Mainframe Assembler Developer

Contract Role - Mainframe Assembler Developer – Contract – Leeds/Halifax/Edinburgh/Hybrid – 12 Months Initial We are currently seeking a skilled and proactive Mainframe Assembler Developer to join a leading financial institution. You will play a key role in supporting and enhancing legacy systems critical to banking operations. The ideal candidate will have strong technical expertise in Assembler and related mainframe technologies, combined with solid experience in high-volume, regulated environments. Role Overview: Job Title: Mainframe Assembler Developer Location: Leeds/Halifax/Edinburgh/Hybrid (2 days per week onsite) Contract Type: Contract Duration: 12 months initially Sector: Banking Required Skills & Experience: Proven experience with IBM Mainframe Assembler (HLASM) development. Strong understanding of z/OS , JCL , TSO/ISPF , VSAM , and DB2 . Experience in the banking or financial services sector is highly desirable. Familiarity with COBOL , CICS , or PL/I is a plus. Solid problem-solving skills and attention to detail. Experience working in Agile or Waterfall environments. Excellent communication skills, both written and verbal. Nice to Have: Knowledge of regulatory and compliance requirements in the banking domain. Exposure to system modernization or migration projects. Experience with automated testing tools for mainframe environments. Please feel free to contact myself – Daisy Nguyen (dnguyen@gibbsconsulting.com/T: 0208 619 0877) at Gibbs Consulting for a confidential chat to know more details about the role. Please also note: Due to the volume of applications received for positions, it will not be possible to respond to all applications and only applicants who are considered suitable for interview will be contacted.

Location: Eastern England, GB

Posted Date: 5/12/2025