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Andrés Borrelli, arquitecto de software con más de 40 años de experiencia.

Andrés E. Borrelli

Software Architect & Developer

Over forty years in the financial sector, with the last two decades dedicated to digital banking. Expertise in designing high-demand SOA and Microservices architectures, complemented by the development of high-performance frontends based on native web standards.

 www.linkedin.com/in/andresborrelli
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About me

With over 40 years in the financial sector, my career spans from Mainframe systems to modern Cloud architectures. I design solutions that balance innovation with the robustness and security required by mission-critical systems.

I specialize in Service-Oriented Architecture (SOA) and Microservices, focusing on the integration of Legacy cores and Cloud environments (AWS). My development philosophy prioritizes technical efficiency: I use native web standards (Vanilla JavaScript, HTML5, CSS3) to build high-performance interfaces, avoiding framework overhead when agility and low resource consumption are required.

I have also led IT Governance initiatives, designing institutional development methodologies and overseeing compliance control to ensure software lifecycles meet auditing and operational stability standards.

My current objective is to serve as a Consultant or Advisor, helping organizations manage complex technological modernization with the pragmatism of someone who has managed the core systems of major financial institutions.

Technical Skills

Architecture & Strategy

  • Systems Design: Service-Oriented Architecture (SOA) and Microservices.
  • IT Governance: Software Development Life Cycle (SDLC) and regulatory frameworks.
  • Interoperability: Integration of Legacy Core systems with modern platforms.
  • Modeling: Technical and functional design using UML.

Development & Languages

  • .NET Ecosystem: C# (.NET 8, Core, Framework), RESTful and SOAP APIs.
  • Native Frontend: Vanilla JavaScript (ES6+), Semantic HTML5, CSS3/SASS.
  • Modern Frontend: React.js for dynamic interfaces.
  • Core Systems: COBOL (CICS, AS/400), RPG/400.

Data & Infrastructure

  • Data Management: SQL Server, Oracle, PostgreSQL (AWS Aurora), DB2.
  • Cloud Computing: AWS (EC2, S3, IAM, CloudWatch).
  • Hybrid Environments: On-premise infrastructure integrated with Cloud.
  • Banking Cores: Technical expertise in COBIS, SIAF, Cyberbank.

Tools & Quality

  • Testing & Debugging: Postman, JMeter, SOAPUI.
  • Version Control: Git, GitHub, GitLab.
  • Methodologies: Waterfall (Tradicional) y adaptación a marcos Ágiles.
  • Security: API security schemes and granular access control implementation.

Professional Experience

Software Architect | Software Developer

Independent Consulting & Development

Buenos Aires, Argentina

2024 - Present

  • API Security: Research and prototyping of granular access control architectures for REST services on .NET 8, optimizing identity management.
  • Technical Standardization: Development of component libraries and base tools to accelerate development cycles and improve maintainability in .NET ecosystems.
  • Frontend Architecture: Design of modular interfaces based on Vanilla JavaScript, prioritizing the removal of external dependencies to maximize performance and reduce load times.

Senior Systems Analyst (Architecture)

Banco Macro S.A.

Buenos Aires, Argentina

2001 - 2024

  • Self-Service Channels: Technical lead for the service layer design and implementation for Diebold (Vynamic View) terminals over COBIS core, operating on hybrid cloud architectures (AWS / On-premise).
  • Digital Transformation: Lead architect for services on the new Home Banking (Technisys - Cyberbank) platform, ensuring seamless integration with core banking systems.
  • Post-Merger Integration: Design and development of the services backend for system unification following the Banco Bansud and Banco Macro merger.
  • Transactional Systems: Full Stack development of web applications for Third-Party Vendor Payments and Payroll systems.

Programming Manager / Project Leader

Banco Bansud S.A.

Buenos Aires, Argentina

1995 - 2001

  • IT Governance: Authored and deployed the institutional Systems Methodology, establishing the Software Development Life Cycle (SDLC) from feasibility studies to auditing.
  • Compliance Management: Founded and directed the Quality Control area, focused on technical and regulatory oversight of software deliverables.
  • Team Management: Coordinated internal development cells for the maintenance and evolution of core and departmental systems.

Programming Manager / Project Leader

Banco del Sud S.A.

Buenos Aires, Argentina

1993 - 1995

  • Customization, development, and implementation of the Customer module for the banking core (SIAF - AS/400).
  • Design and development of the change control tool for AS/400.

Head of Development

Serviplus Software House (Chase Manhattan Bank)

Buenos Aires, Argentina

1989 - 1992

  • Technical lead for the C&B Banking Core development for Chase Manhattan Bank on IBM AS/400 platform.
  • Supervision of evolutionary maintenance for financial entities including Lloyds Bank, Exprinter Cia. Financiera, and Banco Mariva (Mainframe, S/36, AS/400).

Previous Career (Central Systems)

1976 - 1991

Analysis and programming roles in Mainframe and traditional central systems environments.

  • Wells Fargo Bank N.A.: Banking application development in COBOL/RPG on IBM S/34.
  • Banco Oddone: Maintenance of financial applications on IBM architecture.
  • Banco Español del Río de la Plata: Programming of central systems in COBOL.

Contact

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