Senior Scientific Software Engineer — HPC, Modeling & Performance

RESPEC; United States; On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Flexible Work Schedules

Paid Parental Leave

401(k) & ESOP (with company match up 4

401(k) & ESOP (with company match up 4

Professional Development and Training

Tuition Reimbursement

Employee Assistance Program

Medical/Dental/Vision Insurance Plans

Job summary

RESPEC is seeking a senior software professional to sustain and modernize scientific software, including legacy systems, for high-consequence modeling environments. You will refactor code for portability and performance while supporting HPC workflows and Linux development.

The role requires a strong background in Fortran, Python, and C/C++, with experience in regulated environments and software quality practices. Join a team delivering impactful energy and infrastructure projects.

Qualifications

• Master's degree or higher with 5+ years in computational modeling, software development and documentation; or Bachelor's with 10+ years in related field.
• Experience in regulated, safety-critical or mission-critical environments is preferred.
• Ability to describe project context, tasks, responsibilities and deliverables, including why work was high-consequence.

Responsibilities

• Sustain, analyze, and modernize scientific software, including legacy systems.
• Refactor code to improve portability, efficiency, maintainability, and stability.
• Support computational modeling across conceptual, process, and numerical models.
• Debug, profile, benchmark, and assess software performance and scalability.
• Support Linux development, HPC workflows, and job-scheduler use.
• Apply software quality practices, testing, and verification and validation.
• Document source code, technical debt, risks, and software workflows.
• Support reproducible builds, scientific data workflows, and migration readiness.
• Perform work in accordance with applicable Nuclear Quality Assurance (NQA-1) requirements.

Skills

Fortran

Python

C/C++

Education

MS in CS/Engineering

BS in related field

Tools

Linux

Slurm

Git

MPI

Doxygen

Job description

RESPEC is seeking a senior software professional to sustain and modernize scientific software, including legacy systems, for high-consequence modeling environments. You will refactor code for portability and performance while supporting HPC workflows and Linux development.

The role requires a strong background in Fortran, Python, and C/C++, with experience in regulated environments and software quality practices. Join a team delivering impactful energy and infrastructure projects.