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Junior Full Stack Engineer
Co-Intelligence Labs
Austin, TX
As a Junior Fullstack Engineer, you'll contribute to our next-generation healthcare recommendation platform while learning from experienced engineers. You'll work across the technology…
Added just now
Senior/Staff/Principal Software Engineer
Ease Health
New York City, NY
Senior/Staff/Principal Software Engineer - Ease Health
Added 1 min ago
HA
Full Stack Software Engineer
HeyMilo AI
New York City, NY
- $120,000 to $200,000 USD / year
We're looking for a Senior Full-Stack Engineer who thrives in a fast-paced, highly dynamic environment. This role is all about quickly building and iterating on features, and working…
Added 2 mins ago
Senior Software Engineer
Marble Technologies
Lincoln, NE · Omaha, NE
Marble is a technology company founded to revolutionize the food processing industry. Marble is seeking a full-time Senior Software Engineer who is ready for a challenge and eager to…
Added 2 mins ago
MB
Sr. ML Engineer
Memory Bridge
Remote, United States
- IRR 800,000,000 to IRR 1,200,000,000 IRR / year
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Added 2 mins ago
Sr. Applied ML Engineer
Memory Bridge
Remote, United States
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Junior Software Engineer (QA & Automation)
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- $28 to $38 USD / hour
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Senior Software Engineer
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Senior Generative AI Engineer / Architect
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Plano, TX
・Job Title: Senior Generative AI Engineer / Architect
Added 9 mins ago
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Senior Software Engineering Manager
Microsoft
WA · Redmond, WA · Redmond
- $119,800 to $261,000 USD / year
…strategic examples of AI innovation, and delivering a framework for integration of our modules into Microsoft’s AI Platform. As a Senior Software Engineering Manager on our team, you will…
Added 9 mins ago
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Senior Mechanical Engineer
Microsoft
NC · Charlotte, NC · Charlotte
- $119,800 to $261,000 USD / year
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Added 11 mins ago
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Principal Software Engineer
Microsoft
WA · CA · Redmond, WA · Mountain View, CA · Redmond · Mountain View
- $142,800 to $304,200 USD / year
We are seeking a Principal Security Software Engineer to define and build the security foundation for COSMIC’s high-scale infrastructure and autonomous operations.
Added 12 mins ago
IC
AMHS Intelligent Systems Engineer
Intel Corporation
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- $128,880 to $211,200 USD / year
We are seeking an experienced Manufacturing Systems Software Development Engineer to take ownership of real-time cleanroom automation architectures, high-availability control software, and…
Added 13 mins ago
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Quality Assurance Engineer - PHP
Eliassen Group
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- $40 to $50 USD / hour
Our client seeks a results-driven Senior Quality Assurance Engineer to support Policyholder Portal applications. The role requires manual, automation, mobile, API, and database testing…
Added 19 mins ago
Integration Services Senior Engineer
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Quality Assurance Engineer - PHP
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- $40 to $50 USD / hour
Our client seeks a results-driven Senior Quality Assurance Engineer to support Policyholder Portal applications. The role requires manual, automation, mobile, API, and database testing…
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Austin, TX
- $6,400 to $7,900 USD / month
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Added 32 mins ago
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Information Assurance Engineer/Senior ISSO
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Sr. Network Systems Engineer
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Senior Engineer (Part-Time)
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Fort Meade, MD
- Part-time
The Senior Engineer will be responsible for evaluating, testing, and documenting of NGMFA solutions.

Microsoft

Principal Software Engineer

WA, United States
CA, United States
Redmond, WA, United States
Mountain View, CA, United States
Redmond, United States
Mountain View, United States

$142,800 to $304,200 USD / year

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Job details

Pay: $142,800 to $304,200 USD / year
Apply by: May 2, 2027
Posting language: English
Posted: Nov 3, 2026

Original job description

Overview

Cloud operations are entering a new era. COSMIC is building agentic infrastructure that helps engineers define goals, policies, and operational intent while autonomous systems safely execute routine work across Microsoft’s largest Kubernetes fleets.

