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Velja R.

Pancevo, Serbia

$40/hr
5.0
2 jobs

Senior .NET Engineer | Industrial Automation • SCADA • Energy Systems • Email Security I help companies rescue, stabilize, and extend complex .NET systems — especially in industrial automation, energy, secure communications, and long-lived desktop applications. For 20+ years I’ve been taking over products that are abandoned, undocumented, or mission-critical and making them stable, maintainable, and ready for real users. If you have software that “mostly works” but needs fixes, upgrades, or new features, I am likely the person who can get it moving forward again. What I’ve built and maintained: Industrial automation & telemetry platforms Wind turbine OPC data collectors, Modbus integrations, SCADA-style monitoring, custom energy dashboards. Energy reporting & forecasting systems Load planning, power demand control, production forecasting, trend visualization, utility reporting. Secure communication and email applications OpenPGP encryption for Outlook, email parsing libraries (PST/OST/MBOX), large-file transfer systems. Enterprise and engineering desktop tools DevExpress WinForms applications, legacy .NET Framework products, system configuration software (IEC-style engineering tools). Strengths and approach: 1. Take over legacy systems nobody wants to touch 2. Read existing code quickly and identify risks & priorities 3. Design clean, maintainable architecture for long-term support 4. Implement features that “just work” and improve reliability 5. Communicate clearly with non-technical stakeholders I’m comfortable with industrial protocols, low-level device communication, and environments where reliability matters: Modbus RTU/ASCII/TCP Industrial IoT data acquisition Windows Services for scheduled/preventive jobs SQL Server, PostgreSQL, and MySQL backends DevExpress WinForms applications Typical client needs I solve: “We have a working .NET application but no active developer.” “We need bug fixes, feature updates, and long-term maintenance.” “We must integrate with industrial hardware or field devices.” “We need to restore stability and prepare the product for release.” “We need secure email or data handling components.” Tech stack: Backend: .NET Core, ASP.NET Core, .NET Framework, C#, Windows Services Frontend: Angular, TypeScript, JavaScript Desktop: WinForms, DevExpress, MVVM Data: SQL Server, MySQL, PostgreSQL Other: Encryption, OpenPGP, legacy rescue, prototyping, product stabilization If you need a senior developer who understands industrial realities, existing product risks, and business deadlines, let’s talk. I deliver production-ready code and long-term stability, not experiments.

  • .NET Core
  • .NET Framework
  • C#
  • Windows Forms
  • Microsoft SQL Server
  • Industrial Automation
  • SCADA
  • Modbus
  • Encryption
  • Email Security
  • ASP.NET Core
  • Angular
  • DevExpress
  • Industrial Internet of Things
  • Energy Management
Miroslav S.

Nis, Serbia

$17/hr
5.0
3 jobs

Senior Full-Stack .NET Developer with 5+ years of experience building scalable web applications, robust APIs, and modern database architectures. My core stack includes C#, .NET Core, SQL Server, and TypeScript/Angular, alongside legacy support in VB.NET. I leverage advanced AI coding workflows to deliver high-quality, maintainable code faster, optimize complex queries, and accelerate overall project execution. Core Skills & Focus: Backend & APIs: C#, .NET, Web APIs, Entity Framework, MSSQL Frontend: Angular, TypeScript, JavaScript Efficiency & Practices: AI-assisted development, clean architecture, Git, automated testing Whether you need end-to-end web application development, legacy code refactoring, or performance optimization, I provide reliable, independent solutions tailored to your business goals. Let's discuss your project!

  • .NET Core
  • ASP.NET Web API
  • ASP.NET MVC
  • C#
  • HTML
  • JavaScript
  • AngularJS
  • SQL
  • Angular
  • CSS
  • jQuery
  • Desktop Application
  • RESTful API
  • Windows App Development
  • Azure DevOps
Alexey V.

