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I build software that works — from low-level C++ systems to cloud-native SaaS platforms to full-stack web applications. With 20+ years spanning system programming, solution architecture, DevOps, and full-stack development, I bring senior-level judgment to every layer of a project. My edge is rare: I think at the architecture level and write production code. Having worn the hats of Product Owner and CTO earlier in my career, I bring business and product thinking to every technical decision — without losing sight of the code. What I do for clients: Whether you need an architect to design or audit a system, a full-stack developer to ship something end-to-end, or a senior pair of eyes on your codebase — I can own it. I also take on code and architecture review engagements: auditing codebases, identifying risks, and delivering actionable improvement plans. I work solo or integrate with your team. Selected projects: - D-ID — co-developed and continue to support the D-ID Studio mobile app (React Native) and built plugins for Microsoft PowerPoint and Canva, bringing D-ID's AI video generation into the tools people already use - AI integrations — integrated OpenAI, Gemini, and AWS Bedrock APIs into client products - License plate recognition system — inherited a C++ prototype built on custom ML models and took it to production: audited the codebase, produced a detailed remediation plan, and executed it. Client feedback: "one of the absolute best freelancers I've worked with in years" - Bitlevex — sole architect and full-stack developer for a cryptocurrency options trading platform; owned the entire technical stack from architecture to deployment on Google Cloud, Kubernetes, Java/Spring Boot, Node.js, React.js - Veset Nimbus — cloud playout SaaS for linear TV channels; led architecture and development, acted as Scrum Product Owner; hands-on C++ work using GStreamer What clients say: "Vlad was a C++ ninja that jumped right into our project, laid out a detailed, thoughtful, well-reasoned list of items that needed to be re-worked before release, and then executed in a methodical and deliberate way. His code is well-documented, well tested, and a thing of beauty. Vlad is truly a senior developer that would be a tremendous asset to any team." "Vlad brings honest, unbiased opinions about your codebase and sensible, well-reasoned solutions to improve it. His contributions are always based on industry best-practices. What's more, he brings his vast management experience to every decision — so there's a comprehensive understanding of the implications of each choice. A trusted guide and partner." Core stack: C++ · Java (Spring Boot) · TypeScript · Node.js · React.js · Python · AWS (incl. Bedrock & serverless) · Google Cloud · Kubernetes · Docker · WebSockets · OpenAI API · Gemini API I hold Upwork's Expert-Vetted badge — awarded to the top 1% of talent on the platform. If your project needs someone who can think at the architecture level and still write production code, let's talk.

Java developer with 5+ years of experience. My experience include programming for back-end, front-end, development of interactive web, mobile and desktop applications. My skill set includes: Backend Technologies: ✓ Java: Java 15, JavaEE, JavaFX, Swing ✓ Spring: Spring Webflux, Spring MVC, Spring Security, Hibernate ✓ Cloud: Docker, Kubernetes, Docker, Spring Cloud ✓ API integrations: REST, SOAP, WebServices, WebSockets ✓ Databases: Postgres, MySQL, MSSQL, Oracle, MongoDB, Redis ✓ Authentication: OAuth, JWT Servers and Tools: ✓ Tomcat, Apache, Netty, Jetty. ✓ GIT, BitBucket, Maven, Gradle ✓ Trello, Jira ✓ Swagger, Postman Front End Technlogies: ✓ JavaScript, TypeScript ✓ Angular, jQuery, Bootstrap ✓ HTML 5, CSS, SCSS ✓ JSP, Thymeleaf Android: ✓ RxJava, Dagger ✓ ButterKnife, EventBus ✓ Room, SQLite ✓ Background Services, Retrofit

