Web + SaaS + Full-Stack

Senior Freelance Web Developer serving Alicante, Costa Blanca, and Global Remote Clients

Marc Donaldson — 30+ Years Experience in Bespoke Software

Specializing in high-performance Next.js apps, custom property CRMs, and legacy code modernization. Delivering scalable digital products from the Costa Blanca to the world.

Available for remote work globally — based in Spain (CET)
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Philosophy

Architecture meets design

CraftingscalableWeb,SaaS,andSoftwaresolutionswithSvelte,Next.js,andReact.

With over three decades in the industry, I bridge the gap between complex technical architecture and intuitive user design. I specialize in building high-performance web applications, SaaS solutions, and modern software products that scale.

30+Years
100+Projects
15+Techs
Core Stack

Languages

PHPJavaC++PythonColdFusionC# .NETTypeScriptJavaScript

Frameworks

ReactNext.jsTailwind CSSSvelte

Infrastructure

MySQLPostgresCloudflareMobile Development
Built for scale with
Next.jsCloudflareTypeScript
Capabilities

Digital Offerings

Strategic technical solutions crafted to solve complex architectural challenges.

01

Real Estate Web Development (Costa Blanca)

02

Legacy Code Modernization

03

Page Speed Optimization Specialist

04

Senior Next.js & Svelte Contract Development

05

Custom CRM & Software Engineering

06

WordPress to Modern JS Migrations

01

Real Estate Web Development (Costa Blanca)

Bespoke property CRMs and custom property portals for local real estate agencies in Moraira, Javea, Calpe, Altea, and Torrevieja.

Journey

Experience & Background

Three decades of shipping software across multiple technology generations.
2018 - 2025

Full Stack Developer

MPL Enterprises

Developing and maintaining complex full-stack web solutions.

2009 - 2025

I.T. Manager / Web Developer

Lumsden Auctions

Managed IT infrastructure and developed custom web applications for auction management.

2009 - 2011

Senior Web Developer

Coast Digital

Built high-performance websites and digital solutions for a variety of clients.

2014 - 2014

Freelance Developer

Centigrade

Provided specialized development services on a project basis.

Academic
1993 - 1994

BTEC First in Information Technology

East Devon College

1993 - 1994

BTEC in Computer Studies

East Devon College

Network
Full Professional Resume

Let's connect
on LinkedIn

Connect for architecture inquiries, consulting, or full-stack opportunities.

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Portfolio

Featured Projects

A curated selection of digital products and high-performance applications.
01

Ben Cook Real Estate

Real Estate Ecosystem

Premium property platform with bespoke CRM for the Costa Blanca real estate market.

50% faster lead processing & higher organic search visibility
02

Studio T Casa

Beauty Salon

A beauty salon located within a stunning finca in Dolores, Alicante.

99/100 Lighthouse score & 30% more online bookings
03

Worldle

Game

Popular geography-based guessing game inspired by Wordle.

2M+ daily active users at peak
04

Teuteuf

WordPress Design / Development

Bespoke WordPress design and ecosystem development.

Perfect Core Web Vitals on an image-heavy portfolio
05

Statele

Game

Interactive US state-based geography guessing game.

500k+ monthly active users & high retention
06

Lumsden Auctions

Auction Management System

Full-scale auction management system with live bidding and automated cataloging.

40% increase in auction turnover through automation
Client Results
Firstly all I can say is Marc delivered on what he promised. He built my Property website and CRM from scratch. This was all done in the time it would usually take a team to do. I would fully Recommend Marc if there were stars to click it would be 5 stars for sure. *****
B
Ben CookDirector · Ben Cook Real Estate
Connect

Let's build together

Currently accepting new projects for remote full-stack development and architecture.
Phone / WhatsApp+34 627 191 675
LocationSpain · Remote worldwide
Available — Responds in 24h
Message

Prefer a call? Message on WhatsApp