Hire the Best Front-End Developers
in Lithuania

Professional audio is the heartbeat of engaging content. Whether you are releasing a track, launching a podcast, or producing a video, I provide professional results that ensure your project sounds polished. How I Can Help You: Mixing & Mastering: I deliver balanced, impactful mixes that translate perfectly across all playback systems. I handle EQ, compression, and loudness normalization to ensure your audio meets strict industry standards. Audio Restoration & Cleanup: I use iZotope RX to rescue difficult recordings. I surgically remove hiss, hum, wind, mouth clicks, and reverb to make dialogue sound pristine without losing its natural character. Sound Design: Creating custom soundscapes, foley, and SFX for video, animation, and podcasts. Video Post-Production: I am proficient in DaVinci Resolve, ensuring your audio syncs perfectly with your visual edit.

Most "AI developers" can wire ChatGPT to a database. I build agent systems that survive in production — orchestrators with retries, state management, observability, and cost control. 6+ years as a Software Engineer, now full-time System Engineer building AI-driven SaaS at Mplus (DE), available for select Upwork projects. I'm Martin — Top Rated, 100% JSS, 5★ across all closed contracts. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I ACTUALLY SHIP → Production AI agents that don't fall over Stateful agents with retries, tool routing, error recovery, observability, and cost control — not a demo that breaks on the second user. → Custom orchestration when frameworks aren't enough LangGraph and Claude MCP where they fit. Custom architectures when your workflow doesn't fit a framework. I design the agent system — I don't just bolt one together. → Claude & OpenAI integrations done seriously Anthropic Claude with Tools and MCP, OpenAI Assistants & Agents SDK, function calling, structured outputs, streaming, hybrid model routing for cost/latency trade-offs. → Full-stack delivery around the agent Python for the AI layer, Node/TypeScript for APIs and web. Postgres, pgvector, queues, webhooks. The agent isn't the product — the system around it is. I build both. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ CURRENT WORK (gives you a sense of what I do day-to-day) System Engineer at Mplus (DE) — building an AI-driven SaaS for residential energy efficiency analysis: B2C assessment tools plus a B2B contractor marketplace. Real users, real production. Past: R&D monitoring system for a Tel Aviv pharmaceutical client. High-traffic B2C platform with 1.2M+ users at Enkonix (AWS, message queues, cross-team integrations). ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ MY STACK AI Layer: Anthropic Claude (Tools, MCP), OpenAI Assistants & Agents SDK, LangChain, LangGraph, custom orchestration Backend: Python (primary), Node.js, TypeScript, FastAPI, Express Data: PostgreSQL, pgvector, Redis, MongoDB, Supabase Infra: AWS, Vercel, Docker, queues, webhooks, observability Web: React, Next.js (when the agent needs a UI around it) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW I WORK Day 1-2: Discovery call. I map your agent's workflow, edge cases, and failure modes BEFORE writing code. Week 1: First working agent loop in staging — you run real inputs against it. Ongoing: Async updates, weekly demo, observability dashboard so you see what the agent is doing. Handoff: Clean repo, README, evals, deployment docs, runbook for common failures. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ NOT A FIT IF YOU NEED: ✗ "Build me a ChatGPT clone" — that's a wrapper, not an agent ✗ Pure prompt engineering with no system behind it ✗ Trading bots, gambling, or crypto-trading AI ✗ The cheapest bid — I'm not it ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ If you've hit reliability walls with n8n + GPT, or you're past the prototype stage and need a real system — send me the brief. I'll come back with a scoped architecture plan, not a generic pitch. — Martin

Hi! I’m Redas, a 2nd-semester student with a strong passion for programming and working on side projects. I love learning new technologies and turning ideas into functional applications. I’m eager to help clients with C# development, automation, CSS or HTML and deliver results efficiently. Let’s collaborate to bring your project to life!

