Senior Software Engineer

Engineering Scalable Solutions, Not Just Code.

Senior engineer focused on fintech systems, microservices, API design/security, and scalable deployments with Docker + Linux.

My Workflow Case Studies Website
Dhaka, Bangladesh Backend • Microservices • DevOps API Reliability & Security
Senior Focus
What I optimize for
Architecture
  • Translate requirements into clear technical scope
  • DB design + data integrity strategies
  • Reliable APIs & integration patterns
  • Dockerized deployments on Linux servers
  • Maintainability: tests, boundaries, runbooks

Senior Engineering Workflow

I don’t just deliver features — I design the system that survives scale, change, and integration complexity.

Process-first execution
Requirement Analysis
Clarify scope, constraints, risk, and integration boundaries. Convert ambiguity into deliverable specs.
Database Architecture
Model domains, normalize where needed, choose indexing strategy, and design safe migrations.
Complex Logic Design
Design services/modules, define contracts, ensure idempotency, concurrency safety, and testability.
Development
Build with maintainable patterns, readable boundaries, and predictable error handling.
Docker/Linux Deployment
Containerize, harden configs, log/monitor, and ship reliably on Linux servers.

Technical Expertise

Grouped by how I think about systems in production.

Backend Architecture
Core
Laravel / PHP Microservices & REST APIs System Design & Domain Modeling API Security & Optimization Payment/Billing Platform Patterns
DevOps & Server (Docker/Linux)
Core
Docker (containerized deployments) Linux Server Management (Ubuntu, CentOS) Nginx / Apache CI/CD (Jenkins, Git workflows) AWS (instances & cloud basics)
Frontend
Core
Bootstrap 5 UI jQuery / Ajax Vue.js (integration experience) Responsive UI & UX polish

Project Case Studies

Each card shows a real engineering narrative: Challenge → Solution.

Senior-style portfolio

Fintech Bill Collection Platform

Stack
Case
Laravel MySQL REST Docker Linux
Challenge
Needed reliable bill payments with integration to external providers and strong transaction traceability.
Solution
Designed service boundaries, added idempotent payment flows, structured audit logs, and shipped containerized deployments.
Highlights
  • Resilient API integrations
  • Traceable transaction ledger
  • Performance-focused query patterns

Payment Gateway Integration Layer

Stack
Case
Laravel API Security Microservices
Challenge
Multiple payment providers with different auth/response formats increased maintenance cost.
Solution
Implemented a unified adapter contract, standardized error taxonomy, and centralized signature verification.
Highlights
  • Adapter pattern for providers
  • Consistent error handling
  • Secure request signing

Containerized Deployment Blueprint

Stack
Case
Docker Nginx Linux CI/CD
Challenge
Inconsistent environments caused regressions between dev/staging/prod.
Solution
Created reproducible Docker images, environment templates, health checks, and release checklist.
Highlights
  • Reproducible builds
  • Health checks & rollback readiness
  • Team-friendly runbooks

AI Log Analysis Assistant (Offline) — Ollama

Stack
Case
Laravel Ollama LLM Docker Linux Observability
Challenge
Operations teams needed faster root-cause analysis from large log volumes, but data could not leave the environment (privacy/compliance).
Solution
Built an offline log analysis workflow using Ollama, added structured parsing + summarization prompts, and produced actionable incident insights (errors, timelines, suspected causes) with reproducible runs.
Highlights
  • Offline/private LLM inference (no external calls)
  • Log normalization + context window management
  • Actionable outputs: suspected cause, next steps, related services

Offline Institution Payment System (Gateway API Integration)

Stack
Case
Laravel REST API MySQL Queue/Jobs Security
Challenge
Institutions required payment processing that could tolerate intermittent connectivity while still ensuring transaction integrity and reconciliation.
Solution
Designed an idempotent payment pipeline with local staging + retry jobs, standardized gateway adapters, and built reconciliation reports to match gateway callbacks against internal ledgers.
Highlights
  • Idempotency keys + duplicate prevention
  • Retry strategy with queues + status state machine
  • Reconciliation reports + audit logs

Loan Application Platform with eKYC / Verification

Stack
Case
Laravel MySQL API Integration Security RBAC
Challenge
Loan onboarding required identity verification and risk checks while maintaining a smooth user flow and strict access controls.
Solution
Implemented a verification workflow (document capture + status transitions), integrated external eKYC services, and enforced role-based approvals with traceable decision logs.
Highlights
  • Workflow-driven state machine (Draft → Submitted → Verified → Approved/Rejected)
  • RBAC approvals with audit trails
  • Secure PII handling + access boundaries

Offshore Banking Platform Modules

Stack
Case
Microservices Laravel REST DB Design Security
Challenge
Banking workflows demanded consistency, traceability, and safe integration boundaries across multiple modules and services.
Solution
Designed modular service boundaries, defined consistent API contracts, and introduced audit-friendly transaction records and error handling standards for operational stability.
Highlights
  • Clear service boundaries + contracts
  • Operational logging + traceability
  • Integration patterns with strict validation

Maximum Portal (Multi-Role Admin/User Platform)

Stack
Case
Laravel Bootstrap jQuery RBAC MySQL
Challenge
Needed a single portal supporting multiple roles (admin, operations, customer support, etc.) with clean permission management and consistent UX.
Solution
Built a role/permission matrix with policy-based access and a modular UI layout so each role sees the right tools without duplicating screens.
Highlights
  • RBAC + policy enforcement
  • Modular UI sections per role
  • Scalable navigation + permission-driven menus

Customer Experience System (CXS) + Feedback Workflows

Stack
Case
Laravel REST MySQL Reporting Background Jobs
Challenge
Stakeholders needed a unified view of customer issues and feedback with clear ownership, SLA tracking, and reporting.
Solution
Created a ticket/feedback workflow with assignment + status transitions, built dashboards and reports, and automated SLA reminders using background jobs.
Highlights
  • Workflow + SLA tracking
  • Dashboards + exportable reports
  • Automations via jobs/cron

Role & User-Based Alert System (Event-Driven Notifications)

Stack
Case
Laravel Queues Webhooks/Email/SMS RBAC
Challenge
Alerts needed to route to the correct teams/users based on role, severity, and business rules—without spamming or missing critical events.
Solution
Implemented rule-based alert routing with severity tiers, deduplication, throttling, and per-role subscriptions. Delivered notifications through configurable channels.
Highlights
  • Deduplication + throttling to avoid noise
  • Rule engine for routing (role/team/user)
  • Channel abstraction (email/SMS/webhook)

Let’s build something production-grade.

If you want someone who can handle analysis, architecture, and reliable delivery — I’m available.

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Focus: Project Analysis, DB Design, Logic Optimization, Laravel, Docker, Linux Server Management.