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Eps Developer; IR35). Hybrid

Job in London, Greater London, W1B, England, UK
Listing for: Hawksworth
Full Time, Contract position
Listed on 2026-06-23
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer, Data Security, IT Consultant
Salary/Wage Range or Industry Benchmark: 125000 - 150000 GBP Yearly GBP 125000.00 150000.00 YEAR
Job Description & How to Apply Below
Position: Contract BASE24-eps Developer (Inside IR35). 12-months  Hybrid

Hawksworth are hiring! We are recruiting for a trusted global client who are looking for a Contract BASE
24-eps Developer (Inside IR35).

Rate: Negotiable and to be discussed, but good market rates

Term: 12 months initially, hopeful that will extend.

Working: Hybrid, x3 days in the office, x2 days remote per week

The job:

This is a senior, experienced BASE
24-eps Developer position to provide end-to-end development across payment systems with a focus on modernizing and evolving the BASE
24 platform.

In this role, you will act as BASE
24-eps Developer, customizing different BASE
24-eps components based on the requirements, Scripting, including the migration of from BASE
24-classic to BASE
24-eps.

Responsibilities.
  • Own end-to-end Development for BASE
    24-eps system.
  • Understand the Customer requirements and Prepare the Design/Functional Specifications if necessary.
  • End to end Unit Test Plan with execution strategy which includes all the development related core changes.
  • Prepare the Implementation plan for Test & Production Systems.
  • Hands-on involvement in BASE
    24-classic to BAS
    24-eps migration programmes.
Required skills & experience:
  • Strong experience and solid understanding of BASE
    24-eps development and transaction processing flows.
  • Understanding of Script uses and its customization.
  • Experience working on large-scale payment switch system (ATM, POS , SWITCH)
  • Deep Knowledge of :
  • IS08583 messaging (VISA/LINK) , Journals, TDEs, Tokens, STM/PSTM.
  • BASE
    24-eps system configuration and control, Layers, Integrated Server, SAF/Context Manager, Database Tables, Perl make.
  • PATHWAY, TACL, Enscribe, C/C++, Java, XPNET/NCPCOM.
  • Experience in:
  • Development, Scripting & Compilations.
  • Transaction monitoring, debugging, inspect and configurations.
  • Strong understanding of :
  • BASE
    24-eps Configurations (Message Delivery, Prefix, Router, Authorization, HISO/BICI, Acquirer, Issuer, Process Control, Environments Management), Trace, DALCI
  • Web Services configuration and controls
  • Solid understanding of HSM integration ,key management, PIN block formats and cryptography in a payment context.
  • Hands on experience with payment security standards: PCI DSS,3-D Secure, tokenization and EMV.

If you are a BASE
24-eps Developer, we would like to hear from you so please apply.

You can also reach out to me at

#J-18808-Ljbffr
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