployment workflows. I routinely review database schemas, query patterns, and API contracts to remove bottlenecks and reduce operational risk. My approach prioritizes observability, security hardening, and maintainable architecture over experimental shortcuts. The result is an AI-enabled backend that is scalable, auditable, and ready for customer-facing workloads. Thanks, Hercules
$90 USD 40 gün içinde
7,0
7,0

This aligns well with the kind of work I focus on: turning AI capabilities into reliable, production-grade features while strengthening the backend they depend on. I have a solid full-stack background with a strong emphasis on Python-based backends, API design, and database-driven systems. I’ve integrated AI APIs, including OpenAI models, into customer-facing products where security, cost control, and performance matter just as much as model output. My approach is to treat AI as part of the system architecture, not a bolt-on feature. On the backend side, I’m comfortable refactoring existing Python services to scale horizontally, reduce operational overhead, and improve deployment workflows. That includes reviewing database design, tightening API contracts, addressing performance bottlenecks, and hardening security around both traditional endpoints and AI-powered features. I’m used to owning technical decisions end to end, from cloud and service architecture through to production code, while collaborating asynchronously with product and engineering stakeholders. Clear communication and pragmatic trade-offs are important to me, especially when modernising an existing system. Best, Jenifer
$80 USD 40 gün içinde
7,8
7,8

Hi there, I’m excited about the opportunity to help integrate advanced AI capabilities into your customer-facing products. As a top California-based freelancer with a strong track record in full-stack development, I have successfully implemented OpenAI APIs in previous projects and am well-versed in refactoring Python backends to enhance scalability and performance. I understand your immediate roadmap and the importance of securely exposing OpenAI endpoints through well-documented APIs, while also focusing on optimizing database design and server-side efficiency. My approach involves thorough planning and collaboration with your product team to ensure seamless integration and quick feedback loops. I believe my skills in API development and server optimization align perfectly with your needs. I’m ready to dive into this project and start contributing immediately. Could you please share more about your existing infrastructure and any specific challenges you're currently facing? What existing backend architecture and technologies are you currently using that we should consider during the integration?
$70 USD 39 gün içinde
6,4
6,4

With your project focused on integrating advanced AI capabilities like OpenAI models into your customer-facing products and optimizing the backend, I am the seasoned full-stack developer you need. My extensive experience includes working with ASP.NET (Core/MVC/Web API), JavaScript (including Node.js and React.js), and mobile applications development with React Native, aligning perfectly with your tech stack requirements. I have a proven track record of executing complex projects similar to yours. From revamping predominantly Python backends to enhancing database design, API contracts, and server-side performance, I ensure that systems not only scale horizontally and run more efficiently, but also meet stringent security benchmarks. My experience integrating AI APIs will save us time and deliver seamless execution for optimal OpenAI endpoints. As a clear communicator who can work solo or in asynchronous collaboration, I can provide exactly the autonomy you mentioned looking for. My primary focus is on crafting clean architecture, maintainable code for performance and security. By leveraging my extensive knowledge in full-stack development and passion for futuristic tech like AI, I assure you of an AI-enabled, scalable backend that will elevate your product offerings – exactly what you need!
$80 USD 40 gün içinde
6,1
6,1

Hi there, I can jump in as a part-time full-stack engineer and integrate OpenAI features cleanly into your products while tightening up the Python backend for scale and reliability. I’ve worked end-to-end on API-driven systems where AI integrations, performance, and security all had to work together in production. I’m comfortable owning architecture decisions, refactoring backend services, and exposing well-documented, secure APIs to the frontend. You’ll get clear communication, production-ready code, and steady progress that fits a flexible, milestone-based setup. Looking forward to your reply, Tayo
$70 USD 40 gün içinde
6,5
6,5

Hello, I’m interested in the part-time, US-based freelance Full Stack Software Engineer role and would love to help you integrate OpenAI-powered capabilities while modernising your backend. I’ve built and scaled Python-first, customer-facing systems where OpenAI APIs were exposed through secure, production-grade endpoints used daily by real users. + How I Can Contribute: • Integrate OpenAI models into existing features and expose them via secure, well-documented APIs • Refactor a Python backend for horizontal scalability, cleaner deployments, and improved runtime performance • Review database schemas, API contracts, and server architecture to remove bottlenecks and harden security • Own cloud and backend decisions end-to-end while working closely with product + Why I’m a Strong Fit: • Proven full-stack background with deep Python experience (Node.js familiarity included) • Hands-on experience shipping OpenAI-powered features to production • Strong database, API design, and backend optimisation skills • Comfortable working autonomously with async collaboration I enjoy high-ownership roles and fast feedback loops. I’d be happy to start with a small milestone or pilot integration so you can quickly validate approach and impact. Best regards,
$80 USD 40 gün içinde
6,2
6,2

