Senior Backend / Fullstack Developer

Backend expertise.
Business-minded delivery.

16+ years developing and integrating systems for banking, digital payments, telecommunications and the public sector.

Java and Spring Boot are my core expertise. I also develop services with Node.js and web interfaces with Angular.

Contact me on WhatsApp Explore my work

Open to 100% remote opportunitiesBased in Ayacucho, Peru

16+years of experience

4business sectors

6professional case studies

Project experience for

BCI ChileCulqiInterbankPublic MinistrySUNATClaro Perú

01 / Applied experience

Beyond the stack.
Real-world systems.

Selected projects from my professional experience, showing where I have contributed and how I work. Start with banking and payments, then explore the technical details.

01Featured

BCI Chile

Transactional integrations for foreign exchange banking

Backend development and financial systems integration for BCI’s foreign currency management division.

Integration LeadApr 2025 - May 2026

Java 11Spring BootREST APIsSWIFT

Explore technical contribution

Developed and maintained Java 11 / Spring Boot services and transactional APIs.
Integrated SWIFT-related financial services and participated in Azure / Kubernetes deployment validation with Jenkins.
Developed tests using Spock and assessed code quality and security vulnerabilities using SonarQube and Veracode.

AI during this periodUsed GitHub Copilot, OpenAI Codex and Claude to support development, with agent skills and Model Context Protocol (MCP) integrations where applicable. All work remained subject to human review and technical validation.

Technologies: Java 11 · Spring Boot · REST APIs · SWIFT · Azure · Kubernetes · Jenkins · Spock · SonarQube · Veracode

SmartJob - BCI Chile

Culqi

Yape payment integration in PCI-oriented platform

Integrated instant digital payments into a payment platform using digital certificates, asynchronous workflows and cloud-native components.

Technical Systems Analyst | Java BackendMay 2022 - May 2023

Java 11Spring BootAWS LambdaDynamoDB

Explore technical contribution

Handled digital certificates for secure API invocation.
Designed event-based processing using Lambda, SQS and backend services.
Applied Event Notification and Event Carried State Transfer patterns.

Technologies: Java 11 · Spring Boot · AWS Lambda · DynamoDB · SQS · Micronaut · Redis

Culqi

Interbank

Distributed process platform with CQRS and resilient messaging

Built resilient backend microservices integrated with Azure messaging and observability tooling for critical banking processes.

Senior Backend DeveloperOct 2024 - Feb 2025

Java 11Spring BootAzure Service BusRedis

Explore technical contribution

Applied CQRS to separate command and query responsibilities.
Implemented retry with backoff, fallback handlers and non-destructive error handling.
Improved traceability through New Relic and Azure Monitor integrations.

AI during this periodUsed GitHub Copilot and Claude to support development, with human review and validation.

Technologies: Java 11 · Spring Boot · Azure Service Bus · Redis · CQRS · Azure Monitor · JUnit

Interbank - VERIINFO

Public Ministry

Event-driven modernization of notification systems

Modernized legacy systems into Angular and Spring Boot modules deployed on OpenShift with Kafka-based asynchronous processing.

Fullstack DeveloperMay 2023 - Sep 2024

Java 17Spring Boot 3AngularKafka

Explore technical contribution

Refactored notification workflows using Kafka events.
Delivered CI/CD deployment pipelines for containerized services.
Improved maintainability and code quality with SonarQube-driven practices.

AI during this periodUsed GitHub Copilot and Claude to support development, with human review and validation.

Technologies: Java 17 · Spring Boot 3 · Angular · Kafka · OpenShift · Redis · Docker · Jenkins

Public Ministry - Office of the Attorney General of Peru

SUNAT

Event-driven tax platform for national-scale workloads

Built and operated high-volume transaction services for annual tax filing processes used by Peruvian taxpayers.

Technical Lead | Java Backend2019 - 2022

Java 8DropwizardKafkaRedis

Explore technical contribution

Implemented Kafka-based event architecture with retries, DLQ and manual offset control.
Optimized performance using request/response compression and load balancing.
Improved availability through resilient processing and non-destructive error handling.

Technologies: Java 8 · Dropwizard · Kafka · Redis · MongoDB · Informix · Spring Boot · ELK

SUNAT - CANVIA

Claro Perú

Payment Engine for high-volume telecom transactions

Designed backend services and led their development for a proprietary payment platform integrating banks, Visa and internal portals under security and auditability requirements.

Technical Lead2018 - 2019

Java 8Spring BootOracleWebLogic

Explore technical contribution

Designed decoupled services for real-time payment processing.
Integrated banking and Visa flows with traceability and operational control.
Supported large-scale daily migration processes using Java multithreading and shell automation.

Technologies: Java 8 · Spring Boot · Oracle · WebLogic · OSB · SOAP · REST · ELK

Claro Peru - Global Hitss

02 / Track record

Experience that connects.

Selected roles and employment dates. My complete professional background is available on LinkedIn.

View experience on LinkedIn

Apr 2025 - May 2026

Integration Lead

SmartJob - BCI Chile

Oct 2024 - Feb 2025

Senior Backend Developer

Interbank - VERIINFO

May 2023 - Sep 2024

Fullstack Developer

Public Ministry - Office of the Attorney General of Peru

May 2022 - May 2023

Technical Systems Analyst | Java Backend

Culqi

2019 - 2022

Technical Lead | Java Backend

SUNAT - CANVIA

2018 - 2019

Technical Lead

Claro Peru - Global Hitss

03 / Expertise

Backend depth. End-to-end perspective.

I combine a strong foundation in Java and Spring Boot with experience in Node.js and Angular to build end-to-end solutions.

PrimaryComplementaryBasic

Backend & APIs

JavaPrimarySpring BootPrimaryQuarkusMicronautNode.jsComplementary

Frontend

AngularComplementaryTypeScriptJavaScriptReact (basic)Basic

Events & data

KafkaRedisAzure Service BusOraclePostgreSQLMongoDB

Cloud & delivery

AWS LambdaKubernetesOpenShiftDockerSonarQubeJenkinsGitLab CI/CD

AI supports the work. Judgment stays human.

I currently use GitHub Copilot, OpenAI Codex and Claude, alongside agent skills and Model Context Protocol (MCP) integrations, to support analysis, implementation, testing and documentation. I review generated code and results and validate them technically. Each case study describes the tools used during that period.

01Analyze
02Implement
03Test
04Review

Technical accountability remains human.

Let’s discuss your next project

Looking for an experienced backend or fullstack developer for your team?

I’m looking for 100% remote backend, fullstack and integration opportunities. Let’s discuss the challenge, the team and where I can contribute.

Ayacucho, PeruSpanish · Basic English

Send me an emailavillanueva198x@gmail.com

Contact me on WhatsApp Request an updated CV

Backend expertise.Business-minded delivery.

Beyond the stack.Real-world systems.

Transactional integrations for foreign exchange banking

Yape payment integration in PCI-oriented platform

Distributed process platform with CQRS and resilient messaging

Event-driven modernization of notification systems

Event-driven tax platform for national-scale workloads

Payment Engine for high-volume telecom transactions

Experience that connects.

Integration Lead

Senior Backend Developer

Fullstack Developer

Technical Systems Analyst | Java Backend

Technical Lead | Java Backend

Technical Lead

Backend depth. End-to-end perspective.

Backend & APIs

Frontend

Events & data

Cloud & delivery

AI supports the work. Judgment stays human.

Looking for an experienced backend or fullstack developer for your team?

Backend expertise.
Business-minded delivery.

Beyond the stack.
Real-world systems.