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Mashdun

Full-stack web developer, AI engineer & growth marketer. Building production-grade apps and intelligent solutions.

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    Capabilities

    What I can build for you

    Start with AI integrations & management — the help most businesses actually need. Below that, the full engineering bench across web, AI, business systems, and growth, each linked to live proof.

    Lead service

    AI Integrations & Management

    Most companies don't have an AI problem. They have an ownership problem — everyone agrees AI matters, nobody knows which tools to trust, what it should cost, where the data goes, or who answers for it when it gets something wrong.

    That's the gap we fill. We act as the AI function you don't have on staff: choosing the tools, integrating them into work your team already does, writing the rules for safe use, training people to use them well, and staying on the hook for cost and quality afterward. You don't need to become an AI expert. You need one accountable partner who already is.

    Sound familiar?

    • Three teams are quietly paying for four different AI tools, and nobody owns the bill.
    • Staff either avoid AI entirely or paste customer data into a consumer chatbot.
    • A pilot impressed everyone in a demo and never made it into daily work.
    • Nobody can say what the AI is allowed to decide on its own — or who checks it.

    Every one of these is a management gap, not a technology gap.

    AI readiness assessment

    We inventory the work you actually do, find where AI earns its keep, and say plainly where it doesn't. You get a ranked list of opportunities with effort, cost, and expected payback — not a hype deck.

    Strategy & roadmap

    A sequenced plan: what to pilot first, what to defer, which model or vendor fits each job, and what success looks like in numbers. Written so a non-technical owner can hold us to it.

    Integration & implementation

    The build. AI wired into the systems your team already uses — CRM, inbox, phones, docs, dashboards — so it shows up inside the workflow instead of in a separate tab nobody opens.

    Governance, data & policy

    A written AI use policy, decisions on what data may leave your walls, human-approval gates on anything customer-facing or financial, and an audit trail that shows who approved what.

    Team training & enablement

    Role-specific training on the tools you've actually deployed, with prompt patterns and guardrails for each job — so adoption comes from competence rather than mandate.

    Ongoing management & cost control

    Consolidated spend across providers, per-feature cost and usage monitoring, quality evals when models change under you, and a monthly review of what's working. Managed, not abandoned.

    How an engagement runs

    1. 1Assess

      Two weeks. Interviews, tool audit, and a ranked opportunity list.

    2. 2Roadmap

      Sequenced plan with costs, owners, and success metrics.

    3. 3Pilot

      One high-value workflow shipped end-to-end and measured.

    4. 4Integrate

      Roll into the systems the team already lives in.

    5. 5Manage

      Governance, training, cost review, and quality evals on a cadence.

    Book an AI readiness assessmentSee the AI we've already shipped

    Below is the engineering bench behind that work — the specific skills, grouped by discipline. Each card links to somewhere on this site where you can see it running.

    Web Development

    The foundation everything else sits on. Production Next.js applications — not templates — with typed end-to-end data flow, real auth, payments that reconcile, and tests in CI. Built so a second developer can pick it up without a rewrite.

    Next.js App Router (full-stack)

    Production apps with SSR, ISR, server actions, and the full App Router — from routing to deployment.

    React + TypeScript

    Strictly typed component architecture, custom hooks, context, and performance-optimized rendering patterns.

    Tailwind CSS + Design Systems

    Scalable design tokens, consistent component libraries, and pixel-perfect responsive UIs from scratch.

    Prisma ORM + PostgreSQL

    Schema design, complex queries, migrations, and relational modeling for production databases.

    API Development (REST, GraphQL, OpenAPI)

    Well-documented, versioned APIs with proper auth, rate limiting, validation, and OpenAPI specs.

    tRPC (type-safe APIs)

    End-to-end type-safe API layers with zero schema duplication between client and server.

    Authentication (NextAuth, Clerk)

    Full auth flows — OAuth, magic links, sessions, JWTs, role-based access, and multi-tenant support.

    Stripe Payments & Billing

    Subscriptions, one-time payments, webhooks, metered billing, and customer portal integrations.

    Edge / Serverless functions

    Globally distributed compute with Vercel Edge, Cloudflare Workers, and cold-start optimized lambdas.

    Redis caching & queues

    Cache strategies, job queues (BullMQ), pub/sub, and rate limiting to handle high-throughput workloads.

    WebSockets / real-time

    Live dashboards, chat, collaborative features, and streaming UIs using WebSockets and SSE.

    Docker + CI/CD pipelines

    Containerized apps, multi-stage builds, GitHub Actions workflows, and automated test/deploy pipelines.

    AWS S3 / Cloudflare / Vercel

    Object storage, CDN configuration, edge caching, and infrastructure-as-code for scalable deployments.

    Testing (Vitest, Playwright, Jest)

    Unit, integration, and E2E test suites with CI enforcement, coverage thresholds, and typed mocks.

    Monorepo architecture (Turborepo, pnpm)

    Shared packages, incremental builds, and workspace tooling for large codebases with multiple apps.

    AI Development

    The engineering underneath the AI features: retrieval that cites its sources, agents with tool access and human checkpoints, streaming interfaces, and evals that catch quality drift when a provider changes a model on you.

    OpenAI (all models — GPT, o1, o3, Realtime)

    Chat completions, function calling, structured outputs, assistants, and the Realtime API for voice and streaming.

    Anthropic Claude (all models)

    Claude Opus, Sonnet, and Haiku integrations — extended context, tool use, agents, and vision capabilities.

    Google Gemini (all models)

    Gemini 2.x Flash and Pro — multimodal inputs, long context, and native Google ecosystem integrations.

    AI Agents & Tool Use

    Multi-step autonomous agents with tool calling, memory, planning loops, and human-in-the-loop checkpoints.

