We have an existing Next.js SaaS application that has grown significantly over time. It works, but the frontend is becoming harder to change safely, and a couple of important user flows are slower than they should be. Before starting another round of feature development, we want an experienced React engineer to examine the codebase and help us understand what should be addressed first. We are not looking for a generic best-practices checklist or a recommendation to rewrite everything. This is a short, focused assignment covering one repository and up to two agreed user flows. We would like you to review the component structure, state and data flow, API usage, rendering behavior, bundle size, network activity, loading strategy, and relevant test coverage. At the end of the audit, we expect: - A concise report referencing specific parts of the code - Baseline performance measurements where possible - Problems ranked by impact and estimated effort - Five practical improvements we can address first - A sensible plan for the larger architectural or performance work - A 30-minute call to discuss your findings We can provide repository access, setup instructions, a staging environment, and test credentials. You should have substantial experience with React, Next.js, and TypeScript and be comfortable investigating production frontend performance and maintainability problems. Budget: $300 fixed price Expected turnaround: Three calendar days after access is provided When applying, please share one relevant example and briefly explain what you would examine first.

We’re looking for an experienced Full-Stack Developer to build and refine a modern, responsive web application. You should be comfortable owning both the front end and back end, working independently, and turning clear requirements into a polished, reliable product. What You’ll Do Build and maintain the web application from front end to back end Create a clean, fast, mobile-responsive UI Develop backend functionality, APIs, and database integrations Implement user authentication and account functionality Integrate third-party APIs/services as needed Test, debug, and optimize performance Deploy and maintain the production application What We’re Looking For Strong full-stack web development experience Excellent JavaScript/TypeScript skills Experience with modern frameworks such as React/Next.js Strong backend and database experience Experience with APIs, authentication, cloud deployment, and Git Ability to write clean, scalable, well-documented code Strong communication and ability to work independently Important: We want a developer who can think through problems and recommend solutions—not someone who simply waits for step-by-step instructions. When applying, please send 2–3 examples of web apps you personally built, briefly explain your role in each, and include your availability and hourly rate.

Project: web platform bringing together people business and capital Engagement: can be hourly or fixed‑price for MVP build, via Upwork Location: DFW area of Texas, US. Scope of Work (initial/brief): design technical architecture for a web app (front‑end, back‑end, database, basic admin tools). Implement core MVP features: user registration/login, profile creation and editing, search/filter UI, connection requests etc. Set up hosting/deployment, security best practices, and a structure that can scale to more users and features over time. Periodically provide documentation and a maintainable codebase that supports future iterations. Tech Stack (flexible): Front‑end: React, Vue, or similar modern JS framework. Back‑end: Node.js, Python (Django/FastAPI), or similar. Database: PostgreSQL or other relational DB. Hosting: AWS, GCP, Azure, or comparable cloud provider. Compensation & Requirements: business plan, monetization strategy, and legal structure will be shared once we have mutual interest and an NDA in place. Equity and partnership terms will be discussed after NDA is signed and subject to a separate written agreement.

We want to add pages to our existing website and integrate Apple Pay or Stripe. Our designer is currently working on the layout and flow; we're looking to start front-end development in 2 weeks.

Description: I’ve built an MVP for a product builder—an app that lets users create websites, apps, and AI-powered products interactively. I used Lovable to generate the initial front end, which is about 30-40% complete. Now, I need a skilled developer to take the project further—expanding the back end, integrating interactivity, and making it more like Polsia in terms of task-driven creation. What I need: Integrate or build the back-end logic (potentially serverless or cloud functions). Enhance interactivity so users can create tasks and see the process, similar to Polsia. Ability to work with or refactor the code generated by Lovable.

We are seeking a Full-Stack Mobile App Developer to create a cross-platform mobile app (iOS & Android) that connects to our existing commercial real estate platform. The app should enhance user engagement and provide a seamless experience for property seekers. The ideal candidate will have experience in both front-end and back-end development, ensuring a smooth integration with our existing system.

