Middleware Modernization Engineer — Java/C++ on Linux

Gromelski & Associates, Inc.; Manassas (VA); On-site; USD 130,000 - 190,000; Full time

Benefits offered by this job

Competitive benefits package

Job summary

Gromelski & Associates, Inc. is seeking a mid-level Software Developer to lead the migration of a legacy middleware platform to a modern open-source solution.

The role combines Java/C/C++ development with Linux system work in a DoD-sensitive setting and requires hands-on prototyping and performance measurements. The candidate will analyze current stacks, research modern options like gRPC and NATS, prototype on target hardware, and deliver a data-driven recommendation with a clear migration plan.

Qualifications

• Bachelor’s degree in CS/Software/CE/EE or equivalent experience.
• Ability to obtain DoD Secret Clearance (US citizenship required).
• 3+ years of professional experience in Java and C/C++ development.
• Strong Linux/Unix system administration and shell scripting.

Responsibilities

• Analyze the existing middleware stack, document performance bottlenecks, latency, throughput, and scalability requirements.
• Research and shortlist modern alternatives (gRPC, NATS, DDS, etc.), evaluating fit against functional and non-functional criteria.
• Prototype selected solutions on target hardware, measuring latency, CPU/memory usage, and integration effort.
• Produce a comprehensive recommendation report, including migration path, risk assessment, and implementation plan.
• Develop and integrate Java and C/C++ components in a Linux-based laboratory environment, following DoD processes (installation, recovery, checkout, testing).
• Collaborate closely with software team leads, systems engineers, and test personnel; communicate findings clearly and promptly.
• Document all work artifacts (designs, test results, build scripts, deployment guides) in accordance with configuration-management standards.
• Support off-shift and overtime activities when required to meet critical milestones.

Skills

Java

C/C++

Linux/Unix

Socket programming

Education

Bachelor’s degree in CS/Software/CE/EE

DoD Secret Clearance (US citizenship)

Tools

gRPC

Google Protocol Buffers

NATS

DDS

Gradle

CMake

Docker

OCI

Job description

Gromelski & Associates, Inc. is seeking a mid-level Software Developer to lead the migration of a legacy middleware platform to a modern open-source solution.

The role combines Java/C/C++ development with Linux system work in a DoD-sensitive setting and requires hands-on prototyping and performance measurements. The candidate will analyze current stacks, research modern options like gRPC and NATS, prototype on target hardware, and deliver a data-driven recommendation with a clear migration plan.