Hire the Best ETL Developers in California

Seasoned Data Engineer & Backend Developer with deep expertise in building high-performance, secure, and scalable data platforms for industries like Fintech, Health & Nutrition Tech, Digital Media (Amazon Music), Insurance, and Gaming/Sports Betting. I specialize in Python-driven data architectures on AWS and Azure, enabling real-time analytics, rigorous data quality, and secure data handling for batch and streaming workloads. My solutions turn complex datasets into business intelligence that powers product innovation and regulatory compliance. 🔹 Cloud-Native Data Pipelines – Expert in architecting ELT/ETL workflows using Apache Airflow, DBT, AWS Glue, and Azure Data Factory. 🔹 Streaming & Real-Time Systems – Built Kafka- and Kinesis-based pipelines with schema registry, Spark Streaming, and Azure Event Hubs. 🔹 Secure & Governed Architecture – Implemented granular IAM, end-to-end encryption, metadata lineage (AWS Glue Catalog, Azure Purview), and compliance controls for SOC and HIPAA-style standards. 🔹 Backend & Microservices – Designed modular FastAPI/Flask services, asynchronous job queues (Celery, Lambda), and robust APIs (OAuth2, JWT, API Gateway). 🔹 Data Modeling & Storage Optimization – Skilled in dimensional models, data vaults, and tuning storage engines (PostgreSQL, Redshift, Snowflake, S3/ADLS Lakehouses). 🎧 On Amazon Music, I contributed to scalable event-driven services and analytics pipelines that processed billions of user interactions to drive personalization and reporting. ✅ Let’s work together if you need: Real-time & batch data infrastructure Secure cloud data platforms (AWS, Azure) Streaming data ingestion & CDC (Debezium, Kafka) Optimized data lake/warehouse design Backend services to support analytics and product features 📈 Whether you're building a modern data stack or re-architecting legacy systems, I bring hands-on expertise, architectural clarity, and a delivery mindset.

I am an accomplished data analyst with more than 10+ years of experience in data analysis and reporting helping businesses make stronger decisions with their data. I have worked in both Financial companies like ADP and a few years in the Mortgage Industry. Check out my portfolio below on some analytics I have done. Whether you need help with creating powerful dashboards using any visualization product such as Power BI, Microsoft Reporting Services, Tableau, or Excel, or you need to clean your data, I will be your go-to person. Reliable and excellent communication and leadership skills, with a track record of successful project management and team collaboration. ⭐ Why you should choose me over other freelancers ⭐ ✅ Past Reviews: I put 100% focus on the quality of work I provide to my clients and aim to earn their trust. ✅ Over-delivering: This is one of my weaknesses. I tend to over-deliver and make sure the client is satisfied with my work as a freelancer. ✅ Responsiveness: Being on top of my communication and being extremely open with my clients. ✅ Resilience: reach out to any of my current or former clients and ask them about my resilience. ✅ Kindness: I make sure I treat all my clients the way I want to be treated, with respect and understanding, aiming to improve my client's work. Working with me, you will ✅ Stop struggling with data that's not telling a story ✅ Get analytics of your data including clean graphs and KPIs that would help you make quick decisions just by looking at it. ✅ Get to understand your data better ✅ Get a report that's built once and can be set up for refresh daily thus saving you money. 🏆 Reviews and feedback from clients 🏆 Below are my client testimonials describing the work and value you should expect from me. ⭐⭐⭐⭐⭐ "Issak Dure is an exceptional Power BI Data Analyst whose work consistently exceeded our expectations. His deep understanding of data analysis combined with his expertise in Power BI allowed us to uncover valuable insights from our data. Issak's attention to detail, analytical skills, and ability to communicate complex findings in a clear and concise manner were instrumental in driving our project's success. He was a true asset to our team and I highly recommend him for any Power BI data analysis work."- David P. ⭐⭐⭐⭐⭐ "I had the pleasure if working with Issak at AAG for a couple of years after he was hired as a new member of the team. Issak stood out from the rest of the candidates interviewing for the same position with his technical capabilities, analytical thought and communication skills. Once hired, he quickly came up to speed by learning about the business and becoming an expert BI developer. Issak's ability to not only develop and deliver high quality analytical reports but also interface with various business teams to iterate and build requirements for report development made him an invaluable asset to the team. I can't recommend Issak highly enough for any Data / Business Analytics projects and would hire him in a heartbeat if the opportunity arises!" -Jyothi H. | Business Analytics

Hi there! I'm a seasoned Data Engineer with a strong background in delivering client-focused, end-to-end data solutions. Over the past couple years, I've honed my skills working directly with clients in fast-paced environments, building robust AWS-based ETL pipelines, orchestrating data lake formations, and leading complex cloud data migrations. - What I Bring to the Table: Proven Data Engineering Expertise: AWS & Cloud Data Migrations: I've developed custom ETL pipelines that integrated PostgreSQL RDS data with S3-based data lakes and Salesforce. I’ve also spearheaded Oracle-to-Redshift migrations, ensuring data integrity with tools like AWS SCT and DMS. Comprehensive AWS Skillset: Proficient with AWS Glue, Step Functions, SNS, Secrets Manager, IAM, and more, I ensure that data processes are both secure and scalable. Strong Analytical & Technical Acumen: Diverse Programming Skills: I’m fluent in Python, SQL, Java, and I leverage libraries such as Pandas and PySpark for data manipulation and analysis. ETL/ELT Expertise: I design, implement, and optimize pipelines that drive actionable insights. - Client-Focused Solutions Tailored Business Insights: Previously, I worked as an Inventory Analyst, where I integrated data sources like NetSuite and Excel into intuitive Tableau dashboards. My work enabled better forecasting, streamlined inventory management, and improved decision-making. Certified as an AWS Solutions Architect and Data Engineer, with pending certifications in Machine Learning, I’m committed to continuous growth and adept at using AWS to empower businesses with scalable, efficient data solutions.

