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CLIENT WORK Clients have been hiring me to help them with the following: reverse-engineering both ELF and PE binaries; writing performance-critical programs for desktop computers and microcontrollers alike; designing custom PCBs (experience with up to 8 layers), including ones carrying these ICs: STM32s, various BGA/QFP FPGAs, crypto modules, SRAM and NAND flash, frequency synthesizers, and power regulators; writing client-server APIs with authentication and rate-limiting; assisting in setting up their GNU/Linux machines and debugging various system-level issues; and security-hardening GNU/Linux systems. OVERVIEW I am an inquisitive software and hardware developer. My areas of interest, as of now, are custom hardware design, signal processing, professional audio, radio, electromagnetics, and aircraft control and navigation systems design. I love learning how things that I'm interested in work and then building them my own way, with my own rules. The non-client work that I do is always guided by this principle. My current experience lies in these domains: systems and hardware engineering; OS development; and setup, management, maintenance, and defense of GNU/Linux servers. My primary language is C (C99 for portability) for most code. For the most safety-critical applications, such as flight computers, navigation or radar systems, or radios, I use Ada (SPARK). HARDWARE For hardware design, when it comes to HDL, I use SystemVerilog, together with a board's native toolchain. Thus far, I've been working with Vivado and Quartus, then yosys and nextpnr for open boards. When it comes to PCBs, I use Altium (switched from KiCad) and PCB Toolkit in tandem, and am aiming to start using ANSYS soon. SIDE PROJECTS One of my current passion projects is a from-scratch compute platform (from the logic gates and PCB, through the bootloader, to userspace) that, on the software side, defines a non-POSIX kernel with userspace above it (the software side also works on the i386 and the AMD64) that I am writing in C99 in my free time. On the hardware side, the operating system is deployed across a set of four FPGAs, each using my custom 16-instruction processor architecture, which I call the "Minimal Instruction Set Computer," defined in Sail. The Sail architecture is used as a reference for the 32-bit processor, a.k.a. the "DANGLING Logic Unit," written in SystemVerilog. The individual FPGAs in the set have their specific roles. The master of the four is the "DANGLING Central Logic Unit." The DCLU has access to all of the three other units. Secure operations are handled by the "DANGLING Cryptographic Co-processor Unit." The DCCU is involved during each stage of the system's runtime. For expansion capability, there is the "DANGLING Peripheral Unit," whose role is interfacing with any external system that understands my custom serial protocol, EMIEMI. The idea of this compute platform started as a modular synthesizer, which means that audio is the centermost feature. Most resources go toward that stage. It is handled by the "DANGLING Sound Unit." Each processor has its own PSRAM, SDRAM, and NAND flash, except the DCCU, which is isolated to try to prevent leakage or intentional corruption of secure data. The DCCU is instead initialized by the DCLU and only communicates with and via the DCLU. Beyond that, on the side, I am currently building a custom flight management computer for a custom aircraft configuration, which is a project that I interweave with the custom OS/CPU project described above. GITHUB An overview of my personal, non-client work items can be found on my GitHub profile.

I'm an experienced 𝐌𝐚𝐜𝐡𝐢𝐧𝐞 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 and 𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐯𝐞 𝐀𝐈 specialist with a background in 𝐃𝐚𝐭𝐚 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 with extensive experience in designing and implementing end-to-end AI and ML solutions. My expertise spans various industries, and I've worked with multi-national teams to deliver innovative solutions. 🌎🏆 Are you looking to optimize your data engineering pipelines or leverage advanced machine learning for real-world impact? Need assistance in designing and deploying robust AI and ML solutions in your business environment? Let's connect and transform your ideas into actionable outcomes. 🔧💻✨ ✔️Core Services ✅ Generative AI and Large Language Models (LLMs)🤖 • Proficient in AutoGen and GPT-3.5-turbo for a range of generative AI applications, from code generation to task automation. • Experienced in creating multi-agent frameworks, conducting reinforcement learning with human feedback (RLHF), and integrating document processing and analysis with tools like ChatGPT and Langchain. • Skilled in designing complex workflows, implementing custom prompts, and exploring parameter-efficient fine-tuning techniques to optimize LLM performance. ✅ Machine Learning and Predictive Analytics📊 • Built ML models for sales forecasting, financial analysis, and other predictive tasks. • Strong background in PySpark and ML algorithms like Prophet and SARIMAX. • Used Google BigQuery, Google Dataproc, and Apache Airflow for orchestration in various projects. ✅ Data Engineering and ETL Pipelines 🔄 • Specialize in designing, optimizing, and migrating ETL pipelines using Azure Data Factory, Databricks, Google Cloud Platform (GCP), and more. • Extensive experience in large-scale data transformation and efficient data flow. ✅ Chatbot Development💬 • Design and deploy intelligent chatbots integrated with various data sources or APIs to enhance customer engagement and streamline business processes. ✅ Custom Python Scripting and APIs 🐍 •Develop custom Python scripts and APIs to interact with databases, AI models, and other software systems, enabling seamless automation and integration with existing workflows. 𝐔𝐧𝐢𝐪𝐮𝐞 𝐂𝐨𝐦𝐩𝐞𝐭𝐞𝐧𝐜𝐢𝐞𝐬: 𝐏𝐚𝐫𝐚𝐦𝐞𝐭𝐞𝐫-𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐭 𝐅𝐢𝐧𝐞-𝐓𝐮𝐧𝐢𝐧𝐠 (𝐏𝐄𝐅𝐓) ⚙: I have expertise in advanced LLM techniques, including fine-tuning, chain-of-thought prompting, and reinforcement learning with human feedback (RLHF). 𝐀𝐈-𝐁𝐚𝐬𝐞𝐝 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 ⚡: I can help you automate business processes and boost efficiency using AI and ML techniques. 𝐑𝐞𝐬𝐞𝐚𝐫𝐜𝐡, 𝐂𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 🔬: I offer expert guidance and hands-on development in AI and ML, focusing on delivering practical solutions to real-world challenges. 𝐋𝐞𝐭'𝐬 𝐂𝐨𝐧𝐧𝐞𝐜𝐭: 💡 If you're interested in exploring the potential of AI, data engineering, or machine learning for your business, I'd love to hear from you. Let's discuss your requirements and create tailored solutions to meet your unique needs. Together, we can drive innovation and transform your vision into reality. #MachineLearningEngineer #GenerativeAI #LLMDeveloper #ChatGPTExpert #AutoGen #Langchain #AIConsultant #OpenAI #NLPDeveloper #RLHF #FineTuningLLMs #FreelanceAI #RemoteMLJobs #HireMachineLearningEngineer #AIExpertForHire #FreelanceDataEngineer #RemoteAIProjects #HireLLMExpert #AvailableForFreelance #AIAutomation #AIForBusiness #FintechAI #AIInHealthcare #PredictiveAnalytics #RealEstateAI #SalesForecastingAI #CustomAIDevelopment #AIChatbots #AIInnovation #TechFreelancer #AIProject #PythonDeveloper #FreelancerLife #DataScience #ArtificialIntelligence #TechConsultant #NextGenAI #BuildWithAI

