🧩 Overview / Description I'm a software engineer with 3 years of professional experience in .NET (C#), Python, and SQL, building scalable and efficient backend solutions. Beyond development, I bring the mindset of a competitive programmer — writing optimized, maintainable, and clean code to solve complex real-world problems. Over the past few years, I’ve contributed to backend systems, fraud detection modules, and web applications across different stacks, combining analytical thinking with practical software design. ⚙️ Technical Expertise Languages: C#, Python, C++, SQL Backend: .NET, ASP.NET Core, REST APIs Frontend: React, JavaScript, HTML, CSS Database: SQL Server, MySQL Tools & Concepts: Git, OOP, Software Architecture, Debugging, UML Other: WPF, Shell scripting 🚀 What I Offer Backend development with clean architecture and maintainable code REST API design and integration Bug fixing, debugging, and performance optimization Algorithmic and logic-driven code implementation Collaboration on real-world web or desktop projects 🧠 Highlights Specialist on Codeforces & active LeetCode problem solver ACPC Finalist and TCPC Silver & Bronze Medalist Former Algorithm & Complexity Instructor at university level Experience mentoring developers to improve code quality and efficiency 💬 Let’s Work Together If you’re looking for a developer who writes code with both structure and insight, and can tackle tough problems with precision, I’d love to collaborate. Let’s turn your ideas into efficient, production-ready software.

Are your deployments slow, breaking at the worst moments, or costing more than they should? Is your team spending hours on manual releases instead of shipping features? If your CI/CD pipelines are fragile, your Azure infrastructure is growing out of control, or your DevOps processes exist only on paper, you are dealing with a problem that will not fix itself. I am a DevOps Engineer and Azure Architect with 10+ years of experience helping product teams and growing companies build cloud infrastructure that actually works. Whether it is a startup scaling fast or an enterprise team drowning in legacy pipelines, I come in, assess the real state of things, and build systems that are stable, automated, and cost-efficient. My primary expertise is Microsoft Azure and Azure DevOps, end to end. That means everything from designing multi-stage Azure DevOps pipelines and managing releases without downtime, to setting up Azure DevOps RBAC, securing environments, and integrating Azure DevOps with Kubernetes clusters running on AKS. I have built Azure DevOps workflows for teams of 5 and teams of 150, and the approach scales both ways. Every Azure DevOps implementation I deliver is built around real business goals, not just tooling checkboxes. Beyond Azure DevOps, I work across the full infrastructure stack. I design Cloud Architecture using Terraform for Infrastructure as Code, manage containerized workloads with Kubernetes and Docker, and implement Deployment Automation that removes human error from the release process. For data-heavy projects, I build pipelines with Azure Data Factory to handle ETL, orchestration, and integration between services. For teams building decentralized or blockchain-integrated solutions, I have worked with Azure Blockchain Service as part of broader Microsoft Azure infrastructure setups, combining it with the same security and governance standards applied across all environments. As an Azure Architect, I cover Cloud Computing governance, cost optimization, and FinOps practices, so your Azure bill reflects actual usage, not waste. I apply the same structured thinking to Network Security, Linux and Windows Server environments, and multi-cloud setups when needed. When projects require Amazon Web Services, I bring the same DevOps standards to AWS, including AWS DevOps pipelines, CI/CD automation, and infrastructure managed through Terraform. I also work with Google Cloud Platform for teams running workloads across multiple providers. AI Automation is a growing part of what I do. As more teams start integrating AI into their products and workflows, I help them connect those AI components to production infrastructure properly, with reliable pipelines, automated testing, and deployment flows that treat AI workloads the same way as any other service. I also collaborate closely with full stack developer teams to improve release processes, deployment reliability, and infrastructure scalability, making sure the gap between development and operations is as small as possible. What clients usually need help with: ✔ Stabilizing Azure DevOps pipelines and deployment workflows ✔ Building scalable Kubernetes infrastructure ✔ Migrating legacy infrastructure to Microsoft Azure ✔ Reducing cloud costs and improving DevOps efficiency ✔ Designing secure Cloud Architecture for growing products ✔ Automating deployments with Terraform and CI/CD ✔ Improving monitoring, security, and infrastructure reliability ✔ Implementing AI Automation into existing delivery workflows The full technology range I work with includes: Azure DevOps, Microsoft Azure, Amazon Web Services, Google Cloud Platform, Kubernetes, Docker, Terraform, Ansible, CI/CD, Git, SQL, Python, Linux, Windows Server, Azure Data Factory, Azure Blockchain Service, Cloud Architecture, Deployment Automation, Network Security, and more. Certifications: ✅ 8x Microsoft Azure Certified ✅ Kubernetes Certified ✅ Terraform Certified If your infrastructure needs structure, your pipelines need reliability, or your cloud costs are climbing without clear control, send me a message here on Upwork. Describe the situation and I will come back with a clear breakdown and concrete next steps.

