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Focus area

Oracle APEX development from Cologne

We have built and maintained Oracle APEX applications since 2005, backed by more than 25 years of PL/SQL, and you talk directly to the developers who know your application.

Oracle APEX since 2005: our core business in the Oracle world

Oracle Application Express is not a side product for us. Since 2005 it has been the tool we use to build business applications for insurers, utilities, public administration and mid-sized companies. Before that, from 1998, we worked with Oracle Forms, Designer and PL/SQL. That depth in data modelling and in the database is what sets us apart from agencies offering APEX as one of twenty tools.

Two of our references have been in production on APEX for years: the time-tracking system TeamTime and the commercial suite oxalis Unique. Both show what APEX is good at: large data volumes, fine-grained permissions, reports and workflows that run in the browser without any client installation.

What we do for you

New development. We design the data model and the application together with your domain experts. Business logic lives in PL/SQL packages, the user interface in APEX. That keeps the application maintainable even when UI technologies change.

Extension and takeover. Many APEX applications have grown over years and the original developer is no longer available. We take over such applications, document them and keep developing them. No rebuild, no downtime.

Upgrades. Old APEX versions often run on databases that are dropping out of support. We bring application and database to a supported level and use the opportunity to modernise themes and pages.

Operations and support. On request we look after your APEX application permanently: troubleshooting, small enhancements, monitoring. You talk to the same developers who know the code.

How we work

You talk directly to the developers, not to a project manager in between. We clarify requirements in short sessions with your business departments, and you see progress continuously in a test environment. We use AI tools for code generation, tests and reviews; design and responsibility stay with experienced engineers.

When APEX is no longer enough

Not every application should stay on APEX forever. If Oracle licence costs weigh on you or you want more independence, we show you the path to an open stack: PostgreSQL, Go, Vue.js or Flutter. With EasyFlow Business we have taken exactly that path ourselves, migrating a mature APEX application to open source. Read more on the PostgreSQL migration page.

Frequently asked questions

When is Oracle APEX the right choice?

When your data already lives in an Oracle database and you need data-heavy business applications in the browser: forms, reports, workflows, analyses. APEX runs inside the database, needs no additional middleware and is included in the Oracle licence. For applications without an existing Oracle estate we usually recommend PostgreSQL and an open stack.

Can you take over an APEX application somebody else built?

Yes. We start with an inventory: APEX version, data model, PL/SQL packages, interfaces, known issues. You then get an assessment of what can be stabilised quickly and what should be reworked over time. Taking over running applications has been part of our daily work for years.

How does an upgrade to a current APEX version work?

We check the application and the database for deprecated components, test the upgrade on a copy and resolve deviations before the production system is touched. Depending on the age of the application this is a modest step or the moment to modernise themes and page layout at the same time.

What does an APEX application cost at oxalis?

It depends on scope and starting point, so we do not quote flat rates. We bill actual hours worked, with time tracking you can inspect. Before the start you receive an effort estimate with its assumptions so you can decide.

Do you work remotely or only in Cologne?

Both. Our office is in Cologne, and many clients are served entirely remotely. For workshops and acceptance tests we are happy to come on site.

More focus areas

Oracle Forms modernisation

Inventory, upgrade or migration to APEX and open source. We have known Forms since 1998 and made the transition ourselves.

PostgreSQL & Oracle migration

Schema and PL/SQL migration to PostgreSQL, Go back ends, PostGIS. We know both databases and tell you when the switch pays off.

AI-assisted development

What AI tools actually do in our projects, what they do not do, and why experienced developers matter more because of them.

Hosting & operations

Operation of your application on European servers: monitoring, backups, updates, a named contact. Without dependency on cloud giants.

Let's talk

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