Faisal Affan

Lead Solutions Architect driving resilient engineering across Bank Mandiri's digital ecosystem (Livin' Merchant & Kopra Wholesale), powering 15M+ merchants with target throughput of ~210,000 TPS.

• Active-Active Multi-Site Architecture: Architected dual-datacenter active-active infrastructure with automated GTM failover and sub-second HA, eliminating single points of failure for the nationwide merchant platform.
• Real-Time Event Streaming: Introduced a Kafka stretch cluster enabling near real-time data sync across sites with 99.9% target availability under peak loads.
• Enterprise Observability: Built a unified LGTM & VictoriaMetrics telemetry stack, cutting incident resolution time by 87% (from 2 hours to under 15 minutes).
• Core & Payment Ecosystem Integration: Established integration between merchant services, core banking, Kopra wholesale, and payment rails (QRIS & Card Acquiring), accelerating settlement to <5 minutes.

Tech Stack: Kubernetes, OpenShift, Kafka, Redis, PostgreSQL, Grafana, Loki, Tempo, VictoriaMetrics, MinIO, Azure, Go

Primary backend architect and lead developer for two high-impact, mission-critical mobile banking and financing products serving 4.1M+ customers and 10K+ field agents.

• Project Tepati (Micro-Finance Platform): Built the entire backend in 30 days, cutting bandwidth by 78% via custom delta sync, and reducing loan approvals from 7 days to under 24 hours.
• Project Sitepat (Customer Mobile Banking): Designed secure API gateways and legacy integration, bridging modern REST APIs to a 1987 core banking system via a custom ISO 8583 bridge with <2s balance inquiries.
• Operational Excellence: Maintained 99.7% uptime during maintenance windows and delivered 595 story points across 32 sprints (2 sprints ahead of schedule).

Tech Stack: Go, gRPC, Kafka, AMQ, MQTT, ISO 8583, MongoDB, SQL Server, Redis, Docker, OpenShift, AWS, ELK, Grafana, Prometheus, FCM

Frontend engineer for Prospera — next-gen Core Banking dashboard revamping Temenos T24 into a modern stack. Used by tellers, loan officers, and business teams across ~2,000 branches processing ~1M transactions/day.

• Migrated 6+ legacy T24 workflows into a unified Vue.js SPA
• Built reusable component library adopted across multiple squads
• Delivered companion React Native app for field officers

Tech Stack: Vue.js, React Native, HTML/CSS, REST/JSON, Git, Docker, OpenShift

Built the mobile and frontend layer of an edge-to-cloud mining platform managing hundreds of heavy units across 3 mine sites in Kalimantan.

• Tracked heavy units live with real-time GPS rendering on Mapbox GL
• Caught 3 fuel thefts (650L) via algorithmic fuel monitoring UI
• Slashed safety incident reporting from 24–48 hours to under 30 minutes
• Unified 3 mine sites into a single real-time command dashboard

Tech Stack: Flutter, React, React Native, Mapbox GL, WebSocket, Go, gRPC, MQTT, Modbus TCP, PostgreSQL, InfluxDB, Redis, Docker, Terraform

Delivered high-performance backend systems and interactive frontends for enterprise clients in cyber insurance and IoT analytics.

• Petrosea Minerva (IoT Platform): Scaled message ingestion 10× (5K → 50K events/sec) at <50ms latency, using Bloom filters to drop duplicate data to <0.01%, and cutting geofence breach detection to <2s.
• IAG Cybera360 (Cyber Insurance): Digitized manual risk assessment for APAC SMEs, building a Vue/Nuxt dashboard and custom Cyber Risk Scoring Engine in Go that cut assessment queries from 100+ to under 30.
• Third-Party Integrations: Integrated security APIs including UpGuard, Acronis, and RHCS into core workflows.

Tech Stack: Go, gRPC, Kafka, MQTT, InfluxDB, PostgreSQL, PostGIS, Redis, Protobuf, Nuxt.js, Vue.js, D3.js, Node.js, WebSocket, Docker

Engineered robust data pipelines and analytics solutions as part of EACIIT's enterprise big data engineering team.

• Built production-grade ETL data processing modules in Go
• Developed interactive web-based reporting dashboards for key clients
• Designed high-performance MongoDB aggregation pipelines

Tech Stack: Go, MongoDB, JavaScript, HTML/CSS, Git

Independent engineering consultancy delivering end-to-end applications and cloud infrastructure for paying clients across Indonesia.

• Delivered production apps (Next.js, Nuxt.js, Go, Laravel)
• Shipped cross-platform mobile apps (Flutter, React Native)
• Managed multi-cloud clusters (AWS, GCP, DO) via GKE & Istio
• Hardened infrastructure security with HashiCorp Vault
• Built automated CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins)

Tech Stack: Go, JS/TS, PHP, Next.js, Nuxt.js, React, Vue.js, Flutter, React Native, Laravel, Express, AWS, GCP, DO, K8s, Istio, Terraform, Ansible, Jenkins

Customer-facing mobile banking app with 10K+ downloads. Electronic channel service by BTPN Syariah.

