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Highly accomplished Software Engineer with 8+ years of experience, I've built and scaled user-centric applications across healthtech, web3, fintech, marketing, SaaS, and automation. I thrive on delivering impactful solutions, mentoring teams, and driving growth. From frontend to backend, I focus on building efficient, scalable, and innovative products. Passionate about AI, I leverage LLMs, Retrieval-Augmented Generation (RAG), and Prompt Engineering to create intelligent applications that solve real-world problems. In my free time, I play video games and hang out with friends and family. My experience with tools and technologies listed below makes me well-suited for your projects and team. Front End: React, Next.js, JavaScript, Typescript, Redux, Zustand Redux-Saga, React Hooks, ReactQuery, ChakraUI, MaterialUI, Angular, Styled Components, Storybook, GraphQL, Ant Design, CSS3, SCSS, Bootstrap, HTML5 Back End: JavaScript, TypeScript, NodeJs, ExpressJs, GraphQL, REST API, Prisma, Sequelize, Postman, Swagger, Solidity, Foundry Data Stores: Postgres, MySql, MongoDB, Redis AI & LLM Technologies: Prompt Engineering, Retrieval-Augmented Generation (RAG), LangChain, LangSmith, OpenAI API, LLMs Operating Systems: Mac OS, Windows 10+, Linux - Ubuntu Log Management/ Error Tracking: Segment, Rollbar, Sentry Source Control: Git, Github, Gitlab, Bitbucket Test Tools: Jest, Playwright, Cypress, React Testing Library IssueTracking/ Documentation: Jira, Confluence, Linear, Methodologies: Agile, Scrum, Pair Programming CI / CD: Circle CI, Travis CI, Github Actions Cloud / Containers: Docker, AWS (S3, EC2, Cloudfront, CloudFormation, Lambda) I am a strong team player with excellent problem-solving and communication skills, In addition to my knowledge base, I actively seek out new technologies, and stay up-to-date on industry trends and advancements. This has allowed me to deliver impressive work to my employers having worked with startups, medium and relatively large companies. I am excited about the opportunity to work in a fast-paced environment with a tight-knit group of engineers and to assist in scaling the engineering processes to increase velocity and drive success. I am confident that my skills and experience make me the perfect for your team and project.

AI-focused Technical Leader and hands-on Engineer with 22+ years building products from zero to production. I architect and ship AI-powered SaaS, B2B/B2C platforms, and enterprise systems - writing code daily while leading teams and strategy. 📞 Invite me to your job for a FREE 15-minute consultation! 📞 Highlights: 🤝 56,000+ hours & 220+ jobs completed (with my Upwork agency), all with 5-star reviews 🤝 Top 1% of All Talent on Upwork & "Expert Vetted" Badge 🤝 $2M+ revenue generated on Upwork alone 🤝 18+ years of Senior Technology Executive management experience in roles such as CEO, CTO, VP R&D, Head of Engineering, Systems/Software/Cloud Architect, DevOps, PM, etc. Technical leadership and managing remote and on-site teams of up to 30 What I Do: I help companies build AI-first products - from initial architecture to production. Think of me as your remote, hands-on CTO and Lead Engineer: I design systems, write code, manage engineering teams, collaborate with designers on UX, and ship. My company builds large open-source platforms (ERP/CRM/HRM, Commerce, Work / Project Management), and I bring that same 0-to-1 product-building experience to every client engagement. Over the years, I've helped hundreds of companies, from startups to large international enterprises, and have conducted business in the US, Israel, Ukraine, and Bulgaria. Worked remotely with companies worldwide: US, UK, Norway, Ukraine, India, Australia, etc. Worked on multiple highly complex commercial projects, both in startup and enterprise environments, with small and large teams. I can work with the team or develop software independently from the ground (to production), keeping the software quality along the way extremely high! Rates: - Short-term / consulting: $180/hr - Long-term engagements: $120/hr Services: - AI strategy, architecture & implementation for existing and new products - Fractional CTO / technical leadership for startups and scale-ups - Product architecture, estimation & 0-to-1 builds - Code reviews, performance optimization & solving complex technical problems - Team mentoring and engineering process improvement (Agile/Lean) Short summary of software engineering expertise: ◾ AI Agents & Multi-Agent Systems (LangChain, CrewAI, AutoGen, custom orchestration) ◾ LLM Integration (OpenAI / ChatGPT, Anthropic / Claude, Gemini, local models) ◾ RAG Pipelines, Embeddings, Vector Search, AI Chatbots ◾ ML / Deep Learning (TensorFlow, PyTorch, Python) ◾ SaaS (B2B & B2C) / Multi-tenancy Architecture ◾ Cloud & DevOps: AWS, Azure, GCP, Docker, k8s, CI/CD, Serverless ◾ 15+ years with .NET / C# ◾ 10+ years with JavaScript / TypeScript ◾ 5+ years with Node.js / NestJS ◾ Python (AI/ML, Django, Serverless), Java, and more In technology, my focus spans AI-powered systems, Web, Mobile & Distributed Software: - AI & ML: LLM orchestration (OpenAI, Anthropic, Gemini), AI agents, RAG, vector databases, TensorFlow, PyTorch, prompt engineering, fine-tuning. - Backend: Node.js / NestJS, .NET / ASP.NET Core, Python, JS / TypeScript. - Frontend: React/ReactNative, Angular, Vue. - Data: PostgreSQL, MongoDB, MS SQL, MySQL, Kafka, RabbitMQ, ElasticSearch. - Cloud & DevOps: AWS, Azure, GCP, Docker, Kubernetes, Serverless, CI/CD. Some of the latest OSS projects include: - An Agentic Runtime that Autonomously Builds and Maintains Web Apps - Orchestration System for Autonomous AI Companies - AI-powered Open-Source ERP/CRM/HRM Platform - Work and Project Management Platform with AI features - Modern Commerce Platform (reactive server, mobile & web apps) Feel free to message me to get more details about my experience relevant to your specific project, I am always open to new opportunities! 📞 Reach out by inviting me to your project right now! 📞 Looking forward to working with you on amazing projects, - Ruslan

