<JM/> Jefferson Monteiro Web & Android
Get in Touch
Adelaide, South Australia • Available to Build Web Systems & Android Apps

Senior Java Backend Developer & Android App Specialist

With over 15 years of international engineering experience across Australia, Europe, and Latin America, I am available to build enterprise web systems and native Android apps — delivering scalable cloud architectures, high-performance Spring Boot microservices, and modern mobile solutions from concept to production.

🚀 Available for Web Systems & Android Apps ☕ Java & Spring Boot Specialist 📱 Native Android (Kotlin & Java) ☁️ AWS Solutions Architect Certified 🏛️ Core Banking & Payments 🐳 Docker & CI/CD Automation
Hire Me / Discuss Project View Projects & Apps Experience
jefferson-monteiro.json Adelaide ACST
// Enterprise Java & Mobile Profile
{
  "engineer": "Jefferson Monteiro",
  "location": "Adelaide, South Australia 🇦🇺",
  "experienceYears": 15,
  "availability": "Available to Build Web Systems & Android Apps",
  "services": [
    "Enterprise Web Systems & Cloud Backends",
    "Native Android Mobile Apps (Kotlin & Java)",
    "REST & SOAP API Integration & Automation"
  ],
  "cloudCertifications": [
    "AWS Solutions Architect - Associate",
    "Microsoft Certified: Azure Fundamentals"
  ],
  "status": "Available for Projects & Senior Engineering Roles"
}
> Available now: Ready to build high-performance Web Systems and native Android applications.
About Me

International Engineering, Proven Reliability

Combining over 15 years of deep Java expertise with an international perspective gained from leading enterprise software initiatives across three continents.

I am a Senior Java Software Engineer living in Adelaide, Australia, with a proven track record delivering robust, scalable IT solutions for global enterprises including Credit Union SA, Critical TechWorks (BMW Group), Inetum, Mastercard, and HSBC Global Technology.

My journey spans more than a decade and a half of engineering evolutions: from early enterprise monoliths and Oracle PL/SQL stored procedures to modern cloud-native Spring Boot microservices, Kafka-driven asynchronous event streams, and automated CI/CD pipelines with Docker.

I hold a Bachelor’s degree in Systems Analysis from PUC-PR and a Post-Graduate Specialization in Java Technology and Mobile Development from UTFPR (both WES-verified). Proactive and agile-minded, I excel at evaluating critical REST/SOAP APIs, solving complex backend challenges, and spearheading regression testing automation.

🇦🇺
Australia
Credit Union SA: Core Banking, Loan Origination (LOS), REST/SOAP API evaluation & regression automation.
🇵🇹
Europe (Portugal)
BMW Group MAPP assembly line planning; Inetum Cleva Life insurance legacy transformation.
🇧🇷
Brazil
Mastercard (C&I Anti-fraud, ESS Identity), Bradesco Native Android, and HSBC (8 yrs).
⚡ Available to Build Web Systems & Android Apps

Whether you need a high-scale enterprise Web System engineered with Java / Spring Boot microservices, or a responsive, modern native Android Application (Kotlin/Java) with offline persistence and Google Play store release, I deliver robust end-to-end solutions.

15+
Years Enterprise Experience
3
Continents Worked Across (AU, EU, SA)
2
Global Cloud Certifications (AWS & Azure)
10+
Tier-1 Clients & Institutions
Technical Skills

Battle-Tested Core Technologies

A comprehensive overview of programming languages, frameworks, cloud infrastructure, and databases honed across 15+ years of production software development.

☕

Backend & Core Architecture

Java 8 / 11 / 17 / 20+ Spring Boot Microservices Architecture Spring Batch Spring Integration RESTful API Design SOAP Web Services GraphQL Hibernate / JPA QueryDSL Java CompletableFuture Java EE / Servlets / JSP EJB & JMS
☁️

Cloud, Containers & DevOps

AWS (Solutions Architect Assoc.) Docker CI/CD Pipelines AWS S3, EC2, API Gateway AWS SQS & Lambda Microsoft Azure (AZ-900) Pivotal Cloud Foundry (PCF) Jenkins & Bamboo Git & BitBucket / GitHub Chef Automation
🗄️

