Preview coming soon
Nimbus — Multi-Tenant SaaS Billing Platform
A multi-tenant billing and subscription management platform that handles metered usage, invoicing, and dunning for B2B SaaS companies.
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Available for new projects
Hi, I'm
MD. Huzaifa Islam
Full Stack Engineer · AI Automation Engineer · AI Agent Developer · Backend Engineer · SaaS Developer
I build scalable SaaS applications, AI-powered automations, backend systems, cloud infrastructure, and modern web experiences.
React
AI / LLM
Node.js
PostgreSQL
Career Journey
Where I've grown as an engineer
From my first professional role to leading full-stack development today — a look at the experience, ownership, and impact behind the work.
Total Experience
1.5+ years
Across 2 companies, still growing
HS
Mid-Level Software Engineer
Currentat HiScale
Own full-stack architecture for HiScale's B2B sales-automation and lead-generation SaaS platform — from database design and backend services to the client-facing UI. Promoted from Software Engineer to Mid-Level Software Engineer within about a year after redesigning the core database and driving key architecture decisions.
0%
Platform performance improvement
0K+
Lead records migrated
0+
Third-party integrations shipped
Feb 2025 — Present(1 Year 7 Months)Full-time · RemoteParis, France · Remote
Tech Stack
Next.jsReactTypeScriptTailwind CSSNode.jsExpress.jsFastAPIPostgreSQLSupabaseRedisBullMQn8nDockerJWTOAuth 2.0OpenAI APISmartLeadGoogle Sheets APISlack APISalesforceHubSpotLinkedIn Sales NavigatorIcypeasGitHub
Key Responsibilities
- Architect and build the Business Manager platform end to end — UI, backend services, database schema, and authentication
- Design and maintain the CRM, audience management, and AI-powered outreach features used by paying clients
- Build and operate production automation workflows on a self-hosted n8n instance, plus background workers, queues, and cron jobs
- Lead technical decisions on system design, database migrations, and performance optimization alongside the engineering team
Achievements & Impact
- Redesigned and normalized the core database architecture, migrating 500,000+ lead records with no further data loss
- Improved overall platform performance by roughly 70% through backend, API, query, and frontend optimization
- Proposed and led a self-hosted n8n migration, cutting automation infrastructure costs and unlocking full workflow control
- Built the AI Icebreaker and internal prompt-management systems, enabling dynamic AI content generation without code changes
- Integrated SmartLead, Salesforce, HubSpot, Google Sheets, Slack, and LinkedIn tooling into a unified outreach pipeline
- Promoted from Software Engineer to Mid-Level Software Engineer within roughly a year for architecture and technical leadership
Selected Work
A closer look at what I've shipped
Browse the projects below, then open one to see the full story — the problem, the approach, and the impact it had in production.
Featured
Preview coming soon
Orbit — AI Support Copilot
An AI-powered support copilot that drafts responses, summarizes tickets, and automates repetitive customer support workflows.
+3
Preview coming soon
Bridge — CRM Integration Hub
A unified integration layer that syncs customer and deal data across CRMs, marketing tools, and internal systems in real time.
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Technology Showcase
A stack built for production, not just demos
Everything I reach for regularly, at a glance — filter by category to narrow it down.
TypeScriptJavaScriptPythonSQLHTML5CSS3ReactNext.jsApp RouterServer ComponentsSSRSSGISRDynamic RoutingTailwind CSSShadcn UIRadix UIFramer MotionRedux ToolkitTanStack QueryZuZustandReact Hook FormZodReact RouterAxiosSWRTanStack TableMaterial UIAnt DesignChakra UINode.jsBunnpmpnpmExpress.jsFastifyREST APIsGraphQLAPI RoutesServer ActionsMiddlewareWebSocketsSocket.IORedisPostmanSupabase Edge FunctionsSupabase RealtimeJWTOAuth 2.0RBACSession ManagementRate LimitingCORSSecrets ManagementSupabase AuthSupabase RLSPostgreSQLMongoDBMySQLSQLiteNeonSupabasePrisma ORMSQLAlchemyPineconeDockerDocker ComposeGitGitHubGitHub ActionsCI/CDNginxTraefikLet's EncryptLinuxSSHApacheAWSSelf-Hosted VPSVercelRailwayCloudflareSupabase StorageOpenAI APIClaude APIGoogle Gemini APILangChainPrompt EngineeringLLM Integrationn8nStripeHubSpotSalesforceGoogle Sheets APIGoogle Drive APIGoogle Cloud ConsoleSlack API
Services & Specializations
Domains I specialize in
From AI product builds to backend systems, infrastructure, and CRM/automation engineering — the areas of work I plug into, end to end.
Full-Stack Web Engineering
Full Stack DevelopmentScalable Web ApplicationsComponent-Based ArchitectureState ManagementForm Validation & Data IntegrityAccessibility (A11Y)Responsive & Mobile-First DesignDark Mode & Theme SystemsProgressive Web Apps (PWA)Internationalization (i18n)
AI & LLM Product Development
AI Product DevelopmentAI-Enabled Full Stack DevelopmentLLM Application DevelopmentRetrieval-Augmented Generation (RAG)Generative AI ApplicationsAI API & Workflow Integration
Backend, API & Data Engineering
API Architecture & DocumentationThird-Party API IntegrationSystem Design & Scalability PlanningRelational & NoSQL Database DesignQuery & Index Performance TuningMicroservicesWebhook DevelopmentCaching StrategiesBackground Jobs & QueuesSecure Application DevelopmentError Handling & Structured Logging
Workflow, CRM & Sales Automation
Workflow EngineeringBusiness Process AutomationCRM Engineering & IntegrationSales Automation SystemsNo-Code / Low-Code AutomationEmail & Notification Automation
Lead Intelligence & Data Engineering
Lead Generation & EnrichmentSales & Prospect IntelligenceContact Discovery & Email VerificationLinkedIn Data AutomationWeb & Data ScrapingData Cleaning & Bulk ProcessingData Pipeline Development
DevOps & Cloud Infrastructure
Self-Hosted & Cloud DeploymentZero-Downtime DeploymentsServerless DeploymentVPS & Server AdministrationReverse Proxy ConfigurationDNS & Domain ManagementEnvironment Management
Engineering Process & Collaboration
Agile DevelopmentProblem SolvingCode ReviewSoftware TestingDebuggingTechnical DocumentationCross-Functional CollaborationRemote Development
About Me
The engineer behind the work
I'm a full-stack software engineer based in Chittagong, Bangladesh, currently in my 3rd year of a B.Sc. in Computer Science & Engineering at CUET while working full-time as a professional software engineer. I treat software as a discipline, not just code that runs — before I write a line, I think in terms of requirements, architecture, and failure modes, designing for scalability and maintainability so the next engineer (often future me) can extend it with confidence. I follow the full development lifecycle end to end, from the first requirement to the system running in production and every iteration after.
Stage 01 of 09
Requirements Analysis
Understand the real problem, constraints, and success criteria before any design or code exists.
Education
Academic background
Higher Secondary
Higher Secondary Certificate (HSC), Science
Dhaka Residential Model College
Mohammadpur, Dhaka, Bangladesh
Contact
Let's build something great
Open to full-time roles, freelance collaborations, and interesting engineering problems. Reach out and I'll get back to you within a day or two.