The financial payments sector is rapidly evolving, and expertise in high‑throughput transaction systems is in high demand. Tandem (HP NonStop) platforms power some of the world’s most resilient ATM and POS networks, making specialists in this niche extremely valuable. This Tandem Developer role offers a chance to shape critical payment applications on cutting‑edge infrastructure.

Job Summary

We are seeking a seasoned Tandem Developer to design, develop, test, and maintain ATM transaction applications on HP NonStop systems. The role involves working on transaction switching, payment processing, performance tuning, and close collaboration with cross‑functional teams to deliver scalable, secure financial solutions.

Top 3 Critical Skills Table

Interview Preparation

1. Explain how you would troubleshoot a performance bottleneck in a Tandem C/C++ ATM application.
   What the interviewer is looking for: Understanding of Tandem profiling tools, memory management, and I/O optimization.
2. Describe the end‑to‑end flow of an ISO8583 transaction on a Base24 system.
   What the interviewer is looking for: Knowledge of message structure, routing, and settlement processes.
3. How do you implement atomicity and rollback in a non‑stop environment using Enscribe or SQL/MP?
   What the interviewer is looking for: Experience with Tandem’s transaction control mechanisms and recovery features.
4. What are the key differences between Base24 Classic and Base24‑eps, and how would you migrate functionality?
   What the interviewer is looking for: Insight into product versions, API changes, and migration strategies.
5. Give an example of how you applied Agile/Scrum practices to a legacy Tandem project.
   What the interviewer is looking for: Ability to blend modern development processes with legacy system constraints.

Resume Optimization

• Tandem NonStop
• TACL
• TAL
• COBOL
• C/C++
• ATM/POS systems
• Base24
• ISO8583
• Enscribe
• SQL/MP

Application Strategy

When reaching out to the recruiter, send a concise email that greets the recipient, attaches your resume, and clearly highlights your most relevant experience. Make sure to mention related skills you possess, such as Tandem NonStop development and ATM/POS transaction processing, and reference any projects where you built or optimized payment applications. Tailor your message to show how your background maps directly to the responsibilities listed in the job description.

Career Roadmap