Clients work with me when they need someone who understands both engineering depth and business impact and can design systems that scale, stay stable and reduce operational overhead. I’m a Solutions Architect, Data Engineer and Backend Developer with 14+ years of experience building scalable data platforms and production grade backend systems for Ecommerce, Fintech, SaaS and Healthcare companies. I help businesses solve complex data and backend problems by designing systems that are reliable, secure and built for real world scale. From data ingestion to APIs and cloud deployment, I focus on clean architecture, automation and long term maintainability rather than quick fixes. My core expertise covers end-to-end data pipelines, backend services and cloud infrastructure using Python, Java, SQL and modern cloud platforms. I design ETL workflows, APIs and distributed systems that handle high volume data, background processing and integrations with confidence. On the data side, I build automated pipelines that extract, clean, validate and deliver analytics-ready data to warehouses, dashboards and APIs. On the backend side, I design API first systems, microservices and integrations that power products reliably under load. What I work on: • Data Engineering & ETL Pipelines (Python, Pandas, PySpark, SQL) • Backend Development & APIs (Python, Java, FastAPI, Django, Flask) • Cloud Architecture & Deployments (AWS, GCP, Azure) • Data Warehousing & Analytics (Redshift, BigQuery, Snowflake) • Workflow Orchestration & Automation (Apache Airflow) • Web Scraping & Data Extraction (Scrapy, Selenium, APIs) • Distributed Systems, Async Processing & Messaging • Database Design & Performance Optimization • Docker, Kubernetes, CI/CD and production deployments If you’re looking for a senior engineer who can own data pipelines, backend architecture and cloud infrastructure end to end, let’s talk.

I am a seasoned Postgres database architect specializing in architecture for data-driven processes such as ERP's, CRM's, Fintech, etc. Chances are you are not using your database nearly to the capacity it can serve you and I can fix that. I am a systems design engineer first and foremost. Writing queries (with supreme excellence) is an art form, but still only secondary to the most important element: architecture which is where I excel the most. Beyond that, I'd say my "traditional" Postgres skills (listed below) are above average as well. Fair warning: I consider databases to be first-class citizens. I have developed a very successful workflow for producing good results. It begins with patiently asking questions to understand all of the contextual needs and then going about solving them in an iterative process with lots of two-way communication along the way. I utilize a loose framework and building workflow that makes it inherently easy to change and adapt as needed. This is important because good design is never achieved in the first iteration, so making architecture amenable means it can always get better. While I can obviously help with smaller projects, its the bigger challenges such as overhauls and ground-up projects that suit me best. I excel in complex cases and situations involving higher maths, algorithms and fuzzy logic. Traditional Skills: - ETL, Migrations, Imports - Advanced Functions/Procedures - Advanced/Complicated Query writing and optimization - Custom triggers, aggregates, types, etc. - User/role/security management - Indexing - Config tuning