Databases & Event Streaming

Oracle Database (8i, 9i, 11g) Oracle PL/SQL Apache Kafka PostgreSQL Microsoft SQL Server MySQL H2 Embedded DB IBM MQ JMS Messaging Data Modeling
🧪

Testing & QA Automation

JUnit 4 & JUnit 5 Mockito & PowerMock Postman (API Test Automation) Python for Test Automation Selenium WebDriver Cucumber (BDD) Regression Automation Frameworks Quality Center
📱

Mobile & Frontend Technologies

Android Native (Kotlin & Java) JavaFX (MVVM Pattern) JavaScript & TypeScript HTML5 & CSS3 Thymeleaf & Bootstrap Angular / AngularJS SAP Hybris e-Commerce JasperReports & Crystal Reports
🏛️

Domain Expertise & Methodologies

Core Banking & Internet Banking Loan Origination Systems (LOS) Cyber Security & Anti-Fraud Digital Identity Verification Industrial Automotive Assembly Life & Non-Life Insurance Agile / Scrum Methodologies CMMI Dev Standards Technical Team Leadership
Featured Projects

Engineering At Enterprise Scale

A curated showcase of mission-critical systems and mobile applications I have engineered, ranging from published Google Play store apps to global automotive and banking infrastructures.

Published App Independent / Australia

Australian Home Budget

A personal finance and household budget management application tailored specifically for the Australian financial environment, helping individuals and families track expenditures, categorize income streams, and analyze savings habits.

Engineered with clean architectural principles on Android with offline-first local data persistence.
Interactive budgeting charts, intuitive categorization, and financial summary reporting.
Live in production on the Google Play Store with active Australian users.
Android Kotlin Material Design Room DB Clean Architecture
Google Play Store GitHub
Published App Independent / Australia

Golden Connect AU

A localized Australian community connection and services app facilitating communication and service discovery for businesses and residents across Australia.

Integrated RESTful backend microservices with real-time mobile API data synchronization.
Optimized for low-bandwidth mobile performance with reactive state management and image caching.
Published and maintained on the Google Play Store for the Australian market.
Android Java / Kotlin REST APIs Cloud Backend JSON
Google Play Store GitHub
Enterprise System Critical TechWorks • BMW Group

BMW Production Line Planning (MAPP)

MAPP (Multiple Assembly Planning & Process System) is the core operational software responsible for orchestrating BMW’s physical automotive car production and vehicle assembly lines across European plants.

Developed and maintained mission-critical Spring Boot REST microservices powering line execution.
Engineered high-performance desktop operator interfaces using JavaFX with MVVM component patterns.
Integrated IBM MQ messaging pipelines, Oracle 11g database persistence, and automated Jenkins CI/CD.
Java 11 Spring Boot JavaFX (MVVM) Oracle 11g IBM MQ Docker Jenkins
Role Details GitHub
FinTech • Security Wipro • Mastercard

Mastercard Anti-Fraud & Intelligence

High-scale cloud and event-driven intelligence platform built to monitor, detect, and prevent fraudulent financial transactions across global Mastercard processing networks.

Architected batch processing and real-time transaction streaming using Spring Batch and Apache Kafka.
Deployed microservices to Pivotal Cloud Foundry (PCF) with Chef configuration automation.
Ensured high availability, stringent PCI-DSS compliance, and millisecond-latency transaction analysis.
Java Core & EE Spring Boot Spring Batch Apache Kafka Pivotal Cloud Foundry Chef
Role Details GitHub
Banking • Australia Credit Union SA (Adelaide)

Core Banking API & Test Automation Suite

Central integration hub and automated regression verification platform connecting Credit Union SA's Core Banking engines, Loan Origination Systems (LOS), and Internet Banking systems with third-party Australian financial vendors.

Conducted rigorous API security and architectural compliance evaluations for REST and SOAP services.
Spearheaded automated testing frameworks utilizing Python, Selenium, Postman, and Docker in CI/CD.
Significantly accelerated regression test cycle speeds while eliminating human errors in release cycles.
Java Spring Boot Python Automation Selenium Postman Docker Cucumber
Role Details GitHub
Enterprise Security Wipro • Mastercard

Mastercard Digital Identity Platform

Enterprise Service Solutions (ESS) platform unifying multi-product digital identity verification into a secure, cohesive user experience for international cardholders and banking institutions.