I'm a developer of automated trading systems with a focus on machine learning and quantitative trading. I create high-performance solutions for algorithmic trading in cryptocurrency markets — from arbitrage strategies to sophisticated ML models. My approach combines deep technical expertise, mathematical background, and practical market understanding. I work on projects that require not just "writing a bot," but building comprehensive systems with optimized performance and real results. Core Skills: Trading Bot Development: - Market makers and liquidity providers - Arbitrage bots (cross-exchange arbitrage, DEX/CEX) - Sniper bots and high-frequency trading (HFT) - Current specialization: Hyperliquid Machine Learning and Data Analysis: - XGBoost with Optuna optimization - Neural networks, including transformer architectures - Multi-objective optimization of trading strategies - Technical analysis and custom indicator development Technology Stack: - Languages: Python (primary), Rust, Solidity, JavaScript - Platforms: DEX (Uniswap, etc.), CEX, specialization in Hyperliquid - Infrastructure: from bare metal to Kubernetes, optimization for high loads - AI tools: actively use Claude Code to accelerate development - OS: Ubuntu 24 (preferred), Linux, Mac, Windows, Android, iOS Infrastructure and DevOps: - Full server lifecycle: from bare metal installation to Kubernetes orchestration - Performance optimization for high-load systems - Experience with powerful hardware and distributed computing Who I Work With: My clients are professional traders, crypto funds, and companies seeking not ready-made templates, but custom solutions with real competitive advantages. If you need a complex trading strategy with machine learning or a high-performance bot for specific requirements — I'm ready to discuss your project. What I Offer: - Comprehensive development from concept to production deployment - Transparent communication and technical expertise at every stage - Solutions focused on results and performance - Post-launch support and optimization Ready to discuss your project and propose the optimal solution for your goals.

I build AI agents that automate outreach, response handling, and internal workflows. 12 years of backend engineering (Python, Rust) + production AI agent systems. 100% Job Success Score on 12+ contracts. Real numbers from real projects: • Crawled 700M+ domains in a single distributed pipeline (DNS, WHOIS, screenshots, tech-stack fingerprinting, email extraction) — 43 TB of data across 12 servers • Scraped the 3 largest UK real-estate directories into a 4.3 TB schema: listings, image archives, historical sales • Cut a Django hot-path endpoint from 15.5 s → 19 ms (~815× faster) • Drove cost-per-GB on a B2B mobile-proxy product down by 20× • Currently shipping ~90 merged MRs at a Series-A SaaS — Django + Rust (PyO3) + Kubernetes + Triton ML serving What I deliver: ▸ Full source code and instructions to run the code. Upkeep, hosting, maintenance (or instructions on them). ▸ Backend & APIs — Django, DRF, FastAPI, Flask, Celery. REST APIs that power dashboards, mobile apps, or internal tools. Postgres, MongoDB, Redis, ClickHouse. ▸ Performance & rescue work — optimized endpoints, fast Celery queues, SQL speedup and more.. I eliminate the bottleneck before it appears. ▸ Full-stack when needed — Vue.js, React, TypeScript on top of the APIs I build. Stripe integrations, OAuth, webhooks. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ Why clients like me? (no idea) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • 100% Job Success across every contract — no walk-aways, no drama • Long-term clients (multi-year engagements, not one-shot gigs) • I write a plan before I write code, and I tell you when something is a bad idea — even when you're paying me to do it • Async, reliable communication. I deliver in writing, not in vibes. What I won't do: spam, ad fraud, DDoS, scraping with intent to violate ToS where it actually matters, or anything that puts your business at legal risk. Web scraping is legal when done right — I do it right. If you've got a backend that's buckling, a scraper that broke last week, or a data-extraction project nobody else wants to take on — send the details and I'll tell you straight whether I'm the right fit. — Arthur

Expertise in Web-Development, Odoo and DevOps services to help you take your business to the next level. I am a highly skilled software developer and DevOps engineer with several years of experience in Python development, Odoo development, and providing DevOps services. My expertise in Python enables me to provide custom software development services that are tailored to the specific needs of my clients. Whether you are looking for web development, data science, or machine learning solutions, I can help. Additionally, I also specialize in Odoo development, which allows me to create custom business applications that are built using the Odoo framework. This open-source ERP software can be used to manage different aspects of a business, such as accounting, inventory, sales, and customer management. Furthermore, with my DevOps knowledge, I am able to streamline the delivery of software applications and services, providing activities such as continuous integration, continuous delivery, and automation. I have a proven track record of delivering high-quality software solutions that meet the needs and goals of my clients, and I pride myself on my ability to work closely with my clients to understand their unique needs and deliver software solutions that exceed their expectations. If you are looking for a reliable and experienced developer to help you take your business to the next level, look no further. Contact me today to discuss your project and learn more about how I can help you achieve your objectives. - Python development - Web development using frameworks such as Django and Flask - Data science and machine learning using libraries such as NumPy, SciPy, and scikit-learn - Web scraping using BeautifulSoup and Scrapy - Object-oriented programming and design patterns - Git, SVN, and version control - Linux and Windows administration - Odoo development - Customization and integration of Odoo modules - Customization of Odoo views and workflows - Odoo reporting and BI - DevOps - Cloud infrastructure design and deployment - Configuration management using Ansible, Puppet, or Chef - Continuous integration and continuous delivery using tools such as Jenkins, GitlabCI, Github Actions and other - Containerization using Docker and Kubernetes - Automated testing - Performance monitoring and troubleshooting - Cloud providers like AWS, Google Cloud and Azure