With 23 years of software development experience, I have completed 80+ projects on Upwork with a Top Rated track record. My core stack is C# and .NET — from ASP.NET Core down to legacy .NET Framework 4.8 and ASP.NET Web Forms — paired with Angular and React on the frontend, and SQL Server on the backend. I also work with PostgreSQL and MySQL, using Entity Framework (both EF6 and EF Core) and Dapper depending on the project. Recent focus areas include: Azure & AI integration — Azure OpenAI features embedded into web and desktop applications, plus configuring Microsoft Copilot Studio for multi-agent orchestration and connecting AI agents to business data via Snowflake and MCP connectors. Performance & caching — Redis (including Azure Cache for Redis), T-SQL query plan and index tuning, for applications that need to stay fast under load. Payments & real-time communication — Stripe and PayPal integration, WebRTC for video features, and Twilio for SMS/voice. Healthcare software — I built and run a live medical e-directory platform (Angular/.NET), and spent 3 years at Prime Care Technologies, a U.S. healthcare technology company, so I'm comfortable working in HIPAA-regulated environments and handling protected health information. Desktop & on-prem deployment — WinForms/WPF applications, Windows services, and installers (WiX and Advanced Installer) for self-managed customer deployments. On the frontend I also work with Tailwind CSS, SASS/LESS, and modern build tooling (Webpack/NPM). I use Azure DevOps for source control, so changes are always revertible and progress is measurable. I follow consistent coding standards and document my work clearly so any developer who picks up the project after me can understand it. I work exclusively on hourly, pay-per-time engagements — happy to discuss your project in detail before we start, no obligation. Best regards, Srdjan Mladenovic

NOTE: I was Top Rated Plus with 100% job completion until my very last short job that didn't work out and She gave me 1 star...But please read all of my reviews to see my history. Hello, my name is Jay. I'm currently living in Tampa Bay, Florida. In 2018 I resigned from a long term, senior development position (10 years total. 9 of which were remote full time, and 1 year working in our Minneapolis office). I decided to move into freelancing and possibly freelance to permanent if I find the right opportunity. Beyond software development, my strengths are: Communication, Finding the Right Business Solutions & Delivering what the Customer and Users Expect. Since beginning software development, I've learned that consistent and clear communication is the main key to success in the completion of software projects. I've worked mostly in eCommerce, credit card processing, payment processing and hardware API integration, mobile Xamarin development, SQL Server programming & database design. Also, recently have completed a large Stripe integration. Most of my work, from a platform standpoint, has been in C#, VB.NET, ASP.NET Core, ASP.NET Web Forms, Blazor, Entity Framework Core & Xamarin. I've completed multiple large software projects on a freelance basis from the ground up. From specifications planning, programming & launching into production. The first of which led to my 10-year role at my previous job after the initial build was complete and in production. Please reach out to discuss your projects!

