Senior Scientific Software Engineer, HPC for Regulated Labs

Jobgether; United States; On-site; USD 140,000 - 200,000; Full time

Benefits offered by this job

Flexible schedules

Parental leave

401(k) matching

ESOP

Professional development

Tuition reimbursement

EAP

Health/dental/vision insurance

Impactful scientific projects

Collaborative culture

Job summary

Jobgether, on behalf of a partner company, seeks a Senior Scientific Software Engineer (Fed Gov) in the United States to modernize and maintain critical scientific software for national laboratory scale modeling. You’ll work with Fortran, Python, C/C++ on Linux HPC environments, ensuring quality, reproducibility, and mission readiness in a regulated setting.

You’ll collaborate across teams on MPI workflows, build and debug in GNU/Linux toolchains, and document risks, dependencies, and workflows

Qualifications

• Master's degree or Bachelor's with extensive experience in computational modeling and software development.
• Experience on projects in regulated, safety-critical environments within the last 5 years.
• Strong C/Fortran/Python/C++ programming skills and legacy modernization ability.
• Proficiency in Python 2 and 3 for legacy and new codebases.
• Experience on GNU/Linux, build systems, debugging toolchains, and workflows.
• Hands-on HPC experience with Slurm or similar schedulers.
• Proficiency in Bash scripting.
• Knowledge of software quality, testing, and scientific data workflows.
• Strong debugging, profiling, benchmarking, and performance analysis skills.
• Ability to modernize legacy software while preserving correctness.
• Experience with Git and reproducible builds; familiarity with Doxygen.
• Experience with OpenMPI/MPICH/Intel MPI and parallel computing frameworks.
• Knowledge of serial and parallel scientific computing and modeling techniques.
• Strong analytical, detail-oriented, and collaborative communication skills.
• Ability to work in highly regulated environments.

Responsibilities

• Sustain, analyze, maintain, and modernize scientific software including legacy systems.
• Refactor codebases for portability, performance, and maintainability.
• Support computational modeling activities with conceptual, process-based, and numerical models.
• Debug, profile, benchmark, and evaluate performance bottlenecks and scalability.
• Support Linux-based HPC workflows and job scheduler operations.
• Develop and maintain software using Fortran, Python, C, and C++.
• Apply software engineering best practices including testing and QA.
• Document code, technical debt, risks, dependencies, and workflows.
• Support reproducible builds and data processing workflows; ensure migration readiness.
• Work with MPI environments (OpenMPI/MPICH/Intel MPI) and parallel apps.
• Maintain serial and parallel code execution and reliability.
• Support compilation, debugging, and build processes with GNU/Linux toolchains.
• Adhere to Nuclear Quality Assurance (NQA-1) requirements in development.
• Collaborate across scientific, engineering, and software teams for accuracy and mission readiness.

Skills

Fortran

Python

C/C++

Bash

Linux

MPI

OpenMPI

MPICH

Slurm

Git

Doxygen

Build systems

Debugging

Profiling

Reproducible builds

Quality practices

GCC

Python 2/3

OpenMPI/MPICH/Intel MPI

Education

Master's degree in Computer Science or Engineering

Bachelor's degree in related discipline

Tools

OpenMPI

MPICH

Intel MPI

Slurm

Git

Doxygen

GCC

Python 2/3

GNU/Linux

Job description

Jobgether, on behalf of a partner company, seeks a Senior Scientific Software Engineer (Fed Gov) in the United States to modernize and maintain critical scientific software for national laboratory scale modeling. You’ll work with Fortran, Python, C/C++ on Linux HPC environments, ensuring quality, reproducibility, and mission readiness in a regulated setting.

You’ll collaborate across teams on MPI workflows, build and debug in GNU/Linux toolchains, and document risks, dependencies, and workflows