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Mainframe Jobs in Washington, DC

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Senior Safety Methods Engineer System One

Bellevue, WA

$37–$74 / hour
Quick Apply

The engineer also builds automated, repeatable workflows, documents methodologies and assumptions, collaborates across disciplines to align methods with design and safety analysis, and follows SQA/NQA-1 practices to ensure traceability, configuration control, and reproducibility. Responsibilities include running steady-state and transient analyses to assess model performance and fidelity needs, integrating closure models and empirical correlations into existing frameworks, and identifying gaps through sensitivity studies to drive method improvements.

14 days ago

Senior Quality Assurance Engineer System One

Redmond, WA

$60–$70.81 / hour
Quick Apply

Perform critical assessments and qualifications of internal and supplier-proposed change management activities, including Production Part Approval Process (PPAP) activities for supplier changes. Own identified internal and supplier-driven Non-Conformances (NC) and Corrective Action Preventative Action records (CAPA), managing the timely processing and closure of NC and CAPA records within the electronic management system, Trackwise.

7 days ago

Test Project Engineer System One

Bellevue, WA

Remote

$49–$81 / hour
Quick Apply

The position will translate technical work and test-system requirements into an integrated test program plan and schedule, while establishing effective approaches for requirements tracking, configuration management, readiness tracking, change control, and test documentation. System One is seeking a Test Project Engineer to establish and maintain the planning, coordination, configuration, and execution-control framework for a complex, multi-campaign test program at the Sodium Test and Fill Facility.

2 days ago

Sodium Fire Design and Analysis Engineer System One

Bellevue, WA

Remote

$102–$130 / hour
Quick Apply

Other engineering activities include, but are not limited to, contributing to the development of computational methodologies and models, contributing to software commercial grade dedication, participating in hazard analysis, participating in Phenomena Identification and Ranking Table (PIRT) exercises, participating in Structures, Systems and Components (SSC) classification, developing analytical methods, performing analysis of sodium fire as well as verification and validation activities. The successful candidate will be responsible for developing sodium fire modeling methodologies, performing commercial grade dedication of sodium fire modeling codes, and performing sodium fire modeling calculations to support our client’s design and licensing.

14 days ago

Nuclear Safety Analysis Engineer System One

Bellevue, WA

Remote

$46–$77 / hour
Quick Apply

Familiarity with nuclear design, regulatory requirements, and risk-informed performance-based technology guidance for Non-Light Water Reactors, including EMDAP and Regulatory Guide 1.203, is preferred. Assess plant transient benchmark tests, identify applicable tests relevant to the advanced reactor, and perform benchmark calculations.

14 days ago

Senior Nuclear Engineer, Plant Thermal Hydraulics Validation System One

Bellevue, WA

Remote

$56–$95 / hour
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Define validation needs, develop test requirements, and collaborate closely with test engineering teams to ensure alignment between model gaps and experimental programs. Apply and improve SQA and NQA1 modeling quality practices and ensure traceability and configuration control of analysis inputs, models, and results.

14 days ago

Senior Engineer, Plant Thermal Hydraulics Methods System One

Bellevue, WA

Remote

$52–$85 / hour
Quick Apply

Other engineering activities include, but are not limited to, system transient codes development and maintenance, performing reactor transient analyses, code benchmark with Integral Effect Tests (IETs) or Separate Effect Tests (SETs), scaling analysis, software commercial-grade dedication, contributing to code assessment and adequacy evaluation, as well as performing verification and validation activities. Requirements Degree in Mechanical, Nuclear, Chemical Engineering, or similar fields, with 5+ years of experience in system-level thermal hydraulic modeling and method development for nuclear or complex energy systems.

13 days ago

Principal Engineer, Seismic CSA Integration and Oversight System One

Bellevue, WA

Remote

$69–$115 / hour
Quick Apply

Perform technical reviews of work products, including seismic analysis, soil-structure interaction (SSI) analysis, and probabilistic assessments. Support the development of plant level requirements and strategies related to seismic design and licensing activities for advanced nuclear reactor projects.

14 days ago

Systems Resilience Engineer - Hybrid Cloud Storage Qumulo

Seattle, WA

$140,000–$210,000 / year

Built for the most demanding enterprise workloads, from AI and HPC simulations to Splunk Observability, genomics and PACS medical imaging, geospatial datasets, media editing and rendering, and video surveillance, Qumulo unlocks the full power of an organization’s information. Our platform unifies file and object storage across data centers, edge, and public clouds, enabling efficient, accelerated computing and extending the reach of data unbound by protocol or transport limitations.

3 days ago

Principal Software Engineer Microsoft

Redmond, WA

$142,800–$274,800 / year

Masters Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $188,000 - $304,200 per year.

16 days ago

SoC Performance Verification Engineer - Senior Microsoft

Redmond, WA

$119,800–$234,700 / year

Doctorate in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 1+ year(s) technical engineering experience OR Masters Degree in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 4+ years technical engineering experience. To achieve this goal, the Compute Silicon and Manufacturing Engineering (CSME) team is instrumental in defining and delivering operational measures of success for hardware manufacturing, improving the planning process, quality, delivery, scale and sustainability related to Microsoft cloud hardware.

