Hey, I'm Miftakhul Aziz — Software Engineers
Senior Backend Engineer with 5+ years of experience building scalable, secure, and high-performance backend systems across banking, fintech, healthcare, supply chain, and data inte…
Senior Backend Engineer with 5+ years of experience building scalable, secure, and high-performance backend systems across banking, fintech, healthcare, supply chain, and data intelligence domains.
Currently working at Bank Saqu (Part of Astra Group), focusing on Open API platforms for Account & Payment, Onboarding, Direct Debit, and WebView systems.
Strong expertise in Java and Go, microservices architecture, distributed systems, and cloud-native development. Proven ability to own backend services end-to-end, from system design and implementation to production support, while collaborating effectively in fast-paced, cross-functional environments.
Work Experience
- Design, develop, and own scalable backend services for core banking ecosystems, including Open APIs for Account & Payment, Onboarding, Direct Debit, and WebView systems.
- Build secure, high-performance RESTful APIs using Spring Boot, ensuring compliance with banking standards and security requirements.
- Implement transactional workflows with idempotency handling, callback orchestration, and failure recovery to ensure data consistency across distributed services.
- Lead backend feature development from technical design to production release.
- Perform deep root cause analysis on production and non-production incidents.
- Manage inter-service API dependencies across multiple squads.
- Execute comprehensive testing across DEV, SIT, and UAT environments.
- Apply Git Flow best practices for version control and controlled releases.
JavaSpring BootSpring FrameworkSpring WebFluxSpring Data JPAPostgreSQLRedisGCPMicroservicesDesign PatternsOOPMockitoGitLabJIRA- Architect and engineer scalable backend services for mobile, iOS, and web platforms.
- Enhance and extend RESTful APIs to meet evolving product requirements.
- Led development of backend payment services integrating with external payment gateways.
- Built notification systems (email) and callback orchestration for transactional integrity.
- Analyze, reproduce, and resolve complex bugs across the development lifecycle.
- Strengthen unit testing coverage to meet Sonar quality standards.
- Implement centralized logging using Log4j2 or Lombok.
- Conduct code reviews and contribute to software architecture design.
JavaMicroservicesAWSMongoDBReactive ProgrammingSpring BootSpring WebFluxSpring Data MongoMockitoJUnit 5ReactorAWS CloudWatchJIRAMar 2022 – Jul 2023 · South Jakarta, Indonesia
Software Engineer Backend
PT. Advotics Technology Global- Develop ETL solutions for data migration from OLTP to OLAP systems.
- Design and implement RESTful APIs for internal and external consumers.
- Enhance existing APIs to support new features and integrations.
- Perform bug analysis and resolution across all environments.
- Engineer robust unit tests using Mockito and JUnit.
- Build scheduled reporting systems using crontab.
- Optimize SQL queries and database performance.
- Apply clean architecture and clean code principles.
- Manage feature deployment across environments.
JavaSQLPythonBashHibernateJPAQuery DSLElasticsearchAWSSpring BootReactive ProgrammingRedis- Develop data cleaning services using Python for CSV and Excel processing.
- Engineer Social Network Analysis (SNA) solutions using machine learning.
- Build data crawling services with Apache Kafka for real-time streaming.
- Design data migration services to Elasticsearch (raw & clean indexes).
- Develop RESTful APIs using Spring Boot backed by Elasticsearch.
- Deploy services to production with monitoring and Telegram alerting.
- Maintain layered architecture for scalability and maintainability.
JavaPythonSpring BootKafkaElasticsearchKibanaHadoopApache SparkMachine LearningJan 2020 – Apr 2020 · Lampung, Indonesia
Data Science Laboratory Assistant
Sumatera Institute of Technologies- Deliver practicum materials covering data analysis, machine learning, and deep learning.
- Develop Python-based data science learning modules.
- Guide students in machine learning modeling (classification, clustering).
- Provide consultation for student data science projects.
PythonJupyterLabPandasNumPyAnacondaScikit-LearnDarknetCNNAug 2019 – Dec 2019 · Lampung, Indonesia
Internet of Things Laboratory Assistant
Sumatera Institute of Technologies- Design and implement embedded systems using C programming.
- Deliver IoT practicum materials using Arduino and NodeMCU.
- Teach cloud computing concepts using Google Cloud Platform.
- Mentor students on IoT projects.
CArduinoArduino IDENodeMCUGCPSensor Modules
Technical Skills
Key technologies I use to design, build, ship, and operate backend systems.
Programming Languages
JavaGolangTypeScriptJavaScriptPythonBashKotlinSolidityMove
Backend & Architecture
Spring BootSpring CloudMicroservices ArchitectureRESTful APIsReactive ProgrammingClean & Hexagonal ArchitectureDomain-Driven Design (familiarity)Event-Driven ArchitectureAPI Gateway PatternDistributed SystemsOOPSOLID PrinciplesGo (Gin, net/http, Echo – familiarity)GORMSQLCGo ModulesConcurrency (Goroutines, Channels)
Database & Messaging
PostgreSQLMySQLMariaDBMongoDBRedisElasticsearchApache KafkaQuery OptimizationIndexingTransactions & Isolation Levels
Cloud & DevOps
AWS (EC2, S3, RDS, CloudWatch, IAM)Google Cloud PlatformDockerCI/CD PipelinesSecrets Management
Observability & Monitoring
ELK StackPrometheus (familiarity)OpenTelemetry (familiarity)Distributed TracingAlerting & Incident Monitoring
Testing & Quality
JUnitMockitoGo Testing FrameworkTDDUnit & Integration TestingSonar
Security
JWT AuthenticationRBACAPI Security Best PracticesIdempotency & Replay Protection
Tools
GitHubGitLabBitbucketSwagger/OpenAPIPostmanJiraConfluence
Miftakhul consistently delivers backend features end-to-end with strong ownership, clean design, and reliable production support.
Former Teammate
Backend Engineer
Strong at root-cause analysis and building secure, scalable APIs—great collaborator across squads and environments (DEV/SIT/UAT).
Engineering Peer
Software Engineer
Clear communicator with solid fundamentals in distributed systems, testing, and pragmatic engineering trade-offs.
Tech Lead
Backend Lead
Frequently Asked Questions
Answers to common questions about my work and focus areas.
Backend engineering with a focus on Java (Spring Boot/WebFlux) and Golang.
I'm especially interested in microservices, distributed systems, API security, and reliability.
Open API platforms for banking (account & payment), onboarding flows, direct debit, callback orchestration, ETL pipelines, data crawling/streaming, and search systems (Elasticsearch).
I regularly work across DEV / SIT / UAT and follow controlled release practices (including Git Flow where applicable), with a strong emphasis on testing and observability.