heysony.dev
Technical Advisor & Solution BuilderAvailable Worldwide

Enterprise software that solves real business problems

Technical advisor and solution builder with 10+ years turning enterprise operations into reliable software — digital transformation, AI automation, cloud architecture, and modern web applications.

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AI & Digital TransformationEnterprise SystemsCloud ArchitectureModern WebBusiness Intelligence
selected work
Toko Cung — Retail Digital Transformation & Business Intelligence

End-to-end digital retail ecosystem for sales, inventory, customer experience, and business intelligence.

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HSES App — Enterprise Safety Operations & Cloud Engineering

Digitalizing field safety operations, hazard reporting, and commissioning workflows for enterprise-scale operations.

Read the case study
KIMPER — Enterprise Identity, Competency & Workforce Access Management

Enterprise workforce identity, competency, licensing, and access management platform for large-scale mining operations.

Read the case study
OneApps — Enterprise Mobility & Transportation

Centralized enterprise transportation platform for car booking, shuttle services, and scheduled employee mobility.

Read the case study
10+yrs
Years Experience
20+
Projects Delivered
Enterprise
Scale Systems
Millions
of Transactions

01 · About

Engineering that earns executive trust

I design and ship production systems for organizations that cannot afford downtime, guesswork, or fragile architecture. My work sits at the intersection of product clarity, system design, and measurable business outcomes.

01

Clarity over cleverness

Readable architecture and intentional abstractions beat clever one-liners every time.

02

Business-first engineering

Every technical decision maps back to throughput, reliability, cost, or user time saved.

03

Enterprise resilience

Audit trails, permissions, and failure modes are first-class concerns — not afterthoughts.

04

Crafted interfaces

Internal tools deserve the same polish as consumer products. Trust is designed.

02 · Tech stack

Tools chosen for reliability and leverage

A curated stack for enterprise systems — not a laundry list. Every layer is selected for clarity, maintainability, and production readiness.

Frontend

04
  • React
    Component systems & design systems
  • Next.js
    App Router, SSR, edge-ready apps
  • Flutter
    Cross-platform enterprise mobile
  • Tailwind
    High-velocity UI systems

Backend

03
  • NestJS
    Modular APIs & domain services
  • Laravel
    Robust business backends
  • Node.js
    Event-driven services & tooling

Database

03
  • PostgreSQL
    Relational integrity at scale
  • MySQL
    Transactional workloads
  • SQL Server
    Enterprise data platforms

Cloud

04
  • Docker
    Portable deployment units
  • GCP
    Cloud-native infrastructure
  • Nginx
    Edge routing & reverse proxy
  • Cloudflare
    CDN, WAF, zero-trust edges

AI

03
  • OpenAI
    LLM workflows & assistants
  • Claude
    Agentic reasoning systems
  • Cursor
    AI-native development loops

Automation

01
  • Pipelines
    Ops pipelines & workflow engines

03 · Featured projects

Case studies, not screenshots

Each engagement is documented as an engineering narrative — problem framing, architecture, contribution, and measurable outcomes.

Toko Cung — Retail Digital Transformation & Business Intelligence
Retail Digital Transformation & Business Intelligence2024

Toko Cung

End-to-end digital retail ecosystem for sales, inventory, customer experience, and business intelligence.

Retail OperationsBusiness IntelligenceCustomer ExperienceAI
Read the case study
HSES App — Enterprise Safety Operations & Cloud Engineering
Enterprise Safety Operations & Cloud Engineering2023

HSES App

Digitalizing field safety operations, hazard reporting, and commissioning workflows for enterprise-scale operations.

Safety OperationsCloud EngineeringFlutterAWS
Read the case study
KIMPER — Enterprise Identity, Competency & Workforce Access Management
Enterprise Identity, Competency & Workforce Access Management2023

KIMPER

Enterprise workforce identity, competency, licensing, and access management platform for large-scale mining operations.