Engineered resilient Java Spring Boot REST microservices interfacing with distributed security stores.
Enabled unified customer identification workflows with end-to-end cryptographic integrity.
Contributed to cloud deployments on Azure and Pivotal Cloud Foundry.
Java EE Spring Boot Microservices Azure RESTful APIs OAuth / Security
Role Details GitHub
Career History

Professional Experience

A chronological timeline of senior software engineering, architecture, and technical consulting positions across Australia, Portugal, and Brazil.

Senior Backend Developer

Credit Union SA • Adelaide, SA, Australia 🇦🇺
August 2024 – January 2026

Responsible for backend engineering, API governance, and automation across core banking, lending platforms (Loan Origination Systems - LOS), and internet banking infrastructure.

  • API Evaluation & Integration: Conducted comprehensive evaluations and architecture reviews of REST and SOAP APIs, ensuring strict compliance with financial standards and security protocols while integrating with core banking and third-party vendors.
  • Automation Implementation: Led engineering initiatives to automate regression testing and operational workflows using Postman, Docker, and CI/CD pipelines, significantly speeding up release validation cycles.
  • Full Lifecycle Engineering: Built web application tools with Thymeleaf and Bootstrap to improve the QA regression pipeline, reducing manual overhead and increasing defect detection speed.
  • Stakeholder & Vendor Collaboration: Analyzed system requirements with executive stakeholders and external FinTech vendors to guide integration architecture.
Java Core Spring Boot REST & SOAP APIs Selenium Python Automation Postman Docker Core Banking

Senior Software Engineer

Critical TechWorks (BMW Group Joint Venture) • Portugal 🇵🇹
January 2024 – July 2024

Engineered core features and maintenance for the MAPP System (Multiple Assembly Planning & Process System), the mission-critical software managing BMW's physical vehicle production lines across European manufacturing plants.

  • Developed resilient Spring Boot REST microservices providing real-time references and data resources to assembly line operator systems.
  • Built responsive desktop UI features using JavaFX with a custom MVVM pattern component library.
  • Maintained Jenkins CI/CD automation pipelines for continuous deployment across containerized Docker environments.
  • Provided Level-2 operational support, diagnosing edge-case performance bottlenecks in Oracle 11g and IBM MQ messaging.
Java 8 & 11 Spring Boot JavaFX (MVVM) Oracle 11g IBM MQ Docker JasperReports Jenkins CI/CD

Senior Consultant Developer

Inetum • Porto, Portugal 🇵🇹
September 2021 – January 2024

Specialized in enterprise modernization and insurance software engineering for Cleva Life (Version 7.0), servicing major European life and non-life insurance carriers.

  • Spearheaded modernization initiatives rewriting legacy AS-400 (IBM Framework) business code into modern, maintainable Java with comprehensive unit test coverage.
  • Engineered Spring REST services with JPA/Hibernate entity mappings to feed data to modern customer-facing screens.
  • Managed database persistence across Oracle 9i/10g and integrated continuous integration with Jenkins and Gerrit.
Java Core Spring Boot JPA / Hibernate Oracle 9i & 10g Jenkins Gerrit AS-400 Migration

Senior Software Engineer

Wipro Limited • Mastercard Projects • Brazil / Global 🇧🇷
February 2018 – August 2021

Delivered high-impact solutions across three high-profile global Mastercard engineering initiatives:

1. Mastercard Digital Identity (July 2020 – August 2021): Developed Spring Boot microservices for the Enterprise Security Solutions (ESS) platform, unifying customer digital verification with high reliability and security.
2. Cyber Security & Intelligence - C&I (August 2019 – July 2020): Engineered fraud prevention services using Spring Batch and Kafka event streaming, orchestrating deployments on Pivotal Cloud Foundry (PCF) and Chef.
3. Global Reports - CGR (February 2018 – July 2019): Built complex data processing queries with Oracle 11g and Java Criteria for high-throughput global card reporting.
Java EE Spring Boot Spring Batch Apache Kafka Pivotal Cloud Foundry Azure Oracle 11g Microservices

Senior Consultant Analyst

FH Consulting • Brazil 🇧🇷
March 2017 – February 2018

Delivered enterprise e-commerce platform architecture and development on SAP Hybris for tier-1 national enterprises including Hering, Pearson, and Dpaschoal.

