Sr FullStack .Net Engineer

Designed and built scalable backend services using ASP.NET Core to power a financial data protection platform delivering tax and email notifications at scale, applying Clean Architecture and SOLID principles for long-term maintainability. Architected event-driven notification pipelines using Azure Service Bus, ensuring reliable, ordered, and fault-tolerant delivery of tax alerts and email notifications to end users — even under transient failures or downstream unavailability. Engineered idempotency and retry mechanisms for notification dispatch workflows, guaranteeing that duplicate messages or network failures never resulted in duplicate tax alerts or corrupted financial records. Optimized data access layers using Entity Framework Core, writing performant queries and migrations to handle financial datasets with accuracy and consistency across concurrent operations. Deployed Azure Functions for event-triggered, serverless processing of notification jobs — decoupling background workloads from core services and enabling elastic scaling without impacting primary system throughput. Designed and maintained RESTful API contracts in close collaboration with Product and Frontend teams, balancing delivery speed with scalability, versioning, and backward compatibility. Leveraged Claude Code as an AI-powered engineering assistant to accelerate backend development — applying structured task planning, model selection strategies, and MCP server integrations to streamline workflows and reduce cycle time across the development lifecycle. Mentored engineers on distributed systems patterns — idempotency, retry strategies, and eventual consistency — while actively contributing to architectural decisions and system reliability reviews.

Improved system stability by reducing issues in development and test environments through the implementation of new features, enhanced logging, debugging strategies, React components, and C# Web API enhancements. Designed and deployed Infrastructure as Code (IaC) using Azure Bicep to provision and manage environments, including development, staging, and production. Refactored C#, JavaScript, and TypeScript (TSX) codebases to align with industry best practices, eliminating code duplication and addressing SonarQube alerts. Repaired and optimized unit tests for React components using Jest, ensuring better test coverage and reliability. Managed and configured Azure resources via the Azure Portal and Azure CLI, maintaining multiple resource groups across different environments. Streamlined CI/CD processes by resolving deployment issues using AI tools, authoring and enhancing YAML pipelines in GitHub Actions, and leveraging GitHub Secrets for secure automation. Collaborated effectively with the Estonian team through clear, assertive communication and daily coordination in a Kanban-based agile workflow.

Architected Using Design Patterns: Utilized design patterns to structure the project architecture effectively, employing inheritance, interfaces, derived classes, enumerators, virtual methods, and abstract classes to create a robust and scalable application. Integrated Efsta API for Transactions: Successfully implemented Efsta API calls to handle transactions, including sales, voids, and returns. Ensured compliance with fiscal data requirements and managed diverse tax types and calculations for Austria, Portugal, and Spain. Managed and coordinated a team of six developers, ensuring smooth collaboration and efficient task allocation throughout the project lifecycle. Acted as the primary point of contact for technical support, offering guidance and troubleshooting assistance to team members at any project stage. Facilitated knowledge sharing by clearly explaining complex .NET ASP Web Forms concepts and implementation strategies to the team, ensuring a strong understanding of project requirements. Actively participated in client meetings, effectively communicating project progress, addressing client concerns, and incorporating feedback into the development process to meet client expectations.

Conducted detailed vulnerability assessments, resolving system vulnerabilities strategically. Enhanced user experience by integrating real-time hotel discounts based on booking data, boosting customer satisfaction. Led enhancements for the Flight Booking Web App, ensuring compliance with PCI-DSS standards for heightened security. Proactively resolved bug reports swiftly through comprehensive research, deep analysis, and cross-functional collaboration. Nurtured strong rapport with USA-based clients and the Dev team, ensuring effective communication and seamless collaboration through consistent face-to-face interactions.

Restructured a legacy project using OOP principles and key methodologies like SOLID, DRY, and YAGNI, improving scalability and maintainability. Enhanced the Credit Card Payments module for PCI-DSS compliance and a smooth transition to a new payment partner, boosting system security and efficiency. Played a vital role in reducing bug reports for Billing Health software by implementing OOP concepts and design patterns, and optimizing application performance. Maintained effective collaboration and communication between clients and team members in the USA through daily face-to-face communication, ensuring alignment with project goals and stakeholder expectations.

Unicredito—Sep 2018 - Jan 2020 Expedited Mobile App development for assessing bank credit eligibility from 2 months to an impressive 2 weeks. The app efficiently analyzes data for creditworthiness assessment. Attained a substantial 90% development time reduction for developers via an adaptable database schema, enhancing efficiency in CRUD operations and calculations with PL/SQL functions, procedures, triggers, and views, boosting productivity for other developers. Punto Union—Apr 2020 - Dec 2020 Significantly slashed transaction costs from 1 USD to a mere 0.2 USD per transaction by spearheading the development of a user-friendly Mobile App. This innovative app simplified day-to-day transactions for users, seamlessly integrating Web API and WCF services with third-party vendors to ensure a cost-effective and efficient transactional experience. Created scheduler jobs in Oracle Database, implementing Stored Procedures for closing cash and verifying pending payments automatically at the end of the day. UniMovil and UniNet—Jan 2021 - Sep 2021 Reduced B2B synchronization time from 3 days to 10 minutes via a Windows app, optimizing web service consumption and synchronization processes. Slashed transaction time in UniNet e-banking app from 1.5 hours to 5 minutes, enhancing user convenience for diverse payments across mobile and web platforms.

Systems Development Consultant Jan 2017 - Jun 2018 Enhanced vacation scheduling by 60% through active contribution to the Vacation Module, streamlining employee leave management. Implemented an innovative HR procedure reallocating vacation days based on seniority, eliminating manual reassignment tasks. Improved reporting functionality by implementing PDF Reports for Fixed Asset Delivery, enhancing documentation processes. Increased productivity by 45% with a streamlined Flow Management system for Viatical Application Approvals, reducing processing time. Systems Engineering Intern Sep 2016 - Dec 2016 Participated in the initial analysis for the Vacations Module (ER Diagram, Schema creation, and initial mock-ups).