I architect and ship full-stack web applications that scale under pressure, comply by design, and evolve intelligently. With 12+ years building secure web platforms for Cisco, FedEx, and Cox Communications, I blend React, Node.js, .NET, and Azure with targeted AI integration, not for novelty, but to eliminate toil, harden quality, and accelerate time-to-value. Beyond traditional development, I engineer Python-based data pipelines and PowerBI visualizations that turn raw operational metrics into executive decision-making tools. My dual focus ensures your frontend is responsive, your backend is secure, and your data strategy is actionable from day one. AI coding tools (Cursor, Claude Code, Lovable) that accelerate scaffolding, debugging, and exploration, so you ship features, not boilerplate ✅ My Achievements @Built a React/Node.js IT automation suite used by 5,000+ employees, integrating AI-powered ServiceNow agents that auto-summarize incidents, lifting First Contact Resolution from 86% to 93% and cutting triage time by 40%. @Engineered a secure, zero-trust web platform on Azure (App Services, Key Vault, Managed Identities) that passed all security audits with zero findings while enabling daily production releases via GitHub Actions CI/CD with zero rollbacks. @Reduced onboarding from 4 weeks to 10 days for support engineers by delivering a full-stack training portal (React + Node + PostgreSQL), boosting certification pass rates by 40% and cutting repeat tickets by 25% through embedded semantic search. ✅ I treat AI as a force multiplier for web engineering: → LLMs that turn raw logs into actionable insights, so you fix root causes, not symptoms → Semantic search that transforms static knowledge bases into dynamic assistant experiences → Intelligent QA that prioritizes test coverage where risk is highest → AI coding tools (Cursor, Claude Code, Lovable) that accelerate scaffolding, debugging, and exploration, so you ship features, not boilerplate → Python-powered data pipelines feeding AI-enhanced PowerBI dashboards, as demonstrated in the xbyte analytics operations dashboard that analyzed 12K+ daily transactions to reduce cost per unit by 15% and improve forecasting accuracy by 30%. ✅ Technical Skills →Full Stack Development: [React, TypeScript, Next.js, HTML5/CSS3, Styled Components, Node.js, Express, .NET Core, C#, RESTful APIs, GraphQL, WebSockets, Serverless (Azure Functions) ] →Databases: [SQL Server, PostgreSQL, MongoDB, MySQL, Dapper, Redis] →Data Engineering & Visualization: [Python (Pandas, NumPy, ETL Automation), PowerBI (DAX, Power Query, Data Modeling), Semantic Search] →DevOps & Cloud: [Microsoft Azure (App Services, Functions, Key Vault), AWS (EC2, S3, Lambda), Docker, Terraform, Kubernetes (AKS), GitHub Actions, Azure DevOps, CI/CD, Infrastructure as Code (Bicep, ARM)] →AI Coding Tools: [Cursor, Claude Code, Lovable, GitHub Copilot, Make] →AI Integration: [AI Agent, OpenAI, GPT-4, Gemini, Deep Learning, AI Bot, LLM, LangChain, LangSmith, RAG, Zapier, MemGPT] →AI-Augmented QA: [Automated Test Orchestration, ServiceNow AI Analytics, Test Automation (Jest, Cypress, Selenium), SLA Compliance Monitoring] My foundation is robust web architecture: clean APIs, responsive UIs, infrastructure-as-code, and observability by default. AI sits on top, making it all smarter, not more complex. Let’s build a web application that’s secure, scalable, and quietly intelligent.

🏅 12+ Years 🏆 Top-Rated Plus 🏅 100% Job Success Score 💎 2000+ Hours I am Certified Microsoft Professional Full Stack Developer with over the past decade of extensive experience. My track record as a Full Stack developer extends not only to Microsoft technologies like Asp.NET, C#, .NET Core, Blazor, DNN, MS SQL, Azure, WCF, WPF, and MVC but also to a strong command of MERN (MongoDB, Express.js, React, Node.js) and MEAN (MongoDB, Express.js, Angular, Node.js) stacks. ✅ Microsoft Certifications: 1. Microsoft Certified: Azure Fundamentals (AZ-900, Number:- 9C8B1B-51EWD5) 2. Microsoft Certified: Developing Solutions for Microsoft Azure (AZ-204, Number :- 51B891-CADE37) I have been a trusted member of the Elance-Upwork community, consistently upholding a simple principle: 'Whatever job you do – do it the best way you can.' I am deeply committed to the quality of my work and reliability in delivering results. As a colleague and individual, I pride myself on being responsible, well-organized, innovative, communicative, a team player, loyal, and hardworking, qualities that are well-reflected in my Upwork reputation. You can verify the quality of my work by examining my profile statistics, which feature a Top Rated Plus badge and a Job Success Score of over 100%. I encourage you to take a look at the reviews I have received from previous clients. I am more than willing to offer my services, so please do not hesitate to contact me for an interview. I eagerly await your response. Let's connect and discuss your requirement. Thank you.