  • Conducted requirements gathering, architectural customization, and backend integration.
  • Maintained and optimized high-transaction digital commerce backbones.
Java SAP Hybris Spring E-Commerce Architecture

Senior Mobile Developer • Android Native

Bradesco – Scopus • Brazil 🇧🇷
August 2016 – March 2017

Engineered native Android banking and healthcare applications for one of Latin America's largest financial institutions.

  • Bradesco Saúde: Built the native Android application integrating Spring Boot REST microservices for health policyholders.
  • Clube de Vantagens: Built consumer discount platform with Glide image caching and secure JSON communications.
Android Native Java & Kotlin REST APIs Spring Boot Backend

Software Developer (Junior → Senior & Global Lead)

HSBC – Global Technology (GLT) • Brazil / Global 🇧🇷
August 2008 – March 2016 (8 Years)

Over eight formative years at HSBC's global technology hub, advanced through progressive software engineering and leadership responsibilities:

  • Global Banking Marketing (GBM): Served as Global Developer Lead on the CBID (Correspondent Bank Identifier) cross-border payment routing system; project selected for CMMI Dev certification; engineered Spring/Hibernate APIs with Oracle 9i.
  • Global Business Solutions (GBS): Worked as Service Modeler utilizing IBM BPM Process Designer and SET (Service Engineering Tool) creating the foundational architectural blueprint for GBS.
  • HBBR Data Middleware Layer (DML): Built high-volume data middleware pipelines utilizing Spring Integration and Spring Batch for stock exchange and private banking operations.
  • GLT EMEA: Developed mobile management solutions (Bramble) for UK HSBC staffs, utilizing JSE Swing, Servlets, and JSP.
Java SE & EE Spring Framework Spring Batch Hibernate / JPA IBM BPM Oracle 9i CMMI Dev Team Leadership

Software Developer & Trainee Foundation

Infomatrix, DB Master Systems & Roque e Correia • Brazil 🇧🇷
2006 – 2008

Early career foundation in industrial automation, SCADA systems (Elipse E3, VBScript), Oracle PL/SQL stored procedures, Crystal Reports generation, and database administration with SQL Server.

Credentials

Education & Certifications

Academic qualifications and industry credentials backed by international credential verification (World Education Services - WES).

🏅 Industry Certifications

☁️

AWS Certified Solutions Architect – Associate

Amazon Web Services (AWS)
Validated skills in designing highly available, cost-effective, and scalable AWS cloud architectures.
✓ Certified Solutions Architect
🔷

Microsoft Certified: Azure Fundamentals (AZ-900)

Microsoft
Foundational knowledge of cloud services, Azure architecture, security, and governance.
✓ Certified Azure Fundamentals
🌐

Verified International Academic Qualifications

World Education Services (WES)
Official evaluation verifying higher education degrees for international professional equivalence.
✓ WES Verified

🎓 Academic Degrees

🎓

Specialist in Java Technology & Mobile Development

UTFPR – Universidade Tecnológica Federal do Paraná
Post-Graduate Specialization • Completed 2013
📜

Bachelor of Science in Systems Analysis

PUC-PR – Pontifícia Universidade Católica do Paraná
Undergraduate Degree • Completed 2010
🔬

Degree in Medical Radiology Technology

UTFPR – Universidade Tecnológica Federal do Paraná
Completed 2008
🗣️

Spoken Languages

English: Professional Working Proficiency (Australia & Global Enterprise teams)
Portuguese: Native Proficiency
Spanish: Basic
Get in Touch

Let's Build Your Web System or Android App

Based in Adelaide, Australia, I am available to build robust enterprise web systems, scalable backend architectures, and native Android mobile apps. Let's discuss your project or senior opportunity.

Email Address
jeffermonteiro@gmail.com
Mobile Phone (Australia)
+61 478 610 401
Location
Adelaide, South Australia 🇦🇺
Professional Network
linkedin.com/in/jefferson-monteiro-58503b61
GitHub Profile
github.com/JeffersonMonteiro

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