Cloud Solution Architect with engineering experience in Cloud SQL Big Data technologies including Data Architecture to support various Business Intelligence needs. Solution Architect in Technical Teams on Cloud Data Solutions into various Cubes, Data Marts, and ERP Systems. Developed data structures for business using various Analysis Services Cubes, BI Dashboard, and Scorecards. Recent experiences include developing multiplayer AI Platform with Generative AI using AWS Bedrock for back-office CareManagement application including HealthCare. Implementations included Anthropic Claude model & Twilio Integration for Client Onboarding, Authentication, and Call Flow Management. Cloud Services Database include Snowflake Data Cloud, Azure Cloud, Go/Language (JSON and yaml) with Anaconda python programming. Migrated Data Lakes from on-prem up to SnowFlake using SnowPipe and SnowSQL using command line scripts using AI methods. Implemented standards and data designs for HIPAA, SOX, regulatory, compliance, financial, reporting, and auditing. Next generation AI development with Anthropic Claude Code, ChatGPT, Gemini, etc.

Full-stack Python3/SQL Data Engineer & Analyst; ETL/ELT, API Integrations, Automated Data Pipelines, Web Scraping, Database Management, Data Visualization (Real-Time Dashboards and Scheduled Reports), Helper Scripts (Headless for servers and UI-based for non-technical users), and Technical Support/Coaching. If a computer can do it, I will make it happen... My preferred tech stack: [Dataviz] - Google Data Studio/Sheets/Apps Script (free BI for low/no budget shops) - PeriscopeData (aka Sisense Data; BI for larger shops with more expertise) - AWS Quicksight (great choice if already using AWS) - Looker (for larger shops who don't mind investing and locking-in their business with LookML; SQL is still required) - Grafana/InfluxDB (best real-time BI / monitoring for any shop) - Plotly (legacy only; still good for in-house BI) [Development] - Python3/Django (pretty much everything, all the time; simple web apps, PWAs, cross-platform apps, mobile apps, etc.) - Jenkins (classic CI/CD; still gets the job done) - Airflow/MWAA (next-gen Python CI/CD; MWAA is a great choice if already using AWS) - Playwright/Puppeteer/HMTL5/CSS (mainly web scraping and web test automation) - AutoIT (large-scale Windows PC deployments) [Database] - PostgreSQL (best all-purpose DB in the world; newer versions excellent for OLAP, OLTP, and NoSQL/JSONB) - AWS Redshift (PostgreSQL-powered data warehouse for larger datasets and queries) - AWS Athena/Iceberg (data lake for true "big data") - SQLite (better for tiny/localized projects) - MySQL (mostly just for Wordpress, etc.) [Webserver] - AWS (best-in-class cloud infrastructure, but tends to be expensive) - Fly.io (excellent cloud option for low/no budget shops) - Heroku (excellent cloud option for low budget shops) - DigitalOcean (cloud VPS; very flexible for small and large shops) - Vultr (cloud VPS; very flexible for small and large shops) Message me if you have any questions!

⭐ || TOP RATED PLUS || ⭐ From robust infrastructure to advanced analytics, I provide the tools and support you need to drive innovation and achieve success in the digital age. 🏆 Achieved Top-Rated PLUS Freelancer status (Top 3%) with a proven track record of successfully completing 10 projects. Experienced Data Engineering and Analytics leader with expertise in building and growing amazing teams. Expertise includes data strategy and planning, data engineering, reporting and insights. Experience with 'Big Data' cloud technologies (Spark/hadoop/hive/pig/presto/Redshift/Snowflake), traditional databases (Oracle, Teradata) and traditional BI platforms (MS BI) and visualization tools (Tableau), Data pipeline/ETL architecture, and overall business alignment for optimal data impact. Specialties Data Warehouse, Data Engineering, Data Architecture, Data Modeling, Big data batch processing, Stream processing, Data tools, Data Analytics, Data operations and Data lifecycle management, and enabling Experimentation and Machine learning. Some of the technologies that we work with are: - Power BI - Azure cloud services - SQL Server - Snowflake - EDA - Tableau - Python - BigQuery - Microsoft Excel (Macro, VBA) - Web development using PHP as well as node.js - PySpark - Looker Studio - And many more... You possess the data? Fantastic!! I can assist you in scrutinizing it using Python, encompassing exploratory data analysis, hypothesis testing, and data visualization. Do you boast Big Data? Even more splendid!! I am adept at aiding you in the cleansing, transformation, storage, and analysis of large datasets, employing big data technologies and deploying them using cloud services such as AWS and Azure Cloud. Are you keen on monitoring business KPIs and metrics? No issue at all!! I can even guide you through the development of reports using Tableau and PowerBI, ensuring you consistently stay at the forefront of your business. Anticipate unwavering integrity, superb communication skills in English, technical proficiency, and enduring support for the long term.