Analyst / Developer Mainframe (Cobol / PL1)
First seen by Alion on Oct 28, 2026.
🖥️ Mainframe Analyst Developer (Medior / Senior)
Ready to take ownership of complex systems and contribute to meaningful digital transformation?
We're looking for an experienced Mainframe Analyst Developer who enjoys designing reliable, scalable solutions and ensuring the continuity of critical applications that serve thousands of users every day.
This is an opportunity to join a human-centered organization where your expertise is valued, your ideas make a difference, and your work-life balance truly matters.
🎯 Your role
As a key member of our development team, you will:
- Lead the technical analysis, design, development, and maintenance of core business applications
- Work on multiple layers - from business logic to system integration and user interfaces
- Translate functional needs into robust, long-term technical solutions
- Ensure the stability, performance, and quality of existing systems while contributing to modernization initiatives
- Collaborate closely with internal teams and act as a technical reference for less experienced developers
- Document and communicate your work clearly to both technical and business stakeholders
🧠 Your profile
- Bachelor's or Master's degree in IT, Computer Science, or equivalent experience
- 5+ years of experience in software development, ideally with Mainframe systems
- Proficient in procedural programming languages such as C, Cobol, or PL/1
- Solid understanding of relational databases (SQL, DB2, etc.)
- Languages:
-
- Strong written and spoken command of French and/or Dutch
- Good working knowledge of technical English
Additional assets:
- Experience with z/OS, PL/1, CICS, JCL, SOA/ESB, TWS, Web Services, or Java.
- Knowledge of accounting principles or financial applications.
- Strong analytical and problem-solving mindset with a focus on system reliability and performance.
💡 What defines you
- You're results-oriented and motivated by technical excellence.
- You value quality, precision, and structured work.
- You're autonomous but thrive in a collaborative environment.
- You take initiative and enjoy improving processes and solutions.
- You communicate clearly and enjoy being a trusted technical advisor.
💼 What we offer
- Permanent contract with a competitive salary aligned with your experience
- Meal vouchers, year-end bonus, group and hospital insurance
- A 35-hour work week promoting true work-life balance
- A stable and friendly work environment where your expertise has real impact and your career can grow
💬 Apply Now
If you're an experienced Mainframe Developer who wants to work on challenging, business-critical systems in a supportive environment, we'd love to meet you.
Company descriptionEstablished in 2002, Oliver James is a global recruitment partner with specialist teams in the Financial Services, Professional Services, and Commerce & Industry sectors.
Our values of innovation, passion, adaptability, partnership, respect and excellence underpin the working practices we adopt across 15 offices worldwide. These behaviours are showcased by expert consultants who place up to C-suite level talent in permanent and interim positions through both contingency and executive search solutions.
The key to this service is our proactive search methodology; before we start working in a particular area, we spend a minimum of 12 months mapping the market. This ensures thorough knowledge of the talent pool, excellence in delivery and long-term value - all part of our commitment to building lasting relationships.
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