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Added 10 mins ago
Principal Network Development Engineer
Oracle
Nashville, TN
As a Principal Network Development Engineer, you will help lead the migration of Federal customers to Oracle Cloud Infrastructure (OCI). This role requires deep network architecture…
Added 16 mins ago
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Antenna Control Systems Engineer
Actalent
Plano, TX
- $70,000 to $80,000 USD / year
Job Title: Entry Level Electrical Engineer Job DescriptionThe Antenna Control Systems Engineer supports the design, development, testing, and integration of control systems for advanced…
Added 17 mins ago
Mine Manager
Lhoist North America of Tennesse, LLC
TN
…reserve; is the safety Champion of the mining team; tracks & drives productivity resulting in the most efficient cost/ton mined. Works closely with the Maintenance Manager related to…
Added 32 mins ago
Process Engineer II - Midstream Facilities
Williams WPC-I, LLC.
United States
Required: Bachelor’s Degree in relevant Engineering field from an ABET accredited college or university, OR Bachelor's Degree in Engineering Technology in a relevant field with Professional…
Added 32 mins ago
Senior DevSecOps / CI/CD Engineer
Peraton
Chantilly, VA
Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading…
Added 32 mins ago
DevSecOps / CI/CD Engineer
Peraton
Chantilly, VA
Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading…
Added 33 mins ago
Analytics Engineer, Business Intelligence
Accelecom
Atlanta, GA
…and the broader Southeast. Fact-based continuous improvement drives our decision-making, and we are seeking the right individual to own our business intelligence platform. This is an ideal…
Added 33 mins ago
Sr. Engineer, Controls and Automation
MCA - Alpolic
Chesapeake, VA
The Sr. Engineer, Controls and Automation provides senior-level plant engineering leadership for electrical power, controls, automation, operational technology (OT), SCADA, and…
Added 35 mins ago
Tier 3 Platform Engineer SME
Peraton
Chantilly, VA
Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading…
Added 35 mins ago
Senior Tier 3 Platform Engineer
Peraton
Chantilly, VA
Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading…
Added 37 mins ago
Tier 3 Platform Engineer
Peraton
Chantilly, VA
Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading…
Added 40 mins ago
Staff Associate | Construction Materials Testing (CMT)
BUNNELL LAMMONS ENGINEERING
Fletcher, NC
…clients and partners informed, while a commitment to excellence drives us to produce work that consistently sets the standard in our industry. Most importantly, we honor every commitment we…
Added 51 mins ago
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Electrical Engineer
Actalent
Hopewell, VA
- $95,000 to $142,600 USD / year
Job Title: Electrical Reliability EngineerJob DescriptionThe Electrical Reliability Engineer supports the Maintenance and Reliability organization at a chemical manufacturing plant by…
Added 52 mins ago
Infrastructure Engineer II
Dartmouth College
NH
The Infrastructure Engineer II is a hands-on engineer who builds, secures, and operates these platforms across on-premises and public cloud environments. Security is central to the role:…
Added 1 hour ago
Marine - Lead Field Service Engineer -
Bold New Solutions - BNS Power
-, SC
The Lead Field Service Engineer – Power Systems, under general guidance and minimal supervision, performs a wide range of engineering tasks and ensures proper installation, service, and…
Added 1 hour ago
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Field Service Technician - Remote
AMF Bakery Systems
Richmond, VA
- $38 to $48 USD / hour
· Three (3) years of field service experience in the food/bakery or packaging industry
Added 1 hour ago
AB
Field Service Technician - Remote
AMF Bakery Systems
Richmond, VA
- $38 to $48 USD / hour
· Three (3) years of field service experience in the food/bakery or packaging industry
Added 1 hour ago
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Stationary Operations Engineer 3rd Shift- Alexandria, VA
M.C. Dean, Inc
Alexandria, VA
- $43.57 to $54.47 USD / hour
Our people are passionate about engineering innovation that improves lives and drives impactful change. Guided by our core values - agility, expertise, and trust - we foster a collaborative…
Added 2 hours ago
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Controls Engineer (Expert)
Actalent
Shelbyville, IN
- $48.08 to $57.69 USD / hour
Job Title: Controls EngineerJob DescriptionThis Controls Engineer role focuses on designing, programming, and commissioning automated control systems within a high-volume automotive glass…
Added 2 hours ago
Field Service Engineer- Canada
Ametek, Inc.
Virtual, CA
The Field Service Engineer is responsible for the start-up, testing, preventative maintenance, troubleshooting, and repair of critical power equipment at customer sites. This position…
Added 2 hours ago
Industrial Engineer
Sunset
Jonestown, PA
Our facility in Jonestown, PA is currently seeking an Industrial Engineer – DC Performance & Reliability. This role drives distribution center performance across an assigned portfolio of…
Added 2 hours ago
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Field Service Engineer
Actalent
Rockford, MI
- $35 to $47 USD / hour
Job Title: Field Service EngineerJob DescriptionThe Field Service Engineer supports the installation, startup, and commissioning of automated systems at customer facilities. This role…
Added 3 hours ago
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Electrical Engineer
Actalent
Grand Forks, ND
- $43 to $82 USD / hour
Job Title: Electrical EngineerJob DescriptionThe Electrical Engineer designs, develops, integrates, tests, and troubleshoots advanced electrical systems that support aerospace test and…
Added 3 hours ago
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Alfa Laval Inc
BUFFALO, NY
…fuels our 140-year-old start-up culture and rapid growth also drives our personal growth. So, as we shape a more resourceful, less wasteful world, we build our careers too. About the job We…
Added 4 hours ago
FTS Network Services - Network Product Engineer
Fiserv
Greenwood Village, CO
You will engineer, implement, automate, validate, and optimize complex enterprise network infrastructure and network services. You will work across data center, campus, WAN, security,…

