Hire the Best Perl Developers & Programmers

As a seasoned freelance programmer with a strong foundation in security and Unix systems, I bring a wealth of expertise to the realm of software development. With a passion for tackling complex challenges, I specialize in full-stack development, reverse engineering, and imparting knowledge through tutoring. Technical Proficiency: - Programming Languages: Proficient in a diverse range of languages including Python, Java, Ruby, Perl, C, JavaScript, and more! - Security Expertise: Extensive experience in identifying and mitigating security vulnerabilities. Adept at conducting penetration testing, threat modeling, and implementing robust security measures. - Unix Mastery: In-depth understanding of Unix-based systems, with a focus on Linux. Capable of optimizing system performance and ensuring the security and stability of Unix environments. Full Stack Development: - Frontend: Skilled in crafting responsive and user-friendly interfaces using HTML, CSS, and JavaScript frameworks such as React and Angular. Backend: Experienced in developing scalable server-side applications with proficiency in Node.js, Django, and Flask. Database Management: Proficient in designing and implementing databases using MySQL, PostgreSQL, and MongoDB. Reverse Engineering: - Binary Analysis: Expertise in reverse engineering and analyzing binaries to uncover vulnerabilities and enhance software security. Tutoring and Mentorship: - Educational Background: Possessing a comprehensive understanding of programming fundamentals, security concepts, and Unix systems, I am adept at conveying complex ideas in an accessible manner. - Mentorship: Committed to fostering the growth of aspiring developers through personalized guidance, code reviews, and hands-on mentorship. Additional Skills: - DevOps: Proficient in implementing CI/CD pipelines, containerization (Docker), and orchestration (Kubernetes) for streamlined development and deployment processes. - Networking: Knowledgeable in networking protocols, firewall configurations, and VPN setups to ensure robust and secure communication. - Cloud technologies: AWS, GCP, and Azure. Professional Approach: - Problem Solver: Known for my analytical mindset and creative problem-solving skills, I thrive in dynamic environments and excel at finding innovative solutions to intricate challenges. - Collaborative Team Player: Effective in cross-functional collaborations, I communicate technical concepts to both technical and non-technical stakeholders, fostering a cohesive and productive working atmosphere. With a commitment to continuous learning and a track record of delivering high-quality solutions, I am well-equipped to contribute to projects requiring a versatile and experienced freelance programmer with a focus on security and Unix environments.

Interested in Linux programming projects.

Senior dev with 20+ years in functional programming (F#, Haskell), systems (C), and modern stack (Python, Kafka). Based in GMT+7, I delivered high-quality async-friendly and ease-to-maintain solutions for fintech, data pipelines, and system programming. Let's solve you fun challenge together. - Improve Kafka ETL process from running 2 weeks in a few days.

I’m a senior backend and AWS cloud engineer with 18 years of experience building and operating high-volume, real-time systems in ad serving, analytics, and fraud/anomaly detection. Much of my career has been in small startups as the sole or lead engineer, responsible for architecture, production stability, and delivery. I specialize in troubleshooting and stabilizing production systems (performance, reliability, scaling), then improving or modernizing them. I’m comfortable diving into unfamiliar codebases, finding bottlenecks, and delivering practical fixes. Core stack: AWS (Auto Scaling, load balancing, routing/CDN, storage), Perl/Python/Node.js, MySQL, Redis/Valkey counters/rate limiting, APIs, CI/CD.