You need software that solves a real problem, built right the first time, by people who understand your business and not just your stack. I'm Orest, founder of SoftDoes. We're a U.S.-based custom software firm working with: • Non-technical founders with a vision • Technical leaders who need help but not additional headcount • Business operators solving operational complexity Our team has delivered across healthcare, fintech, construction, legal, real estate, and regulated industries where compliance-readiness is required and getting it wrong isn't an option. Our clients tend to show up in one of three situations: they have a product vision and need someone to build it, they have internal engineering that's stretched too thin, or they have operational complexity that off-the-shelf software simply can't fix. We've handled all three. What we deliver: • Custom software and SaaS platforms built for scale • AI implementation and automation built into real workflows • Web and mobile applications • Cloud infrastructure on AWS, GCP, and Azure • Full-stack development across React, Next.js, Node.js, and Python What clients tell us, consistently: we listened, we delivered what we said we would, and they didn't have to babysit us to get there. A healthcare founder went from concept to a live, compliant product in under six weeks. A construction company replaced five fragmented tools with one custom operations platform. A fintech team cut onboarding time in half with an AI-assisted workflow we built in a single sprint. We work best with companies that are big enough to need real software and clear-eyed enough to know that building it wrong the first time costs more than doing it right. If that's where you are, let's talk. 🇺🇸 U.S.-based. U.S.-led. Kansas City, MO. Services: Custom software development SaaS development Enterprise software Web application development Mobile app development Full-stack development Product development / MVP build Platform modernization / rebuild Systems integration Workflow automation Business process automation API development / API integration Backend development Frontend development AI development AI integration AI automation LLM integration RAG (Retrieval-Augmented Generation) AI chatbot development Document AI AI-powered workflows Prompt engineering AI agents Data extraction automation React Next.js Node.js Python TypeScript JavaScript REST APIs GraphQL PostgreSQL AWS Google Cloud (GCP) Microsoft Azure Vercel Docker Terraform CI/CD Cloud / DevOps keywords Cloud architecture Infrastructure as code DevOps Deployment automation Scalability / performance optimization Reliability engineering Monitoring / observability HIPAA compliance / healthcare software PCI / fintech software SOC 2 readiness (if applicable) Security best practices Compliance-ready systems Audit-friendly systems Role-based access control (RBAC) Operations platform Internal tools CRM/ERP custom build Data pipelines Dashboards & reporting Process digitization Tool consolidation Onboarding automation

