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Senior Data Engineer with 7 years across cloud data platforms, ETL/ELT pipelines, distributed query engines (Trino), and full-stack engineering. Skilled in Python, SQL, and AWS services (EKS, EC2, S3, Lambda, Step Functions, Athena, RDS), with Kubernetes, Docker, and CI/CD; experienced in performance optimization and fintech data domains. Built automated benchmarking infrastructure and ETL/ELT pipelines, enabling self-service performance comparisons across multiple query engines and data platforms. Previously engineered production data pipelines on AWS serverless architectures, troubleshot pipeline failures, and later led feature delivery end-to-end while mentoring engineers.…Senior Data Engineer with 7 years across cloud data platforms, ETL/ELT pipelines, distributed query engines (Trino), and full-stack engineering. Skilled in Python, SQL, and AWS services (EKS, EC2, S3, Lambda, Step Functions, Athena, RDS), with Kubernetes, Docker, and CI/CD; experienced in performance optimization and fintech data domains. Built automated benchmarking infrastructure and ETL/ELT pipelines, enabling self-service performance comparisons across multiple query engines and data platforms. Previously engineered production data pipelines on AWS serverless architectures, troubleshot pipeline failures, and later led feature delivery end-to-end while mentoring engineers.

Sar El Varoner

Data Engineer, Data Scraping Specialist, Software Engineer, +2

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Senior Data Engineer with 7 years across cloud data platforms, ETL/ELT pipelines, distributed query engines (Trino), and full-stack engineering. Skilled in Python, SQL, and AWS services (EKS, EC2, S3, Lambda, Step Functions, Athena, RDS), with Kubernetes, Docker, and CI/CD; experienced in performance optimization and fintech data domains. Built automated benchmarking infrastructure and ETL/ELT pipelines, enabling self-service performance comparisons across multiple query engines and data platforms. Previously engineered production data pipelines on AWS serverless architectures, troubleshot pipeline failures, and later led feature delivery end-to-end while mentoring engineers.…Senior Data Engineer with 7 years across cloud data platforms, ETL/ELT pipelines, distributed query engines (Trino), and full-stack engineering. Skilled in Python, SQL, and AWS services (EKS, EC2, S3, Lambda, Step Functions, Athena, RDS), with Kubernetes, Docker, and CI/CD; experienced in performance optimization and fintech data domains. Built automated benchmarking infrastructure and ETL/ELT pipelines, enabling self-service performance comparisons across multiple query engines and data platforms. Previously engineered production data pipelines on AWS serverless architectures, troubleshot pipeline failures, and later led feature delivery end-to-end while mentoring engineers.

Available to hire

Senior Data Engineer with 7 years across cloud data platforms, ETL/ELT pipelines, distributed query engines (Trino), and full-stack engineering. Skilled in Python, SQL, and AWS services (EKS, EC2, S3, Lambda, Step Functions, Athena, RDS), with Kubernetes, Docker, and CI/CD; experienced in performance optimization and fintech data domains.

Built automated benchmarking infrastructure and ETL/ELT pipelines, enabling self-service performance comparisons across multiple query engines and data platforms. Previously engineered production data pipelines on AWS serverless architectures, troubleshot pipeline failures, and later led feature delivery end-to-end while mentoring engineers.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Work Experience

Data Engineer (Contract) at Splitit

January 1, 2024 - Present

Modeled payments and installments data and optimized SQL queries in a Snowflake cloud data warehouse backed by dbt. Built batch ELT data pipelines with CDC using Meltano and Apache Airflow on AWS, consolidating multiple data sources for analytics and resolving production Airflow scheduled-job (cron) failures. Developed GitHub Actions CI/CD workflows to automate data validation and pipeline deployments.

Data Engineer at Starburst

January 1, 2024 - January 1, 2026

Performed performance benchmarking and data-platform infrastructure for large-scale analytics query engines across AWS (EKS, EC2, S3) and Azure (AKS, VMs). Core engineer on a small team, automating multi-vendor benchmarking framework covering multiple analytics engines and data platforms, adopted by dozens of users across Sales, Solutions Architecture, and Engineering. Automated TPC-DS and ClickBench benchmark generation across multiple scale factors and up to very large data sizes over multiple open data-lake formats (Iceberg, Delta Lake, Hive), replacing manual JMeter-based workflows with self-serve click-to-run Docker generation. Implemented AWS infrastructure as code using Pulumi, enabling code-driven onboarding and benchmarking of new vendors. Provisioned and deployed EKS infrastructure on NVIDIA CUDA GPU EC2 instances to benchmark GPU-accelerated Trino builds. Engineered GitHub Actions CI/CD workflows and Dockerized containers powering end-to-end benchmark pipelines.

Data Engineer / Feature Owner at Liquidity Group

January 1, 2021 - January 1, 2023

Built and ran 5-10 end-to-end production ETL pipelines (daily and trigger-based) over startup onboarding data on AWS serverless architecture (Lambda, Step Functions, Athena, RDS). Debugged and fixed production failures across Lambda and Step Functions pipelines, shipping hotfixes and rollbacks to keep data workflows running. Promoted to Feature Owner: led features from requirements through implementation, breaking designs into tasks, assigning work, and tracking delivery across distributed engineering teams. Owned cohorts features end-to-end (ARPA, average revenue per account): translated Data Science and Product requirements into SQL schema design, converted a prototype into production Athena-SQL orchestrated workflows using AWS Step Functions, and shipped to production, replacing recurring manual monthly reporting by Data Science and analyst teams. Mentored junior engineers through hands-on guidance and code reviews focused on ETL, SQL, and AWS. Collaborated with Data Science, Produc

Full-Stack Developer at M.S.BitL td

January 1, 2020 - Present

Built a content management system and live chat: implemented a Node.js (Express) backend with a GraphQL API, a React (TypeScript) frontend, and MongoDB persistence for real-time chat. Worked on voice analysis research and audio processing support (Python/Flask), including debugging, maintenance, and featured development. Built a management system software product for the Israel Ministry of Education managing employee and student data (Angular).

Front-End Developer & Integration Engineer at Engageya (startup)

January 1, 2019 - Present

Developed reusable JavaScript widgets and integrated them into client websites. Built Node.js automation tools to improve internal business workflows.

Regional Sales Manager at KLS Capital

January 1, 2016 - January 1, 2017

Reported directly to the CEO and managed a loan portfolio in the automotive sector, handling roughly 50 deals per month in IL 100k-400k (~EUR 25k-100k) per deal.