• Lead architect designing the API Gateway, secure core banking integrations, and transaction processors.
• Successfully bridged modern microservices APIs to legacy core banking via a custom ISO 8583 bridge.
• Introduced MQTT/AMQ for offline-capable usage in remote areas, Kafka for async APIs, and GRPC for inter-service communication.
• Delivered 595 story points across 32 sprints — completed 2 sprints ahead of the 34-sprint estimate.
• Stack: Go, Flutter, SQL Server, MongoDB, Redis, Firebase, Kafka, Kubernetes.

Tech Stack: Go (Golang), Flutter, Kafka, Kubernetes

Links:Website, Demo

Internal acquisition tool for BTPN Syariah — electronic channel for financing distribution services.

• Built end-to-end field agent acquisition platform handling surprise visit flows, dual-control approval, and survey/interview pipelines.
• Solved offline usage in remote areas via MQTT/AMQ, async APIs via Kafka, persistent image storage via AWS S3.
• Implemented GRPC for inter-service communication, Firebase for push notifications, and eMeterai for digital signatures.
• Stack: Go (Fiber), React Native, Next.js 14, SQL Server, MongoDB, Redis, AWS S3, Kubernetes (AWS ROSA).

Tech Stack: Go (Golang), React Native, Kubernetes, Kafka

Multi-tenant cloud-native Point of Sale (POS) system for Southeast Asian SMEs.

• Designed and engineered a highly resilient microservices architecture for multi-tenant SME retail systems.
• Built high-performance Go backend microservices, Next.js portal dashboard, and cross-platform Flutter POS application.
• Orchestrated containerized deployment on Kubernetes (K8s) featuring multi-tenant database schema isolation.
• Stack: Go, Next.js, Flutter, PostgreSQL, Redis, Kubernetes.

Tech Stack: Go (Golang), Next.js, Flutter, Kubernetes

Links:Code

Multi-tenant Enterprise Resource Planning (ERP) platform for global SMEs.

• Architected modular ERP systems including inventory control, sales invoicing, dynamic reporting, and payroll modules.
• Designed backend microservices in Go, web administration interface using Next.js, and a mobile client app in Flutter.
• Implemented auto-scaling container deployments with secure tenant database isolation.
• Stack: Go, Next.js, Flutter, PostgreSQL, Docker, Kubernetes.

Tech Stack: Go (Golang), Next.js, Flutter, Kubernetes

Links:Code

First corporate venture into cyber insurance space — incubated within IAG Firemark. Online platform to market, sell, and manage cyber insurance.

• Delivered full-stack cyber insurance platform from onboarding and risk-assessment questionnaires through checkout.
• Closed 4 deals in the first month of launch with ERGO broker network.
• Gained recognition from Munich RE, Enterprise SG, SG Innovate, AustCyber, and Austrade.
• Stack: Go (Echo), React Native, Nuxt 2, PostgreSQL, MongoDB, Redis, NATS Streaming, Docker, Kubernetes.

Tech Stack: Go (Golang), Nuxt, PostgreSQL, Kubernetes

NewMinerva — coal mining enterprise system for Petrosea, handling end-to-end mining operations.

• Developed both frontend and backend for the next-generation coal mining management platform.
• Worked across the full stack delivering features for mine operations tracking and reporting.
• Stack: Go (Echo), React Native, Nuxt 2, PostgreSQL, MongoDB, Redis, NATS Streaming, Docker, Kubernetes.

Tech Stack: Go (Golang), Nuxt, PostgreSQL, Kubernetes

Backend system working directly with the CEO to gather and implement business flow requirements.

• Built backend services from the ground up, reporting directly to the CEO for business flow discovery.
• Designed and implemented REST APIs to power the core business logic.
• Stack: Node.js, Express, PostgreSQL, Docker.

Tech Stack: PostgreSQL, REST APIs, Docker

Real estate CRM and property sell & rent platform.

• Build end-to-end CRM with drag-and-drop lead pipelines, customer logs, and transaction status.
• Active live deployment with optimized database indexing and sub-second querying.
• Stack: Next.js, TypeScript, PostgreSQL.

Tech Stack: Next.js, PostgreSQL, TypeScript

Links:Demo, Code

Interactive personal finance reality check and cash flow projection tool.

• Developed a finance tool providing realistic salary sufficiency assessments against cost-of-living indicators.
• Designed a sleek, interactive input flow for financial data and custom projection modeling.
• Stack: Next.js, React, Tailwind CSS, TypeScript.

Tech Stack: Next.js, TypeScript, Tailwind CSS

Links:Code

Elegant Pomodoro focus and productivity mobile application.

• Created a sleek Pomodoro timer mobile application designed to optimize productivity and task focus.
• Published on the Apple App Store featuring smooth micro-animations and intuitive gesture navigation.
• Stack: Flutter, Dart, Swift, iOS.

Tech Stack: Flutter, Dart, Swift

Links:Demo

Focused on advanced software engineering, database management systems, cloud computing architectures, and enterprise systems analysis.

Specialized in practical web development, computer networking, relational database configurations, and operating system fundamentals.