IdentityCompetencyEligibilityOffline-first
Read the case study
OneApps — Enterprise Mobility & Transportation
Enterprise Mobility & Transportation2022

OneApps

Centralized enterprise transportation platform for car booking, shuttle services, and scheduled employee mobility.

Car BookingShuttleSchedulingEnterprise Integration
Read the case study

04 · Architecture

How I Design Systems

A pragmatic enterprise topology — clear boundaries, observable flows, and interfaces that scale with the business.

Requests enter through the edge, move across stateless services, and land in a durable data tier. Each boundary owns one job and one failure mode, so a bad deploy never cascades all the way to the client.

MicroserviceFrontendBackendDatabaseCloudAPIAuthenticationStorageQueueMonitoring
L1
Client
React · Next.js · Flutter
L2
Edge & Gateway
Auth · Rate limits · Routing
L3
Backend Services
NestJS · Node · Laravel · Queues
L4
Data
PostgreSQL · Redis · Object store

05 · Timeline

Career, projects, and milestones

An interactive history of delivery — from early platforms to enterprise-scale systems.

  1. 2024project

    Lead Full Stack Engineer

    Enterprise Commerce Initiatives

    Architected Toko Cung — a high-integrity POS and inventory platform spanning FIFO costing, wholesale, and analytics.

  2. 2023career

    Digital Transformation Engineer

    Industrial & Enterprise Clients

    Delivered HSES digitalization and KIMPER identity/licensing platforms for multi-department enterprise use.

  3. 2022project

    Mobile + API Systems

    Workplace Platforms

    Shipped One Apps vehicle booking with Flutter clients and multi-level approval workflows.

  4. 2016–nowachievement

    10+ Years Shipping Production Systems

    Career Milestone

    From early web platforms to enterprise-scale transaction systems — continuously owning delivery from architecture to UI.

  5. Ongoingachievement

    AI-Augmented Delivery

    Engineering Practice

    Integrating OpenAI, Claude, and Cursor into development and product automation loops without sacrificing engineering rigor.

06 · Skills

Experience levels, not vanity percentages

Capability signaled by depth of ownership — Expert ships architectures, Advanced owns features end-to-end, Intermediate contributes confidently.

Expert

05

Ships architectures

  • System ArchitectureEngineering
  • Next.js / ReactFrontend
  • NestJS / Node.jsBackend
  • PostgreSQL / SQL DesignData
  • Enterprise WorkflowsDomain

Advanced

05

Owns features end-to-end

  • LaravelBackend
  • FlutterMobile
  • Cloud & DevOpsInfrastructure
  • AI AutomationAI
  • Product UX for Ops ToolsDesign

Intermediate

02

Contributes confidently

  • ObservabilityInfrastructure
  • Data PipelinesData

07 · Testimonials

Trusted by technical leaders

Feedback from CTOs, engineering managers, and product leads who needed systems that hold up under real operational pressure.

“Sony translates messy operational reality into software leadership can trust. The POS and inventory work didn't just ship — it changed how we run the business.”

ROA. Prasetyo
CTO · Retail Operations Group

“Rare combination of domain empathy and architectural discipline. HSES felt like a product, not an internal tool hacked together under pressure.”

ISM. Handayani
Engineering Manager · Industrial Safety Systems

“KIMPER finally gave us governable identity and licensing. Clean APIs, clear matrices, and zero drama during rollout.”

ESR. Wijaya
Head of IT · Enterprise Services

“The One Apps booking experience was polished enough for executives and robust enough for ops. Approvals just work.”

WMS. Nugraha
Product Lead · Workplace Mobility

08 · Get in touch

Let's build something that lasts

Open to senior engagements, enterprise rebuilds, and product engineering partnerships.

Emailsony.surahman98@gmail.comOpenLinkedInin/code21insideOpenGitHubgithub.com/encode21OpenWhatsApp0851 5549 6769Open
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