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I am a Senior Full-Stack Software Engineer with over 12 years of experience building robust applications using Java, Spring Boot, React, Angular, AWS, Azure, and microservices architecture. I specialize in cloud-native development, CI/CD automation, and serverless computing, focusing on designing scalable, high-performance systems. Throughout my career, I have modernized legacy applications, improved performance, and delivered secure and reliable solutions across healthcare, e-commerce, and financial sectors. I have led large-scale software projects, mentoring teams on best practices in Java and Spring Boot microservices, cloud architecture, and agile methodologies. I excel in driving cloud migration, developing AI and machine learning-powered services, and integrating complex APIs with a strong emphasis on compliance and security standards such as HIPAA and PCI-DSS. My expertise includes combining backend engineering with modern frontend technologies to provide seamless user experiences on desktop and mobile platforms.…I am a Senior Full-Stack Software Engineer with over 12 years of experience building robust applications using Java, Spring Boot, React, Angular, AWS, Azure, and microservices architecture. I specialize in cloud-native development, CI/CD automation, and serverless computing, focusing on designing scalable, high-performance systems. Throughout my career, I have modernized legacy applications, improved performance, and delivered secure and reliable solutions across healthcare, e-commerce, and financial sectors. I have led large-scale software projects, mentoring teams on best practices in Java and Spring Boot microservices, cloud architecture, and agile methodologies. I excel in driving cloud migration, developing AI and machine learning-powered services, and integrating complex APIs with a strong emphasis on compliance and security standards such as HIPAA and PCI-DSS. My expertise includes combining backend engineering with modern frontend technologies to provide seamless user experiences on desktop and mobile platforms.

Sergio Cruz

Full Stack Developer, Developer, AI Engineer, +3

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I am a Senior Full-Stack Software Engineer with over 12 years of experience building robust applications using Java, Spring Boot, React, Angular, AWS, Azure, and microservices architecture. I specialize in cloud-native development, CI/CD automation, and serverless computing, focusing on designing scalable, high-performance systems. Throughout my career, I have modernized legacy applications, improved performance, and delivered secure and reliable solutions across healthcare, e-commerce, and financial sectors. I have led large-scale software projects, mentoring teams on best practices in Java and Spring Boot microservices, cloud architecture, and agile methodologies. I excel in driving cloud migration, developing AI and machine learning-powered services, and integrating complex APIs with a strong emphasis on compliance and security standards such as HIPAA and PCI-DSS. My expertise includes combining backend engineering with modern frontend technologies to provide seamless user experiences on desktop and mobile platforms.…I am a Senior Full-Stack Software Engineer with over 12 years of experience building robust applications using Java, Spring Boot, React, Angular, AWS, Azure, and microservices architecture. I specialize in cloud-native development, CI/CD automation, and serverless computing, focusing on designing scalable, high-performance systems. Throughout my career, I have modernized legacy applications, improved performance, and delivered secure and reliable solutions across healthcare, e-commerce, and financial sectors. I have led large-scale software projects, mentoring teams on best practices in Java and Spring Boot microservices, cloud architecture, and agile methodologies. I excel in driving cloud migration, developing AI and machine learning-powered services, and integrating complex APIs with a strong emphasis on compliance and security standards such as HIPAA and PCI-DSS. My expertise includes combining backend engineering with modern frontend technologies to provide seamless user experiences on desktop and mobile platforms.

Available to hire

I am a Senior Full-Stack Software Engineer with over 12 years of experience building robust applications using Java, Spring Boot, React, Angular, AWS, Azure, and microservices architecture. I specialize in cloud-native development, CI/CD automation, and serverless computing, focusing on designing scalable, high-performance systems. Throughout my career, I have modernized legacy applications, improved performance, and delivered secure and reliable solutions across healthcare, e-commerce, and financial sectors.

I have led large-scale software projects, mentoring teams on best practices in Java and Spring Boot microservices, cloud architecture, and agile methodologies. I excel in driving cloud migration, developing AI and machine learning-powered services, and integrating complex APIs with a strong emphasis on compliance and security standards such as HIPAA and PCI-DSS. My expertise includes combining backend engineering with modern frontend technologies to provide seamless user experiences on desktop and mobile platforms.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Spanish; Castilian

Advanced

Work Experience

Senior Software Engineer at Epic

July 1, 2025 - September 2, 2025

Led the development of ambient listening microservices enabling real-time transcription of clinical conversations, optimizing physician charting time by 30–35%. Built a conversational search engine integrated with ElasticSearch and Azure Cognitive Search to enable natural language queries across FHIR endpoints, improving clinician decision-making efficiency. Engineered a precision nursing workloads scheduling system balancing patient acuity and staffing availability, reducing overtime and improving scheduling efficiency. Enhanced MyChart patient portal with interactive care journeys, boosting patient engagement. Modernized Epic’s patient communication platform to achieve secure, HIPAA-compliant live chat communications. Integrated AI-powered virtual assistant for appointment scheduling, refills, and FAQs, reducing administrative workload. Developed intelligent OR and infusion center scheduling algorithms improving utilization and reducing conflicts. Created AI-driven billing automa

