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Job Details
Posted date: Apr 01, 2026
There have been 2732 jobs posted with the title of Principal Software Engineer all time at Microsoft.There have been 2732 Principal Software Engineer jobs posted in the last month.
Category: Software Engineering
Location: Tokyo, Tokyo-to
Employment type: Full-Time
Work location type: 0 days / week in-office – remote
Role: Individual Contributor
Description
OverviewMicrosoft is a company where passionate innovators come to collaborate, envision what can be and take their careers further. This is a world of more possibilities, more innovation, more openness, and the sky is the limit thinking in a cloud-enabled world.
Microsoft’s Azure Data engineering team is leading the transformation of analytics in the world of data with products like databases, data integration, big data analytics, messaging & real-time analytics, and business intelligence. The products our portfolio include Microsoft Fabric, Azure SQL DB, Azure Cosmos DB, Azure PostgreSQL, Azure Data Factory, Azure Synapse Analytics, Azure Service Bus, Azure Event Grid, and Power BI. Our mission is to build the data platform for the age of AI, powering a new class of data-first applications and driving a data culture.
Within Azure Data, the databases team builds and maintains Microsoft's operational Database systems. We store and manage data in a structured way to enable multitude of applications across various industries. We are on a journey to enable developer friendly, mission-critical, AI enabled operational Databases across relational, non-relational and OSS offerings.
The PostgreSQL Open Source team at Microsoft works directly in the upstream PostgreSQL project and broader ecosystem to ensure PostgreSQL remains healthy, innovative, and production‑ready at global scale.
We contribute core features, performance improvements, correctness fixes, tooling, documentation, and community leadership—working shoulder‑to‑shoulder with the global PostgreSQL community. Our upstream work directly benefits millions of users and underpins Microsoft’s managed PostgreSQL offerings on Azure, while remaining 100% open source and community‑first.
We do not just value differences or different perspectives. We seek them out and invite them in so we can tap into the collective power of everyone in the company. As a result, our customers are better served.
Responsibilities
As a member of the PostgreSQL Open Source team, you will:
Design, implement, and upstream significant features and improvements to PostgreSQL core (planner, executor, storage, replication, concurrency, performance, security, etc.).
Diagnose and fix complex correctness, performance, and scalability issues in PostgreSQL.
Participate actively in the PostgreSQL community: mailing lists, patch review, design discussions, commitfests, and releases.
Collaborate with other PostgreSQL contributors inside and outside Microsoft to drive features from design through acceptance.
Represent Microsoft in the open‑source community with a strong focus on technical credibility and collaboration.
Mentor other engineers and help raise the bar for PostgreSQL expertise within Microsoft.
Influence long‑term PostgreSQL direction, especially in areas relevant to modern cloud and large‑scale deployments—while staying aligned with community values and processes. Embody our culture and values
Qualifications
Required/Minimum 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. Job Requirements: Other & Additional
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/Additional Qualifications
Strong experience with PostgreSQL internals or comparable database kernel experience.
Proven ability to work in large, mature C/C++ codebases.
Deep understanding of database systems concepts (query planning, transactions, MVCC, indexing, storage, replication, WAL, etc.).
Experience contributing to open‑source projects (PostgreSQL preferred).
Ability to write clear technical design documents and engage in constructive technical debate.
Strong debugging and performance analysis skills.
Prior accepted patches or commit access in the PostgreSQL project.
Experience with PostgreSQL query planning, statistics, or performance tuning.
Experience working on correctness, reliability, or security‑sensitive code.
Familiarity with operating systems, filesystems, and distributed systems.
Community leadership (reviewing patches, mentoring contributors, speaking at conferences).#azdat
#azuredata
# postgres
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.