HomeAboutExperienceSkillsProjectsContact
Available for opportunities

$ whoami

Johan Fernando
Garcia Casas

Integration Engineer with 8+ years building and operating enterprise middleware on IBM Integration Bus and IBM MQ for Tier-1 banks processing 500K+ daily transactions.

Atlanta Metro, GA · open to relocation · authorized to work in the U.S. — no sponsorship required

IBM MQIIB/ACEESQLDFDLDataPowerDockerOpenShiftAWSPythonCOBOL
Get in TouchResumeGitHub
portfolio.tsx
1
scroll

# About.system

System Profile

user_profile.log

OPERATOR

Johan Fernando Garcia Casas

Integration Engineer

location:Atlanta, GA
origin:Colombia
status:OPEN
auth:US — no sponsorship

$ cat mission.txt

My career began in Colombia with COBOL mainframes and AS/400 migrations — foundational work on mission-critical systems where reliability is non-negotiable.

I moved into IBM middleware and spent 8+ years building and operating enterprise integration on IIB (v9/v10) and IBM MQ for Tier-1 banking environments processing 500K+ daily transactions — ESQL message flows, DFDL/XML message models, queue manager administration, clustering and channel security, and service governance through DataPower and WSRR.

Now based in Atlanta, I pair that enterprise background with cloud-native delivery: IIB workloads containerized on Docker and OpenShift, CI/CD in Azure DevOps, Jenkins and GitHub Actions, and my AWS Solutions Architect — Associate certification in progress.

8+

Years Experience

500K+

Daily Transactions

Tier-1

Banking Clients

4

Live Products

languages.config
Spanish
Native
English
Professional

$ cat core_strengths.md

  • ▸ESQL message flow development
  • ▸IBM MQ administration & clustering
  • ▸DFDL / XML message modeling
  • ▸Service governance (DataPower, WSRR)
  • ▸Cloud-native containerization
  • ▸CI/CD pipeline automation

$ git log --stat --oneline

Career History

commit f9d4e8c
f9d4e8cmain2025 — Present

Independent Builder — AI-Assisted Products

Portfolio Products — johangarcia.dev

  • ▸Designed and shipped 4 live web products using AI-assisted development with Claude Code: DFDL Parser, COBOL Copybook Mapper, Docker Compose Gen, and RetoHabitos.
  • ▸Applied integration-domain expertise to specify and validate developer tools that parse COBOL copybooks (PIC clauses, COMP-3, offsets) and DFDL schemas.
  • ▸Own the full product lifecycle: requirements, iteration, Vercel deployments, custom domains, transactional email (Resend), and database/auth setup (Supabase).
Claude CodeAI-Assisted DevVercelSupabaseResend
32 files changed, +610 -95
commit a3f7c1d
a3f7c1dchore/operationsNov 2023 — Present

Operations Manager

Belen de la Cruz Empanadas & Pastries — Atlanta, GA

  • ▸Non-technical role held during U.S. relocation; technical skills maintained through independent projects.
  • ▸Run end-to-end daily operations for 70–150 daily customers — staffing, scheduling, vendor relations and customer experience.
  • ▸Own P&L accountability: cash reconciliation, weekly sales reporting and cost control.
OperationsP&LProcess Optimization
4 files changed, +45 -8
commit 9c2b71e
9c2b71echore/relocationJan 2022 — Nov 2023

U.S. Relocation — Career Transition

Independent — Atlanta, GA

  • ▸Relocated from Colombia to the United States and completed the U.S. work authorization process.
  • ▸Worked independently across construction, hospitality and food production while establishing residency, progressing into a full-time operations management role in Nov 2023.
RelocationUS Work Authorization
2 files changed, +24 -5
commit b8e2f4a
b8e2f4afeature/cloud-nativeMay 2021 — Jan 2022

Integration Developer

PRAGMA S.A. — Colombia

  • ▸Designed, developed and tuned IBM Integration Bus (IIB v10) message flows in ESQL for high-volume banking transaction processing.
  • ▸Built and maintained message models (DFDL / XML) and mapping logic across SOAP, REST and JMS interfaces for core banking services.
  • ▸Containerized IIB integration nodes with Docker and deployed to OpenShift, standardizing dev, QA and production environments.
  • ▸Implemented CI/CD pipelines in Azure DevOps and GitHub Actions, reducing manual deployment effort and improving release reliability.
  • ▸Governed services through IBM DataPower and WSRR; validated behavior with unit and regression testing across SOAP, REST and JMS.
  • ▸Migrated IIB v10 flows toward IBM API Connect, running container deployments on Docker with Jenkins, Azure DevOps and OpenShift.
IIB v10ESQLDFDLDockerOpenShiftAPI Connect
12 files changed, +230 -45
commit c4d9e7b
c4d9e7bfeature/enterpriseNov 2019 — May 2021

