Billisany Akhyar
Backend Engineer
I build scalable backend systems and APIs that perform at scale. From system design to distributed services, I focus on building maintainable, reliable, and production-ready solutions.
6+
Years Experience
20+
Projects Completed
Engineering Philosophy
I'm Billisany Akhyar, a Backend Engineer focused on building scalable backend systems that are reliable, performant, and maintainable. My approach combines deep technical expertise with pragmatic engineering decisions.
I believe great backend engineering is invisible — when systems work seamlessly, users never think about the infrastructure. That's the standard I hold myself to.
Scalability First
Every system I build is designed to grow. Architecture decisions today should support tomorrow's scale.
Clean Boundaries
Well-defined service boundaries and clear contracts make systems maintainable and teams productive.
Observability Driven
You can't improve what you can't measure. Instrumentation and monitoring are first-class concerns.
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Core Expertise
Deep specialization in backend engineering disciplines that power modern systems.
System Architecture
Designing scalable, maintainable systems with clean separation of concerns and resilient communication patterns.
API Development
Building high-performance RESTful and GraphQL APIs with robust authentication, rate limiting, and comprehensive documentation.
Microservices
Decomposing monoliths into independently deployable services with proper boundaries, async communication, and orchestration.
RAG / AI Integration
Integrating retrieval-augmented generation and AI capabilities into production systems with reliability and observability.
Performance Optimization
Optimizing systems for throughput, latency, and resource efficiency through profiling, caching, and architectural improvements.
Observability
Building comprehensive monitoring, logging, and tracing systems to ensure reliability, fast incident response, and data-driven decisions.
Selected Projects
Engineering case studies showcasing system design, architecture decisions, and measurable impact.
RAG/AI Knowledge Platform
Reduced knowledge discovery timeInternal knowledge base platform with AI-powered document search and PRD assistant, enabling teams to find information and generate product documents faster.
Challenge
Large volume of unstructured internal documents made it difficult for teams to find relevant information quickly. Manual PRD writing was time-consuming and inconsistent.
Solution
Built a RAG pipeline with document chunking, embedding generation, and semantic search. Integrated LLM-powered assistant for PRD drafting with context from existing documentation.
Trading Broker Connector Service
Reliable broker integrationIntegration service connecting internal trading platform to external forex broker APIs, handling order routing, signal forwarding, and real-time market data synchronization.
Challenge
Integrating with multiple broker APIs that have different protocols, rate limits, and data formats while ensuring reliable order delivery and consistent state between systems.
Solution
Designed a modular connector architecture with broker-specific adapters, queue-based order routing for reliability, and automated health checks to handle broker downtime gracefully.
Notification Service
Reliable delivery across channelsCentralized multi-channel notification service handling email, push notifications, SMS, and in-app messaging with priority-based delivery.
Challenge
Managing high-volume notifications across multiple channels without message loss, while respecting rate limits, user preferences, and delivery priorities.
Solution
Designed a queue-driven architecture with RabbitMQ for reliable message delivery, Redis for rate limiting and deduplication, and channel-specific adapters for each delivery method.
API Gateway
Unified gateway for all servicesCentralized API gateway using Kong for routing, authentication, rate limiting, and traffic management across multiple backend microservices.
Challenge
Multiple services with inconsistent authentication, no centralized rate limiting, and difficulty managing cross-cutting concerns like logging and request transformation.
Solution
Deployed Kong as the API gateway layer with custom plugins for JWT validation, per-consumer rate limiting, request/response transformation, and centralized logging to ELK stack.
Get the Full Portfolio
All projects with detailed architecture diagrams, tech decisions, and performance metrics — compiled in one document.
Download Portfolio PDFSystems Thinking
How I approach backend system design — service boundaries, async communication, and reliable integrations.
Architecture diagram showing interconnected microservices: API Gateway (Kong) connecting to Auth Service, Trading Service, Notification Service, AI/RAG Service, and infrastructure components like RabbitMQ, PostgreSQL, and Redis.
Request Flow
Stack
Tech Ecosystem
The tools and technologies I work with to build reliable, scalable systems.
Coding Activity
My GitLab contribution over the past year.
Billisany Akhyar
@bilscode
5,080
contributions
206
active days
5,080 contributions in the last year
Engineering Journey
Key milestones in my career building scalable systems and growing as an engineer.
Lead Developer
PT. Monex Investindo Futures
Leading development team and driving technical direction for trading platform systems, AI integrations, and infrastructure improvements.
- Architected Trading Broker Connector Service with modular adapter pattern
- Built RAG/AI Knowledge Platform with LangChain and OpenAI
- Designed centralized Notification Service with RabbitMQ multi-channel delivery
- Implemented Kong API Gateway for unified service routing and auth
- Established code review standards with SOLID principles
- Mentored team on best practices and technical standards
- Defined technical architecture and technology roadmap
Backend Developer
PT. Monex Investindo Futures
Built backend systems for trading platform with microservices architecture, real-time communication, and third-party broker integrations.
- Integrated MetaTrader platform with internal systems
- Implemented microservices with RabbitMQ event-driven architecture
- Built CQRS pattern for cross-database synchronization
- Implemented Redis caching and Docker containerization
- Developed real-time notifications via WebSocket
- Built and consumed REST APIs for internal and external services
Freelance Full Stack Developer
PT. Astra Otoparts
Designed and developed web applications for internal business processes, operational workflows, and reporting systems.
- Built 2 web applications from scratch using Laravel
- Designed database schema and REST API architecture
- Implemented role-based access control and authentication
- Improved legacy systems with better code structure and performance
Web Developer
PT. Cazh Teknologi Inovasi
Developed multiple SaaS web applications with multi-tenant architecture, cloud deployment, and third-party API integrations.
- Published 10+ web applications to production
- Built 3 multi-tenant SaaS systems with Laravel
- Configured cloud servers and deployment pipelines
- Designed client-server architecture with REST APIs
- Integrated third-party payment and messaging APIs
Education
Academic foundation that shaped my engineering thinking.
Bachelor of Informatics
2018 - 2022Institut Teknologi Telkom Purwokerto · Informatika · GPA 3.73
Studied core computer science fundamentals including data structures, algorithms, database systems, and software engineering. Built several projects involving web applications, API design, and basic distributed computing concepts.
Vocational High School
2015 - 2018SMK Telekomunikasi Telesandi Bekasi · Software Engineering
Learned programming fundamentals, object-oriented design, and software development lifecycle. Gained hands-on experience building applications and understanding system architecture from an early stage.
Let's Build Something
Have a project that needs scalable architecture? Let's talk about how I can help.
Reach out via email
The best way to reach me. I'll get back to you within 24 hours.
billisanyakhyar24@gmail.com