Senior Full Stack Developer at Apple

February 1, 2021 - September 2, 2025

Designed and developed multi-tenant SaaS e-commerce platforms implementing subscription billing, PCI-compliant payment processing, and scalable backend architectures on SQL Server/PostgreSQL supporting millions of transactions. Led a team of 10 developers driving full-stack delivery across Java, C#, Node.js/Express, and Ruby on Rails projects integrating marketing, e-commerce, and internal business applications. Built dynamic responsive front-ends with React, Angular, Vue, Svelte, and Thymeleaf achieving seamless UX across desktop and mobile platforms. Migrated legacy intranet and WordPress subsites to AWS cloud platform enabling autoscaling, improved availability, and modernized security. Developed real-time healthcare data pipelines integrating HL7, Spring Boot ETL services, and C# ingestion APIs supporting HIPAA-compliant data exchange with public health registries. Built secure RESTful APIs securing internal and third-party integrations leveraging Vault dynamic secrets, OAuth 2, an

Full Stack Developer at Infuse

February 1, 2018 - September 2, 2025

Designed and developed a high-performance financial transaction platform using Java 11–17 (Spring Boot), C# .NET Core, and Go services implementing multi-tenant architectures for banks and financial institutions ensuring secure, reliable, and scalable transaction processing. Developed and optimized RESTful APIs with Spring Boot, ASP.NET Core, and Node.js/Express for core banking functions like account management, fund transfers, reconciliation, and balance updates reducing manual errors and improving operational efficiency. Integrated secure payment processing systems with PayPal REST APIs, Authorize.Net, PHP/Laravel services, and internal gateways enforcing PCI-DSS compliance, TLS encryption, tokenization, and detailed audit trails. Improved transaction throughput applying JDBC, Dapper (C#), and EF Core optimizations with advanced indexing strategies reducing latency by 40% in high-frequency trading scenarios. Built interactive financial dashboards using Power BI, JasperReports, Ang

Software Development Intern at Scalo

April 1, 2013 - September 2, 2025

Developed internal business applications using Java 8–11 (Spring Boot), C# .NET Framework, and PHP/Laravel implementing CRUD operations, validation logic, and modular service layers to streamline enterprise workflows. Designed and implemented interactive web interfaces with HTML5, CSS3, JavaScript, jQuery, and basic AngularJS creating responsive dashboards and forms improving usability for internal teams. Built RESTful endpoints with Spring Boot, ASP.NET Web API, and Node.js/Express enabling secured data exchange between front-end dashboards and backend SQL Server/PostgreSQL systems. Collaborated with senior developers optimizing SQL queries, stored procedures, and indexing strategies in SQL Server and PostgreSQL improving reporting performance. Assisted in migrating legacy desktop systems into web-based multi-tier architectures leveraging Java, C#, and Ruby on Rails gaining experience with layered design, modularization, and separation of concerns. Developed basic client-side visual

Senior Software Engineer at Epic

July 1, 2025 - September 2, 2025

Led the development of ambient listening microservices leveraging Java 17 (Spring Boot) and C# .NET 6 with Azure Cognitive Services, enabling real-time transcription of clinical conversations and structured medical notes, reducing physician charting time by 30–35%. Built a conversational search engine integrating Elasticsearch and Azure Cognitive Search to improve natural language queries across FHIR endpoints, enhancing clinician decision-making efficiency. Engineered a precision nursing workload scheduling system balancing patient acuity and staffing availability, reducing overtime and improving schedule efficiency. Enhanced the MyChart patient portal with interactive care journeys, milestone tracking, and reminders using Angular 12, Spring MVC, and Azure Functions. Modernized legacy Epic modules to microservices on AKS with DDD and CQRS, increasing scalability and resilience. Designed AI-powered virtual assistant integrations supporting conversational self-service for appointment

Senior Full Stack Developer at Apple

February 1, 2021 - September 2, 2025

Designed and developed multi-tenant SaaS e-commerce platforms using Java 17 (Spring Boot), C# .NET Core, PHP/Laravel, and Go microservices, implementing subscription billing and PCI-compliant payment processing to support millions of transactions. Led a 10-developer team across Java, C#, Node.js/Express, and Ruby on Rails projects, delivering full-stack marketing, e-commerce, and internal business applications with timely, secure releases. Built dynamic responsive front-ends with React, Angular 10–12, Vue, and Thymeleaf integrating Spring Boot and ASP.NET Core backends to ensure seamless UX across desktop and mobile. Migrated legacy intranet systems to AWS EC2, RDS, and S3, modernized security and enabled autoscaling. Developed real-time healthcare data pipelines using HL7, Spring Boot ETL services, and C# APIs integrating LIS systems with public health registries for HIPAA-compliant data exchange. Created secure RESTful APIs in Spring Boot, ASP.NET Core Web API, Django, Node.js/Exp

