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India
$100/hr
$0 earned
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Full-Stack Flutter & AI Mobile Engineer
I help founders, startups, and product teams build production-grade mobile applications and AI MVPs from scratch. Specializing in Flutter, real-time audio machine learning, and scalable cloud backends, I turn complex technical ideas into clean, fast, and user-friendly mobile products.
Recent Projects & What I Build:
AI Audio & Stem Separator (Demucs Engine): Full-stack mobile pipeline separating vocal and instrumental stems in real time using a GPU-accelerated FastAPI backend deployed on Google Cloud Platform.
Vāgdhenu (Sanskrit Audio & Pronunciation AI): Niche audio-to-text and pronunciation evaluation tool integrating Google AI Studio and specialized language models for Sanskrit mantra recitation and phonetic accuracy.
Singing-to-Notes / Sargam Transcriber: Real-time on-device audio processing tool that detects vocal pitch offline and converts singing directly into Western sheet notes and Indian Sargam notation.
Conversational Character Voice AI: Interactive voice companions featuring low-latency speech synthesis, conversational memory, and distinct personality prompting (Gemini/OpenAI + custom voice models).
Media & Automation Utilities: Native background processing, media extractors, audio converters, and permission-compliant Android/iOS workflows.
Core Technical Stack:
Mobile Frontend: Flutter, Dart, Android Studio, Native Permissions, Reactive State Management
Audio & Machine Learning: Demucs, Pitch Detection/DSP, Speech-to-Text (STT), Custom Text-to-Speech (TTS), Google AI Studio, Gemini API
Backend & Cloud: Python (FastAPI), Google Cloud Platform (Compute Engine VMs, CUDA/GPU Compute), REST APIs
Database & Services: Firebase (Auth, Firestore, Cloud Storage, Push Notifications)
How I Work With Clients:
Clear Architecture First: We nail down the app flow, backend architecture, and third-party API costs before writing code.
Fast MVP Milestones: You get regular APK/TestFlight builds to test features on real devices as they are built.
Clean, Documented Code: Well-structured Flutter codebases and API docs that your team can maintain and scale effortlessly.
$300/hr
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AI Solutions | Full Stack Development | AWS Cloud | DevOps
I'm a Full Stack Developer and DevOps Engineer who helps businesses build modern software, automate workflows, and deploy secure cloud solutions.
I have experience developing:
AI-powered business automation platforms
SaaS web applications
Real-time tracking and dispatch systems
Billing and business management software
AI-based recruitment and resume matching systems
Email automation platforms
I also specialize in AWS Cloud, Docker, Kubernetes, Jenkins, CI/CD pipelines, APIs, and database management.
My goal is to build reliable, scalable, and easy-to-use solutions that save time, improve efficiency, and help businesses grow.
Whether you need a custom web application, AI solution, cloud infrastructure, or DevOps support, I'm here to deliver high-quality solutions tailored to your business.
Let's work together to build your next project!
France
$100/hr
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I am a Full Stack Developer with a focus on Java and Angular, blending technical expertise with agile methodologies to create robust and scalable solutions. With experience in end-to-end application development, I optimize performance and manage incident resolution and application maintenance effectively. I am adept at understanding business needs and translating them into impactful digital solutions. My background includes working on diverse projects that require a keen eye for detail and a commitment to quality. If you need a developer who can navigate complex challenges and deliver polished results, I am ready to help. Let's discuss your project and find the best ways to achieve your goals.
$60/hr
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CAPABILITIES
Engineering
Flutter / Dart · React · Next.js ·
JavaScript / TypeScript · Firebase ·
AWS · REST & API design · system
architecture.
Design & 3D
UI / UX · design systems · motion &
interaction · real-time 3D (React
Three Fiber) · Blender.
AI-Native Tooling
Cursor · Windsurf · Trae AI · GitHub
Copilot.
Engineering Practice
Solo end-to-end delivery · RTL /
localization · Git · rapid prototyping to
production.
PROFILE
Full-stack developer and self-taught product builder who ships
production-grade applications end to end - architecture, code,
interface, and motion. Founder of two ventures and sole builder of
Adeo , a peer-to-peer learning platform for university students,
blending engineering rigor with editorial design.
$98/hr
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Senior Full-Stack Developer | 135+ Projects Delivered
I’m a hands-on full-stack developer, product builder and business owner with experience delivering 135+ client projects, maintaining a 5/5 client satisfaction record across my work outside Upwork.
I build complete SaaS platforms, web applications and internal business systems, from product architecture and UX to development, integrations, deployment and ongoing optimization.
My primary development stack includes Next.js, React, TypeScript, JavaScript, Supabase, PostgreSQL, Node.js, Stripe and Vercel.
Beyond software development, I actively run a digital marketing agency working with a wide range of Scandinavian companies. Through our work, we have helped clients generate more than €13.4 million in yearly revenue.
This gives me a commercial perspective that goes beyond writing code. I understand how software, user experience, marketing and sales need to work together to create a product that actually performs.
