Tandem Developer

Location: Mexico City (MX)

Experience Level: Senior

Description

At Sequoia Connect, we are a Talent-First Technology Ecosystem that redefines how elite professionals interact with the global digital landscape. We move beyond traditional models to act as a catalyst for the top 1% of global talent, connecting human potential with complex industrial execution. By joining our inner circle, you are not simply taking a position; you are aligning with a strategic partner dedicated to updating your "Human OS" and accelerating your growth through world-class, high-impact projects.

We are currently partnering with a global IT powerhouse that represents the connected world through innovative, customer-centric experiences. As a USD 6 billion organization and one of the top 7 IT service providers globally, our client empowers over 1,200 global customers—including several Fortune 500 companies—to "Rise™." With a massive network of 163,000+ professionals across 90 countries, they are at the absolute forefront of digital transformation, leveraging next-generation technologies such as 5G, AI, Blockchain, and Quantum Computing.

This is your chance to thrive in a workplace recognized as one of the most sustainable corporations in the world. You will join an environment that values innovation and societal impact, working on end-to-end digital transformation projects for global leaders. If you are a driven professional looking for global career opportunities and exposure to high-impact projects within an international network of expertise, this is where you belong.

We are currently searching for a Tandem Developer:

Responsibilities

• Design, develop, and maintain backend components on HPE NonStop (Tandem), adhering strictly to change control practices, coding standards, and platform-specific performance considerations (I/O, locking, concurrency).
• Analyze and resolve complex defects in legacy systems, performing transaction traceability, fault diagnosis, and corrective adjustments with minimal impact to ensure data integrity and operational continuity.
• Implement and maintain integrations with external systems using available NonStop mechanisms (services, flat files, message queues, TCP/IP sockets, processes), guaranteeing data validation, error handling, and traceability.
• Query, tune, and adjust NonStop databases (SQL/MP, SQL/MX, Enscribe), optimizing queries, structures, and access paths to maintain optimal response times and stability under heavy transactional loads.
• Document transaction flows, business rules, integration contracts, and operating procedures.
• Collaborate effectively with modern engineering teams (e.g., Java/Kafka environments) to map core system data and business rules into canonical models for enterprise-wide use.
• Automate repetitive operational and maintenance tasks using scripting and standard utilities within the NonStop ecosystem.

Requirements

• Design, develop, and maintain backend components on HPE NonStop (Tandem), adhering strictly to change control practices, coding standards, and platform-specific performance considerations (I/O, locking, concurrency).
• Banking Sector Experience: 3+ years of experience working within the banking or financial services industry, understanding its rigorous standards for security and transactional integrity.
• Analyze and resolve complex defects in legacy systems, performing transaction traceability, fault diagnosis, and corrective adjustments with minimal impact to ensure data integrity and operational continuity.
• Implement and maintain integrations with external systems using available NonStop mechanisms (services, flat files, message queues, TCP/IP sockets, processes), guaranteeing data validation, error handling, and traceability.
• Query, tune, and adjust NonStop databases (SQL/MP, SQL/MX, Enscribe), optimizing queries, structures, and access paths to maintain optimal response times and stability under heavy transactional loads.
• Document transaction flows, business rules, integration contracts, and operating procedures.
• Collaborate effectively with modern engineering teams (e.g., Java/Kafka environments) to map core system data and business rules into canonical models for enterprise-wide use.
• Automate repetitive operational and maintenance tasks using scripting and standard utilities within the NonStop ecosystem.

Desired 

• Experience collaborating on modernization projects (e.g., bridging legacy Tandem systems with modern Java/Kafka event-driven architectures).
• Familiarity with cloud-native foundations or AI coding assistants.

Languages

• Advanced Oral English.
• Advanced Spanish.

Note:

• Hybrid

If you meet these qualifications and are pursuing new challenges, start your application on our website to join an award-winning employer. Explore all our job openings | Sequoia Career’s Page: https://www.sequoia-connect.com/careers/

Requirements