I build software that makes businesses money. Recent example: a sales and payments platform for a real estate company that cut their overdue payments from $2.3M to $145K in two months. Before running my own studio, I was a software engineer at Twitter, working on data systems that processed 100M+ events daily. I bring that level of engineering to smaller companies: MVPs for founders, SaaS platforms, internal tools, and custom builds. What I do best: MVP development for startups (React, Next.js, Node.js, PostgreSQL) SaaS platforms and dashboards Real estate and fintech software (sales pipelines, payments, KYC) AI integrations (OpenAI, Anthropic, Stability) WordPress for businesses that need it done right I run Metriqz, a small NYC studio. You work directly with me, not a project manager. If you have an idea or a system that's outgrown spreadsheets, let's talk.

I’m a Senior Software Developer with over 10 years of professional experience specializing in full-stack web and mobile application development. Throughout my career, I have designed and developed scalable, high-performance applications using modern technologies across frontend, backend, cloud infrastructure, and mobile platforms. My expertise includes building responsive web applications with React, Next.js, Vue.js, TypeScript, and Tailwind CSS, as well as developing backend systems using Node.js, NestJS, PHP, Laravel, Python, and RESTful APIs. In addition to web development, I have experience creating cross-platform mobile applications using React Native and Flutter, delivering seamless user experiences for both iOS and Android platforms. I am highly skilled in database architecture and cloud services, including PostgreSQL, MongoDB, Firebase, Supabase, AWS, and Docker-based deployments. I have worked on various projects such as SaaS platforms, AI-powered applications, e-commerce systems, booking platforms, automation tools, and real-time communication systems. I also have hands-on experience integrating third-party services like Stripe, Twilio, OpenAI APIs, and payment gateways while maintaining secure and scalable architectures. As a developer, I focus on writing clean, maintainable, and optimized code while collaborating effectively with cross-functional teams in agile environments. I am passionate about solving complex technical challenges, improving user experience, and continuously learning modern technologies to build innovative digital products.

I am a Product-Focused Mobile Engineer with over 10 years of experience delivering high-impact solutions that balance technical excellence with business growth. My approach goes beyond writing clean code; I partner with clients to refine product vision, optimize user retention, and build scalable architectures that evolve with their users. I build complete technical ecosystems. While I excel at creating high-performance interfaces with Jetpack Compose and SwiftUI, my core focus is on delivering end-to-end product solutions—architecting everything from serverless backends and database structures to web and mobile frontends. I bridge the gap between complex business logic and intuitive user experiences. By handling the entire technical stack, I ensure that your mobile, web, and data layers are perfectly synchronized to solve real-world problems. My End-to-End Toolkit: • System Architecture: Building scalable serverless backends and custom cloud-based database solutions. • Integrated Ecosystems: Seamlessly connecting native Android/iOS applications with responsive web platforms. • Data Intelligence: Architecting real-time pipelines and advanced visualization engines using Firebase and BigQuery. • Enterprise Security: Implementing secure, custom systems like Device Policy Controllers for robust fleet management. Maintaining a 100% job success rate, I specialize in launching comprehensive technical systems on schedule. Let’s work together to architect and build the fully integrated product your business needs to succeed in a competitive market.

Complex SaaS products need designers who understand both craft and constraints, not just pixel pushers who hand off pretty mockups and disappear. With 15+ years of product design experience, I work as an embedded designer with SaaS teams and founders, partnering long-term with product and engineering to improve usability, adoption, and conversion across complex applications. • Top Rated Plus on Upwork • 100% Job Success Score • 150+ client engagements across UK, US, and EU • Many clients stay for 5+ years ⸻ What Makes This Different Most designers deliver screens. This approach delivers systems, scalable, production-ready, and built to evolve with your product. I understand engineering constraints, think in user outcomes (not just aesthetics), and stay with products as they grow. Many clients return for years because the work actually ships and performs. Product & UX Design • User research, discovery, and problem framing for complex workflows • User flows, journey mapping, and interaction design • Usability optimization for SaaS dashboards and data-heavy interfaces UI & Design Systems • High-fidelity UI for SaaS dashboards and web apps • Scalable Figma design systems and component libraries • Responsive design for desktop and mobile AI-Assisted Product Design • Using AI to speed up research synthesis and ideation • Designing AI-powered features and workflows • Improving clarity and trust in AI-driven interfaces Build & Collaboration • Smooth handoff to engineering (I understand the code) • Webflow, WordPress, and front-end-aware design • Long-term collaboration with agile product teams ⸻ Tools & Stack Figma, FigJam, Framer, Miro Webflow, WordPress, React, Tailwind Hotjar, Maze, GA AI tools (used thoughtfully, not blindly) ⸻ Why clients choose to work with me • I specialize in real products, not just marketing pages • I’m comfortable with complex systems and constraints • I think in terms of outcomes, not just screens • I’m reliable, proactive, and easy to work with, many clients stay for years ⸻ Available for ongoing engagements (20–40 hrs/week) where I can take ownership, improve the product over time, and work closely with your team. Best fit for companies that value: • Real products over marketing pages • Long-term thinking over quick fixes • Designers who understand business goals and technical constraints • Proactive partners, not order-takers Portfolio: octavian.design

Do you want to SHOOT someone? Than it is NOT to me. On all other tasks please count on me. And I also make websites and do programming ;-) ------------------------------------------- Some technical details: • My frontend stack: Vue (Nuxt, Pinia), React (Redux, Next, ReactNative), Angular, Ember. • My backend stack: Python, NodeJs (NestJs, Express), PHP (Laravel, YII) • I optimize for: Windows, MacOS, iOS, Android • DBs and Data management systems: MySQL, PostgreSQL, MongoDB , Redis, RabbitMQ • I use in my work process: Agile, Scrum, Git Flow, CI/CD, TDD, SOLID principles and unit testing. ------------------------------- I have finished more then 50 project and startups, and I will be glad to make and lead to the finish yours as well. Please contact me if you need it :) Regards, Vlad.

