Backend Engineer

Faishal
Zaka

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About

Backend
Engineer

Backend Engineer with 6+ years of experience building scalable systems and automating complex business workflows in fintech environments. Specialized in designing workflow-driven systems (BPMN, SpiffWorkflow) and backend services using Python (FastAPI, Django), enabling business process automation and improving operational efficiency.

Key Achievements

BPMN Workflows

Designed and implemented BPMN-based workflow automation for borrower and loan onboarding (LOS), reducing manual intervention and improving processing efficiency

60-70% Faster

Reduced onboarding processing time by ~60–70% through automation of credit decision workflows

Credit Scoring

Built credit scoring models using alternative data, improving loan qualification and collection effectiveness

Low-code Tools

Developed low-code automation tools enabling faster iteration of business processes

Background

With a unique background in Astronomy, I bring analytical thinking and curiosity to every challenge.

At a Glance

6+

Years

60-70%

Efficiency

10+

Projects

Experience

Where I've
worked

August 2024 – Present

Backend Engineer

PT. Impact Credit Solutions (Nikel)

  • Designed and implemented workflow-driven business processes using SpiffWorkflow (BPMN), reducing borrower and loan onboarding processing time by ~60–70%.
  • Built and integrated backend services (Python, Django, FastAPI) to support workflow execution and business rule orchestration.
  • Developed a low-code automation engine using Python and Dramatiq, enabling non-engineering teams to configure business workflows faster.
December 2021 – August 2024

Backend Engineer | Innovation - Strategy

PT. Sejahtera Lunaria Annua (KoinWorks)

  • Built end-to-end internal products to enable new fintech business opportunities and improve lending operations.
  • Developed credit scoring models (XGBoost) using alternative data (ecommerce), improving loan qualification and collection effectiveness.
  • Designed data pipelines using AWS Lambda and Step Functions to process rejected loan users and generate alternative loan offerings.
November 2018 – December 2021

Back End Developer

PT. Fairtech Digital Indonesia

  • Utilized Grails Framework for web applications and ElasticSearch to enhance search capabilities.
  • Contributed to major web projects including Canon Asia, Michelin Guide, and Hong Kong Tourism Board.
Skills

Tools I
use daily

Languages

PythonGolangJavaScriptTypeScript

Backend

FastAPIDjangoNode.jsSpiffWorkflowDramatiq

Cloud & Data

AWS LambdaStep FunctionsETLPostgreSQLMySQL

Search & APIs

ElasticSearchGraphQLGit

Workflow & AI

BPMNXGBoostCredit Scoring
Projects

Featured
work

COVID-19 Data Modeling

Analyzed community mobility and weather variability using Random Forest and XGBoost.

PythonXGBoostData Science

Social Media Automation

Developed sentiment analysis tools and social media automation using Python and ADB.

PythonADBNLP
Contact

Let's
connect

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