Belgrade, Serbia

$50/hr
5.0
3 jobs

𝐍𝐞𝐞𝐝 𝐚 𝐒𝐚𝐚𝐒 𝐩𝐫𝐨𝐝𝐮𝐜𝐭 𝐛𝐮𝐢𝐥𝐭 𝐨𝐫 𝐚𝐧 𝐌𝐕𝐏 𝐬𝐡𝐢𝐩𝐩𝐞𝐝 𝐟𝐚𝐬𝐭 𝐰𝐢𝐭𝐡𝐨𝐮𝐭 𝐟𝐚𝐥𝐥𝐢𝐧𝐠 𝐚𝐩𝐚𝐫𝐭 𝐚𝐭 𝐬𝐜𝐚𝐥𝐞? That's what I do. I'm a full-stack developer and solution architect with 15+ years building SaaS platforms end to end, from MVP to production systems serving hundreds of thousands of daily users. Whether you're validating an idea with an MVP or scaling an existing SaaS product, you get one senior engineer accountable for the outcome. I'm also part of Bela Supernova, a full-cycle software development company with 50+ engineers serving enterprise clients across EMEA since 2013. You get a senior developer working hands-on on your project, backed by a complete team: full-stack, AI/ML, DevOps and data engineers - so you can scale from one developer to a full delivery unit without changing your point of contact. What I build: 🔷 SaaS Platform Development - multi-tenant SaaS products, customer-facing apps and internal admin dashboards, subscriptions, role-based access, reporting. Built one serving 𝟐𝟎𝟎𝐊+ 𝐝𝐚𝐢𝐥𝐲 𝐮𝐬𝐞𝐫𝐬 𝐚𝐜𝐫𝐨𝐬𝐬 𝟐𝟎+ 𝐜𝐨𝐧𝐟𝐢𝐠𝐮𝐫𝐞𝐝 𝐞𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭𝐬 𝐢𝐧 𝟏𝟐 𝐜𝐨𝐮𝐧𝐭𝐫𝐢𝐞𝐬. 🔷 MVP Development - fast, focused MVPs that prove the idea and don't need rewriting six months later. I ship a working slice first, then harden it - architecture that survives the transition from MVP to real product. 🔷 AI & LLM Features - AI built into SaaS products as a core differentiator, not a bolted-on chatbot: LLM assistants, semantic search, embeddings, automated workflows with guardrails and cost control. Architected an AI platform running at 𝟏𝟐𝐌+ 𝐝𝐚𝐢𝐥𝐲 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐬. 🔷 Magento / Adobe Commerce - custom modules, ERP and payment integrations, migrations, performance tuning on high-traffic stores for real merchants. 🔷 Solution Architecture - system design, technical discovery, realistic estimates for complex, business-critical applications. 🔷 Legacy Rescue & Modernization - inherited codebases, half-built products, projects abandoned by the last developer. I reverse-engineer what's there, decide what to keep versus rebuild, and get it to production. My background spans Telco, Utilities, Social Insurance and Government - high-stakes environments where software is mission-critical and code has to stay reliable, secure and maintainable for years. That's the standard I bring to SaaS work, whether it's a first MVP or a platform at scale. 𝐓𝐞𝐜𝐡 𝐈 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: Python, JavaScript, TypeScript, Node.js, React, Next.js, FastAPI, Java, C#, Go, PHP, Magento 2, PostgreSQL, MySQL, Redis, Elasticsearch, REST API, GraphQL, microservices, Docker, Kubernetes, AWS, GCP, OpenAI API, LLM, machine learning, SaaS, MVP. 𝐈𝐟 𝐲𝐨𝐮𝐫 𝐒𝐚𝐚𝐒 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐢𝐬 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥𝐥𝐲 𝐜𝐨𝐦𝐩𝐥𝐞𝐱, 𝐛𝐞𝐡𝐢𝐧𝐝 𝐬𝐜𝐡𝐞𝐝𝐮𝐥𝐞, 𝐨𝐫 𝐬𝐭𝐮𝐜𝐤 - 𝐭𝐡𝐚𝐭'𝐬 𝐞𝐱𝐚𝐜𝐭𝐥𝐲 𝐰𝐡𝐞𝐫𝐞 𝐈 𝐝𝐨 𝐦𝐲 𝐛𝐞𝐬𝐭 𝐰𝐨𝐫𝐤. Send me a message and let's talk!