Part of M365 Substrate Core, COSMIC is modernizing Microsoft’s compute platform with turn-key geo-presence, security, high availability, fault isolation, and automated cloud buildout - improving service agility, reliability, compliance, and cost efficiency. We are seeking a Principal Security Software Engineer to define and build the security foundation for COSMIC’s high-scale infrastructure and autonomous operations. You will lead the architecture and delivery of platform capabilities for public key infrastructure (PKI), certificate and key lifecycle management, workload identity, secrets protection, cryptographic agility, and secure service-to-service communication across globally distributed fleets. You will connect cloud control planes, Kubernetes controllers and custom resources, authorization systems, and workload consumption paths into secure end-to-end experiences. You will design systems that make the secure path the default, automate rotation and recovery, minimize standing privilege, and remain safe and observable during failures, partial rollouts, migrations, and incidents. Working across COSMIC, M365, and partner security organizations, you will turn ambiguous security and compliance requirements into durable platform architecture, establish engineering standards, drive multi-team execution, and raise the security capability of the broader organization through technical leadership and mentorship. Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.

Responsibilities

Own the security architecture, technical strategy, implementation, rollout, and operation of foundational COSMIC security services across globally distributed, high-scale infrastructure.
Design and build highly available certificate lifecycle systems, including enrollment, issuance, secure delivery, validation, renewal, revocation, expiry prevention, trust distribution, and root and intermediate CA rotation.
Build resilient key and secrets management capabilities, including KMS integration, encryption at rest, key-version transitions, automated reconciliation and validation, hardware-backed protection where appropriate, auditability, and emergency recovery.
Advance identity and authorization for multi-tenant Kubernetes and cloud-native infrastructure using workload identity, scoped managed identities, namespace and workload isolation, mutual TLS, least-privilege RBAC, policy enforcement, and secure secret delivery.
Own trust and issuer-change readiness across public and sovereign environments, including cryptographic agility, operating-system and container trust behavior, compatibility validation, migration guidance, and uninterrupted fleet availability.
Threat model complex distributed systems and investigate cross-tenant or cross-workload privilege boundaries; translate findings into secure-by-default APIs, platform guardrails, enforcement points, migration plans, and safely deployable remediation.
Establish security invariants, service-level objectives, inventories, expiry alerts, telemetry, detection, audit, and post-change validation that continuously demonstrate the health and integrity of certificate, key, identity, and secrets systems.
Lead production readiness and operations through ring-based deployment, feature gating, compatibility and failure testing, automated rollback, blast-radius containment, incident response, on-call excellence, troubleshooting guidance, and durable follow-up.
Drive end-to-end security features across control planes, resource provisioning, agents and controllers, Kubernetes custom resources, cloud authorization, and workload consumption paths, with meaningful integration and regression testing.
Lead cross-team architecture and execution across platform, identity, cloud infrastructure, security response, and partner engineering; clarify ownership boundaries, resolve long-range dependencies, contribute production code and design documents, and mentor engineers in security and distributed-systems practices.

Qualifications

Required Qualifications:

Bachelor's 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 equivalent experience.

Other Requirements:

Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include but are not limited to the following specialized security screenings:

Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.

Preferred Qualifications:

Master's 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 Bachelor's 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.
3+ years of experience designing, building, or operating security-critical software or infrastructure in areas such as PKI, certificates, cryptographic key management, secrets management, identity, authentication, or authorization.
Experience designing and operating distributed systems or cloud services with high availability, reliability, observability, and incident-response requirements.
Experience with X.509, certificate authorities, TLS/mTLS, cryptography, key management, HSMs, KMS, and workload identity systems.
Expertise in securing multi-tenant Kubernetes, distributed infrastructure, zero-trust architectures, workload isolation, and security policy enforcement.
Proven ability to lead cross-team security initiatives, including architecture, trust migrations, and production deployment while ensuring service availability.
Proficient in threat-modeling, security review, incident investigation, and operational risk management skills, leveraging telemetry, audits, and automated controls.
Ability to communicate complex security decisions clearly, influence senior stakeholders, build alignment across teams, and mentor engineers in security engineering practices.

Software Engineering IC5 - The typical base pay range for this role across the U.S. is USD $142,800 - $274,800 per 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.

Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here: https://careers.microsoft.com/us/en/us-corporate-pay

This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.

Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.

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More about this job

Skills

Kubernetes
Microsoft 365
Communication skills
Regulatory compliance
Leadership
Incident response
Troubleshooting
Computer science
C
C++
C#
Oracle Java
JavaScript
Python
Risk management

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