Global rank:
35,404 / 152,673
Skill pts: 5
Construction Drawings Database Development PlanSwift Quantity Surveying Resource Planning

About

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Experience

  • Freelance Software Developer | Python & PHP Independent / Self-employed · Freelance Jun 2022 – Present 4 yrs 4 mos Turkey Independent PHP and Python development for practical business and operational workflows, including data validation, database-backed tools, procurement approvals, cost tracking, resource planning and reporting. My civil engineering background helps me translate construction requirements into useful software and data checks.

    Personal projects published on GitHub include CrewMetric (man-hours and production performance), SiteLedger (material movements and stock reconciliation), WorkWeave (project delivery and capacity planning) and SentryScope (Python static analysis and finding history). These are independent personal projects, not claims of commissioned client engagements.

    Technologies: Python, PHP, cloud technologies and databases. Examples: https://github.com/celalerakman
  • Owner & Construction Manager erakmn ltd. şti. · Self-employed Mar 2016 – Feb 2020 3 yrs 11 mos Turkey Owned and managed a residential construction business delivering more than 100 villa, prefabricated-house and wooden-house projects. Coordinated teams of approximately 25–50 people, suppliers, subcontractors, material procurement, schedules and site execution from initial planning through ready-to-live completion. This business has closed; this is historical experience.

Education

  • Atılım University Bachelor of Science (BSc), Civil Engineering 2001 – 2006

Other experience

  • Software Portfolio — GitHub Project Catalogue Independent software portfolio: https://github.com/celalerakman

    The following are personal software projects. Source code and repository documentation are available for review; they are not presented as commissioned client work or evidence of commercial deployments.

    certiflow — Cumulative quantity certification and payment calculations.
    https://github.com/celalerakman/certiflow

    traceledger — Traceable BOQ measurements and ERP cost-code staging.
    https://github.com/celalerakman/traceledger

    procuregate — Transactional purchasing workflow with budget and approval controls.
    https://github.com/celalerakman/procuregate

    sitequeue — Durable job processing with leases, retries and stale-worker fencing.
    https://github.com/celalerakman/sitequeue

    landed-cost — Compare supplier quotations including freight and minimum orders.
    https://github.com/celalerakman/landed-cost

    inventory-reorder — Lead-time inventory thresholds with safety stock.
    https://github.com/celalerakman/inventory-reorder

    dependency-schedule — Earliest finish calculation for task dependency networks.
    https://github.com/celalerakman/dependency-schedule

    invoice-deduplication — Find duplicate invoice references within supplier boundaries.
    https://github.com/celalerakman/invoice-deduplication

    unit-converter — Decimal quantity conversion with dimensional checks.
    https://github.com/celalerakman/unit-converter

    uat-coverage — Requirement coverage and acceptance-test readiness checks.
    https://github.com/celalerakman/uat-coverage

    retry-jitter — Bounded exponential backoff with injectable full jitter.
    https://github.com/celalerakman/retry-jitter

    content-addressing — Canonical JSON fingerprints for repeatable content identity.
    https://github.com/celalerakman/content-addressing

    log-redaction — Recursive sensitive-key masking for structured logs.
    https://github.com/celalerakman/log-redaction

    atomic-artifacts — Atomic local artifact replacement using same-filesystem temporary files.
    https://github.com/celalerakman/atomic-artifacts

    token-bucket — A local rate limiter driven by explicit monotonic timestamps.
    https://github.com/celalerakman/token-bucket

    storage-forecast — Storage capacity estimates from retention, replicas and daily growth.
    https://github.com/celalerakman/storage-forecast

    currency-parser — Parse decimal currency strings into integer cents.
    https://github.com/celalerakman/currency-parser

    invoice-matcher — Reconcile purchase orders, receipts and invoice quantities.
    https://github.com/celalerakman/invoice-matcher

    approval-routing — Route purchasing approvals by explicit value thresholds.
    https://github.com/celalerakman/approval-routing

    csv-export — Export text rows with spreadsheet formula neutralization.
    https://github.com/celalerakman/csv-export

    delivery-reconciliation — Track outstanding quantities across partial delivery notes.
    https://github.com/celalerakman/delivery-reconciliation

    vendor-validation — Validate vendor master rows before data migration.
    https://github.com/celalerakman/vendor-validation

    boq-overruns — Find measured quantities exceeding contracted BOQ quantities.
    https://github.com/celalerakman/boq-overruns

    unmeasured-boq — Identify contracted BOQ items without site measurement evidence.
    https://github.com/celalerakman/unmeasured-boq

    contract-valuation — Aggregate BOQ contract value by project and currency.
    https://github.com/celalerakman/contract-valuation

    measurement-history — Inspect running quantities across source measurement records.
    https://github.com/celalerakman/measurement-history

    referential-audit — Inspect SQLite foreign-key consistency.
    https://github.com/celalerakman/referential-audit

    query-plan-inspector — Inspect composite-index use for measurement lookups.
    https://github.com/celalerakman/query-plan-inspector

    sentryscope — Local Python static analysis with data-flow traces and auditable finding history.
    https://github.com/celalerakman/sentryscope

    workweave — Company operations, project delivery and weekly capacity planning.
    https://github.com/celalerakman/workweave

    siteledger — Construction material inventory with atomic warehouse movements and auditable stock reconciliation.
    https://github.com/celalerakman/siteledger

    crewmetric — Construction workforce management, approved man-hours and measured production performance.
    https://github.com/celalerakman/crewmetric

    Workstream Register — Project coordination, workstreams and delivery tracking.
    https://github.com/celalerakman/workstream-register
  • International Construction & Project Controls Selected experience from my construction career:

    School construction — Site Chief, Özlem Duru İnşaat: coordinated machinery and labor, prepared quantity takeoffs, BOQ, bid reports, construction cost estimates and Excel cash-flow forecasts. Used PlanSwift and Bluebeam and coordinated material and labor schedules. This engagement has ended.

    Gürbağ A.Ş. — Senior Planning Engineer, January 2013–February 2016: head-office project planning, procurement and materials coordination, site visits and progress-payment review for Avrocity housing and Zaho university campus projects in Northern Iraq.

    Polikon & Karamaden Partnership — Technical Office Manager, July 2010–December 2012: technical office responsibilities on a 1,400-residence OPGI housing development in Algeria.

    Kolin A.Ş. — Technical Office Manager, March 2009–April 2010: pipelines and pools for the Great Man-Made River project in Benghazi, Libya.

    ATK-YOL — Site Chief, March 2008–February 2009: infrastructure works on Ilısu Dam security access roads and outposts in Mardin, Türkiye.

    VHP Yapı — Site Chief, October 2006–February 2008: reinforced-concrete structures and excavation works at industrial facilities in Kırıkkale, Türkiye.

Stats

Joined: October 23, 2026

Last seen: October 23, 2026

Languages

English Full professional proficiency

Turkish Native or bilingual proficiency

Location

Bursa, Turkey