Nikolaos Karaolidis
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Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>
47 lines
3.4 KiB
TeX
47 lines
3.4 KiB
TeX
\datedlocatedsubsection{Nov 2024 - Present}
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{SAS Institute, Glasgow, UK}
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{Senior Associate Software Developer}
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{%
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A global leader in analytics and AI software, SAS is empowering organizations across more than 145 countries.
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\begin{itemize}
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\item Spearheaded the design and development of a microservices-based platform (\textbf{Go}, \textbf{Python}, \textbf{Postgres}, \textbf{Redis}), enabling massively parallel task execution at accelerated rates compared to the legacy solution.
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\item Architected distributed task scheduling with \textbf{Ray} and \textbf{KEDA}-powered autoscaling on \textbf{Kubernetes} clusters.
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\item Authored and maintained the platform's \textbf{unit test} suite and \textbf{CI/CD} pipelines to guarantee reliability across all services.
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\item Triaged and fixed Viya 4 UI (\textbf{TypeScript}) and backend (\textbf{Go}/\textbf{Java}) issues.
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\item Prototyped a lightweight isolation platform for the SAS language executor using \textbf{Linux kernel} capabilities and system calls.
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\end{itemize}
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}
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\datedlocatedsubsection{Jun 2023 - Sep 2023}
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{WebHotelier | primalRES, Athens, Greece}
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{Software Engineering Intern}
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{%
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With 9000+ customers in 38 countries, WebHotelier | primalRES stands as one of Europe's hospitality tech giants.
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%
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\begin{itemize}
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\item Spearheaded a complete overhaul of the company's \textbf{Grafana} dashboards, slashing the time-to-load by approximately 80\% while also increasing the number of metrics shown.
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\item Collaborated directly with the CTO to secure a year-long contract with \textbf{ClickHouse Cloud} and \textbf{AWS}.
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\item Migrated the entire metrics stack from \textbf{InfluxDB} to \textbf{ClickHouse}. This shift amped up performance by over 50\% without inflating operational costs.
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\item Engineered an open-source \textbf{Telegraf} ClickHouse plugin optimized for Terabyte-scale data outputs, outperforming the in-built plugin in terms of efficiency.
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\item Deployed Telegraf across 12 \textbf{Amazon EC2} instances, revealing and subsequently rectifying performance bottlenecks.
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\item Modernized the logging approach by transitioning to \textbf{ClickHouse}, thereby ending the thread-related challenges of the previous file-based system.
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\item Teamed up with fellow developers to incorporate \textbf{DataDog} performance monitoring into \textbf{Java} applications, improving understanding of app operations and pinpointing areas of enhancement.
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\end{itemize}
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}
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\datedlocatedsubsection{Jun 2022 - Aug 2022}
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{Softwire, Manchester, UK}
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{Software Engineering Intern}
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{%
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Working with some of the UK's leading brands, Softwire designs bespoke software and delivers innovative digital engineering expertise.
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\begin{itemize}
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\item Co-developed a pro bono web app using \textbf{React Native}, \textbf{Typescript}, \textbf{AWS Lambda}, and \textbf{AWS DynamoDB} in a 6-person team.
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\item Played a key role in building the majority of the application's \textbf{REST} backend, ensuring efficient data handling and connectivity.
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\item Participated in daily stand-ups, retrospectives, sprint planning, and review meetings.
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\item Engaged in direct client interactions, presenting progress, receiving feedback, and iterating on the application in real-time.
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\item Authored clean and maintainable code which was tested using unit, integration, and end-to-end testing.
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\end{itemize}
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}
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