    RAG (Retrieval-Augmented Generation)

    Full RAG pipelines — chunking, embedding, retrieval, reranking, and grounded response generation.

    Embedding & semantic search

    High-performance vector search with cosine similarity, hybrid search, and metadata filtering at scale.

    Prompt engineering & evals

    Systematic prompt design, chain-of-thought, few-shot patterns, and automated eval frameworks.

    Multimodal AI (vision, audio, documents)

    Image analysis, document parsing, audio transcription, and mixed-modality pipelines across providers.

    AI Voice & TTS (WebSockets, Realtime API)

    Low-latency voice applications using OpenAI Realtime API, WebSocket streaming, and speech synthesis.

    AI Streaming (SSE, streaming responses)

    Token-by-token streaming UIs, server-sent events, and backpressure-aware streaming architectures.

    Vector databases (Pinecone, pgvector)

    Index management, namespace isolation, upsert pipelines, and ANN search for production RAG systems.

    LangChain / LlamaIndex pipelines

    Composable LLM pipelines, document loaders, retrievers, and chain abstractions for complex workflows.

    Model Context Protocol (MCP)

    Building and consuming MCP servers to give AI agents structured access to tools, data, and APIs.

    AI-powered automations (n8n, Zapier)

    No-code/low-code automation workflows with LLM nodes for classification, extraction, and generation.

    LLM model benchmarking & evals

    Head-to-head model scoring on your real tasks — cost, latency, and quality per model, with an LLM-as-judge rubric so the pick is evidence, not vibes.

    Custom LLM models

    Purpose-built models for your domain: fine-tuned open-weight bases, distilled smaller models to cut cost, and private deployments where data can't leave your walls.

    Fine-tuning (LoRA, PEFT)

    Domain adaptation of open-source models using LoRA and PEFT techniques on custom datasets.

    AI image generation (GPT-Image, DALL·E, SD)

    Programmatic image creation, variation, and editing pipelines for product, marketing, and content use cases.

    AI video generation (OpenRouter, model routing)

    Text- and image-to-video pipelines across OpenRouter's video models (Seedance, Kling, Wan, Hailuo, Veo), with AI auto-selecting the best model per scene.

    Voice transcription & AI enhancement

    Dictation-to-text with LLM cleanup and rewriting — wired into any text input for faster, polished copy.

    Document & receipt OCR extraction

    Vision-model parsing of receipts, invoices, and documents into structured, validated data fields.

    Business Systems

    The unglamorous software a business actually runs on — CRM, invoicing, bookkeeping, scheduling, inventory. Replaces the spreadsheet-and-sticky-note layer with something auditable that your team will keep using.

    CRM (customers, contacts, pipeline)

    End-to-end customer management — contacts, companies, deal stages, activity history, and notes.

    Invoicing & Stripe billing

    Send branded invoices with Stripe Payment Links, track payment status, and reconcile automatically via webhooks.

    Recurring & subscription billing

    Schedule monthly or custom-interval invoices that generate and send themselves on autopilot.

    Bookkeeping & chart of accounts

    A QuickBooks-style ledger — chart of accounts, expense categories, and live profit & loss reporting.

    Expense & receipt capture

    Upload a receipt, let AI extract the vendor, date, and amount, and file it against the right account.

    Mileage tracking

    Log trips with automatic distance lookup and IRS-rate mileage deductions for tax time.

    Estimates & proposals

    Build estimates, send them for client acceptance, and convert accepted quotes straight into invoices.

    Transactional email (Resend)

    Automated invoice, receipt, statement, reminder, and welcome emails with branded HTML and PDF attachments.

    Marketing Hub (ad creative studio)

    Generate on-brand ad images and video for campaigns, with prompt tooling and a saved asset library.

    Label & print designer

    Drag-and-drop designer for product labels and print assets with precise sizing and export.

    System health monitoring

    Live dashboards for service status, uptime, and integration health with at-a-glance diagnostics.

    PDF generation

    Server-rendered PDFs for invoices, statements, and documents — pixel-consistent and email-ready.

    Growth Marketing

    Measurement first. Clean attribution and analytics so you can tell which channel actually produced revenue, then the campaign, SEO, email, and experimentation work that compounds on top of trustworthy numbers.

    GA4 + GTM implementation

    Full analytics setup — event schemas, custom dimensions, conversion tracking, and data layer architecture.

    Marketing attribution modeling

    Multi-touch attribution, assisted conversion analysis, and channel ROI reporting across the funnel.

    SEO strategy & technical SEO

    Core Web Vitals, structured data, crawl optimization, content gap analysis, and programmatic SEO.

    Content strategy & creation

    Editorial calendars, SEO-led content briefs, long-form articles, and AI-assisted content workflows.

    Email automation (Klaviyo, Mailchimp)

    Lifecycle flows, segmented campaigns, A/B tests, and behavioral trigger sequences for retention.

    Paid search & social campaigns

    Google Ads and Meta campaign setup, audience building, bidding strategies, and performance reporting.

    CRO & A/B experimentation

    Hypothesis-driven tests, statistical significance analysis, and iteration loops to lift conversion rates.

    UTM tracking & campaign QA

    Consistent UTM taxonomy, tagging audits, and real-time dashboards to keep attribution clean.

    Analytics dashboards (Looker, Metabase)

    Self-serve BI dashboards with live data connections, drill-downs, and automated report delivery.

    Customer segmentation & lifecycle

    RFM models, cohort analysis, and lifecycle stage mapping to improve LTV and reduce churn.

    Segment CDP integration

    Source/destination setup, identity resolution, and event tracking pipelines through Segment.

    Affiliate & referral programs

    Program setup, tracking infrastructure, payout logic, and partner recruitment for growth loops.