Salesforce AI Consultant specializing in Data Cloud, Agentic AI (Agentforce), Health Cloud, and CPQ. I help enterprises unify customer data, deploy autonomous AI agents, and streamline quote-to-cash, with 20+ Salesforce certifications and hands-on delivery across Sales, Service, and Health Cloud implementations. What I Deliver- * Data Cloud - ingestion, harmonization, identity resolution, Calculated Insights, Segmentation, Activation * Agentforce Life Sciences expertise with industry knowledge and AI capabilities * Agentic AI - Agentforce agent design, prompt, topic and action configuration, Einstein Copilot customization * Health Cloud - care plans, provider and patient data models, HIPAA-aware architecture * CPQ - product catalog, pricing rules, approval flows, quote-to-cash automation * Apex, LWC, Flow, REST and SOAP integrations, org migrations, AppExchange application development Certifications- * Salesforce Certified Administrator * Salesforce Certified Platform App Builder * Salesforce Certified Advanced Administrator * Salesforce Certified Sales Cloud Consultant * Salesforce Certified Service Cloud Consultant * Salesforce Certified Platform Developer I * Salesforce Certified Platform Developer II * Salesforce Certified Agentforce Life Sciences Consultant Highlights- * Converted JavaScript Button code from Salesforce Classic to Lightning Components * Salesforce Classic to Lightning Migration * Lightning Component and Lightning Web Component Development * Salesforce DX Implementation Salesforce Nonprofit- * Volunteers for Salesforce Sales Cloud- * Custom Territory Management Solution with Collaborative Forecasting * Proposal Management System with Conga Composer and DocuSign * Account, Opportunity, Lead, Contact and Campaign Management Service Cloud- * Open CTI * Live Agent * Service Cloud Console * Entitlement Management * Contract Management * Knowledge Management Marketing Cloud- * Lists and Data Extensions * Data Retention * Subscriber Key * Unsubscribe Management * Send Logs * Automation Studio * Contact Builder * Journey Builder * Marketing Cloud Connect * Dynamic Content * VAWP * AMPscript Commerce Cloud- * Front-end Development * Back-end Architecture * HTML, ISML, CSS, SCSS, SASS, Demandware, jQuery, JavaScript, AJAX, JSON, Gulp, XML Salesforce Integrations * Cloud storage and calendar integrations * Desktop and Online accounting system integrations * Route management integrations * Cloud object storage integrations * Salesforce Einstein * Enterprise content management integrations * Payment gateway integrations * Social media platform integrations * Content management system integrations * DocuSign and Conga Composer * PHP, Java, .NET and CMS integrations using SOAP APIs * MySQL middleware integrations * Chatter Files, Attachments and Content Version integrations for Partner Community users AppExchange Applications- * Custom AppExchange application development * Enterprise security and document management applications Experience Cloud- * Highly customized Customer and Partner Communities Additional Experience- * Field Service Lightning * Salesforce CPQ * FinancialForce Customization Pardot- * Salesforce and Pardot integration * Dynamic Lists * Automation Rules * Segmentation Rules * Drip Campaigns * Responsive Email Templates * Responsive Landing Pages * Form Handlers * Multi-step Forms * Engagement Studio * Code Tracking * Registration and Contact Forms * Cross-client compatible email development WordPress- * Plugin Development * Theme Development * PSD to HTML * SEO Optimization Full Stack * JavaScript * .NET * PHP * Ruby on Rails * Python * React Mobile App Development * Native iOS and Android applications integrated with Salesforce * Swift * HTML5 * Angular * Laravel * MySQL * React Native * Cross-platform applications using Node.js