I have 12 years experience of developing web applications. I started my career as PHP developer dedicated to custom CMS development. My expertise is web programming with PHP (5, 7, OOP), Frameworks (Symfony, Laravel, Code Igniter), SQL, JavaScript, HTML5, CSS3, XML and related technologies like AJAX, JSON, JScript, jQuery, XSLT, XUL and WordPress. I am expert in: 🧰 HTML5/CSS3/JS/JQuery/AJAX/JSON 🧰 PHP/LAMP/WordPress 🧰 MySQL/PL-SQL/SQL/Mongo 🧰 Shopify/Liquid/Apps 🧰 Symfony/Laravel/Code Igniter/MVC Patters Testimonials on Upwork: 🎮 "Great problem solver quick and did the works as requested!" 🎮

Turning complex workflows, messy data, and repetitive tasks into reliable software that simply works. Programming since 2002, I build practical solutions around databases, web and desktop applications, data processing, APIs, automation, and AI integration. My approach is simple: understand the real problem first, then build the cleanest solution for it. Sometimes that means a PHP or C# backend. Sometimes it's a Python automation that replaces hours of manual work. Sometimes it's connecting APIs, processing thousands of records, scraping difficult data sources, controlling specialized hardware, or adding an AI layer that lets users work with their own documents and data. And sometimes the best solution is a combination of all of them. What I can help you with: - Backend development with PHP, C#/.NET and Python - REST API development and third-party integrations - MSSQL and MySQL database development - Full-stack and custom web applications - Automation and scripting - Web scraping, parsing and data extraction - Data cleaning, transformation and processing - Scheduled jobs and business workflow automation - Windows and Electron desktop applications - WordPress development and plugins - Rapid prototyping and proof-of-concept development for web, desktop, automation, API, AI, and hardware-integrated solutions. - Industrial automation software, EZCAD3 SDK integration, and custom laser-control systems AI & OpenAI Integration I build practical AI integrations, not AI for the sake of a buzzword. I can integrate the OpenAI API into new or existing applications, including solutions using the Responses API, vector stores, document search, knowledge-base workflows, AI-assisted data processing, and custom backend automation. I also work with Codex CLI and Cursor CLI, including Docker-based environments and automated development workflows. This is useful when you want AI to become part of an existing development or business process instead of replacing everything around it. Data Scraping & Processing Need data that isn't available through an API? I have extensive experience with web scraping, parsing, extraction, data cleanup, transformation, large dataset processing, database imports/exports, and automated collection pipelines. The goal is not just to collect data. The goal is to deliver structured, usable information that can immediately become part of your workflow. Desktop, Electron & Industrial Integration I have a long background in Windows and desktop development, including C#, Visual Basic .NET, VBA, Office Add-Ins, Classic ASP and VB6. For modern desktop projects, I can also work with Electron when a JavaScript-based desktop application is a better fit. For specialized industrial projects, I can work with the EZCAD3 SDK to integrate laser marking and control functionality into custom software and automation workflows. Modernizing an old system does not always mean throwing it away. Sometimes the smarter solution is to extend it, connect it to newer services, automate the painful parts, and keep the parts that already work. How I Work I don't like disappearing into a project and returning with something completely different from what the client expected. Good development requires good communication. You can expect clear communication, realistic expectations, reliable delivery, fast problem identification, practical technical recommendations, and attention to detail. If something is unclear, I ask. If I see a better approach, I explain it. If I spot a problem that could become expensive later, I bring it up early. My goal is not just to complete a task. It's to leave you with something reliable that makes your work easier. About Me I'm also a certified railway engineer, and that engineering background strongly influences the way I approach software: understand the system, understand what can fail, remove unnecessary complexity, and build something dependable. I'm a Microsoft Certified Professional (MCP) and work with C#, .NET, PHP, Python, JavaScript, SQL, MySQL, MSSQL, Visual Basic, VBA, WordPress, APIs, automation, data processing and related technologies. I'm based in Serbia and speak English and Serbian. Vietnamese language assistance is also available when required. My normal availability is 9 AM-6 PM Central European time, and I regularly work with clients across different time zones. If you have a difficult technical problem, a repetitive process that should have been automated years ago, an API that refuses to cooperate, thousands of records that need processing, specialized hardware that needs software integration, or an idea that needs to become working software, send me a message. There is usually a way to make it simpler.