Mobile apps should do more than look good - they should help businesses grow. I help companies turn ideas into scalable mobile products that improve customer retention, increase engagement, and create new revenue opportunities. From product strategy and UX design to Flutter development, Firebase integration, analytics, monetization, and App Store / Google Play deployment, I manage the entire product lifecycle with a strong focus on business outcomes. As the founder of a commercially launched mobile application, I understand both the technical and business side of building successful digital products. If you’re looking for a developer who thinks beyond code and focuses on creating measurable value, let’s talk.

I am a freelance software developer specialized in DSP design and tools for audio the and music industry. I have over 5 years experience in using the JUCE framework for audio plugins as well as development for IOS and Android Apps

You don't have a data problem. You have a system design problem. Most teams working with analytics platforms struggle when data ingestion, APIs, databases, and internal dashboards start growing together. The first version works, but the architecture becomes difficult to maintain when real users, larger datasets, and more integrations arrive. That's where I help. I'm a Full-Stack + Backend Engineer with 10+ years building production-ready SaaS platforms, data-driven applications, API systems, and AI-powered products for startups and enterprise teams. I specialize in building reliable backend services, data pipelines, internal dashboards, and scalable systems using Go, Python, TypeScript, PostgreSQL, MongoDB, and cloud infrastructure. ━━━━━━━━━━━━━━━━━━━━━━ WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━ • Backend systems & API platforms - Go (Golang), Python, Node.js, REST APIs • Data-driven applications - ingestion pipelines, analytics platforms, reporting systems • Internal dashboards & admin tools - React, Next.js, TypeScript, data visualization • SaaS platforms - multi-tenant architecture, authentication, permissions, billing • AI-powered applications - RAG pipelines, LLM integrations, workflow automation • Cloud systems - Google Cloud Platform, AWS, Docker, CI/CD ━━━━━━━━━━━━━━━━━━━━━━ MY STACK ━━━━━━━━━━━━━━━━━━━━━━ Web → React, Next.js, TypeScript, Tailwind CSS Mobile → React Native, Expo, Expo Router Backend → Go (Golang), Python (FastAPI, Django), Node.js, Express AI / LLM → OpenAI, Claude, LangChain, RAG, Vector Search, Agents Database → PostgreSQL, MongoDB, Supabase, Redis, SQL/NoSQL Data Modeling DevOps → Google Cloud Platform, AWS, Docker, CI/CD, Vercel ━━━━━━━━━━━━━━━━━━━━━━ HOW I'M DIFFERENT ━━━━━━━━━━━━━━━━━━━━━━ I have experience building systems where multiple data sources flow into backend services, databases, APIs, and user-facing dashboards. This includes third-party API integrations, data processing workflows, analytics dashboards, and internal tools that help teams make faster operational decisions. Most developers will build exactly what you ask for even when it's the wrong thing. I won't. After 10 years across startups, SaaS, and enterprise, I know which decisions cause problems at scale, and I'll tell you before we start not after you've paid for them. One engineer. Web, mobile, and AI. No handoffs, no coordination overhead, no agency markup. Clients don't come back for the code. They come back for the judgment. ━━━━━━━━━━━━━━━━━━━━━━ LET'S TALK ━━━━━━━━━━━━━━━━━━━━━━ Send me a message with what you're building. I'll tell you honestly what to start with, what to skip for now, and whether I'm the right fit. No pitch, no pressure.

✅ TOP RATED PLUS EXPERT (top 1% of performers on Upwork), specializing in mobile native and hybrid apps. (iOS, Android, React Native) ✅ 10+ years of experience building mobile software for clients like Apple, Facebook and more, I am the developer who will complete your project with the highest quality and satisfaction within the agreed upon timeframe. Developing good rapport with excellent communication is important to me and I guarantee 100% satisfaction!

Hi I am Sebastian. 👉 Recently Equaled World Chess Champion!!! ✔️ Go Fiber, Php, Python Django APIs 12 years ✔️ Laravel 8 years, React 5 years ✔️ MongoDB/ MySQL 15 years, E-commerce 6 years ✔️ AWS 10 years, Cloud 10 years. ✔️ ECS / Fargate / Docker 8 years. ✔️ 7 Years managerial and project management experience in England ✔️ 4 Years Flutter 💡 The Nitty-Gritty: I will be eager and looking forward to: ✔️ Being a code detective by identifying and fixing any pesky bugs in Cloud Architecture, API services, websites, or apps. ✔️ Keeping any projects in tip-top shape. ⌛ What’s the Time Commitment? 5-6 days a week sounds great for starters 😊. I will love to gradually become more involved! In my last project I was so committed that I made it from programmer to Project Manager and then to CTO. 🚀 Let’s Do This!