  • React
  • Full-Stack Development
  • SaaS Development
  • Web Development
  • JavaScript
  • TypeScript
  • Python
  • Node.js
  • Next.js
  • API Integration
  • Machine Learning
  • C#
  • Golang
  • Java
  • PHP
  • DevOps
  • PostgreSQL
  • Software Architecture
  • Magento
Miloš Z.

Zabalj, Serbia

$40/hr
5.0
5 jobs

Looking for a reliable partner to build your project or maintain existing systems? I work efficiently, respect your time, and deliver scalable, maintainable solutions with clear, transparent updates throughout every step of the process. Services I provide: • Full-Stack Development - Building robust web applications with React and .NET Core. • API Integration - Designing and integrating RESTful APIs • Cloud Solutions - Deploying and managing web applications on Azure using Docker. • Maintenance & Support - Ongoing maintenance, troubleshooting, and updates for your applications. • Consulting - Guidance on system architecture, optimization, and long-term development strategies. Problems I solve: • Budget Control - I keep your project within budget by focusing on clear, goal-driven progress. • Missed deadlines - I deliver projects efficiently, respecting your deadlines, without sacrificing quality. • Unclear Requirements - I help you to clarify project goals, ensuring we build the right thing you need. • Scalability Issues - I develop scalable solutions that last and grow with your business. • Clear Communication - I offer regular updates with full transparency on progress and deliverables. • Reliability - I’m committed to being a reliable partner, ready to assist whenever needed. About me: Hi, I’m Miloš, a full-stack developer from Serbia specializing in React and .NET Core. I’ve worked on a wide range of projects, from small-scale MVPs to complex enterprise-grade systems. I enjoy working closely with clients, figuring out exactly what they need, and delivering results that fit their vision. If you need someone who can build, improve, or maintain your software, feel free to reach out. I’d be happy to discuss how I can help you.

  • .NET Core
  • .NET Framework
  • Angular
  • C#
  • Full-Stack Development
  • Entity Framework
  • Microsoft Azure
  • Azure App Service
  • Microsoft SQL Server
  • Docker
  • Angular Material
  • AngularJS
  • TypeScript
  • JavaScript
  • React
Nikola Z.

Belgrade, Serbia

$25/hr
5.0
2 jobs

Motivated software developer dedicated to self-improvement. My analytical approach and psychological background make me eager to find common ground and clear understanding with a client. I aspire to stay abreast of trends in new technologies and the industry. I enjoy acquiring new knowledge and applying it to create efficient software solutions. So far worked on Large enterprise apps or small websites. I mainly use .NET stack -SQL server with Dapper or EF core -MVC or API ASP.NET application -Blazor or sometimes Angular or React as a frontend I value clear and regular communication so please let's keep in touch. My best Nick

  • .NET Core
  • .NET Framework
  • .NET Stack
  • ASP.NET
  • ASP.NET Web API
  • ASP.NET MVC
  • C#
  • Transact-SQL
  • Entity Framework
  • Agile Software Development
  • Blazor
  • JavaScript
  • RESTful API
  • Docker
  • Stored Procedure Development
Igor B.

Novi Sad, Serbia

$45/hr
5.0
4 jobs

- 8+ years of experience in C++, C# - Windows services, Desktop app development - Expertise in RPC, SOCI, SQLite, MySQL, Postgres - Skilled in multithreading, IPC, and performance optimization - Development of scalable backend services and distributed systems - Proficient in CMake - Strong debugging skills with GDB, Valgrind - Unit & integration testing using GTest - Experience in industrial automation, including .NET-based systems communicating with PLCs, OPC servers, and ERP environments, as well as serialization/aggregation solutions for packaging lines - Industrial automation (PLC, OPC UA, MQTT)

  • .NET Core
  • Automation
  • Automotive
  • Fortran
  • C++
  • Appium
  • C#
  • Linux
  • Git
  • Energy & Utilities
  • Desktop Application
  • SQLite
  • MySQL
  • PostgreSQL
  • Power Systems Engineering
  • Arduino
  • MQTT

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