Company description Publicis Sapient is a digital transformation partner helping established organizations get to their future, digitally-enabled state, both in the way they work and the way they serve their customers. We help unlock value through a start-up mindset and modern methods, fusing strategy, consulting and customer experience with agile engineering and problem-solving creativity. United by our core values and our purpose of helping people thrive in the brave pursuit of next, our 20,000+ people in 53 offices around the world combine experience across technology, data sciences, consulting and customer obsession to accelerate our clients' businesses through designing the products and services their customers truly value.
Overview We are looking for a
Senior COBOL & RPG Developer to join our mainframe modernization team, with a focus on
supporting cloud-native development teams during the migration of legacy systems to modern platforms. You will play a
critical liaison role, bringing deep expertise in COBOL, RPG, JCL, and related mainframe technologies to help cloud engineers interpret, understand, and replatform complex business logic and batch processes.
This is a highly collaborative role, ideal for someone who thrives at the intersection of legacy and modern technology stacks.
ResponsibilitiesYour Impact: - Analyze existing COBOL, RPG, JCL, and related legacy codebases to extract business logic, data flows, and processing rules.
- Work closely with cloud-native development teams (e.g., Java, Python, React js) to translate mainframe logic into modern equivalents.
- Participate in technical workshops and design sessions to explain legacy code functionality and dependencies.
- Support data migration efforts by helping interpret file structures (VSAM, flat files), database mappings (DB2, IDMS), and batch processing flows.
- Collaborate with architects and engineers to identify appropriate modernization strategies (replatform, refactor, rewrite).
- Help identify edge cases, hidden dependencies, or potential risks in the legacy code.
- Assist in validating migrated functionality against original mainframe behaviour.
- Create or contribute to technical documentation capturing legacy logic, interfaces, and assumptions.
Your Skills & Experience: - Hands-on experience with COBOL, RPG, JCL, VSAM, and mainframe development tools.
- Strong understanding of AS/400 or IBM iSeries environments (for RPG support).
- Familiarity with DB2, IDMS, and file-based data processing.
- Solid experience working on large, business-critical mainframe systems.
- Proven ability to analyze, debug, and document complex legacy applications.
- Experience working on mainframe migration or modernization projects.
- Excellent communication and collaboration skills - ability to explain legacy code clearly to modern engineers.
- Experience with tools such as File-Aid, Xpeditor, DMLO, CA7, ChangeMan, or equivalent.
Qualifications- Exposure to cloud environments (e.g., Azure, AWS, or GCP) and modern technologies like microservices, APIs, or event-driven architectures.
- Experience in hybrid teams involving legacy and cloud modernization.
- Familiarity with API integration, batch-to-stream conversion, or legacy wrapper patterns.
- Bachelor's degree in Computer Science, Engineering, or related field.
Additional informationBenefits of Working Here - Flexible vacation policy; time is not limited, allocated, or accrued
- 16 paid holidays throughout the year
- Generous parental leave and new parent transition program
- Tuition reimbursement
- Corporate gift matching program
Pay Range: $130,000 - $180,000
The range shown represents a grouping of relevant ranges currently in use at Publicis Sapient. Actual range for this position may differ, depending on location and specific skillset required for the work itself.
As part of our dedication to an inclusive and diverse workforce, Publicis Sapient is committed to Equal Employment Opportunity without regard for race, color, national origin, ethnicity, gender, protected veteran status, disability, sexual orientation, gender identity, or religion. We are also committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If you need assistance or an accommodation due to a disability, you may contact us at or you may call us at +1-.
Your information will be kept confidential according to EEO guidelines.