Expert Engineer 3

SOPHOS SOLUTIONS S.A.S — Colombia

  • ▸Delivered and maintained IIB (v9/v10) integration solutions for multiple banking clients in parallel, including ESQL flow development, message modeling and production troubleshooting.
  • ▸Designed and administered IBM MQ queue managers, queue topologies, clusters and channels for reliable asynchronous communication across distributed banking systems.
  • ▸Exposed and consumed services over SOAP, REST, TCP/IP and JMS, ensuring interoperability across heterogeneous platforms.
  • ▸Administered IBM DataPower and WSRR, optimizing service lifecycle, policy enforcement and security gateway configuration.
IIB v9/v10IBM MQMQ ClusteringDataPowerWSRR
18 files changed, +340 -67
commit d1a6c3f
d1a6c3ffeature/ibm-coreFeb 2017 — Nov 2019

Application Programmer

IBM — Colombia

  • ▸Built IIB (v9/v10) integration services in ESQL for Tier-1 banking environments processing 500K+ daily transactions.
  • ▸Developed IBM MQ message flows, queues and channel configurations supporting high-availability, low-latency inter-system communication.
  • ▸Configured and governed services through IBM DataPower and WSRR, enforcing security policies and service contracts.
  • ▸Mentored junior developers and established integration patterns and coding standards adopted across the team.
  • ▸Led multidisciplinary teams designing and maintaining complex, enterprise-aligned integration architectures.
IIB v9/v10ESQLIBM MQDataPowerWSRRTeam Lead
24 files changed, +520 -130
commit e5b8d2a
e5b8d2afeature/mainframeMar 2014 — Nov 2016

Software Analyst

FASOFTCOL E.U. — Colombia

  • ▸Migrated AS/400 applications to COBOL batch processing and designed JCL scripts automating batch job scheduling.
  • ▸Built ETL pipelines loading flat files (CSV, TXT) into DB2 for reliable reporting workflows.
COBOLAS/400JCLDB2ETL
11 files changed, +180 -42

# Skills.json

Tech Universe

skills_constellation.exe — hover to explore

// Integration & Middleware

  • IBM MQ
  • IBM Integration Bus (v9/v10)
  • IBM App Connect Enterprise
  • IBM DataPower
  • IBM WSRR
  • IBM API Connect

// Messaging & Services

  • ESQL
  • MQSC / Message Flows
  • DFDL & XML Message Models
  • SOAP · REST · JMS
  • XSLT / JSON
  • MQ Clustering, Channels, SSL/TLS

// Platforms & Cloud

  • Docker
  • OpenShift
  • Kubernetes
  • AWS
  • Linux

// CI/CD & Tooling

  • Azure DevOps
  • Jenkins
  • GitHub Actions
  • Git

// Languages & Data

  • Java
  • Python
  • COBOL
  • SQL
  • DB2

// AI-Assisted Delivery

  • Claude Code
  • Next.js
  • Vercel
  • Supabase
  • Resend
certifications.log
▸

AWS Certified Solutions Architect — Associate (SAA-C03)

Amazon Web Services

In progress — 2026
✔

AWS Technical Professional

Amazon Web Services

2021
✔

B.Sc. Software Engineering

Universidad Central de Colombia — Bogotá

2011 — 2018

$ ls -la ~/projects

Projects

Ideas and tools I am building to solve real-world problems.

dfdl-parser

DFDL Parser

Live

A web-based tool for parsing flat files and BLOBs into structured data using editable DFDL schemas. Supports fixed-length and delimited formats, real-time error detection, and export to JSON or DFDL XML.

Next.jsTypeScriptDFDLIBM IIB/ACEParsing
cobol-copybook-mapper

COBOL Copybook Mapper

Live

Map COBOL flat file records against a copybook. Parses PIC clauses (X, 9, COMP-3, BINARY), calculates field offsets, and visualizes every byte color-coded. Edit the copybook inline — add, move, delete fields or FILLERs — and download the modified copy.

Next.jsTypeScriptCOBOLIBM IIB/ACEParsing
docker-compose-gen

Docker Compose Gen

Live

Visual generator for docker-compose.yml files. Select from 19 pre-configured services (databases, cache, messaging, monitoring), configure ports, volumes and env vars, then export your compose file instantly.

Next.jsTypeScriptDockerDevTools
retohabitos

RetoHabitos

Live

Crea retos de hábitos y desafía a tus amigos, pareja o conocidos — o a ti mismo. Seguimiento diario de progreso, rachas y notificaciones para mantener la motivación. Construida con Claude Code.

Next.jsSupabaseResendVercelProductivity

// more projects loading...

Coming soon

$ ./contact.sh

Get in Touch

contact_info.json

{

"email": "jfgc1394@gmail.com",

"location": "Atlanta Metro Area, GA",

"work_authorization": "US — no sponsorship required",

"relocation": "open",

"linkedin": "linkedin.com/in/njogaca",

"github": "github.com/njogaca"

}

I am open to new opportunities in integration engineering and cloud-native development. I welcome the opportunity to connect and discuss how my experience can contribute to your team.

sendMessage.ts
// Fill in the fields and run the script
$ chat