My experience also includes:
SaaS & custom web applications
Customer and membership portals
Authentication & user management
Stripe subscriptions and payments
Admin dashboards
API integrations & automation
Database architecture
Responsive and mobile-first interfaces
Analytics, attribution and tracking
Web design
Meta Ads
Google Ads
Email & SMS Marketing
Conversion optimization
Marketing automation
I focus on building software that is simple to use, commercially useful and maintainable. Not technology for technology’s sake.
You work directly with me throughout the project. I speak and write fluent English and am comfortable handling everything from technical architecture and development to product strategy and commercial discussions.
New to Upwork — not new to building businesses and software (9 years of experience)
$75/hr
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Fullstack Developer | Symfony, React, Node.js | E-commerce & APIs
Besoin d'une plateforme e-commerce évolutive, d'une API robuste, ou d'une IA intégrée à votre produit ? C'est ce que je construis.
J'aide les entreprises et startups à construire des plateformes digitales performantes — de l'architecture backend aux interfaces modernes et conviviales.
Je construis des plateformes e-commerce (multi-vendeurs, paiement en ligne, SEO) avec Symfony et React.js
Je conçois et documente des APIs REST robustes avec Node.js, Express et PostgreSQL
Je crée des dashboards analytics en temps réel (React.js, Node.js, WebSocket)
Je développe des applications mobiles avec Flutter
J'intègre des agents IA dans les solutions clients
Je gère le cycle complet des projets de façon autonome, de la conception de la base de données au déploiement (Docker, CI/CD)
Parmi mes projets récents : une plateforme e-commerce multi-vendeurs (Symfony, API Platform, MySQL), un dashboard analytics en temps réel, et une API REST documentée pour une application mobile (Node.js, PostgreSQL, JWT).
J'allie de solides compétences techniques à une vision business axée sur le ROI, la conversion et l'expérience utilisateur. Parlons de votre projet — envoyez-moi un message, je vous répondrai rapidement.
$80/hr
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I'm a Senior Full Stack Software Engineer with nearly 10 years of experience designing, building, and scaling web applications, APIs, AI-powered software, and SaaS products. I've worked with startups and enterprise organizations, taking products from initial idea through architecture, development, deployment, and long-term support.
I specialize in building modern, scalable software using Python, Django, React, Next.js, SQL, and AI technologies including OpenAI, Gemini, and Perplexity. Whether you need a new application, AI integration, backend API, database design, or help improving an existing system, I can deliver solutions that are maintainable, secure, and built to scale.
What I can help with:
* Full-stack web application development
* AI application development and LLM integrations
* REST API design and backend architecture
* Database design and performance optimization
* SaaS product development
* System architecture and technical consulting
* Bug fixing, feature development, and application optimization
I believe successful software is about more than writing code. I work closely with clients to understand their goals, communicate clearly throughout the project, and build solutions that create long-term value.
$100/hr
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I specialize in building robust AI solutions that drive significant business impact. With 22 years of experience, I have a proven track record of architecting LLM-powered systems and scalable AI infrastructure, ensuring efficient experimentation and reliable deployment. My expertise includes Generative AI, cloud-native architecture, and data platforms, which I leverage to lead cross-functional teams in delivering complex projects.
I excel in prompt engineering, API design, and developing microservices, always prioritizing measurable performance gains. My leadership in 0*1 and 1*N initiatives proves my ability to align technical strategies with overarching business goals. If you need a technical partner to innovate and implement high-quality AI solutions, let’s connect and discuss how I can help elevate your project to the next level.
United States
$69/hr
40%
Job Success
Available now
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I'm a versatile and experienced developer with a strong background in full-stack web development, mobile application development, and DevOps. I am passionate about leveraging my team’s skills to build efficient, scalable, and secure solutions for any project. Whether it's creating intuitive web interfaces, designing robust backend systems, or automating complex workflows, we bring a wealth of experience and customization to every project.
~~~ Services Offered ~~~
- Frontend Development: React.js, Vue.js, Angular.js, Next.js, HTML, CSS, TailwindCSS, Electron.js, React Native
- Backend Development: Linux, Node.js, Express.js, Python, Django, Java, Spring, C#, ASP.NET, PHP, Laravel
- Content Management Systems (CMS): WordPress, Shopify, Sharetribe, SharePoint
- Databases: SQL, MySQL, PostgreSQL, NoSQL, MongoDB
- Blockchain Technologies: Web3.js, Smart Contracts
- AI Integration: ChatGPT, OpenAI, NLP
- Mobile Development: Swift (iOS development available upon request)
Let’s connect and explore new possibilities together.
Associated with
LimitlessAI
$250/hr
$0 earned
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PROFILE
Motivated and passionate IT student with a keen interest in software development and application design.
Proficient in programming languages such as Java and JavaScript, with experience in developing web and
desktop applications. Strong understanding of object-oriented programming, data structures, algorithms, and
database management.