Senior Scientific Software Engineer (Fed Gov) 3850

pofft Technology Inc.; United States; On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Flexible Work Schedules

401(k) & ESOP

Professional Development and Training

Tuition Reimbursement

Employee Assistance Program

Medical/Dental/Vision Insurance Plans

Job summary

RESPEC is seeking a Senior Scientific Software Engineer to support computational modeling software for a large National Laboratory. You will modernize legacy code, improve performance on Linux and HPC systems, and ensure quality through testing and documentation.

The role requires strong Fortran, Python, and C/C++ skills, extensive Linux tooling, and experience with MPI, Slurm, and Doxygen. Join a 100% employee-owned environment on challenging mission-critical projects.

Qualifications

• Master’s degree with at least 5 years in computational modeling and software development.
• Bachelor’s degree with at least 10 years in relevant field and proven track record.
• At least one project in the last 5 years combining modeling and development in a safety-critical env.
• Ability to describe project environment, tasks, responsibilities, and deliverables.

Responsibilities

• Sustain, analyze, and modernize scientific software, including legacy systems.
• Refactor code for portability, efficiency, and maintainability.
• 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 schedulers like Slurm.
• Apply software quality practices, testing, and verification.
• Document source code, debt, risks, and workflows.
• Support reproducible builds and data workflows; ensure NQA-1 compliance.

Skills

Fortran

Python

C/C++

GNU/Linux

Slurm

Bash scripting

MPI

Debugging

Doxygen

Version control (Git)

Education

Master’s degree in CS/Engineering or related

Bachelor’s degree in related field

Tools

OpenMPI/MPICH/Intel MPI

Git

Job description

Senior Scientific Software Engineer (Fed Gov) 3850

Senior Scientific Software Engineer (Fed Gov) 3850 United States Full Time

RESPEC is seeking a Senior Scientific Software Engineer to support scientific computing work for a large National Laboratory. You’ll help sustain and modernize computational modeling software used in a high-consequence environment, with a focus on reliable, maintainable code and performance on Linux and HPC systems.

Core 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.

Required Technical Experience

• Master’s degree in computer science, engineering, or a related discipline, such as environmental science, mathematics, or physics, and at least 5 years of relevant experience in computational modeling, software development, and documentation; or
• Bachelor’s degree in a related discipline and at least 10 years of relevant experience.
• At least one project within the 5 years preceding the response deadline involving both computational modeling and software development in a regulated, safety-critical, high-consequence, or equivalent mission-critical environment.
• Ability to describe the project’s environment, tasks, responsibilities, and deliverables, and explain why the work was high-consequence or mission-critical.

Technical skills

• Scientific programming with Fortran, Python, and C and/or C++.
• GNU/Linux or equivalent development environments, including build, compilation, and debugging toolchains.
• HPC systems and job schedulers such as Slurm or equivalent.
• Bash or equivalent Unix/Linux shell scripting.
• Software quality practices, testing, and scientific data formats and workflows.
• Debugging, profiling, performance analysis, and legacy-code modernization.Git or equivalent version control and reproducible builds.
• Source-code documentation tools such as Doxygen or equivalent.
• Python 2 and Python 3
• C and C++
• OpenMPI, MPICH, or Intel MPI
• Serial and parallel scientific codes

Featured benefits:

• Flexible Work Schedules
• 401(k) & ESOP (with company match up to 4%)
• Professional Development and Training
• Tuition Reimbursement
• Employee Assistance Program
• Medical/Dental/Vision Insurance Plans

All your information will be kept confidential according to EEO guidelines.

Big challenges need bold thinkers.

If you’re someone who sees problems as opportunities, you’ll thrive here. RESPEC is 100% employee-owned, which means we take ownership of every challenge. Here, your ideas drive real solutions. Since 1969, we’ve tackled complex challenges in energy transition, infrastructure resilience, digital transformation, and sustainability.

At RESPEC , you’ll work alongside clients to take on critical problems

Skills

Payment Type

annual

Price Range

-

Work Type

Full Time

Location

United States