I am a Business Intelligence Developer & Data Architect. I have over 30 years of experience building analytics dashboards, data warehouses and ETL pipeline solutions. These solutions include Profitability analytics, Finance reporting, Sales and Marketing analytics, Integrated dashboards for Saas Apps and many more. My team and I have built solutions for a wide range of businesses from Start-ups, through SMEs, to large International corporations (where our solutions help them analyse revenue of over 300 million USD a year). We have expertise in a wide range of technologies (some examples listed below). Whether what you need is a simple automated spreadsheet, a fully consolidated solution that pulls data from different systems (finance, sales, operations, internal) into a centralized data warehouse, reconciles and processes it into a single reliable golden source, allows different team members to self-serve always accurate, always up-to-date data that fits their specific need or you want to extend functionality of your cloud-based application to enrich the experience of your users, we have the expertise to build a solution for you that will deliver beyond your expectations. We are not just a purely technical team. I have many years of experience as a financial analyst. I often work with clients to define useful metrics/KPIs and interpret what they could mean for their business. Our goal is not just to give you a spreadsheet, database or dashboard, but to give you the insight that helps you to make your business better. Here are some benefits our solutions provide ==================================== ➡️ Clear and flexible dashboards and reports: ▪️ Summarised high-level reporting to give a clear overview ▪️ Flexible report structures that allow you to focus on areas of interest ▪️ Ability to drill into granular information to identify specific business drivers. ➡️ Optimised operating processes: ▪️ Reduce lag time in preparing reports. ▪️ Make reports available more quickly and more often. ▪️ Allow manpower to focus on analytics and decision making rather than data processing. ➡️ Increased confidence in data accuracy: ▪️ Automating data feeds between systems. ▪️ Automated reconciliations to highlight inconsistencies as soon as they happen and enable timely corrective action. ▪️ Leading to more assurance in the quality of the data you work with. ➡️ Others: ▪️ Consistent consolidated data across the business Some solutions we have built: ===================== ➡️ Finance Ledger analytics cube: When working with a multi-national bank I identified a consistent bottleneck in accessing necessary data across all their UK Finance reporting teams. To resolve this, I designed and developed an analytics tool which provided users with instant access to tens of millions of lines of transaction information summarised into an easy-to-use Excel interface. This involved building ETL pipelines from the accounting ledger system into an SQL database, I then processed the transaction data through an SSAS OLAP cube and the piped the results into a flexible Excel Pivot interface. This made it much faster and much easier for users to query the ledger and extract the information they needed. It allowed each user to easily create personalised sets of high-level or granular investigation reports. This single report was estimated to save over 100 man-hours of the reporting teams' time each month, a saving of over 550,000 GBP (approx. 750,000 USD) to date. ➡️ Customer Profitability System: This system loaded data from four different front-end business systems into a single data warehouse. It then performed reconciliations between the multiple systems and raised alerts if there were any inconsistencies. It then applied business rules to calculate various performance KPIs from the data. This system cut down the time taken by the month end reporting process from 5 days to under 2 hours. It also reduced PnL attribution errors from roughly 10% to under 0.05%. I then built a reporting interface that allowed the team to have access to improved analytics that showed high level trends and gave the ability to dig into the results and identify individual drivers behind those trends. We have accumulated expertise in a number of different technologies. Including: ▪️ Azure Data Factory / Azure SQL / MS Fabric ▪️ Google Cloud Platform ▪️ Power BI ▪️ Tableau ▪️ Looker Studio ▪️ SQL Server ▪️ MS Excel: (Formulas, VBA, Power Query, Pivots) ▪️ Google Sheets ▪️ Snowflake ▪️ Big Query ▪️ MS Azure ▪️ Python ▪️ AI Development ▪️ Xero ▪️ Quickbooks ▪️ Arthur Online ▪️ Deputy ▪️ SAP ▪️ Tradeport ▪️ Google Analytics (GA4) ▪️ Google Ads ▪️ Shopify ▪️ etc Thanks for taking the time to read my written introduction. I would love to hear more about your business and how we can help. Feel free to send me a message here on Upwork and I look forward to connecting with you.