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Full-Stack Developer - AI EdTech Platform (Ongoing Retainer) We need an experienced developer for ongoing maintenance and feature development of an AI-powered legal training platform with avatar interactions, LLM-powered assessments, multi-tenant architecture, and gamification. Tech Stack Frontend: JavaScript SPA, TailwindCSS Backend: Node.js, Express, PostgreSQL Infrastructure: AWS (containers, serverless, Terraform), Docker, GitHub Actions Integrations: LLM APIs, video SDKs, payment processing, SSO/SAML What You'll Do Monitor production, respond to incidents, debug issues Build new features (assessments, analytics, integrations) Maintain infrastructure (Terraform, AWS, CI/CD) Security updates, database migrations, performance optimization Required Experience (5+ years) Node.js, Express, PostgreSQL AWS (containers, serverless, S3, monitoring) Terraform, Docker, CI/CD pipelines Modern JavaScript, REST/WebSocket APIs Debugging distributed systems Bonus: LLM integrations, multi-tenant SaaS, WebRTC, mobile frameworks, payment gateways Details Availability: Critical issues within 1 working day (UK business hours preferred) Process: Screening - Paid test - interview - trial period To Apply Include: Tech stack experience with examples AWS architecture you've maintained Production systems (scale/uptime) Availability & rate Portfolio/GitHub & references
Project ID: 40653476
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342 freelancers are bidding on average £24 GBP/hour for this job

With over a decade of experience in full-stack architecture and high-scale systems, I understand the critical need for ongoing maintenance and feature development for your AI EdTech platform. As an experienced developer in scaling systems for over 1 million users and high-security FinTech, I am well-equipped to handle the complexities of your project involving avatar interactions, LLM-powered assessments, and multi-tenant architecture. For strategic insight, ensuring scalability and security in your platform is key. Leveraging my past success in building and scaling Telegram Mini Apps for over 1 million users, I can provide valuable expertise in maintaining and optimizing your infrastructure for high performance. I invite you to reach out to discuss how I can contribute to the success of your EdTech platform. Let's connect to explore how my skills and experience align with your project goals and requirements.
£28.80 GBP in 15 days
8.2
8.2

Hello, I'm Elias, a Miami-based senior software engineer with 20 years of experience in full-stack development. I specialize in scalable, secure applications and have a strong background in AI and EdTech platforms. I understand your main goal is to maintain and enhance your AI-driven EdTech platform for better performance and user experience. I've worked on similar projects focusing on secure architecture, responsive UI, and maintainability. For your project, I would approach it in these phases: 1) Understand the current system and identify maintenance needs. 2) Gather user feedback to assess the user experience. 3) Implement core feature enhancements and ensure integrations. 4) Conduct thorough testing for reliability. 5) Provide ongoing support and monitor performance. Could you please clarify the following questions to help me better understand the project? 1) What specific areas of the platform need immediate attention? 2) Are there any integrations or third-party services you plan to add? 3) How do you currently manage user roles and permissions? I've built similar systems before, though most were under NDA, so I can't share them publicly. However, I’d be happy to discuss the architecture and features. Additionally, I can provide a future-proof design that accommodates growth and new features.
£50 GBP in 30 days
8.1
8.1

✅ Strong experience with Node.js, PostgreSQL, AWS & AI Integrations Hi, I went through your job post and this looks like a strong fit for my experience. I have worked on AI-powered platforms and SaaS products involving Node.js, REST APIs, PostgreSQL, LLM integrations, real-time systems, payments, and cloud infrastructure. I’m comfortable working with your stack: JavaScript, Node.js/Express, PostgreSQL, Docker, AWS, CI/CD and GitHub Actions. I can handle ongoing production monitoring, debugging, feature development, database migrations, performance optimization and security updates. I also have experience integrating AI/LLM systems, AI agents and conversational AI, which would be useful for your assessments and avatar-based training platform. I’m comfortable working within an ongoing retainer and can prioritize production issues during UK business hours. I’d be happy to discuss your current architecture, production setup, availability expectations and trial process. Thanks! Purnima
£27 GBP in 40 days
8.0
8.0

With over 5 years of Node.js and AWS expertise, including maintaining complex architectures and CI/CD pipelines, I'm well-equipped for ongoing maintenance and feature development of your AI EdTech platform. Could you share more about the specific LLM APIs the platform integrates with? Regards, Yogesh Kumar
£19 GBP in 30 days
7.8
7.8

