PRODUCTION SYSTEM
Data Modeling Service
REST API on a Postgres-based graph database, handling 1-2k requests per second across 20 clusters for 20,000 monthly active users.
KotlinJAX-RSPostgreSQL
Software Engineer · Oslo
Eric Brattli.
Senior backend engineer with 4+ years at Cognite, building distributed systems in Kotlin and Python.
About Me
Engineering, mostly backend.
I'm a software engineer based in Oslo, working on backend systems that handle a lot of data and a lot of traffic. I've spent the last four years at Cognite, building infrastructure that customers depend on every day. Before Cognite, I studied informatics at UiT in Tromsø and worked on hospital software at DIPS.
I enjoy the kind of problems where the hard part isn't writing code, but figuring out what the right code should do. Distributed systems, data modeling, real-time collaboration. I work mostly in Kotlin and Python, but I'm comfortable picking up whatever the problem requires.
Read first, build second.
Before I write anything, I read. New domain, new system, new team. I sit with the existing code long enough to understand why it looks the way it does. Most of the time the obvious solution turns out not to be, and the hours spent reading save days of rework later.
When I do start writing, I prefer small, reversible steps. Ship a thin slice, run it in production, see what breaks. Distributed systems don't reward big-bang launches, and most of the bugs I've shipped came from being too confident too early.
Same instinct, different shapes.
The problems I gravitate to outside work look a lot like the ones I gravitate to at work. Climbing routes, mountain lines, chess positions. They all reward patience and reading the situation before making a move.
I started bouldering in Tromsø and kept at it in Oslo. Trail running and gravel cycling fill in the rest of the year. In winter, cross-country skiing through the woods is hard to beat. When the Alps line up, I head south.
Highlights
What I've worked on.
Projects that taught me the most.
REAL-TIME
Canvas Collaboration Backend
Real-time multi-user editing built with CRDTs and WebSockets, syncing changes across users with debounced persistence.
PythonCRDTsWebSockets
DEVELOPER PLATFORM
App Hosting Backend
Backend service that lets customers deploy custom applications with inherited authentication and full Cognite API access.
KotlinKtorKubernetes
Experience
Education
-
Master of Science in Informatics
Experience
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Software Engineer
- Built and maintained the Data Modeling service in Kotlin (JAX-RS), a REST API on pg3 (Postgres-based graph database) handling 1-2k requests/second across 20 clusters for 20k monthly active users.
- Developed the Schema Service in Kotlin/Ktor, a GraphQL layer on top of Data Modeling that translates user-defined schemas and GraphQL queries for the underlying REST API.
- Built the real-time collaboration backend for Canvas in Python, using CRDTs (pycrdt) and WebSockets to sync edits across users with debounced persistence.
- Developing the App Hosting backend in Kotlin/Ktor, enabling customers to deploy custom applications with inherited authentication and full Cognite API access.
-
R&D Intern (2 summers) + Part-time
- Contributed to the Spark datasource connector in Scala, translating Spark SQL queries to CDF REST API calls.
- Developed an OData connector in F# enabling Power BI and Excel integration with Cognite Data Fusion.
- Developed features for client SDKs in Scala and F#.
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Software Developer (Intern → Part-time)
- Built a drag-and-drop visual editor for designing hospital patient wristbands, working in a 4-person team.
- Developed a real-time log viewer in C#/WPF enabling developers to debug the DIPS EHR system.
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Teaching Assistant
- Teaching assistant for 6 courses including Distributed Systems, Algorithms, and Databases.
Skills
Tools I use.
Languages
KotlinPythonTypeScriptScalaF#C#
Frameworks
KtorJAX-RSFastAPIGraphQLApache Spark
Databases
PostgreSQLElasticsearch
Infrastructure
KubernetesDockerTerraformJsonnet
Outside Work
What I do when I'm not coding.
Mostly outdoors, sometimes high up.
Contact
Get in touch.
Always happy to talk about backend systems, distributed infrastructure, or anything in between. The fastest way to reach me is email.
Based in Oslo, Norway.