Marketing Technologist (FinTech & Real Estate) (Not a fixed price opportunity, HOURLY with potential for a full-time position) We are a fast-paced group of companies seeking a tech-savvy Marketing Technologist to manage, and optimize our marketing and sales technology stack. In this role, your primary focus will be the architecture, setup, and maintenance of our marketing systems—specifically WordPress and our CRM ecosystem, with a heavy emphasis on HighLevel (aka GoHighLevel). This is a dynamic role where you will wear multiple hats to support our operations. You will handle everything from executing front-end WordPress design updates and launching high-converting email drip campaigns, to mapping custom data objects inside our CRM (such as linking specific real estate listings to prospective client profiles) to optimize our sales team's communication. While you don't need to be a software engineer, you must possess enough technical literacy to act as the bridge between our business goals and external developers for advanced integration projects. Primary Responsibilities: Systems Management & Optimization: Serve as the primary admin and architect of our marketing tools and CRM platforms (specifically HighLevel), ensuring clean data hygiene, webhook functionality, and optimized sales workflows. CRM Customization & Architecture: Build custom data objects, custom fields, and custom values to track real estate properties, listing matches, and pipeline stages, directly improving agent-to-client communication. Web & Design Updates: Own our WordPress website, handling routine landing page creation, form embeds, copy/design updates, and lead-capture optimization. Advanced Automation: Design, build, and deploy automated multi-channel drip campaigns (Email, SMS, ringless voicemail) for lead nurturing, client onboarding, and property alerts. Technical Liaison: Translate marketing and sales needs into technical requirements; collaborate with and oversee external developers on API connections, custom widgets, and frontend integration projects. Team Support: Act as the go-to problem solver for the sales team when tech issues arise, maintaining an agile, "wear-multiple-hats" attitude to keep operations running smoothly. Required Skills & Qualifications Technical Skills: Expert CRM Administration: Advanced experience configuring and managing HighLevel (GoHighLevel) is highly preferred. Deep familiarity with other robust CRM platforms such as HubSpot, Salesforce, Follow Up Boss, KvCore, or Intercom is also highly valued. You must know how to build custom objects, map complex workflows, and manage sub-accounts/pipelines. WordPress Proficiency: Strong experience managing WordPress websites, including page builders (Elementor, Divi, etc.), theme customization, form/plugin integrations, and tracking pixels. Marketing Automation: Proven track record of building automated nurturing sequences, trigger-based workflows, and database segmentation. Integration Literacy: A foundational understanding of how APIs, Zapier, webhooks, and frontend widgets connect. Ability to speak the language of developers (HTML/CSS/JS concepts) without necessarily writing heavy code yourself.

I need a full-service mobile app developer to build a hospitality loyalty app called JourneyOne that unifies multiple hotel loyalty programs into one platform. The app should let users manage rewards, discover hotels, book stays, and receive personalized travel offers. I’m looking for support with UI/UX design, iOS and Android app development, backend setup, payment integration, API connections with hotel systems, testing, and launch preparation. The ideal freelancer can handle both front-end and back-end work and help deliver a polished, user-friendly experience for travelers.

Need full stack developer capable of setting up a geospatial software. Software code is written primarily in React and Python. Some coding development will be needed. The ideal candidate will have experience with AWS services and be able to handle both front-end and back-end development tasks. Experience establishing CI/CD pipeline and using GitHub. Experience with Kubernetes cluster (AWS EKS) and Key Cloak identity server. All source code has been developed, need help deploying on new AWS instance. NDA is required. Seeking project completion in 30 days.

Full-stack developer (Node.js/TypeScript, React) with cloud/DevOps experience, and comfortable with PostgreSQL, S3-compatible storage, and Google Cloud service accounts. This is to support solid mobile app built for dual platforms, with a full ML comparison pipeline, and the supporting infrastructure. Initial Task will be an infrastructure migration (DevOps). Second task will be several front end and backend app updates.