Marcus Webb
Senior Software Engineer · Appex Technology
Marcus has spent nine years building distributed systems, APIs, and data pipelines for startups and growth-stage companies. Before joining Appex Technology, he was the lead backend engineer at a fintech startup where he architected the core transaction-processing API handling millions of operations monthly. Before that, he spent four years at a health technology company building care coordination software used by clinical teams across multiple regions.
He joined Appex Technology because he wanted to work on a wider range of problems. Healthcare intake systems one quarter, e-commerce APIs the next, self-hosted CRM platforms after that. He brought a strong bias toward clean API design and infrastructure-as-code, and has become the team's lead for self-hosting architecture, AI integrations, and anything involving complex data pipelines or multi-system integrations.
Marcus writes about the engineering side of the decisions businesses face: when to self-host versus use managed SaaS, how to architect a system for the long term, what it actually takes to integrate a large language model into a real product, and how to migrate off a legacy platform without losing data or confidence. His guides assume readers want to understand the "why" behind a technical choice, not just the "what."
He has a particular interest in the self-hosting space — the convergence of mature open-source projects (Twenty, Medusa, n8n, PostHog) with affordable cloud infrastructure has made self-hosting genuinely practical for businesses of all sizes, and Marcus has deployed most of them for clients.
Areas of expertise
Questions or project inquiries? Reach us at info@appextechnology.com or use the contact form.
Articles by Marcus Webb
Fintech Software Development: Secure Dashboards, Payments & Compliance
What goes into building fintech software in 2026 — secure dashboards, payment and banking integrations, and compliance-aware data flows, owned and self-hosted.
Replacing Spreadsheets With Internal Tools: When and How
When a spreadsheet becomes a liability and how to replace it with a custom internal tool — the warning signs, the options, and a low-risk migration path.
Customizing Twenty CRM: An Open-Source Alternative to Salesforce
Why Twenty CRM is the open-source CRM worth building on in 2026, and how to customize and self-host it for your sales process without vendor lock-in.
How to Build a Website Without WordPress, Wix, or Squarespace
You don't need a page builder to get a great website. Here's how custom-coded sites compare to WordPress, Wix, and Squarespace on speed, SEO, cost, and ownership.
Automating Business Workflows With n8n (Self-Hosted)
How to automate repetitive business workflows with self-hosted n8n — what to automate first, how it compares to Zapier, and why owning your automation matters.
Modernizing Legacy Software Without a Risky Rewrite
How to modernize legacy systems without a dangerous big-bang rewrite — the strangler-fig approach, where to start, and how to reduce risk while keeping the business running.
Why API-First Architecture Saves Money Long Term
What API-first architecture means, why it lowers long-term cost and risk, and how building behind your own API layer keeps your software flexible and lock-in free.
Migrating Off a SaaS Tool: A Safe Data Migration Playbook
A step-by-step playbook for migrating data off a SaaS tool safely — exporting, mapping, validating, and cutting over without losing records or downtime.
Build a Custom AI Assistant on Your Own Data (RAG Explained)
What RAG (retrieval-augmented generation) is and how to build a custom AI assistant grounded in your own documents — accurate, private, and owned by you.
AI Document Automation: Cut Manual Data Entry for Good
How AI document automation extracts data from PDFs, invoices, and forms — what it can reliably do in 2026, where to use it, and how to keep a human in the loop.
The Best Tech Stack for a New B2B Product in 2026
A pragmatic 2026 tech stack for a new B2B product — what to choose for frontend, backend, auth, and hosting to ship fast, stay cheap, and avoid lock-in.
Integrating Stripe Into a Custom App: A Practical Guide
How to add Stripe payments to a custom application the right way — one-time payments vs subscriptions, webhooks, and the pitfalls that break billing.
Self-Hosting on AWS: Own Your Software Instead of Renting It
What it means to self-host open-source software on AWS — the benefits, the real responsibilities, and how a managed setup gives you ownership without the headache.
Headless CMS vs WordPress: Which Should You Choose?
Headless CMS vs traditional WordPress — how they differ on performance, security, flexibility, and SEO, and which fits your project in 2026.
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