04/25/2026 updated
100 % available
Backend Engineer | Security Engineer | Platform Engineer
Blitar, East Java, Indonesia, Indonesia
Only remote
Bachelor of Computer ScienceC (Programming Language)PHPSystems EngineeringC++ (Programming Language)DevOpsEmbedded SystemsPostgreSQLBlockchainBackendFintechGolangMicroservices
Backend Engineering with Go and PostgreSQL
Expertise in architecting and maintaining Go/PostgreSQL microservices for high-availability platforms, including PostgreSQL sharding, clustering, and materialized-view optimization to boost service SLA by 37%.
Security Engineering and Offensive Security Assessments
Comprehensive knowledge in end-to-end offensive security assessments, automated SAST pipelines using SonarQube and Checkmarx, and enterprise-wide cybersecurity policy design to eliminate code-level security defects and drive full remediation.
DevOps and Container Orchestration
Proficiency in containerized deployments using Docker and Kubernetes, ensuring consistent and reproducible releases across all environments, as well as centralized logging with Kibana and the ELK Stack.
Programming Languages
Fluency in multiple programming languages, including Go, Python, C, C++, Java, PHP, and Bash, enabling cross-domain development across backend, security, and systems engineering.
CQRS and Microservices Architecture
Application of CQRS patterns to segregate read and write paths for independent scaling, and design of RESTful API-based microservices architectures serving large-scale merchant and fintech platforms.
Blockchain Development
Development of internal blockchain services in C for micro-banking platforms, including genesis block generation using the scrypt key-derivation algorithm and packaging symmetric cipher extensions for Python.
Machine Learning and GPU-Accelerated Computing
Design of Python 3 pre-training pipelines for image datasets and authoring of CUDA/C++ extensions to parallelize GPU-accelerated model training, significantly reducing training time.
Unit Testing and Quality Assurance
Establishment of company-wide unit testing standards using frameworks such as Testify for Go, with full mock coverage to reduce production regression rates and improve release confidence.
Firmware and Embedded Systems Engineering
Engineering of firmware for network SoC hardware to resolve performance bottlenecks, and development of C-based CLI tools to streamline routine operations on proprietary OS environments.
Experience
Professional experience5 - 10 years
Freelancer since2024
Languages
EnglishFluent
Project history
Spearheaded end-to-end offensive security assessments across all internal microservices, surfacing critical vulnerabilities and driving full remediation within 3 months. Audited source code across backend and frontend services using Checkmarx. Deployed SonarQube as an automated SAST gate across all CI/CD containers. Championed enterprise-wide cybersecurity policy design with cross-functional stakeholders.
Architected and maintained Go/PostgreSQL microservices powering a fintech lending platform. Raised service SLA by 37% by re-engineering the PostgreSQL layer with sharding, clustering, and materialized views. Enforced service quality standards by writing exhaustive unit tests using the Testify framework. Orchestrated containerized deployments via Docker and Kubernetes.
Rolled out Kibana-based centralized logging across virtually all backend and frontend services, dramatically improving system observability and incident mean-time-to-detect. Built Polar, an open-source Git pre-commit message validator in Go, standardizing commit discipline across the entire engineering organization.