I am a seasoned UI/UX Designer & Front-End Developer with over 5 years of experience crafting high-converting, responsive websites and digital products. I specialize in modern web design, intuitive user experiences, and clean front-end development using Figma, HTML, CSS, and JavaScript. My expertise lies in creating visually stunning and highly functional web solutions for SaaS, B2B platforms, ecommerce stores, dashboards, marketplaces, AI tools, and startups. I combine strong UI/UX design skills with front-end development to deliver pixel-perfect, responsive websites that drive conversions, improve user retention, and accelerate business growth. Key Expertise: UI/UX Design & Prototyping: Wireframes, user flows, interactive prototypes, and high-fidelity designs in Figma Modern Web Design: Custom, responsive web design, landing pages, and conversion-focused interfaces Front-End Development: HTML, CSS, JavaScript, responsive development, and design-to-code implementation No-Code & Website Builders: Expert in Webflow, Framer, WordPress, Elementor, and Shopify Ecommerce & SaaS: Shopify website design, SaaS dashboards, B2B platforms, and CRO-optimized experiences I excel at turning Figma designs into fully functional, responsive websites using modern development practices. Whether you need a complete web redesign, high-converting landing page, SaaS platform UI/UX, or pixel-perfect front-end development, I deliver fast, strategic, and results-driven solutions. Tools & Technologies: Figma, Webflow, Framer, WordPress, Elementor, Shopify, HTML, CSS, JavaScript, Responsive Design, UX Wireframing, and UI/UX Prototyping. With a strong track record of successful projects and satisfied clients, I help businesses transform ideas into professional, user-friendly, and high-performing websites. Ready to bring your vision to life with modern web design and development? Let’s discuss your project and create something outstanding together.

Frontend nextJS and design. I am a TOP RATED freelancer on Upwork with more than 20 years of experience with UX/UI design and 10 in front-end development. I have a big passion for developing and lunching amazing projects My skills: - next is, react, tailwind, tailwind / bootstrap / foundation and others - web and mobile design. UI/UX, Figma - html / pug / JS / SASS / CSS / jinja / nunjucks, BEM, Webpack / GULP / NPM / git. I worked with so much things that hard to list them all. DM to discuss you project

6+ Years of experience in Frontend development field. 💯 Expertise in building dynamic user interfaces with React.js, Next.js and React Native. 🚀 Proficient in optimizing performance, enhancing site speed, and implementing SEO best practices. ✅ Skilled in implementing responsive design and modern UI/UX principles for visually appealing web applications. "Mintaras helped us with a variety of problems with the site: from database and formatting issues to problems with site migration to a new server. His English is excellent and he is honest, quick, and reliable. We don't have a lot of money and he worked within our budget. I recommend him highly." Latest showcases: ✅ Converted Figma designs into responsive and interactive landing pages using React.js & Next.js. Developed and tested multiple user registration flows to ensure a smooth onboarding experience. - Successfully launched high-converting landing pages, driving a 25% increase in user sign-ups. - Enhanced security and user experience through robust and tested registration flows. ✅ Regularly updated the platform using React.js and TypeScript to incorporate new insurance products and comply with regulatory changes. Conducted code reviews and refactoring to ensure code quality and performance. Worked closely with backend developers to integrate RESTful APIs and ensure smooth data flow between the front-end and back-end systems. Coordinated with UX/UI designers to implement user-friendly interfaces. - Improved data accuracy and reporting capabilities, enhancing decision-making processes for brokers. - Achieved high user adoption rates and positive feedback from agents and brokers. ✅ Implemented the front-end of the lending platform using React.js, Redux ensuring a seamless and responsive user interface. Integrated various API endpoints for data processing. Conducted performance optimizations to reduce page load times and enhance the overall user experience. Utilized Cypress for end-to-end testing to ensure reliability and functionality across different user scenarios. - Reduced average loan application time by 30%. - Increased user satisfaction through improved UI/UX and enhanced performance.