jundifirdausi (jundifirdausi)

2022: TunaiPay - Secure Fintech & Payment Solutions

TunaiPay is a financial technology solution focused on providing accessible payment and transaction services. The project required high-level security standards and compliance with financial regulations.

Key Contributions:

Ledger System: Developed an immutable ledger system to record every transaction accurately (Double-entry bookkeeping logic).

Fraud Detection Logic: Implemented basic rule-based algorithms to detect suspicious transaction patterns.

Payment Gateway Integration: Connected the platform with major switching networks for bank transfers and e-wallet top-ups.

Security Hardening: Applied encryption and secure token mechanisms (JWT) to protect user financial data.

Tech Stack: ExpressJS, PosgreSQL, Docker, Nginx, Redis

2022: ShowbizDeal - Indonesia's Premier Entertainment Booking Marketplace

howbizDeal is an integrated marketplace platform connecting talents/artists with event organizers and brands. The system digitizes the traditional artist booking process into a seamless, secure, and transparent online transaction.

Key Features Built:

End-to-End Booking Engine: Developed the core transaction flow from talent discovery, negotiation, contract generation, to final settlement.

Secure Payment Gateway: Integrated multi-channel payment gateways with an Escrow system to ensure safety for both Artists and Clients.

Real-time Availability: Built a dynamic scheduling system to manage artist availability and booking slots.

Microservices Ready: Structured the backend to support separate services for user management, transaction, and messaging.

Tech Stack: Node.js (Express), React.js, MySQL, RESTful API, Payment Gateway Integration (Midtrans/Xendit), Git.

2023: TerusLaris.com - B2B2C Digital Goods Warehouse & Distribution Platform

TerusLaris is a digital supply chain platform designed to streamline the distribution of digital goods (pulsa, data packages, vouchers) from aggregators to retailers and end-consumers (B2B2C).

Key Contributions:

Inventory System: Built a robust "Digital Warehouse" system to manage millions of SKU stocks in real-time.

Distribution Engine: Developed the core logic for distributing digital products to thousands of resellers with zero downtime.

Transaction Reliability: Optimized the checkout process to handle high-concurrency transactions during flash sales or promo events.

API Gateway: Created standardized APIs for third-party partners to connect and retrieve stock availability instantly.

Tech Stack: Golang, PostgreSQL, Redis, AWS SQS (for queuing transactions), Docker, Kubernetes.

2024: Bayar Sekaligus (MyTelkomsel App) - Multi-Bill Payment Aggregator

"Bayar Sekaligus" is a flagship feature within the MyTelkomsel ecosystem that allows users to pay multiple bills (Internet, Electricity/PLN, BPJS, PDAM) in a single transaction.

Key Contributions:

System Integration: Successfully integrated multiple biller aggregators into a unified checkout experience.

Complex State Management: Managed the complex logic of "Partial Success/Failure" scenarios when paying multiple providers simultaneously.

High Security: Implemented strict security protocols for handling sensitive user billing data and payment tokens.

User Experience: Delivered a seamless backend response to ensure the frontend (Mobile App) renders bill details under 200ms.

Tech Stack: ECS, SQS, Golang, Node.js, PostgreSQL.

2024: MyTelkomsel Smart Parking (R&D Feature) - IoT & Cashless Solution

Role: Backend Engineer & IoT Integrator Context: Research & Development Project (Fly Indonesia / Telkomsel Innovation)

An innovative R&D initiative integrated within the Telkomsel ecosystem to digitize the urban parking experience. The system allows users to enter and exit parking gates seamlessly using License Plate Recognition (LPR) or RFID, with automatic payments deducted from their Telkomsel/LinkAja balance.

Key Contributions:

IoT Hardware Integration: Built the backend service to communicate with parking gate hardware (controllers) using MQTT Protocol for low-latency response.

Real-Time Processing: Engineered a high-speed transaction engine to ensure the barrier gate opens in under 1 second after payment verification.

Billing System: Integrated the parking duration calculation logic with Telkomsel's billing core for accurate automated deductions.

Prototyping: Successfully led the backend development from Proof of Concept (PoC) to a working pilot implementation.

Tech Stack: Golang (for high-concurrency I/O), MQTT, Node.js, Redis, PostgreSQL.

2025: Indico Engage Platform (Telkomsel Ecosystem) - High Performance Marketing Engine

Developing Indico Engage, a scalable B2B marketing solution platform designed to help digital marketers enhance customer engagement. This platform leverages Telkomsel's massive telecommunications data to provide precise, data-driven marketing insights.

My Key Contributions:

High-Scale Architecture: Designed and implemented a Serverless Architecture (AWS Lambda, SQS, DynamoDB) capable of handling millions of concurrent requests from Telkomsel's user base.

Performance Optimization: Utilized Golang and Redis to ensure low-latency data processing for real-time customer engagement campaigns.

System Integration: Built secure APIs to integrate Telco big data with external B2B client dashboards.

Business Impact: Successfully converted complex data analytics processes into a user-friendly platform that empowers brands to deliver personalized customer experiences.

Tech Stack: Golang, Node.js, AWS Serverless (Lambda, SQS, SNS), DynamoDB, RDS (PostgreSQL), Redis, Docker.