Mohsin A.

ERP

Fiverr • Freelance

Feb 2026 - Present • 7 mos

Role: Full-Stack Developer / System Architect Project Type: Accounting / ERP / Construction Management I designed a multi-site accounting and expense-management system for construction businesses where different sites, departments, supervisors, workers, accountants, vendors, and management teams need to work within one centralized platform. The system replaces manual expense, approval, purchasing, reimbursement, and accounts-payable processes with structured digital workflows. Major Features Multi-company architecture Multiple construction sites Department management Employee and worker management Role-based access Expense management Receipt management Reimbursements Multi-level approval workflows Configurable approval rules Vendor management Purchase requests Quotations Purchase orders Goods receipts Vendor invoices Accounts payable Partial and full invoice payments Vendor ledger Cash and bank accounts Payment categories Accounting journal entries Site-wise financial reporting Management dashboards Advanced Approval Engine Instead of hard-coding approval rules, I designed a configurable approval engine. Approval workflows can be selected according to: Transaction amount Expense category Construction site Department Requester's role This allows businesses to change approval policies without modifying application code. Accounts Payable The system supports the complete purchasing and payment lifecycle: Purchase Request → Quotation → Purchase Order → Goods Receipt → Vendor Invoice → Approval → Accounts Payable → Payment → Vendor Ledger It also supports partial payments, multiple payments against one invoice, and a single payment covering multiple invoices. Technologies Laravel, Vue.js, PHP, JavaScript, MySQL, REST APIs, Queues/Jobs and accounting ledger architecture.

Debt Collection SaaS Platform

Debtia AS • Fulltime

Jan 2021 - Present • 5 yrs 8 mos

Debtia is a debt collection and case-management platform that helps businesses manage creditors, debtors, debt cases, subscriptions, installment plans, and external collection-service integrations. I worked extensively on complex backend business logic where data integrity and synchronization between different systems were critical. My Work Developed and maintained Laravel backend functionality Built REST API integrations Implemented creditor and debtor management Developed debt-case workflows Implemented subscription and unsubscription rules Created installment-plan functionality Developed complex validation and eligibility rules Implemented background jobs and queue processing Integrated external debt-collection services Prevented duplicate subscriptions and records Implemented synchronization between internal and external systems Worked with payment and subscription services Improved reliability of asynchronous operations The system contained complex rules determining when clients and debtors could be subscribed or unsubscribed based on their cases, subscription status, and external identifiers. Technologies PHP, Laravel, Vue.js, JavaScript, MySQL, REST APIs, Redis/Queues, Stripe, Chargify, SendGrid and third-party integrations. My Contribution My work was primarily focused on backend architecture, business logic, integrations, asynchronous processing, database design, debugging, and maintaining reliable communication between multiple services.

StartHub Centers — Workspace Management & CRM Integrations

Starthub • Freelance

Nov 2023 - Apr 2025 • 1 yr 5 mos

Role: Full-Stack Developer Project Type: Workspace / CRM / Customer Management Platform I worked on StartHub Centers, a business and workspace-management platform involving customer onboarding, subscriptions, CRM functionality, mailbox services, and third-party platform integrations. A significant part of my work involved connecting different SaaS platforms and eventually helping migrate important business functionality and data into an internally controlled system. My Work Customer onboarding workflows Subscription management Upgrade and downgrade workflows Customer portal functionality CRM integration Mailbox management functionality Support/ticket synchronization Third-party API integrations Data synchronization Automation of repetitive administrative processes Integrations I worked with platforms including: HubSpot SphereMail Chargify WordPress External REST APIs Data Migration Later, I worked on migrating information from HubSpot and SphereMail into the company's own system. I used Python scripts for data export, transformation, cleanup, mapping, and import, allowing information from multiple external platforms to be consolidated into the internal application. Technologies PHP, WordPress, JavaScript, Python, HubSpot APIs, SphereMail APIs, Chargify and REST APIs