Duarte Nunes
Senior Software Engineer at Datadog
São Paulo, Brazil
Summary
🤩
Rockstar🎓
Top SchoolDuarte Nunes is a senior software engineer based in São Paulo with 15 years of experience building high-performance, low-latency distributed systems. He has deep systems programming expertise honed at ScyllaDB and Seastar, contributing core storage, commit log, and networking improvements to widely used open-source NoSQL infrastructure. At Datadog he applies that background to observability and distributed systems problems, while also co-founding Umani to drive product and technical strategy. Duarte’s contributions to AWS CDK and AppSync integrations show he moves easily between low-level engine work and cloud infrastructure. Known for surgical, performance-minded changes—such as shadowable tombstones and in-memory data structure improvements—he blends academic rigor from ISEL with pragmatic engineering at startups and scale-ups. Off the beaten path, his GitHub persona hints at a playful curiosity that complements a serious focus on efficient, reliable systems.
15 years of coding experience
11 years of employment as a software developer
Software for the Cloud and Big Data, Software for the Cloud and Big Data at LASER Summer SchoolBS, Computer and Software Engineering, BS, Computer and Software Engineering at ISEL
Portuguese, English, Spanish
Stackoverflow
852reputation
11kreached
10answers
6questions
cassandra
top-5%
Github Skills (41)
aws-appsync10
c-language10
aws-cdk10
back-end-development10
nosql10
futures10
sstable10
async10
memory-management10
databases10
typescript10
data-structure10
amazon-dynamodb10
dynamodb10
aio10
Programming languages (13)
Github contributions (5)
scylladb/scylladb
Mar 2016 - Mar 2019
NoSQL data store using the seastar framework, compatible with Apache Cassandra
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1179 commits, 1 PR, 361 pushes in 3 years
Contributions summary:Duarte primarily focused on implementing features related to the ScyllaDB database's data storage and management. Their commits introduced functionality for shadowable tombstones, improved the handling of view updates, and implemented logic for managing the in-memory representation of the data. They also contributed to core components like the commit log and code related to secondary indexes. The user's work involved modifying existing data structures and logic in core aspects of the ScyllaDB project.
cppnosqlseastarcassandrasql
scylladb/seastar
Mar 2016 - Sep 2019
High performance server-side application framework
Role in this project:Back-end Developer
Back-end DeveloperContributions:87 commits, 20 PRs, 81 pushes in 3 years 6 months
Contributions summary:Duarte primarily contributed to the `seastar` repository by implementing and improving core features of the high-performance server-side application framework. Their work focused on enhancing network functionalities by improving error messages related to IPv4 address parsing and memory management, as well as optimizing the core futures library. The user also implemented core code changes for the networking and testing utilities.
seastarc-plus-plusdpdkframeworkperformance
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