16 days ago

Senior Software Engineer Microsoft

Redmond, WA

$119,800–$234,700 / year

Masters Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $160,200 - $261,000 per year.

16 days ago

Sr. Software Engineer -CTJ- Poly Microsoft

Redmond, WA

$119,800–$234,700 / year

Masters Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. You will work on distributed systems that enable Power Platform services to function in isolated, air‑gapped environments, partnering with Public Cloud teams to bring features to parity while ensuring those features meet the constraints of sovereign deployments.

16 days ago

Principal Silicon Engineer - System Modeling Microsoft

Redmond, WA

$142,800–$274,800 / year

There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $188,000 - $304,200 per year. To achieve this goal, the Interface IP Team team is instrumental in defining and delivering operational measures of success for hardware manufacturing, improving the planning process, quality, delivery, scale and sustainability related to Microsoft cloud hardware.

16 days ago

Software Engineer II - CTJ - Poly Microsoft

Redmond, WA

$102,100–$202,200 / year

Masters Degree in Computer Science or related technical field AND 3+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 5+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. This opportunity will allow you to accelerate your cloud engineering expertise, develop deep knowledge of distributed systems and large-scale service operations, build advanced skills in automation, observability, incident management, and AI-powered operational tooling, as well as develop code-based engineering solutions across many services.

16 days ago

Senior Design Verification Engineer Microsoft

Redmond, WA

$119,800–$234,700 / year

Doctorate in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 1+ year(s) technical engineering experience OR Masters Degree in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 4+ years technical engineering experience OR Bachelors Degree in Electrical Engineering, Computer Engineering, Computer Science, or related field AND 5+ years technical engineering experience OR equivalent experience. The AI Silicon Engineering (AISiE) SoC Design Verification team is seeking a Senior Design Verification Engineer who can work with cross-discipline teams (including systems, firmware, architecture, design, validation, and product engineering) to develop environment and test cases to verify Microsoft’s latest AI accelerators.

16 days ago

Principal Subsystem Design Engineer Microsoft

Redmond, WA

$142,800–$274,800 / year

To achieve this goal, the Artificial Intelligence System on Chip (AISoC) team is instrumental in defining and delivering operational measures of success for hardware manufacturing, improving the planning process, quality, delivery, scale and sustainability related to Microsoft cloud hardware. Drive design implementation, including microarchitecture specification, RTL development and integration using Verilog/SystemVerilog, synthesis, timing constraints, floor-planning considerations, performance optimization, and design-quality closure including CDC, lint, and RDC.

16 days ago

Site Reliability Engineer - CTJ - POLY Microsoft

Redmond, WA

$119,800–$234,700 / year

Masters Degree in Computer Science, Information Technology, or related field AND 2+ years technical experience in software engineering, network engineering, or systems administration OR Bachelors Degree in Computer Science, Information Technology, or related field AND 4+ years technical experience in software engineering, network engineering, or systems administration OR equivalent experience. Our team works across all facets of isolated system engineering and is deeply involved in defining and improving service health through SLIs/SLOs and error budgets, building automation to reduce toil, strengthening observability (logs, metrics, traces), reducing systemic latency, validating and transforming data, and optimizing throughput and capacity.

16 days ago

Principal Software Engineer - AI Safety and Security Microsoft

Redmond, WA

$142,800–$274,800 / year

You will lead through code and ideas: defining detailed architectures, building large-scale data and detection systems, working through security and privacy reviews, and partnering with cross-company leaders, product engineers, applied scientists, threat hunters, and incident responders from early exploration through production operation. Bachelors Degree in Computer Science or related technical field AND 6+ years technical engineering experience, including significant ownership of distributed data, platform, or security products with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.

16 days ago

Senior Software Engineer, Security AI Microsoft

Redmond, WA

$119,800–$234,700 / year

In this hands-on engineering role, you will design, build, and operate production AI services that combine large language models, retrieval-augmented generation, agent-based workflows, knowledge systems, and security data to solve real-world security challenges. You will collaborate with engineering, applied science, threat intelligence, security operations, product, and partner teams across Cloud + AI to deliver systems that are secure by design, operationally excellent, durable and grounded in measurable platform impact.

16 days ago

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Mainframe Jobs in Washington, DC

Senior Safety Methods Engineer System One

Senior Quality Assurance Engineer System One

Test Project Engineer System One

Sodium Fire Design and Analysis Engineer System One

Nuclear Safety Analysis Engineer System One

Senior Nuclear Engineer, Plant Thermal Hydraulics Validation System One

Senior Engineer, Plant Thermal Hydraulics Methods System One

Principal Engineer, Seismic CSA Integration and Oversight System One

Systems Resilience Engineer - Hybrid Cloud Storage Qumulo

Principal Software Engineer Microsoft

SoC Performance Verification Engineer - Senior Microsoft

Senior Software Engineer Microsoft

Sr. Software Engineer -CTJ- Poly Microsoft

Principal Silicon Engineer - System Modeling Microsoft

Software Engineer II - CTJ - Poly Microsoft

Senior Design Verification Engineer Microsoft

Principal Subsystem Design Engineer Microsoft

Site Reliability Engineer - CTJ - POLY Microsoft

Principal Software Engineer - AI Safety and Security Microsoft

Senior Software Engineer, Security AI Microsoft

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