Professional Work Machadao Labs @ NCSU
At NCSU, I contribute to the RabApp (Rapid Access Biosecurity App), developing robust full-stack solutions to modernize disease surveillance and biosecurity data management.
Technical Growth & Adaptability
Prior to joining Machado Labs, I had zero prior experience with Java, Spring Boot, TypeScript, or Angular. Within just a couple of months, I successfully pivoted from my previous background to mastering this enterprise-grade stack. I taught myself the complexities of dependency injection, reactive state management, and cloud-first architecture to deliver production-ready features for RabApp on a highly accelerated timeline.
Role & Responsibilities
- Managed complex data pipelines, importing Python-processed Parquet files into SQL databases.
- implemented portions of the Disease Surveillance subsection of the platform.
- Enforced rigorous data access controls aligned with company hierarchy restrictions.
- Worked with peers to refactor on-the-fly PDF generation using Thymeleaf contexts for dynamic reports.
- Engineered and migrated database schemas using DBeaver and custom Python scripts.
- Orchestrated local development environments using a Docker stack to mirror AWS production.
- Optimized performance by identifying and fixing memory leaks in the ASF page using profiling tools.
Key Technologies
Workflow & Tools
I utilize a professional suite of tools to ensure high-quality software delivery: Postman for API testing, IntelliJ/VS Code for development, and Jira/Confluence/Figma for agile collaboration and design alignment.
Visuals & Code Snippets
Preview of the Disease Surveillance module interface.
Code Snippet: Dynamic PDF Generation
/**
* Processes a single InformationPlan (question/answer) item, extracts the answer,
* performs necessary formatting, and sets the result into the Thymeleaf context.
*
* @param pdfDataRow The object containing the question and answer data.
* @param context The Thymeleaf context to set variables in.
*/
public boolean tryPopulateThymeleafContextWithAnswer(PdfDataRowProjection pdfDataRow, final Context context) {
JsonNode answerNode = this.inputTypeService.safelyParseJson(pdfDataRow.getAnswerJson());
final SPSQuestion.QuestionMultipartType questionType = pdfDataRow.getQuestionType();
final String questionShortName = pdfDataRow.getQuestionShortName();
boolean success = switch (questionType) {
case MULTI_CHECKBOX -> populateMultiCheckboxAnswer(answerNode, questionShortName, context);
case TABLE -> populateTableAnswer(answerNode, questionShortName, context);
case SINGLE_ANSWER -> {
if (answerNode == null) {
LOG.error("Failed to populate SINGLE_ANSWER for question: {}. Answer node is null.", questionShortName);
context.setVariable(questionShortName, "N/A");
yield false;
}
context.setVariable(questionShortName, answerNode.textValue());
yield true;
}
};
if(!success) return false;
if (questionType == SPSQuestion.QuestionMultipartType.SINGLE_ANSWER) {
String singleAnswerText = "";
if (Objects.requireNonNull(answerNode).isTextual()) {
singleAnswerText = answerNode.textValue().trim();
}
// formatting
String formattedAnswer = this.inputTypeService.formatAnswerForEmptyOrPhoneNaive(questionShortName, singleAnswerText);
context.setVariable(questionShortName, formattedAnswer);
}
return true;
}
private boolean populateMultiCheckboxAnswer(JsonNode answerNode, String questionShortName, Context context)
{
try
{
// MULTI_CHECKBOX should always be an array of strings
if (answerNode != null && answerNode.isArray()) {
List selectedOptions = new ArrayList<>();
for (JsonNode node : answerNode) {
if (node.isTextual()) {
selectedOptions.add(node.textValue());
} else {
throw new RuntimeException(
"Unexpected JSON type in MULTI_CHECKBOX for '" + questionShortName +
"'. Expected array of strings but encountered: " + node.getNodeType() +
" → " + node
);
}
}
context.setVariable(questionShortName, selectedOptions);
}
} catch (Exception e) {
LOG.error("Failed to parse TABLE JSON array for {}: {}", questionShortName, e.getMessage());
context.setVariable(questionShortName, Collections.emptyList());
return false;
}
return true;
}
private boolean populateTableAnswer(JsonNode answerNode, String questionShortName, Context context)
{
try
{
List> tableData = new ArrayList<>();
if (answerNode != null && answerNode.isArray()) {
for (JsonNode rowNode : answerNode) {
// Each row must be an object: { key: value }
if (!rowNode.isObject()) continue;
Map row = new LinkedHashMap<>();
for (Map.Entry field : rowNode.properties()) {
JsonNode value = field.getValue();
if (value.isNull()) {
row.put(field.getKey(), "");
} else if (value.isValueNode()) {
row.put(field.getKey(), value.textValue());
} else {
row.put(field.getKey(), value.toString());
}
}
tableData.add(row);
}
}
context.setVariable(questionShortName , tableData);
} catch (Exception e) {
LOG.error("Failed to parse TABLE JSON for {}: {}", questionShortName, e.getMessage());
context.setVariable(questionShortName, Collections.emptyList());
return false;
}
return true;
}
Example of using Thymeleaf contexts for on-the-fly document generation.
The local stack I used for development with: Spring Boot API, Angular frontend, and PostgreSQL.