Most businesses don't need another dashboard; they need software that eliminates manual work, connects their systems, and helps their team move faster. That's what I build. I'm a Certified Retool Expert and Full-Stack Developer with 10+ years of software engineering experience, including 4+ years building production-grade Retool applications for startups, SaaS companies, agencies, and enterprise teams. I design and build complete business applications from the database and APIs to AI-powered workflows and intuitive user interfaces. What I Build: ✔ Internal business applications ✔ Customer portals ✔ Admin panels & CRMs ✔ Executive dashboards ✔ AI-powered business tools ✔ Workflow automation ✔ Billing & reporting platforms ✔ Inventory & operations management systems ✔ Data pipelines & analytics platforms What I Can Help You With Retool Development: • Multi-page applications • Custom Components • Modules • Permissions & Authentication • Workflows • Forms • Query Optimization • Staging → Production Deployments • Embedded Retool Applications Full-Stack Development • React • Node.js • Python • TypeScript • Lambda • REST APIs • GraphQL • PostgreSQL • MySQL • MongoDB • Firebase • Supabase AI & Automation • OpenAI & GPT integrations, OpenAI API • Claude, Claude Code, Claude API • AI Agents • RAG Applications • OCR & Document Processing • Workflow Automation • n8n • Zapier • Make com • Scheduled Jobs • Webhooks Data Engineering • BigQuery • Snowflake • Redshift • Athena • ClickHouse • ETL Pipelines • Data Warehousing • Analytics Dashboards • Performance Optimization Integrations: I regularly integrate business applications with: Stripe • Xero • QuickBooks • Shopify • HubSpot • Salesforce • Slack • Twilio • Google Workspace • AWS • Firebase • Supabase • Airtable • OpenSearch • Elasticsearch • Google Analytics • Mixpanel • PostHog • OAuth2 APIs • REST APIs • GraphQL APIs What Clients Value: I don't simply build what is requested. I take time to understand your business, identify bottlenecks, and recommend improvements that reduce manual work, improve data accuracy, and save your team hours every week. Clients work with me because I deliver: ✔ Clean, maintainable code ✔ Fast communication ✔ Scalable architecture ✔ Reliable long-term solutions ✔ Business-first thinking Whether you're building a new SaaS product, modernizing internal operations, integrating AI into your workflows, or scaling an existing Retool application, I can help you build a solution that's reliable, scalable, and easy to maintain. Send me a message with your project or idea, and I'll help you determine the best technical approach before you commit to hiring.

I develop top-quality mobile, web, and desktop apps, often with AI features. I also work as a UX consultant and IT project manager. I always strive for excellent software — delivering average work is not an option for me. I put 100% effort into everything I do and always walk the extra mile. The result is apps that users love to use and that meet business goals. What I do: • mobile and multi-platform apps in Flutter (iOS and Android, web and desktop) • AI integrations, I enjoy solving advanced AI problems (e.g. by stacking AI models, distillation, fine-tuning, MoE, RAG, etc.) • complex software systems consisting of multiple connected applications • UX consultancy, UX audits (just UX, I am not a designer) • I lead a team of very talented software developers focused on Flutter, AI, and complex systems I am a member of the prestigious Toptal network and part of Upwork’s 🏆Expert-Vetted Talent🏆 program, which unites the top 1% of freelancers on Upwork (badge visible to enterprise clients only). Hiring top talent greatly enhances your business's chances of success! What I bring to the table: ✓ 13 years of combined development, consulting & tech leadership experience ✓ creative solutions, ideas & improvements ✓ an agile process that lets you stay on top of progress and quality ✓ highest engineering & algorithmic competence ✓ strong work ethics & accountability ✓ focus on detail, almost to a degree of perfectionism ✓ truly fluent in English with strong communication skills ✓ ability to speak simply and clearly about engineering and align it with business goals ✓ always up-to-date with cutting-edge tech ✓ master's degree in software engineering from a top EU university, where I now lecture on Flutter ✓ 12 years of AI and ML development experience with excellent knowledge of state-of-the-art AI models, development techniques, and APIs Have a question? Need tech consulting or want to build a mobile app? Drop me a line!

I help businesses build professional websites, ecommerce stores, landing pages, dashboards, and automation systems that actually support sales and operations. I work mainly with Shopify, WooCommerce, Webflow, GoHighLevel, WordPress, and custom full-stack applications. I also build AI and automation workflows using tools like OpenAI, n8n, Make, Zapier, Airtable, Google Sheets, CRMs, and custom APIs. What I can help you with: • Shopify store setup, redesign, product pages, landing pages, custom sections, checkout improvements • WooCommerce stores, product bundles, checkout flows, payment setup, order automation • Webflow websites, responsive landing pages, CMS setup, design-to-Webflow builds • GoHighLevel funnels, landing pages, CRM setup, forms, automations, email/SMS flows • AI automation using OpenAI, Claude, Gemini, n8n, Make, Zapier, Airtable, Google Sheets and APIs • Full-stack web apps using React, Next.js, Node.js, Python, Supabase, PostgreSQL and REST APIs • Website speed optimization, bug fixing, domain setup, tracking pixels, Google Search Console and analytics I focus on clean design, clear user flow, mobile responsiveness, fast loading speed, and practical automation that reduces manual work. I have worked on ecommerce stores, SaaS dashboards, AI tools, internal portals, automation workflows, and business websites for clients across different industries. If you need someone who can handle both the website side and the backend/automation side, I can help you plan, build, test, and launch the full solution.