> Markdown version of [/jobs?country=BE&q=MAINFRAME](https://www.wearedevelopers.com/jobs?country=BE&q=MAINFRAME). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Developer Jobs Region: Belgium 40 jobs found matching "MAINFRAME" ## Mainframe Developer Natural/ADABAS - **Company:** EngiFlex - **Location:** Brussel, Belgium (Remote available) - **Contract:** Contract - **Published:** August 5, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1922815-mainframe-developer-natural-adabas) - [Apply](https://www.careerjet.be/jobad/bea8f0b5832283ee9336cdea359076af4f) ## SeniorAdministrator - Mainframe Automation Tools - **Company:** HCLTech - **Location:** Belgium - **Contract:** Permanent contract - **Published:** July 11, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1230043-senioradministrator-mainframe-automation-tools) - [Apply](https://be.indeed.com/viewjob?jk=35abc4c5ecf9b43b) ## Mainframe System Engineer - **Company:** Oliver James Associates Limited - **Location:** Brussel, Belgium - **Experience:** Expert - **Contract:** Permanent contract - **Published:** May 20, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/4325-mainframe-system-engineer) - [Apply](https://www.oliverjames.com/en/jobs/mainframe-system-engineer-4100/) ## Senior Mainframe Developer - COBOL / DB2 - **Company:** ITProposal - **Location:** Brussel, Belgium - **Experience:** Expert - **Contract:** Temporary contract - **Published:** August 13, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/2039574-senior-mainframe-developer-cobol-db2) - [Apply](https://www.careerjet.be/jobad/bec402cc5767f1666707bc1923d24feed9) ## Mainframe System Engineer - **Company:** Euroclear - **Location:** Belgium - **Experience:** Starter - **Contract:** Permanent contract - **Published:** June 15, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/749723-mainframe-system-engineer) - [Apply](https://be.indeed.com/viewjob?jk=96e28c93d0b9d3f4) ## Mainframe System Engineer - **Company:** UNION NATIONALE DES MUTUALITÉS SOCIALISTES-NATIONAAL VERBOND VAN SOCIALISTISCHE MUTUALITEITEN - **Location:** Brussel, Belgium (Remote available) - **Contract:** Permanent contract - **Published:** August 6, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1942160-mainframe-system-engineer) - [Apply](https://www.actiris.brussels/fr/citoyens/detail-offre-d-emploi/?reference=5918374) ## Mainframe Application Designer - **Company:** Sloka IT Solutions - **Location:** Brussel, Belgium - **Experience:** Expert - **Contract:** Temporary contract - **Published:** August 2, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1866269-mainframe-application-designer) - [Apply](https://www.adzuna.be/details/5823538997) ## Analist Programmeur Mainframe - **Company:** Solidaris Nationaal Verbond - **Location:** Brussel, Belgium (Remote available) - **Experience:** Experienced - **Salary:** €38,384.0 - €66,785.0 - **Contract:** Permanent contract - **Published:** July 24, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1412557-analist-programmeur-mainframe) - [Apply](https://www.vdab.be/vindeenjob/vacatures/74224463) ## Mainframe Developer - ADABAS/Natural & BS2000 Job ID: JP054980 - **Company:** ITProposal - **Location:** Brussel, Belgium - **Contract:** Permanent contract - **Published:** August 5, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1922612-mainframe-developer-adabas-natural-bs2000-job-id-jp054980) - [Apply](https://www.careerjet.be/jobad/bee7920b34c080aeca2fa849223b91420b) ## Mainframe Security Engineer - **Company:** Euroclear - **Location:** Belgium - **Contract:** Permanent contract - **Published:** June 12, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/297515-mainframe-security-engineer) - [Apply](https://be.indeed.com/viewjob?jk=42175a0f4511804b) ## Mainframe engineer - **Company:** SKYFALL IT - **Location:** Leuven, Belgium - **Experience:** Expert - **Contract:** Temporary to permanent - **Published:** August 5, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1922574-mainframe-engineer) - [Apply](https://www.vdab.be/vindeenjob/vacatures/74299629) ## Mainframe Application Designer 10870290 - **Company:** ITProposal - **Location:** Brussel, Belgium - **Experience:** Expert - **Contract:** Temporary contract - **Published:** July 30, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1490823-mainframe-application-designer-10870290) - [Apply](https://www.careerjet.be/jobad/be2a6513e4974b0315544637c48a1c4cd0) ## Functional / Data Analyst - Legacy & Data Migration Job ID: JP055049 - **Company:** Itproposal - **Location:** Aalter, Belgium - **Contract:** Permanent contract - **Published:** August 12, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/2029832-functional-data-analyst-legacy-data-migration-job-id-jp055049) - [Apply](https://be.engineering.jobs/nl/vacature/functional-data-analyst-legacy-data-migration-job-id-jp055049-7945632) ## Functional / Data Analyst Legacy & Data Migration Job ID: JP055049 - **Company:** ITProposal - **Location:** Brussel, Belgium - **Contract:** Permanent contract - **Published:** August 11, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/2017538-functional-data-analyst-legacy-data-migration-job-id-jp055049) - [Apply](https://www.adzuna.be/details/5836444147) ## Data Analyst - Mainframe & Datamigratie - **Company:** EngiFlex - **Location:** Brussel, Belgium (Remote available) - **Contract:** Contract - **Published:** August 13, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/2039555-data-analyst-mainframe-datamigratie) - [Apply](https://www.careerjet.be/jobad/bead5a5e8b90c7216c3d666dc59d4cd581) ## Data Analyst - Legacy, Mainframe & Datamigratie - **Company:** EngiFlex - **Location:** Brussel, Belgium (Remote available) - **Contract:** Contract - **Published:** August 13, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/2039554-data-analyst-legacy-mainframe-datamigratie) - [Apply](https://www.careerjet.be/jobad/be02353b999b4a3c37e0f65f1a00668e4c) ## Analist Customer Handling - **Company:** KBC Group NV - **Location:** Antwerpen, Belgium (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Published:** August 4, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1908096-analist-customer-handling) - [Apply](https://be.indeed.com/viewjob?jk=d554797f0ae99ec5) ## IT Continuity E2E Exercise Coordinator - **Company:** ITS Group - **Location:** Brussel, Belgium - **Experience:** Experienced - **Contract:** Permanent contract - **Published:** June 29, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/722704-it-continuity-e2e-exercise-coordinator) - [Apply](https://be.indeed.com/viewjob?jk=8ac0fc61f1c9469e) ## Test Analyst Life Insurance - **Company:** P&V Group - **Location:** Antwerpen, Belgium (Remote available) - **Contract:** Permanent contract - **Published:** July 26, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1444034-test-analyst-life-insurance) - [Apply](https://www.adzuna.be/details/5816049266) ## Senior Infrastructure & Cloud Architect - **Company:** Accenture - **Location:** Brussel, Belgium - **Experience:** Expert - **Contract:** Permanent contract - **Published:** July 29, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1473842-senior-infrastructure-cloud-architect) - [Apply](https://be.indeed.com/viewjob?jk=851ad185d937b1fa) ## IT Associate Engineer - **Company:** Euroclear - **Location:** Belgium - **Contract:** Permanent contract - **Published:** May 31, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/12341-it-associate-engineer) - [Apply](https://be.indeed.com/viewjob?jk=93bf6a26a56f9403) ## Senior Linux Systeembeheerder - **Company:** EngiFlex - **Location:** Antwerpen, Belgium - **Experience:** Expert - **Contract:** Contract - **Published:** June 8, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/296094-senior-linux-systeembeheerder) - [Apply](https://www.careerjet.be/jobad/be6349dd8b4a0a1984ea101f897d5f55a0) ## Test Analyst Life Insurance | vacature - **Company:** P&v Groep - **Location:** Antwerpen, Belgium (Remote available) - **Contract:** Permanent contract - **Published:** June 3, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/296289-test-analyst-life-insurance-vacature) - [Apply](http://www.insurance-boulevard.com/nl/careers/20249bab-9ffe-4eb7-b163-03a6acd86a9d/test-analyst-life-insurance-vacature-antwerpen-kdh-in-combinatie-met-thuiswerken-pv) ## Senior Infrastructure Migration Expert - **Company:** Accenture - **Location:** Brussel, Belgium - **Experience:** Expert - **Contract:** Permanent contract - **Published:** July 29, 2026 - [View job](https://www.wearedevelopers.com/jobs/ext/1473846-senior-infrastructure-migration-expert) - [Apply](https://be.indeed.com/viewjob?jk=61cc1dcfaca5f3dd) [Next page](https://www.wearedevelopers.com/jobs?country=BE&page=2&q=MAINFRAME) ## Filter by Country - [Austria](https://www.wearedevelopers.com/jobs?country=AT) - [Belgium](https://www.wearedevelopers.com/jobs?country=BE) - [Germany](https://www.wearedevelopers.com/jobs?country=DE) - [Spain](https://www.wearedevelopers.com/jobs?country=ES) - [France](https://www.wearedevelopers.com/jobs?country=FR) - [Italy](https://www.wearedevelopers.com/jobs?country=IT) - [Lithuania](https://www.wearedevelopers.com/jobs?country=LT) - [Netherlands](https://www.wearedevelopers.com/jobs?country=NL) - [Serbia](https://www.wearedevelopers.com/jobs?country=RS) - [UK](https://www.wearedevelopers.com/jobs?country=UK) - 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