C++/Python Developer | Computer Vision Systems | ML&AI | osX - win64 - unix | Hi dear client! I main in C++ development, however over last 7 years in active development I have accumulated a diverse skillset: - Computer vision applications [on edge, on cloud, classic, deep learning] - Application development [backend, CI/CD, pipelines, complex builds, delivery, Qt, PyQt] - Architecture design [AWS, GCP, API's, custom authentication, cloud-native] - Optimisation [multi-threaded software, CUDA, inference optimisation ] These skills were developed when I had to tackle various challenges, including: - Packaging PyInstaller executables as a part of application with code protection with delivery to end-users for macOS, Windows, and Linux platforms (expert) - Developing and delivering dockerized C++ high performance computer vision inference applications with deployment in Kubernetes and on various AWS resources with target precision of 99.99%+ accuracy and 99.99%+ uptime in high-risk environments (expert) - Training and specialising various flavours of computer-vision models on vast datasets of up-to 1 million images - Developing and deploying custom stripe backend integrations handling custom authentication and one-click checkout system for digital assets (intermediate) - Developing and delivering a multiplatform audio player solution in low-level C++ utilising adaptive audio file streaming decoding, handling all known audio formats and optimising load-to-playback time to less than 10 msec for any type of compressed file (intermediate) - Taking applications from POC to commercial market by developing CI/CD, organising user testing, constructing and executing development strategies, optimising operation costs and defining software stacks. (intermediate) - Working on my passion projects discovering algorithmic trading and cryptocurrency markets. (beginner) Working with me you can expect: Excellent communication [ENGLISH: Proficient | LATVIAN: Bilingual | RUSSIAN | Native ] Meeting your deadlines Clear code and documentation Strict work ethic Creative solutions to difficult problems Attention to details Flexibility & Reliability My passions are technology, learning, mathematics, natural sciences and science of human consciousness. I will happily accept any research projects, that will make me go deep into the topic for several months, even if the topic is completely new for me. I enjoy both low-level programming in C/C++, as well as high-level Python and JS, and I will jump at everything in between with curious enthusiasm. I am highly business oriented in my work. I write code that is understandable, extensible, and reliable. In my free time I enjoy racing, horse-riding and playing musical instruments. If your project does not exactly match my skillset, I will happily accept a lower rate if you still consider me. By being a quick learner and a reliable person with strict work ethics and strong knowledge base, I have delivered many projects where I had to learn along the way. Freelancing gives me a chance to be exposed to many different projects, current technologies and worldwide clients, with many different ideas and expectations. This helps me grow as a developer and as a professional. I enjoy working with different people, helping them to bring their ideas to life. My proficiencies: OS's: Linux, Windows, MacOS Programming language knowledge: C / C++: 7 yrs Python: 5 yrs QML / HTML / CSS / JS: 2 years Cloud: AWS, GCP, Digitalocean CI/CD: Jenkins, GitHub pipelines Orchestration: Docker, Kubernetes ML/AI: CUDA/TensorRT, PyTorch, tensorflow/Keras DL Inference: on-edge, cloud Additional skills: Git, Jira, Kanban Due to my previous expirience and jobs, I also have practice and knowledge of Graphic Design, Video Editing and Encoding, VFX, and Music Production. I also have great interest in Web3 technologies, Cryptocurrencies, Metaverse development, Automotive design, Robotics, and Biochemistry, with goals to apply my development skills to my interests.