Mainframe Assembler Developer

Gibbs Consulting IT Services & Solutions; Greater London; Hybrid; GBP 50,000 - 90,000; Full time

Job summary

An established industry player is looking for a skilled Mainframe Assembler Developer to enhance critical banking legacy systems. This role requires strong expertise in Assembler and mainframe technologies, along with experience in the financial sector. You will be part of a dynamic team, contributing to system modernization projects while ensuring compliance with banking regulations. If you are a proactive problem-solver with excellent communication skills, this is a fantastic opportunity to make a significant impact in a vital sector. Join a forward-thinking organization where your contributions will be valued and recognized.

Qualifications

• Proven experience in IBM Mainframe Assembler development is essential.
• Strong knowledge of banking regulatory and compliance requirements is a plus.

Responsibilities

• Support and enhance legacy systems critical to banking operations.
• Work in high-volume, regulated environments with a focus on quality.

Skills

IBM Mainframe Assembler (HLASM)

z/OS

JCL

TSO/ISPF

VSAM

DB2

COBOL

CICS

PL/I

Agile

Waterfall

Problem-solving

Communication Skills

Job description

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 Daisy Nguyen at [e-mail] or T: 0208 619 0877 at Gibbs Consulting for a confidential chat to know more details about the role.

Please 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.

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Information Technology
• Banking