> Markdown version of [/jobs/ext/2679968-sr-engineer-mainframe-and-aws-integration-engineer](https://www.wearedevelopers.com/jobs/ext/2679968-sr-engineer-mainframe-and-aws-integration-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Sr. Engineer - Mainframe and AWS Integration Engineer

- **Company:** WIDENET CONSULTING, LLC
- **Location:** Washington, DC, United States (Remote available)
- **Experience:** Expert
- **Salary:** $145,600.0 - $153,920.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Amazon Web Services, Amazon S3, Business Logic, Customer Information Control System (CICS), COBOL (Programming Language), IBM DB2, Amazon DynamoDB, Job Control Language (JCL), Python (Programming Language), Mainframes, Operational Data Store, Amazon Simple Notification Service (SNS), Systems Integration, Virtual Storage Access Methods, Transaction Processing (Computing), State Machines, Generative AI, Servicebus, Amazon Relational Database Service, AWS Data Analytics, Real Time Data, Functional Programming, Api Gateway, Restful APIs, Amazon Simple Queue Service (SQS)
- **Published:** September 2, 2026
- **Apply:** https://widenet-consulting.com/openings/7023/#apply-now

## About the Role

* Strong, hands-on COBOL, CICS, DB2, VSAM, and JCL experience.
 * Strong Python development skills.
 * Strong AWS engineering experience with services such as Lambda, API Gateway, S3, Step Functions, EventBridge, SQS, SNS, DynamoDB, and RDS/Aurora.
 * Experience building CICS webservice, REST APIs and event-driven integrations.
 * Strong AWS data-engineering fundamentals.
 * Experience developing and supporting business-critical mainframe systems.
 * Ability to understand complex legacy business logic and implement modern integrations end to end.

Preferred Skills

 * Vantage or similar mainframe-based annuity policy administration experience.
 * DB2-to-AWS or near-real-time data-integration experience.
 * Assembler experience.
 * Generative AI, RAG, or Amazon Bedrock experience.

## Description

Hands-on senior engineer to extend and integrate a mainframe-based annuity policy administration system with AWS. The engineer will participate in architecture discussions and implement solutions end to end, with the technical lead providing final design direction., * Develop and support applications using COBOL, CICS, DB2, VSAM, and JCL.

 * Build Python-based APIs, integrations, and automation on AWS.
 * Develop real-time and event-driven integrations supporting straight-through transaction processing.
 * Implement transaction validation, tracking, idempotency, retries, reconciliation, and monitoring.
 * Partner with a data specialist to build an Operational Data Store on AWS sourced primarily from DB2, with limited VSAM data.
 * Contribute to initial loads, near-real-time ingestion, transformations, validation, and data reconciliation.
 * Support testing, deployment, documentation, observability, and production troubleshooting.


## Related Videos

- [Data Fabric in Action - How to enhance a Stock Trading App with ML and Data Virtualization](https://www.wearedevelopers.com/videos/253-data-fabric-in-action-how-to-enhance-a-stock-trading-app-with-ml-and-data-virtualization)
- [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob)
- [WeAreDevelopers LIVE - CSS is DOOMed](https://www.wearedevelopers.com/videos/1838-wearedevelopers-live-css-is-doomed)
- [Building Systems that Last](https://www.wearedevelopers.com/videos/1389-building-systems-that-last)
- [Hate organising your photos? Try it with 5 Terabytes](https://www.wearedevelopers.com/videos/79-hate-organising-your-photos-try-it-with-5-terabytes)
- [30 powerful AWS hacks in just 30 minutes: Boost your developer productivity](https://www.wearedevelopers.com/videos/1624-30-powerful-aws-hacks-in-just-30-minutes-boost-your-developer-productivity)

## Related Articles

- [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again)
- [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers)
- [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)
- [Dev Digest 162: AI careers, MCP, AWS best practices & floppy sweaters](https://www.wearedevelopers.com/magazine/571-dev-digest-162-ai-careers-mcp-aws-best-practices-floppy-sweaters)
- [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)
- [Dev Digest 132 - Binging WADFlix?](https://www.wearedevelopers.com/magazine/473-dev-digest-132-binging-wadflix)