Hello, Backend Development, Node.js, Express, PostgreSQL, AWS architecture maintenance, Terraform, Docker, CI/CD Hello! I'm Yasir, a seasoned developer with a wealth of experience in all aspects of backend development and systems maintenance. I have a keen eye for detail and a knack for automating monotonous tasks that can improve efficiency on your platform. I've spent over 5+ years honing my skills in Node.js, Express and PostgreSQL. And you bet AWS is right at the core of what I do. I’ve architectured projects from the ground up while ensuring they’re scalable and remain highly-available even during peak times. My implementation strength doesn't stop there. Over the years, I've excelled in handling critical production issues within tight deadlines. I believe that quality code is essential to any successful development project. Hence, I write clean, maintainable code that prioritizes long term stability and easy debugging. Being used to working across different time zones, I can respond swiftly to critical incidents within a short lead time and ensure that your system is up and running swiftly with minimal downtime. My availability plus rate questions are answered by my portfolio; where you can find some diverse examples of successfully planned and implemented projects just like yours. Consider me as your developer for both immediate fixes to long term growth. Thanks!
£22 GBP in 15 days
7.9
7.9

Dear , 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, Amazon Web Services, Node.js, Express JS, PostgreSQL, Docker, Full Stack Development, Frontend Development, Terraform 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.
£25 GBP in 5 days
8.2
8.2

Hi, this is a strong match for my background. I’ve worked on ongoing product maintenance and feature delivery across Node.js, PostgreSQL, AWS, Docker, CI/CD, and API-heavy systems, including debugging live production issues and improving stability/performance. Your mix of incident response, infra upkeep, and new feature work is exactly the kind of long-term engagement I’m comfortable with. I can work within UK business hours for critical items and would be happy to discuss the paid test and workflow here on the platform.
£20 GBP in 40 days
7.4
7.4

For this ongoing AI legal-training platform, I can handle both production ownership and feature delivery across the JavaScript SPA, Node.js/Express services, PostgreSQL, and AWS infrastructure. I have 10+ years of full-stack experience and 249+ completed projects, including LLM-powered assessment workflows, multi-tenant SaaS, real-time APIs, payment integrations, SSO, and analytics. My AWS experience includes maintaining Dockerized ECS/Fargate services, Lambda-based workflows, S3 assets, RDS PostgreSQL, CloudWatch monitoring, IAM, networking, and Terraform-managed environments. I use GitHub Actions for tested deployments, controlled migrations, rollback paths, and security updates. For your platform, I would first review production health, logs, deployment history, tenant isolation, database performance, and incident procedures, then establish a prioritized maintenance and feature backlog. I can extend assessments and avatar/video flows through REST/WebSocket APIs while keeping LLM calls observable, rate-limited, and safe for tenant data. I can support critical issues within one working day during UK business hours and work comfortably with your screening, paid test, interview, and trial process. My Freelancer profile contains relevant portfolio work; references can also be provided through the platform. Muhammad Saad
£26 GBP in 40 days
7.4
7.4

Your requirement is clearly focused on more than backend coding. You need a senior engineer who can handle Python/PHP, PostgreSQL, APIs and system design, while also communicating confidently with UK engineering teams during technical interviews and client discussions. We can provide a senior backend profile with international client-facing experience and the ability to discuss architecture, production decisions and technical challenges in detail. The engineer would participate directly in the interview process and represent their own experience. We also understand that your opportunities span gambling, banking and insurance, so the right profile needs to be comfortable working in these environments. Could you confirm whether Python or PHP is the priority for the current opportunity, and whether this is a full-time staff augmentation engagement? Once I have that, I can share the most relevant engineer's profile, experience and availability.
£60 GBP in 40 days
8.1
8.1

Hello, Here are the answers to your questions: Tech Stack & AI: 9+ years Node.js, Express, PostgreSQL, REST/WebSockets. Integrated LLM assessment pipelines and real-time video SDK flows. AWS & DevOps: Terraform, Docker, ECS Fargate, Lambda, and GitHub Actions CI/CD with automated rollbacks. Scale & Uptime: Maintained platforms with 100k+ MAU at 99.95% uptime using CloudWatch (MTTR under 30 mins). Availability & Rate: Mon–Fri, 9:30 AM–7:00 PM IST / 4:00 AM–1:30 PM UK time, 40 hrs/wk. Rate: £18/hr. Portfolio/GitHub & references: Please review my Freelancer profile for my portfolio and previous work. I can step in and keep your AI legal training platform reliable while delivering new features cleanly. I’m also comfortable with the paid test and trial period. Best, Niral
£18 GBP in 40 days
7.1
7.1

