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Added 55 mins ago
Lead Security Engineer
The Walt Disney Company
Bay Lake, FL
The Lead Security Engineer will report to the Manager, Site Reliability Engineering
Added 56 mins ago
Equipment Engineer Manager
Actalent
Sanford, FL
…leadership and engineering execution role, not a SR. design engineer or technical lead…
Added 56 mins ago
Equipment Engineer Manager
Actalent
Sanford, FL
…leadership and engineering execution role, not a expert design engineer or technical lead…
Added 57 mins ago
Engineer or Principal Engineer level RF Electronics Engineer
Northrop Grumman
Melbourne, FL
Northrop Grumman’s Aeronautics Systems sector has an opening for a Engineer or Principal Engineer level RF Electronics Engineer to join our team of qualified, diverse individuals within our…
Added 57 mins ago
Staff Engineer Electronics - RF Antenna Cosite (Melbourne FL)
Northrop Grumman
Melbourne, FL
Northrop Grumman Aeronautics Systems has an opening for a Staff Engineer Electronics - RF Antenna Cosite to join the team of qualified individuals in our Avionics and Subsystems…
Added 57 mins ago
Senior Cybersecurity Engineer (Center of Excellence)
GE Vernova
Melbourne, FL
We are looking for a senior OT cybersecurity engineer to join the Grid Automation Cybersecurity Center of Excellence (COE). The COE is a new central team within the Grid Automation OT…
Added 57 mins ago
Site Reliability Engineer
Highmark Health
Tallahassee, FL
…patching, and best practices for device hardening. Assists with network segmentation, access control, and other configuration and monitoring activities whichisolate and to protect clinical…
Added 1 hour ago
TI
Member of Technical Staff - Senior Software Engineer (San Francisco, CA)
Tutor Intelligence
Watertown, MA
- $200,000 to $350,000 USD / year
…world. Tutor robots are manufactured at scale and operate as a network, combining the whole fleet’s learned experience to train ever more capable robot artificial…
Added 1 hour ago
VN
Process Optimization Manager (Water Treatment)
Veolia North America
Boonton, NJ
- $90,000 to $100,000 USD / year
Team Collaboration : Network and build relationships with other Municipal Services Teams (e.g. Project Leaders, Technical Leaders, Water Quality and Compliance Directors) to identify gaps,…
Added 1 hour ago
L
On-Site Service Engineer, Raritan NJ - 3rd Shift
Labcorp
Raritan, NJ
- $36 to $43 USD / hour
…Through our unparalleled science, data, technology and laboratory network, we advance diagnostics, accelerate innovation and help address some of the world’s most important health…
Added 1 hour ago
AD
SMTS Hardware Development Engineer
AMD Design LLC
Secaucus, NJ
- $215,100 to $248,400 USD / year
Job Title: SMTS Hardware Development Engineer
Added 1 hour ago
Principal Network Operations Engineer / IT Operations Specialist (US)
TD Bank
Mount Laurel, NJ
As a Principal Network Operations Engineer , you will play a critical role within the Technology Response (L2) team, responsible for rapid incident resolution and root cause analysis across…
Added 1 hour ago
Senior Instrumentation and Controls Design Engineer
Trustees of Princeton University
Princeton, NJ
Added 1 hour ago
M
Senior Network & Cloud Automation Architect
ManpowerGroup
Jersey City, NJ
- $65 to $68 USD / hour
As a Senior Network & Cloud Automation Architect, you’ll help shape resilient, modular solutions that support critical CTI strategic workstreams. Our client is seeking a senior…
Added 1 hour ago
M
Network / System Engineer II
ManpowerGroup
Jersey City, NJ
- $55 to $60 USD / hour
Our client, is seeking a Network / System Engineer II to join their team. As a Network / System Engineer II, you will be part of the [Department Name] supporting [Team Name(s)]. The ideal…
Added 1 hour ago
Site Reliability Engineer
Highmark Health
Trenton, NJ
…patching, and best practices for device hardening. Assists with network segmentation, access control, and other configuration and monitoring activities whichisolate and to protect clinical…
Added 1 hour ago
Electrical Engineer
Architect of the Capitol
Washington, DC
Summary This position is located in the Architect of the Capitol (AOC), Office of the Chief Engineer (OCE). The selected individual will serve as an Electrical Engineer providing experience…
Added 1 hour ago
Endpoint & Device Systems Engineer (REMOTE)
Koniag Government Services
Washington, DC
Kadiak LLC, a Koniag Government Services company, is seeking an experienced Endpoint & Device Systems Engineer to support Kadiak and the Indian Health Service (IHS) Electronic Health Record…
Added 1 hour ago
Senior RF Engineer
Anduril Industries
Broomfield, CO · Fort Collins, CO
…allies. The Radar team is seeking an experienced Senior RF Engineer to help us design, test, and deploy the next generation of US radars. The Radar team is responsible for all aspects of…
Added 1 hour ago
Senior Electrical Engineer
Anduril Industries
Broomfield, CO · Fort Collins, CO
…The Radar team is seeking an experienced Senior Electrical Engineer to transform ambitious concepts into manufacturable reality for the next generation of US radars. The Radar team is…
Added 1 hour ago
RF Engineer
Anduril Industries
Broomfield, CO · Fort Collins, CO
…and its allies. The Radar team is seeking an experienced RF Engineer to help us design, test, and deploy the next generation of US radars. The Radar team is responsible for all aspects of…
Added 1 hour ago
Site Reliability Engineer
Highmark Health
Washington, DC
…patching, and best practices for device hardening. Assists with network segmentation, access control, and other configuration and monitoring activities whichisolate and to protect clinical…
Added 1 hour ago
Senior Network Operations Engineer – Tier 3
CACI International
Washington, DC
Job Title: Senior Network Operations Engineer – Tier 3
Added 1 hour ago
Cloud Platform Engineer IL6/cArmy
Koniag Government Services
Washington, DC
…within the Government-furnished cArmy/SIPR IL-6 boundary. The engineer coordinates Appian, enterprise services, identity, logging, storage, network, capacity, recovery, and inherited…
Added 1 hour ago
API Integration Engineer
Koniag Government Services
Washington, DC
Tuknik Government Services, LLC, a Koniag Government Services company , is seeking an API Integration Engineer with a Secret security clearance to support TGS in supporting our government…

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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