Senior Connex Developer

. Implement new software features and maintain existing mission‑critical codebases .

Posted 3/12/2026full-time🇫🇷 FranceSeniorWebsite

Tools & technologies

SDLCSQLSwitchingTCP/IP

Key responsibilities & impact

Implement new software features and maintain existing mission‑critical codebases
Follow and improve development workflows, documentation and processes
Perform peer and formal code reviews
Develop and execute unit tests to ensure functionality and performance
Take part in architectural discussions as part of the Connex architecture group
Support solution design and contribute to pre‑sales technical discussions
Report on progress, incidents and development efforts regularly
Ensure alignment to Worldline’s SDLC and development framework.

What you’ll need

Extensive Guardian administration experience
Strong expertise in Guardian HPE NonStop design & development
Proficiency with TAL, native TAL, COBOL, TACL and C
Pathway knowledge (essential)
Strong understanding of algorithms, libraries, SQL and TCP/IP
Experience with intercept processing (e.g., DRnet, SecurDPS)
Understanding of at least one HSM vendor i.e. Atalla
Experience providing 2nd and 3rd level support
Excellent communication, problem‑solving and stakeholder skills.
Experience with high‑volume, high‑availability EFT or transaction processing systems
Previous work in payments or financial switching environments.

Comp & perks

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Guardian administrationGuardian HPE NonStop designTALnative TALCOBOLTACLCSQLTCP/IPintercept processing

Soft Skills

communicationproblem-solvingstakeholder skills