Hi! Maintaining multi-tenant AI EdTech platforms with avatar interactions and LLM assessment pipelines often leads to production latency spikes and tenant data leaks when WebSocket connections, streaming token buffers, and PostgreSQL connection pools are unoptimized. Without strict multi-tenant schema isolation, automated Terraform IaC drift management, and containerized auto-scaling under AWS ECS/EKS, background AI evaluation jobs degrade interactive avatar responsiveness. I have 6+ years maintaining production Node.js/Express, PostgreSQL, and AWS systems. I manage containerized ECS/Fargate clusters provisioned via Terraform, CI/CD GitHub Actions pipelines, multi-tenant row-level security (RLS) in PostgreSQL, and real-time streaming LLM/WebRTC avatar integrations. I am available during UK business hours with sub-24h SLA for critical incidents at £25/hr. Let’s connect for the screening and paid technical test to review your platform architecture today.
£20 GBP in 30 days
6.5
6.5

Hello!, This is James from Hollywood... I read your EdTech Platform Maintenance and Development post carefully, and it’s clear you need someone who can keep the platform stable while improving it in a scalable way. I’m a senior Full-Stack & AI Engineer with 15 years of experience across Node.js, Express, PostgreSQL, AWS, Docker, and Terraform, so this is right in my lane. For a project like this, I’d handle it in phases: 1. Review the current codebase, infrastructure, and pain points 2. Fix bugs, improve reliability, and tighten performance 3. Roll out new features in small, safe updates 4. Keep deployments clean with proper monitoring and version control I’ve built and maintained production systems for SaaS, AI tools, and data-heavy platforms, including: - an internal learning dashboard for a training company - a student progress tracking app for a tutoring platform - an AI workflow tool for an online education team - a subscription-based content portal with admin tooling Could you please clarify the following questions to help me better understand the project? 1. What are the top priorities right now: bugs, new features, performance, or infrastructure? 2. Is the platform already running on AWS with Docker and Terraform, or does any of that need setup/cleanup? 3. How are you managing ongoing development now, and do you want a retainer-style workflow? I’m careful with details, communicate clearly, and focus on building things that are stable long-term, not just quick
£35 GBP in 14 days
6.6
6.6

Hello, I read your requirements carefully and understand that you need an experienced Full-Stack Developer for ongoing maintenance and feature development of your AI-powered, multi-tenant EdTech platform. I have 10+ years of experience with Node.js, Express, PostgreSQL, modern JavaScript, AWS, Docker, Terraform, CI/CD, REST/WebSocket APIs, and third-party integrations. I can work directly with your existing production environment to handle incident response, debugging, feature development, database migrations, performance optimization, security updates, and infrastructure maintenance. I am also experienced with LLM integrations, SaaS architectures, payment systems, real-time communication, and API-driven applications, which aligns well with your platform's AI assessments and avatar-based learning features. I can follow your existing GitHub/AWS/Terraform workflows, provide regular updates, and maintain the codebase with production stability as a priority. I can also participate in the paid technical test and interview process. I will work with Agile methodology, provide 2 YEARS OF FREE ONGOING SUPPORT, complete SOURCE CODE, and assist from ZERO TO PRODUCTION. I eagerly await your positive response. Thanks.
£21 GBP in 40 days
6.8
6.8

Hello! As per your project post, you are looking for an experienced full stack developer to provide ongoing maintenance and feature development for an AI powered legal training platform with avatar interactions, LLM powered assessments, multi tenant architecture, and gamification. The goal is to keep the existing platform stable while continuously improving its learning experience and capabilities. My focus will be on understanding the current platform and taking ownership of ongoing development, maintenance, bug fixing, AI and LLM based assessment workflows, avatar interactions, tenant specific functionality, user progress, and gamification features. I will work within the existing architecture and ensure new functionality is introduced cleanly without disrupting current users or tenant environments. I specialize in full stack web development, AI integrations, LLM powered applications, SaaS platforms, multi tenant systems, educational platforms, APIs, and ongoing product development. I can work as an extension of your team, handling both planned feature development and ongoing technical improvements as the platform evolves. Let’s connect to review the current platform, development roadmap, and ongoing support expectations so we can establish a reliable development partnership. Best regards, Nikita Gupta
£18 GBP in 40 days
6.7
6.7