Hello, I have carefully reviewed your requirements for a US-based Full Stack Engineer with AI integration expertise and fully understand the need to modernize a Python backend while securely embedding OpenAI-powered features into customer-facing products. I bring 10+ years of full-stack experience with a strong focus on Python backends, scalable cloud architectures, API-first design, database optimization, and production-grade AI integrations using OpenAI and comparable platforms. I am comfortable owning technical decisions end-to-end, refactoring for horizontal scalability, improving deployment pipelines, and eliminating performance and security bottlenecks while collaborating asynchronously with product teams. I WILL PROVIDE 2 YEAR FREE ONGING SUPPORT AND COMPLETE SOURC CODE, WE WILL WORK WITH AGILE METHODOLOGY AND WILL GIVE YOU ASSISTANCE FROM ZERO TO PUBLISHING ON STOIRES. I am authorized to work in the United States and confident I can start contributing immediately. I eagerly await your positive response. Thanks. Julian
$80 USD 40 gün içinde
6,5
6,5

Hi there, I am a full-stack developer with strong experience in Python and Node.js, and I have hands-on experience integrating OpenAI APIs into production applications. I understand that you want to add AI capabilities to your products, refactor your backend for better scalability, and optimize your database and APIs for performance and security. I would start by reviewing your existing backend, improving its structure for scalability, integrating AI endpoints securely, and optimizing database and API performance. I can use Python, Node.js, PostgreSQL/MySQL, Docker, and AWS/GCP, depending on your current setup. ✅ Please review our portfolio: https://www.freelancer.com/u/sagarjain4010 (323 completed job with 100% client satisfaction) Before starting the work, I would like to clarify a few details -which OpenAI models should we focus on first? -Do you have a preferred cloud setup or deployment process? -How large is the current backend, and are there specific bottlenecks you want addressed? Happy to discuss in details in private chat . Regards, Sagar
$70 USD 40 gün içinde
5,9
5,9

With an extensive background in Electrical Engineering and specialization in AI and Embedded Systems, I possess a unique blend of skills that make me the ideal candidate for this AI-focused full-stack engineering role. My experience with firmware development, PCB design, and complete IoT product engineering aligns well with your intention to modernize the backend and integrate AI models. I'm fluent in popular programming languages like Python and Node.js, enabling me to provide improvements that scale horizontally, run leaner, and are easier to deploy. One of the significant strengths I bring is my deep understanding of OpenAI, which is instrumental for this role. Although having hands-on familiarity with OpenAI is ideal, my demonstrated success in integrating AI APIs, including those from Google Cloud AI and IBM Watson can prove highly valuable. Additionally, as a strong communicator who enjoys working autonomously but can also adapt to asynchronous collaboration, I can ensure smooth interactions within your team. Lastly, being an authorized US resident enables me to align perfectly with your requirement for a US-based freelancer. I'm excited by the opportunity to shape an AI-enabled backend that's both scalable and secure. Let's discuss how we can chart a path towards robust integration of advanced AI capabilities into your customer-facing products while modernizing the underlying backend efficiently and effectively.
$75 USD 40 gün içinde
5,9
5,9

As a tenured full-stack developer with over a decade of experience, I'm all about building and scaling technology products to their maximum potential. Through my various engagements, I've proven my competence in integrating AI APIs efficiently. Though I haven't directly worked with OpenAI, I am more than willing to get up to speed with it. Notably, my familiarity with platforms like Google Cloud AI suggests an ease in adapting to other AI platforms as well. Furthermore, I certainly possess the necessary skills for this role - remove the s for database management, API development and server optimization. My expertise is coupled with clear communication, which ensures seamless collaboration even in remote work settings. With me handling your project, you won’t only be getting a technically skilled engineer but a strategic problem solver that can independently own all aspects of your project and provide quick insights for effective decision-making. Finally, being based in the US gives us the added advantage of time zone synchrony. This means faster response time and quicker feedback loops to ensure a steady progress in your project. Let's discuss how we can set competitive rates together that uphold not just the value I bring to the table but also acknowledges your budgets and can build you an AI-enabled backend that will scale seamlessly while modernizing your customer-facing products all per your roadmap plan.
$80 USD 40 gün içinde
5,7
5,7

Hello, I am excited about the opportunity to contribute as a Full-Stack Software Engineer for your project, integrating OpenAI models and modernizing your backend systems. Experience and Skills: Backend Development: I have a strong background in Python and Node.js, with proven success in building scalable, secure APIs and refactoring codebases for performance. AI Integration: I’ve worked extensively with OpenAI's API, integrating its capabilities into various applications, and have experience using Google Cloud AI and IBM Watson. Database and Performance Optimization: I’ve reviewed and optimized database designs, implemented API contracts, and eliminated bottlenecks for faster, more secure server-side performance. Collaboration: I'm comfortable working autonomously but am also experienced in collaborating asynchronously to ensure smooth communication and progress. I’m confident I can help modernize your backend, integrate AI capabilities, and enhance performance. Let’s discuss how we can achieve your goals. Best regards, Waqas Ahmed
$80 USD 40 gün içinde
5,1
5,1

