Ardian Sinurat

Summary

Civil engineer working on irrigation and agricultural infrastructure in South Sumatra and Lampung: tertiary canal design, cost estimates, design reviews and construction supervision. I build the software that work needs — a supervision platform in daily use on seven rice-field development packages, a canal design studio that turns survey data into drawings, cost estimates and specifications — and research cheaper ways to measure terrain. I build with AI coding agents and hold every output to a check a reviewer can follow: automated tests, PDF layout gates and recomputation against issued documents.

Selected work

• Sipromon — Construction supervision platformApril 2026 – present · Live

  One web app for desk and field: daily progress with photo evidence, S-curves, weekly reports and approvals — in daily use on seven rice-field development packages. Key figure: 7 rice-field development packages supervised through Sipromon, Banyuasin, South Sumatra.

• Long Cross — Canal design studio for irrigation planningAugust 2026 – present · Live · team only

  Upload HEC-RAS geometry, field conditions and the alignment; the server rebuilds drawings, quantities and the cost estimate, and specifications read the same numbers. Key figure: 72 tertiary irrigation blocks in production across 3 schemes, South Sumatra.

• Swamp embankments from raw survey sheets — A second input path for the canal studioSeptember 2026 · In development

  Tidal-swamp farmland surveyed as spreadsheets, with no hydraulic model: a data contract, a checker and an embankment design step turn the sheets into drawings. Key figure: 14 embankment reaches drawn for the first village.

• Design-versus-cost review for 28 locations — A repeatable review pipeline instead of 28 manual checksSeptember 2026 · In progress

  Detailed designs and cost estimates for 28 locations checked against each other item by item, with review minutes and questions for the designers. Key figure: 28 locations with review minutes.

• Projevo — Evidence and progress platform for contractorsJuly 2026 – present · In development

  A multi-tenant SaaS for contractors: daily evidence, a hash-chained proof log, payment-milestone gates and a read-only view for the client. Key figure: 18 / 18 steps passed in the end-to-end runtime check.

• KasRapi — Cashier and cash book for small businessesFebruary 2026 – present · Live

  A web app and an offline-first Android app on Google Play: sales and cash entries stay on the phone and sync when the signal returns.

• Measuring terrain with a consumer drone — Research on one flight, three rounds of experimentsAugust – September 2026 · Research

  How much usable terrain can one consumer-drone flight and open models give you — and where does it stop being trustworthy? Stereo, a single photo, and the fusion of both. Key figure: −60% vertical RMSE after adding the barometer constraint (3.59 → 1.44 m).

• Geous — Offline field map for AndroidMay – June 2026 · Prototype

  An offline-first field map in the spirit of Avenza Maps: basemap, live GPS, waypoints, georeferenced geo-PDF maps and track recording. Key figure: 3 stages working on device.

• ATLAS — Running many AI coding sessions without collisionsJune 2026 – present · Internal

  A coordination board and a strict on-disk status system that let several AI coding sessions work in parallel on one laptop without editing the same files. Key figure: 12+ work streams coordinated in parallel.

• Watercooler — “An office that forgets”August 2026 · Open source

  A browser-based, RPG-style 2D office where a conversation is visible only to whoever is in the room when it happens. Key figure: 23 headless end-to-end checks.

Experience and education

• Irrigation design: tertiary canal rehabilitation — 3 irrigation schemes, South Sumatra2026
  • 72 tertiary blocks: long and cross sections, earthwork quantities, cost estimates (RAB), technical specifications and final reports.
  • Member of the RAB (cost estimate) team; built the Long Cross studio so the team could regenerate drawings and estimates whenever HEC-RAS geometry or field surveys changed.
  • Checked the gate schedule against 416 gate-structure drawings and rebuilt gate pricing from an assembly-based unit-price analysis.
• Construction supervision: rice-field development — 7 work packages, Banyuasin, South Sumatra2026
  • IT on the supervision team: built and maintained Sipromon, the supervision app the team uses for daily and weekly reporting.
  • Progress figures in the letters recomputed from daily backups with the platform's S-curve logic and validated against an issued letter.
• Construction supervision: design versus cost estimate review — 28 locations, Tulang Bawang & Mesuji, Lampung2026
  • On the supervision team: supervision app support and other supervision tasks.
  • Checked survey shapefiles and CAD drawings against the cost estimates item by item; review minutes per location with the questions the designers need to answer.
  • Traced the unit-price chain across all 28 estimates to find mis-referenced prices.
• Swamp-land embankment drawings — Tidal-swamp farmland, Banyuasin, South Sumatra2026
  • Defined the survey data contract and embankment design rules; produced long sections, cross sections and site plans directly from survey sheets.
• RAB Development Team — Sriwijaya University, Palembang05/2025 – 2026
  • Preparation and calculation of project budget plans (RAB).
  • Introduced Excel and Python automation into the calculation workflow.
• Geotechnical Surveyor — Sriwijaya University, Palembang05/2024 – 06/2024
  • Geotechnical field surveys, data collection and documentation.
• Bachelor of Civil Engineering — Sriwijaya University, Palembang07/2020 – present
  • Water resources, surveying and automation.

Skills

Civil engineering

Tertiary irrigation design (KP-03 / KP-05), Cost estimates (RAB / AHSP) and unit-price analysis, Technical specifications, Design review (DED vs RAB), Construction supervision and S-curve analysis, Contract change orders, Swamp embankment design, Field and geotechnical survey

Survey & geospatial

HEC-RAS geometry, KMZ / shapefile / DXF / DWG, Drone photogrammetry (feature matching, stereo), Monocular depth (MoGe-3) and MASt3R, GNSS / barometer georeferencing, Coordinate systems (UTM), Contours and DSMs

Automation & data

Python, pytest, openpyxl and Excel automation, Word document generation, PDF generation and layout checks, ezdxf, LibreOffice headless, NumPy / SciPy / OpenCV, PyTorch

Web & backend

TypeScript / Node.js, Express, Next.js / React, PostgreSQL (row-level security), Prisma, Redis, FastAPI, REST APIs

Mobile

Installable web apps (PWA) with offline queues, Expo / React Native, Flutter, Play Store releases

Delivery & operations

GitHub Actions CI, Docker / Coolify on a VPS, Railway, Vercel, Cloudflare (DNS, R2, Tunnel, Access), Sentry, Automated database backups

Working with AI agents

Multi-session Claude Code workflows, Coordination board and written hard rules, Review gates: tests, layout checks, recomputation against source documents