🌟 Introduction: Hi, I'm Rain Padjus, a Machine Learning Engineer from Tallinn, Estonia. 🔍 Core Skills: - Data Analysis & Visualization: Python, C/C++, Pandas, Matplotlib, Seaborn. - Machine Learning & AI: Scikit-learn, NumPy, PyTorch, Fastai, NLTK, RAGs, LLamaindex, Ollama, Local LLMs, Finetuning, LangChain. 🚀 Projects: - Smart RAG System Over Complex Files: (RAG, LLamaindex, Local LLMS, ollama) - OpenAI API with Voice Assistance on Call: (Python, ChatGPT API, VoIP API) - Vision Transformer Implementation: (GitHub dataset) - Text Parsing and Analysis Tool: (Streamlit, Langchain, OPENai API) - Data Analytics at Ericsson: Enhancing decision-making and process optimization. - E-Learning Platform Enhancement: Machine learning for user engagement. - Advanced Chatbot Development: NLP and AI integration. 📚 Education: - Bachelor’s in Computer Science, Peter the Great St. Petersburg Polytechnic University. - Continuous learning: NLP (Lena Voita), Practical DL (Fast.ai), Missed CS Semester (MIT). 💼 What I Offer: - In-depth data analysis, visualization, and preprocessing. - Deep learning model development and fine-tuning. - Predictive modeling and complex problem-solving algorithms. Looking forward to bringing my deep learning and AI expertise to your projects, turning data into actionable insights.

I help businesses build end-to-end AI products using modern LLMs/VLMs, from intelligent backend systems to clean, user-friendly web interfaces. My goal is simple: deliver reliable, production-ready AI solutions that behave predictably, scale well, and provide real business value, not fragile demos or experimental code. ━━━━━━━━━━━━━━━━━━━━━━ 𝗪𝗵𝗮𝘁 𝗜 𝗖𝗮𝗻 𝗕𝘂𝗶𝗹𝗱 𝗳𝗼𝗿 𝗬𝗼𝘂 • LLM chatbots & AI assistants with web interfaces • AI agents with tool-calling, memory, and multi-step workflows • RAG systems for document search, knowledge bases, and internal tools • AI automation tools to streamline business workflows • Speech-to-Text (STT) and Text-to-Speech (TTS) AI solutions • NLP solutions (classification, extraction, summarization) • Complete AI products: backend, frontend, and cloud deployment ━━━━━━━━━━━━━━━━━━━━━━ 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 • Clear system design focused on reliability and maintainability • Simple, clean frontend that real users can understand • Predictable timelines and transparent communication • Full ownership from idea → development → deployment ━━━━━━━━━━━━━━━━━━━━━━ 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 𝗔𝗜 & 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 • Python, FastAPI • LangChain, LangGraph • Hugging Face (models, inference, fine-tuning) • Open-source & API-based LLMs • Vector databases (Pinecone, Qdrant, FAISS, pgvector) • PostgreSQL, MongoDB, Redis 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 • TypeScript, React, Next.js, Tailwind CSS 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁 • Docker • AWS / GCP • Git & CI/CD ━━━━━━━━━━━━━━━━━━━━━━ 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 • Production-focused implementations • Clean APIs, stable and scale-able systems • Strong focus on business outcomes, not just AI features ━━━━━━━━━━━━━━━━━━━━━━ If you’re looking for someone who can build AI agents, voice-enabled systems, or LLM-powered features that actually work and ship cleanly, feel free to message me and tell me about your project.