Microsoft

Principal Software Engineer

WA, United States
Redmond, WA, United States
Redmond, 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: Apr 28, 2027
Posting language: English
Posted: Oct 30, 2026

Original job description

Overview

We are looking for a Principal Software Engineer who lives and breathes Azure Cosmos DB and knows how it is implemented underneath. Your mission is to make throttling disappear from Microsoft's AI plugin registry with fast, surgical, high-ROI changes. Success is objective: throttling goes away, reliability goes up, and latency goes down, even as scale grows. You will see the results in days, not quarters. We are the Agent Tools and Lifecycle team in Microsoft's Copilot, Agents and Platform (CAP) organization. We build the service behind the AI plugin registry. Admins use it in the Microsoft 365 admin center to govern the plugins (skills, connectors, and agents) that extend Microsoft Copilot, and users discover and use those plugins across products such as Copilot Chat, Cowork, Teams, Word, Excel, and PowerPoint. The registry is a core part of Microsoft's AI architecture, alongside Work IQ, and Copilot experiences across Microsoft depend on it. If you use an AI solution from Microsoft, you likely are working with our service. Come join us at the center of AI transformation at Microsoft! As a hands-on individual contributor, you will be the technical leader for the AI plugin registry's Azure Cosmos DB tier. Our catalog of plugins and agents, and the entitlements and policies that decide who can use them, live in Cosmos DB in data centers worldwide, including sovereign clouds. Traffic keeps growing as the registry expands to experiences such as Copilot Studio, GitHub Copilot, and Microsoft Foundry. Experience working on the internals of Cosmos DB or a comparable database, such as MongoDB, Amazon DynamoDB, or Apache Cassandra, and an understanding of the hardware and network limits that make them throttle, are especially valuable. Our global reach means 24/7 on-call service. This position is based in Redmond, Washington and requires the employee be in the office a minimum of 3 days per week. 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

Cut request unit (RU) consumption to make throttling go away, fast. Start with the queries that use the most RUs, where we see room for 50–90% reductions: turn cross-partition and fan-out queries into point reads from Cosmos DB or Azure Blob Storage, batched reads, or single-partition queries, and tune indexes.
Pick work by return on investment. Ship several targeted fixes in parallel, each within days, and measure each one in production. Take on a larger redesign only when the data shows smaller fixes cannot get there, and deliver it in steps that each pay off.
Fix hot partitions and size limits at the source: partition keys, document design, indexing policies, and API contracts that give high-traffic calls the keys they need for point reads. When data has to move, migrate it with zero downtime across all environments, including sovereign clouds.
Decide what belongs in Cosmos DB. Move large, binary, unbounded, or rarely queried content to Azure Blob Storage or other storage, weighing latency, availability, and data-residency needs.
Remove redundant and sequential database calls on our busiest paths with batching, request coalescing, and caching, and use retry budgets, load shedding, and graceful degradation so database pressure does not turn into failed requests.
Work with product management and the teams that call us to give each caller a throttling budget. Find callers that request the same unchanged data again and again, help them cache on their side, and lower the budgets of the heaviest callers over time.
Make success measurable: own the telemetry, dashboards, and alerts, RU use per API and per caller, partition skew, availability, and latency. Set targets, show the effect of every change, and spot limits before we hit them.
Raise the bar through AI: write AI skills that review designs and code for Cosmos DB mistakes, find high-RU queries, and show engineers how to fix them, so your expertise scales across the team. Use agentic tools to build and validate fixes faster, following Responsible AI practices. Mentor engineers and represent us with the Azure Cosmos DB product group.
Serve as a Designated Responsible Individual (DRI) in our 24/7 on-call rotation, lead data-tier incident response, and turn what we learn into lasting fixes.

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.
4+ years of experience building or operating large-scale distributed databases, such as Azure Cosmos DB, MongoDB, Amazon DynamoDB, or Apache Cassandra, including partitioning, indexing, and query performance.
Experience finding and fixing throttling, hot partitions, or resource-heavy cross-partition queries in production databases.
Experience building or improving the internals of Azure Cosmos DB, or of a comparable distributed database such as MongoDB, Amazon DynamoDB, or Apache Cassandra, in areas such as partitioning, replication, storage engines, query execution, indexing, or rate limiting.
Deep, hands-on Azure Cosmos DB expertise: what drives the RUs each operation uses, physical partitions and splits, hierarchical partition keys, indexing policies, point reads and ReadMany versus cross-partition queries, change feed, consistency levels, multi-region accounts, autoscale, SDK (software development kit) retries, and diagnosing errors.
Track record of making throttling go away quickly, raising availability, and cutting tail latency in production, with targeted, high-ROI changes and before-and-after measurements to prove it.
Deep understanding of why distributed databases throttle, from per-partition throughput and storage limits to hardware, network, and replication overhead, and how to design data models that stay within those limits.
Experience moving large or rarely queried content from a document database to Azure Blob Storage or comparable object storage, and serving it with point reads.
Experience with zero-downtime data migrations and re-partitioning on live production systems.
Experience designing rate limits, quotas, and noisy-neighbor isolation for a multi-tenant platform, and getting partner teams to cache on their side.
Proficiency in C# and .NET, and experience with Azure services such as Azure Functions, Service Bus, Azure Cache for Redis, and API (application programming interface) Management.
Understanding of modern AI technologies, including generative AI and foundation models, and experience writing AI skills and using agentic tools to engineer faster.

#CosmosDB, #MongoDB, #DynamoDB, #Cassandra,# AI,# Artificial Intelligence

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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