Full-Stack AI EdTech Platform I can support the ongoing development and maintenance of your AI-powered legal training platform, including production support, feature development, AWS infrastructure, and LLM integrations. Here's my approach: → Maintain Node.js, Express, PostgreSQL, and modern JavaScript applications → Handle AWS, Docker, Terraform, CI/CD, monitoring, and production issues → Develop assessments, analytics, APIs, integrations, and multi-tenant features → Integrate LLM APIs, payments, SSO/SAML, and real-time communication → Focus on security, performance, database migrations, and reliable releases Stack JavaScript → Node.js/Express → PostgreSQL → AWS → Docker/Terraform → GitHub Actions → LLM APIs Flow Audit → Production Support → Feature Development → Testing → Deployment → Ongoing Maintenance Question Could you share the current production architecture and the main features or issues you want prioritized during the initial trial period? Let's connect... Thanks
£18 GBP in 40 days
6.8
6.8

Hi there, I'm excited about the opportunity to enhance the AI-powered legal training platform you've described. With my extensive experience in Node.js, Express, and PostgreSQL, I can ensure seamless maintenance and feature development. My work with AWS and Docker aligns perfectly with your infrastructure needs, and I'm well-versed in debugging distributed systems. I am available for critical issues within the required timeframe and can start immediately. Your satisfaction is my priority and I guarantee that I will deliver you a high-quality result. Regards, Ali
£18 GBP in 1 day
6.4
6.4

Hello, I can help with both the maintenance side and the ongoing feature work for your AI EdTech platform. I’m experienced with JavaScript applications, Node/Express backends, PostgreSQL, AWS environments, Dockerized deployments, and CI/CD pipelines, so I can contribute across production support, infrastructure, and development without much hand-holding. The LLM/API and multi-system integration side is also familiar territory. I’m available for a long-term arrangement and can align with your expected response window for urgent issues.
£18 GBP in 40 days
6.0
6.0

Hello, You're looking to maintain and evolve an AI-powered EdTech platform with avatar interactions, LLM assessments, and a multi-tenant setup. Keeping this running smoothly means handling everything from Terraform infrastructure to real-time debugging when the LLM-backed assessments glitch during avatar sessions. I've worked on similar systems with Node.js backends that needed to stay stable while processing large volumes of user activity, and I'm familiar with the stack here—PostgreSQL migrations, AWS container orchestration, and the usual distributed system headaches. The real challenge is usually balancing real-time performance with long-running LLM calls without blowing the budget on token costs. I'd approach this by keeping the core logic lean in Express, using Terraform for reproducible deployments, and setting up GitHub Actions pipelines that catch issues before they reach users. The multi-tenant side would need careful permission handling in PostgreSQL, especially when avatar sessions and payment processing interact. The biggest unknown is often the LLM integration—rate limits, hallucinations in assessments, or unexpected API changes can break things. I'd start by building lightweight monitoring around the LLM calls to catch drift early. I can start working right away. Let's connect and discuss the details. Thanks, Denis.
£18 GBP in 40 days
6.2
6.2

Hello, Do you have existing documentation for the current infrastructure? Are there any specific LLM APIs you're currently using? Exciting AI EdTech project! I’ll focus on enhancing your platform's scalability while ensuring seamless integration with avatar interactions. Aiming to tackle potential challenges in maintaining multi-tenant architecture, I’ll ensure robust system monitoring and quick incident responses. I will send examples of similar projects I've handled in chat. Let’s chat to fine-tune your requirements and move forward smoothly. Looking forward to your reply!
£25 GBP in 40 days
5.9
5.9

Hello! Based on your project description, you are looking for an experienced full stack developer to provide ongoing maintenance and feature development for an AI powered EdTech platform with avatar interactions, LLM assessments, multi tenant architecture, gamification, analytics, payments, and SSO. The role also requires dependable production support, infrastructure maintenance, security updates, database work, and performance optimisation. I will focus on maintaining and extending your Node.js, Express, PostgreSQL, JavaScript, and AWS environment while keeping production stability a priority. I can work with Docker, Terraform, GitHub Actions, REST and WebSocket APIs, serverless infrastructure, monitoring, database migrations, and third party AI integrations. I will also approach incidents methodically, improve reliability, and keep new feature development aligned with the existing architecture. I specialize in full stack development with 7+ years experience and I have done similar work in past please open the chat window so I can share with you. Thank you for considering my proposal. I look forward to hearing from you soon. Best regards, Nikita Gupta.
£18 GBP in 40 days
6.0
6.0

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