Full Stack Developer at Infuse

February 1, 2018 - September 2, 2025

Designed and developed high-performance financial transaction platforms using Java 11–17 (Spring Boot), C# .NET Core, and Go microservices with multi-tenant architectures for banks and financial institutions, ensuring secure, scalable transaction processing. Developed and optimized RESTful APIs for core banking functions, including account management, fund transfers, reconciliation, and balance updates, improving operational efficiency and reducing manual errors. Integrated secure payment processing systems with PayPal REST APIs, Authorize.Net, and PHP/Laravel enforcing PCI-DSS compliance with tokenization and detailed audit trails. Built interactive financial dashboards using Power BI, JasperReports, Angular, and ReactJS delivering real-time revenue, risk, and compliance insights. Automated CI/CD pipelines with Jenkins, TeamCity, Octopus Deploy, and GitLab CI/CD enabling repeatable deployments for financial APIs and reporting modules. Architected multi-tier SOA platforms with Sprin

Software Development Intern at Scalo

April 1, 2013 - September 2, 2025

Developed internal business applications using Java 8–11 (Spring Boot), C# .NET Framework, and PHP/Laravel implementing CRUD operations, validation logic, and modular service layers to streamline enterprise workflows. Designed and implemented interactive web interfaces with HTML5, CSS3, JavaScript, jQuery, and basic AngularJS creating responsive dashboards and forms enhancing internal team usability. Built RESTful endpoints with Spring Boot, ASP.NET Web API, and Node.js/Express enabling secure data exchange between front-end dashboards and backend SQL Server/PostgreSQL databases. Collaborated with senior developers to optimize SQL queries, stored procedures, and indexing strategies in SQL Server and PostgreSQL improving reporting performance. Assisted in migrating legacy desktop systems to web-based multi-tier architectures with Java, C#, and Ruby on Rails gaining experience in layered design and modularization. Developed basic client-side visualizations using JavaScript charting li

Senior Software Engineer at Epic

July 1, 2025 - September 2, 2025

Led the development of multiple healthcare-related microservices and cloud-native applications using Java 17, Spring Boot, and Azure Cognitive Services to enable real-time transcription, conversational search, and AI-powered virtual assistants, reducing physician charting time and administrative load. Engineered scalable, secure, and compliant systems for patient scheduling, communication, and billing automation, integrating FHIR/HL7 standards and secure authentication mechanisms. Migrated legacy modules to microservices architecture on Azure Kubernetes Service, improving maintainability and scalability. Developed event-driven pipelines with Apache Kafka, optimized SQL Server queries, and containerized services for zero-downtime deployments, mentoring engineers to improve productivity and code quality.

Senior Full Stack Developer at Apple

February 1, 2021 - September 2, 2025

Designed and developed multi-tenant SaaS e-commerce platforms with Java 17, Spring Boot, and SQL Server/PostgreSQL supporting subscription-based billing and secure payment processing. Led a team of 10 developers delivering web and mobile applications using React, Angular, Vue, and Thymeleaf integrated with Spring Boot REST APIs and microservices. Migrated legacy intranet systems to AWS cloud improving security and auto-scaling capabilities. Built healthcare data pipelines compliant with HIPAA and integrated secure RESTful APIs using OAuth 2.0 and RBAC. Developed interactive dashboards with Angular, Thymeleaf, Tailwind CSS, and D3.js. Enhanced user experience by optimizing frontend performance and modernizing legacy codebases. Integrated Salesforce Lightning and built workflow orchestration systems while mentoring developers on secure coding and testing best practices.

Full Stack Developer at Infuse

February 1, 2018 - September 2, 2025

Developed a high-performance financial transaction platform with Java 11-17, Spring Boot, and SQL Server/PostgreSQL supporting multi-tenant banking transactions and real-time balance updates. Integrated secure payment processing using PayPal APIs enforcing PCI-DSS compliance with tokenization and TLS encryption. Developed RESTful APIs and responsive financial web apps with Angular, Knockout.js, HTML5, CSS3, and JavaScript ES6, implementing dashboards for account management and auditing. Automated CI/CD pipelines using Jenkins and TeamCity and managed deployments with Octopus Deploy. Built scalable service-oriented architectures handling fraud detection, reconciliation, and risk reporting. Implemented real-time consultation features using WebRTC for secure client-advisor communications and mentored junior developers on microservices best practices and secure financial system coding.

Software Development Intern at Scalo

April 1, 2013 - September 2, 2025

Developed internal business applications using Java 8-11, Spring Boot, and JDBC implementing CRUD operations and input validation to streamline enterprise workflows. Designed interactive web interfaces with HTML5, CSS3, JavaScript, and jQuery creating responsive dashboards and forms to improve internal usability. Built RESTful endpoints enabling secure data exchange between front-end dashboards and backend SQL Server/PostgreSQL databases. Assisted senior developers optimizing SQL queries, stored procedures, and indexing to improve data retrieval performance. Developed client-side visualizations and charts using JavaScript libraries to provide intuitive insights into internal metrics. Participated in unit testing and debugging with JUnit and TestNG and contributed to Agile processes including sprint planning and daily stand-ups.