William Nieva Gutiérrez

Banco BCI · BCI Corredora de Bolsa (brokerage)

I am the technical lead for integrations in the migration from the legacy SIGA/RMI system to the Calypso platform.

• Designed and implemented a dual SIGA/Calypso architecture using feature flags and the Router pattern, so both systems run side by side and can be switched over with zero downtime.
• Defined contracts and conversion layers to a canonical DTO, aligning the Calypso orchestrator responses with existing contracts and avoiding cascading rewrites downstream.
• Build microservices in Java 11 and Spring Boot with reactive programming (WebFlux / WebClient) and Gradle.
• Standardized HTTP client configuration: per-environment TLS and truststore settings, fail-fast startup checks and environment-specific security policies.
• Run services on Azure Kubernetes Service and consume services on OpenShift, troubleshooting with kubectl and Telepresence.
• Manage GitHub Actions CI/CD pipelines with SonarQube quality gates, JaCoCo coverage, Checkstyle and Secret Scan.
• Tuned timeouts, retries and parallelism (CompletableFuture) in critical integrations, and designed the JMeter load-testing plan to validate SLAs and find the breaking point.

• Java 11
• Spring Boot
• WebFlux
• Gradle
• AKS
• OpenShift
• GitHub Actions
• SonarQube
• JMeter

Independent period focused on custom solutions and my personal projects.

• Gathered requirements, designed the architecture and built end-to-end solutions, from the database to the user interface.
• Deployed platforms to production on private servers, with Nginx, containers and Cloudflare as the protection layer.
• Applied security and quality practices to every release: code review, automated testing and controlled deployments.

Development and evolution of enterprise Java applications for the firm’s clients.

• Improved the performance of existing applications by refactoring code and strengthening their architecture.
• Integrated RESTful APIs and third-party services to extend system capabilities.
• Introduced unit and automated tests to raise quality and reduce production defects.

• Java
• Spring
• Hibernate
• REST
• Git

Full-stack development in agile teams, from requirements analysis to delivery.

• Built applications with Java, Spring and Hibernate.
• Took part in sprints and agile ceremonies throughout software design and construction.
• Analyzed requirements and delivered solutions tailored to each client.

Modernization of retail microservices within a Scrum team.

• Migrated microservices from Java 8 to Go.
• Optimized existing applications, cutting load times by 30%.
• Built RESTful APIs to integrate internal and external systems.
• Wrote unit and integration tests to ensure software quality.

• Go
• Java 8
• REST
• Scrum

Falabella

Service development for the Cancellations & Returns and Customer BFF projects.

• Built RESTful services in Java 8 to manage order cancellations and returns.
• Contributed to the Customer BFF, the backend layer that tailors retail services to each digital channel.
• Took part in migrating projects from Java to Go.

• Java 8
• Go
• REST
• BFF

Casaideas

Scrum Master for the Casaideas squad on the Easy Store project.

• Facilitated Scrum ceremonies and sprint planning for the squad.
• Managed the backlog with business stakeholders and removed blockers for the team.
• Tracked progress and delivery commitments across the project.

Duoc UC and Universidad Diego Portales

Technical lead accountable for software projects at two higher-education institutions.

• Led the development team and served as the project manager’s focal point for every technical sign-off.
• Ensured the project followed the software development best-practices handbook in full.
• Escalated technical questions and issues to the architect, and worked hand in hand with the functional analyst.
• Deployed services on JBoss Fuse and carried out zero-interruption rolling updates.
• Planned the team’s work, managed project data and prepared progress reports.

• Java
• JBoss Fuse
• Rolling updates

Falabella · KARDEX project

Integration between Falabella and KARDEX, the semi-automated in-store pickup system at Mall Vespucio Norte.

• Helped build the project’s REST API.
• Developed and deployed the services connecting Falabella’s systems with KARDEX.
• Containerized the applications.

• Java
• REST
• Docker

Entel · Banco de Chile · Movistar

Web and mobile development in agile squads, and innovation project management for three major clients.

• Entel: Java developer on web and Android projects using agile methodologies.
• Entel: member of squad UNO in the Entel Digital Transformation program (TDE), working with Ionic, Android and Java, and of the Data Usage project.
• Banco de Chile: project management analyst in the Technology Innovation department for the Mi Banco, Mi Pago and Mi Seguro mobile apps.
• Movistar: Angular development of the Movistar app (Agile Squad #2) and the online customer branch (Agile Squad Anti Frank).

• Java
• Android
• Ionic
• Angular
• Agile

Sodexo

Development and maintenance of enterprise applications for Sodexo.

• Maintained the SOAP and REST web services and the members’ reimbursement portal.
• Built new modules for PANDA, the web application the call center uses to handle customer inquiries.
• Introduced new technologies, planned tasks and prepared reports.

• Spring MVC
• Spring Boot
• Hibernate
• Maven
• Oracle
• SOAP
• REST