Web applications
Portals, dashboards and internal tools in Laravel. Built to scale, well tested and maintainable for the long run.
PHP · Laravel · Livewire
Discuss this projectFreelance software developer
Web applications, APIs and apps that just work.
I'm Robin Speerstra. At Appspark I build custom software for companies that want one dedicated developer: from first idea to running in production.
01 — Services
From backend to app store, under one roof.
APIs & integrations
Designing and building REST APIs and connecting systems: payment providers, accounting software, CRMs and external platforms.
REST · Webhooks · OAuth
Discuss this projectMobile apps
Native-feeling apps for iOS and Android from a single codebase, including release to the App Store and Google Play.
Flutter · Expo · .NET MAUI
Discuss this projectDevOps & server management
Setting up and managing servers, containerized environments, automated deployments, caching and queues, so your application runs fast and stable.
Docker · CI/CD · Redis
Discuss this projectHave an idea, or an existing application that needs to be better?
Request a free quoteAI & automation
Let AI do the repetitive work.
I connect AI models such as Claude and ChatGPT to your own systems, so you can automate recurring work: sorting and answering email, processing documents, generating text and images, and processes that are still done by hand.
Discuss an AI project- 01Claude & ChatGPT in your own software
- 02Process documents, email and data automatically
- 03Generate images with AI
Case studies
What I have built.
Original Buddhas
A web shop for antique Buddha statues, in three languages.
A custom web shop in three languages for one-of-a-kind antique statues, with fast search, marketplace and email marketing integrations, and AI help in the admin.
Read the case
Radiation protection consultancy
Radiation shielding, calculated live in 2D and 3D.
A web application that calculates the shielding of X-ray and CT rooms live to NCRP 147, with a 3D view of the dose and a report with every calculation.
Read the case
Fidessa
Case · Accounting · Exact Online · AI
Fidessa
Clients' bookkeeping in one place, with an app and AI.
A platform around Exact Online with a web portal, a mobile app to scan receipts and answer questions, and an AI connection for Copilot and Claude.
Read the case02 — Stack
Proven tools, chosen deliberately.
I work with mature, widely supported technology. That keeps your software reliable and easy to hand over.
Backend
- PHP 8
- Laravel
- Livewire
- WordPress
- WooCommerce
- REST API's
- Composer
- PHPUnit / Pest
Data & caching
- MySQL
- MariaDB
- PostgreSQL
- Supabase
- Redis
- Queues & jobs
- Elasticsearch
Mobile
- Flutter
- Dart
- Expo
- React Native
- TypeScript
- C#
- .NET MAUI
AI
- Claude
- ChatGPT / OpenAI
- Image generation
- Process automation
Infra & tooling
- Docker
- Docker Compose
- Nginx
- Linux
- Git
- CI/CD
03 — Process
Short lines, clear agreements.
-
1
Intro
We discuss your idea, goals and constraints. No obligation, online or on site.
-
2
Plan & quote
A concrete proposal with scope, timeline and price. No surprises afterwards.
-
3
Build
Development in short iterations. You see working versions regularly and can adjust course.
-
4
Launch & support
Delivery and deployment, followed by maintenance, monitoring and further development.
Working together
Project based
A defined project with fixed scope and clear delivery.
Hourly contract
Extra capacity for your existing team, remote or partly on site.
Maintenance & support
Updates, security and further development of existing applications.
04 — Contact
Got an idea or a project? Let's talk.
Tell me briefly what you want to build. I usually reply within one working day.
Robin Speerstra
Software developer