Open to opportunities

Christian Mejia

@christianmejia1

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Software engineer and physicist delivering secure APIs, data pipelines, and feature-flagged services.

Colombia

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What I'm looking for

I’m looking for a team where I can build secure backend services and data pipelines (Kafka/Flink), own API and logging workflows end-to-end, and collaborate using strong engineering practices like CI/CD and testing.

I’m a physicist with approximately four years of experience focused on software development, helping plan, analyze, design, and implement information systems. I identify with responsibility, honesty, excellent interpersonal skills, leadership in team environments, and professionalism.

At La SoftTech, I created new Spring Boot 3 / Java 17 APIs to deliver aggregated metrics and customer/workspace data. I worked on Kafka-based log emission with SLF4J, built a logs repository from scratch, implemented retention (14 days) and email notifications, migrated schemas from MySQL to PostgreSQL, and developed connector recovery automation for “failed” tasks.

I also implemented data processing with Flink 18.0.1 and Flink on Confluent Cloud (joins, JDBC/Kafka/Upsert-Kafka connectors, entity mapping), and validated writes using Databricks and Snowflake connectors. Earlier, at Imagemaker, I refactored NestJS landing services in MongoDB, deployed through Jenkins and Argo with QA validation, integrated feature flags with LaunchDarkly, and delivered OpenAPI contracts and unit tests with Jest.

Experience

Work history, roles, and key accomplishments

NestJS Feature Toggle Refactor

Imagemaker

Feb 2025 - Aug 2025 (6 months)

Refactored a NestJS landing project to record a credit card audit trail in MongoDB and updated a customer information service to mask account numbers. Automated deployments to IST with Jenkins and Argo, implemented LaunchDarkly-backed feature toggles, and delivered OpenAPI-validated endpoints with Jest unit tests.

NestJS Java Spring Boot MongoDB Argo LaunchDarkly OpenAPI Jest

Log & Metrics Engineering

La SoftTech

Aug 2021 - Aug 2024 (3 years)

Built Spring Boot 3 APIs for aggregated metrics and customer/workspace queries, and created Kafka-based log pipelines using SLF4J to emit multi-level logs. Implemented log storage with 14-day retention and email notifications, migrated schemas from MySQL to PostgreSQL, and developed Flink 1.8.0.1 jobs to join Kafka-sourced tables (JDBC, Kafka, Upsert-Kafka) with EC2 JAR deployments and automated c

Java Spring Boot Kafka SLF4J PostgreSQL Apache Flink Flink JPA

Camera Visualization & Support

Pasto Volcanological Observatory OVSP-SGC

Jun 2015 - Aug 2018 (3 years 2 months)

Developed a JavaScript camera visualization system for volcano cameras using index.html and created incidents for a Java-based seismic information processing program. Supported software analysis/data processing and assisted with network maintenance and troubleshooting.

JavaScript HTML Java Data Processing Software Analysis Network Troubleshooting Seismic Visualization