Integrations with popular systems
Exact Online, Twinfield, Mollie, Stripe, SendGrid, iCal, Google Workspace — Paceline has built the most common integrations before and knows where the pitfalls are.
Build an API integration
Your systems don't talk to each other. We fix that.
From accounting package to payment platform, from planning to customer portal — if you want two systems to communicate, we build the integration. Reliable, well-documented and maintainable.
Why “Paceline”?
A paceline is a group of riders taking short turns at the front: high pace, faster together than anyone alone. That's how we build software — short iterations, visible progress every week.
Tap the riders for an attack
Custom APIs and webhooks
Does your supplier or customer have their own API? We build the integration to specification, including authentication, error handling and logging — so you always know whether data arrived correctly.
Maintainable and documented
An integration is not finished at delivery. Paceline ensures the code is readable and keeps API changes tracked, so you always know what is passing back and forth.
Services
Everything a web application needs
From first sketch to a running production environment — under one roof.
Custom web applications
Complete Rails applications that do exactly what your process needs — from a sleek web app to full-fledged business software. Not an off-the-shelf package that almost fits, but software that grows with your organisation.
Payments & webhooks
Stripe, iDEAL and Bancontact, including webhooks that process payment status reliably. From one-off payments to recurring invoicing flows.
Member & content platforms
Web applications with roles and permissions: from a coaching academy to a client portal. Everyone sees exactly what is meant for them.
Integrations & APIs
Connections with calendars (iCal), maps, PDF generation or your existing systems. Data flows automatically to where it's needed.
Hosting, deploys & maintenance
Docker containers on European servers — your data stays within the EU, no US cloud. With monitoring, updates and daily cloud backups that keep 30 days of snapshots, so your database is always safe — and changes go live in minutes, not months.
Websites & restyling
Got a site that feels dated? We bring it right back up to speed with a fresh, modern restyling built to the latest web standards — fast, accessible and pixel-sharp on every screen.
Modern UX without heavy frameworks
Fast, accessible interfaces built with Hotwire (Turbo + Stimulus). The smoothness of an SPA, without the complexity and maintenance burden.
Web shops & e-commerce
Full-fledged web shops in Rails: a product catalogue with variants and stock, a smooth cart and a secure checkout. Including a gated admin backend with two-factor authentication — from storefront to order fulfilment.
AI & MCP integrations
Make your data securely available to AI systems. Alongside classic REST APIs we build MCP servers (Model Context Protocol), letting assistants like Claude, Copilot and ChatGPT work directly with your application — under your control, with your roles and permissions.
Portfolio
Work that's live
No demos or mockups — from our own business software to websites for clients, all really in production.
MeSyncFlow
Business support software you configure yourself
Ruby on Rails
Hotwire
Multi-tenant
Workflows
View case: MeSyncFlow
View live
Club Academy
Website and learning environment for sports clubs
Ruby on Rails
Roles & permissions
iCal
Media
View case: Club Academy
View live
RouteFrame
From GPX ride to museum-grade poster
Stripe
PDF generation
Leaflet
i18n
View case: RouteFrame
View live
Red Hippo
A cinematic one-pager for a rock band
HTML/CSS/JS
One-pager
Cinematic
Responsive
View case: Red Hippo
View live
20+
years proven, future-proof
Full-stack
from database to interface
100%
built and managed in-house
Approach
Four turns to production
Clearly scoped, steady pace, always in sight of where we stand.
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1
Getting to know you
Free and without obligation. All the room to go through your ideas, wishes and process — and explore together where software can make the difference.
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2
Scope & quote
A clear scope with a fitting quote: a fixed price where possible, an honest time estimate where bespoke work needs room. You know upfront where you stand.
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3
Building in short turns
Short iterations with visible results every week. Course corrections are always possible — keeping the direction sharp.
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4
Launch & maintenance
Deploy to production, monitoring and further development. One point of contact, also after launch.
Frequently asked questions
What if the external API is poorly documented?
That happens more often than you'd think. Paceline works with what is available, tests thoroughly and builds robust error handling so your system doesn't break on a timeout or unexpected response.
Can you take over an existing integration that has stopped working?
Yes. We start with an analysis of the existing code and API documentation, find the cause and repair or rebuild the integration.
How long does it take to build an API integration?
A simple integration with one endpoint is ready in one to two weeks. More complex integrations with multiple data flows and error handling take two to four weeks.
About Paceline
Why work directly with the developer?
Paceline Software builds custom web applications from Someren, in the Eindhoven region — from modern websites to complex ERP and maintenance-planning (MJOP) systems — and brings that experience together in its own products like MeSyncFlow and RouteFrame. Small and independent, with deliberately few layers between you and the code.
Paceline Software
Software for the long run, built at pace.
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Direct contact
You talk directly to the developer who builds your software. No account managers, no translation layers, no noise.
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Proven technology
Ruby on Rails and Hotwire: mature, maintainable technology that has been running production for twenty years — and will be ten years from now.
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One point of contact
From first pixel to deploy: one steady point of contact who oversees the whole project and is accountable for the result — no handoffs between departments.
Contact
Book an intro call
Briefly describe what you have in mind — we'll respond within one business day.
Prefer to email directly? info@pacelinesoftware.nl