Hello Steven, I am Vishal Maharaj, a seasoned professional with 20 years of experience in JavaScript, Python, React.js, Full Stack Development, API Integration, OpenAI, and Node.js. I have carefully reviewed your project requirements for integrating advanced AI capabilities, specifically OpenAI models, into your customer-facing products while modernizing the backend. To achieve this, I propose bolting OpenAI endpoints into the existing feature set, refactoring the Python backend for scalability and efficiency, and optimizing database design, API contracts, and server-side performance. I will take ownership of technical decisions, ensuring secure and well-documented APIs, streamlined backend operations, and enhanced server performance. I would appreciate the opportunity to discuss this project further and explore how I can contribute to its success. Cheers, Vishal Maharaj
$90 USD 40 gün içinde
5,2
5,2

Hi! My name is Marjan and I'm here to offer you my services as a skilled applicant with over a decade of experience working on Freelancer.com. l believe I am the best fit candidate for this project due to my extensive experience; I would like to have a discussion to get to know that we both are on the same page. Once the scope will be locked, I will start working on it right away.
$70 USD 40 gün içinde
4,2
4,2

Hi there! Integrating AI into customer-facing products while keeping the backend scalable can be tricky. Inefficient setup or poorly designed APIs can slow performance and user experience. I can integrate OpenAI models, refactor your Python backend for horizontal scaling, and optimise databases and APIs to remove bottlenecks. My approach ensures secure, efficient, and future-ready systems that run smoothly under load. Do you want me to start with AI integration or backend optimisation first? Open chat now so we can make your platform AI-ready and fully optimised.
$80 USD 40 gün içinde
3,4
3,4

Hi, I have carefully read your project description and appreciate the clear focus on integrating advanced AI capabilities while strengthening and modernising an existing backend. The balance between hands on engineering, architectural decision making, and close collaboration with the product team genuinely interests me, and I would like to understand more about how you envision these AI driven features supporting your users. Your priorities around integrating OpenAI endpoints, refactoring a Python based backend for scalability, and improving database and API performance are well aligned with the type of work I regularly handle. I am comfortable owning features end to end, making pragmatic architecture choices, and delivering secure and maintainable solutions that scale with growth. Core goals include AI powered features, scalable backend architecture, secure APIs, database optimisation, performance improvements. I bring 7+ years of experience across full stack development, Python based systems, API design, cloud ready architectures, and AI driven integrations. I focus on clean code, thoughtful system design, and clear asynchronous communication. Let us schedule a quick chat to align your vision and next steps. Best Regards, Prasham Jain
$70 USD 40 gün içinde
3,6
3,6

Hello, We would like to assist you in integrating advanced AI capabilities, specifically OpenAI models, into your customer-facing products while modernizing the backend infrastructure. Our team at DexWolf Technologies has extensive experience in Full Stack Development and API Integration, making us well-equipped to handle the technical requirements of this project. Questions: 1. Are there any specific AI endpoints from OpenAI that you want to prioritize for integration? 2. Could you provide more details on the current database design and any specific performance issues you are facing? DexWolf Technologies has a proven track record in Full Stack Development, including expertise in Python and API integration. We have successfully integrated AI APIs in previous projects and are familiar with optimizing server-side performance for scalability and security. We would be happy to share relevant project samples during our discussion. Please feel free to connect with us via chat or call to further explore how we can contribute to your project. Thanks..!!
$80 USD 40 gün içinde
2,5
2,5

Hello. I am a full-stack software engineer with a strong Python backend focus and hands-on experience integrating OpenAI models into production, customer-facing systems via secure, well-documented APIs. I can design and expose AI-powered endpoints with proper authentication, rate limiting, observability, and cost controls while ensuring model usage aligns with product and compliance requirements. On the backend side, I will refactor your existing Python services toward a horizontally scalable architecture using stateless services, async processing where appropriate, and clean deployment pipelines. I routinely review and optimize database schemas, API contracts, and query patterns to eliminate performance bottlenecks and reduce operational overhead. My approach emphasizes secure-by-design systems, including secrets management, input validation, and defense against common API and prompt-injection risks. I am comfortable owning technical decisions end-to-end, from cloud architecture and infrastructure design to production code and documentation. I work asynchronously with clear communication, regular progress checkpoints, and measurable milestones. I am authorized to work in the United States and can begin contributing immediately on a part-time, milestone-based engagement. Regards, Tyler.
$80 USD 40 gün içinde
2,6
2,6

Hi Mate Steven R., Good afternoon! 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 Git, JavaScript, OpenAI, React.js, Node.js, Python, API Integration, Full Stack Development and AI Development. 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.. A fast response is appreciated
$70 USD 16 gün içinde
1,9
1,9

United States
Ara 17, 2025 tarihinden bu yana üye
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$1500-3000 USD
$10-30 USD
₹12500-37500 INR
₹12500-37500 INR
$15-25 USD / saat
$250-750 AUD
$30-250 USD
₹100-400 INR / saat
₹12500-37500 INR
$250-750 USD