Oracle Developer/Middleware Engineer

Job Description

We are looking for an Oracle Developer & Middleware Engineer to support mission‑critical Oracle applications in a 24/7 multi‑customer environment. You will work with PL/SQL, Oracle APEX, Oracle Forms, ORDS, WebLogic and OSB to ensure reliable integrations, stable performance and smooth deployments, collaborating closely with the Oracle DBA team in a highly industrialized production setting.

Responsibilities:

• Design and evolve Oracle architectures — Shape PL/SQL, APEX, Forms, ORDS, WebLogic and OSB components, ensuring robust integration and scalable designs;

• Perform advanced L3 troubleshooting — Resolve complex application, middleware and SQL issues through deep‑dive analysis and cross‑team collaboration;

• Optimize performance — Improve response times and reliability through SQL tuning, PL/SQL optimization, indexing strategies and workload analysis;

• Ensure HA/DR readiness — Align applications and middleware with Data Guard, RAC, failover and recovery requirements;

• Lead major changes — Drive upgrades, migrations, deployments and modernization initiatives with safe rollback and controlled execution;

• Support on‑call operations — Intervene in critical incidents to restore service quickly in a 24/7 production environment;

• Automate and industrialize — Build scripts and tools to streamline deployments, configuration, testing and recurring operational tasks;

• Apply secure development practices — Enforce strong authentication, authorization, encryption and auditing across all Oracle components;

• Document and share expertise — Maintain clear technical documentation and contribute to team knowledge and mentoring.

Qualifications

• 5–10+ years working with PL/SQL, SQL, APEX, Forms, ORDS, WebLogic and OSB in business‑critical environments;

• Strong understanding of Oracle middleware runtime behavior, deployments, APIs and integration flows;

• Multi‑customer experience (Background in MSP, outsourcing or shared‑service environments is highly valued);

• Familiarity with schemas, grants, transactions, locking, Data Guard/RAC constraints and backup/recovery implications;

• Performance tuning capability (skilled in execution plan analysis, indexing strategies, statistics, bind variables and diagnosing SQL/PLSQL performance issues);

• Ability to interpret AWR, ASH, ADDM, SQL Monitor and correlate application/middleware behavior with DB, WebLogic, ORDS and OSB metrics;

• Experience with controlled deployments, rollback scripts, data migrations and environment promotion;

• Linux and runtime troubleshooting (comfortable with AIX/RHEL environments, shell scripting, log analysis and runtime investigation);

• Knowledge of WebLogic domains, managed servers, JDBC data sources, OSB flows and ORDS runtime behavior;

• Experience with Git, CI/CD tools, SQL Developer, SQLcl, APEX export/import, Forms and ORDS deployment automation;

• Analytical, calm under pressure and collaborative in multi‑team environments as well as strong written and verbal communication with technical and non‑technical stakeholders;

• English required; French or Dutch are a plus.