(Senior) Data Engineer
2 weeks ago
Proven experience as a Senior Data Engineer or in a similar data-focused role Expert-level SQL knowledge with the ability to write and optimize complex queries Proficiency in Python with focus on pandas and structured/unstructured data formats (JSON, CSV) Strong understanding of relational databases, schemas, indexing, and query optimization Experience with large datasets, data analysis, and handling edge cases Familiarity with annotation and evaluation tasks is an advantage Excellent documentation and communication skills High attention to detail and accuracy in data processing Knowledge of financial terminology, KPIs, and enterprise datasets is considered a plus At Netguru, we're all about helping innovators and entrepreneurs shape the world through beautiful software. That is our mission. With employees from 15+ different countries, we've worked with over 800 clients from more than 50 countries. To name some of them: , , . But we're not just another tech company. As a Certified B Corporation®, we're dedicated to creating an inclusive environment for all, and we take our commitment to sustainability seriously. How freelancing works at Netguru? As a , you can choose what works well for you. You decide when, where, and how you work on projects and tasks. We match you with work that fits your skills. Plus, you have access to various opportunities across different industries and companies. That means you will not only gain more experience but also develop various skills. But there's more. Netguru freelancers can benefit from full-time collaboration and really be a part of the team. So, are you ready to make an impact? Join Netguru, and let's build beautiful software together. Role Overview Senior Data Engineer responsible for working onsite with the client’s team in Warsaw. The role focuses on handling large and complex datasets, building and optimizing data pipelines, developing queries, and supporting annotation and evaluation tasks. Full-time engagement, five days per week at the office. Details: Location: Warsaw (onsite, 5 days per week) Contract type: B2B Rate: up to €44/h (flexible, depending on experience) Start: ASAP Duration: ~6 months Benefits What's in it for you? Becoming a Netguru Freelancer means: Professionality: dev-friendly processes, like Continuous Integration and Code Review, work in line with Agile methodology. Diversity: projects from various industries like fintech, healthcare, insurance, or education. Growth: work with a team of experts and continuous development of your hard and soft skills. ,[Develop, debug, and optimize advanced SQL queries across multiple dialects (PostgreSQL, MySQL, BigQuery, etc.), Work with large datasets, design and interpret database schemas, and identify data relationships., Perform data manipulation and analysis in Python (pandas, JSON, CSV), Generate natural language questions and corresponding SQL queries, Evaluate model outputs, produce gold-standard annotations, and enriched responses., Prepare documentation and clear reasoning for downstream analysis, Collaborate within the team, provide feedback, and contribute to process improvements, Apply financial and business domain knowledge to ensure data quality and relevance] Requirements: SQL, Python, pandas, JSON, CSV, Relational database, Data analysis, Communication skills, financial terminology, KPIs, enterprise datasets Additionally: International projects, Sport subscription, Training budget, Private healthcare, Ubezpieczenie na życie, Discounts on Apple products.
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Senior Data Engineer @ Link Group
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Remote, Czech Republic Link Group Full timeRequired Skills & Experience 5–8 years of hands-on experience in data engineering or similar roles. Strong knowledge of AWS services such as S3, IAM, Redshift, SageMaker, Glue, Lambda, Step Functions, and CloudWatch. Practical experience with Databricks or similar platforms (e.g., Dataiku). Proficiency in Python or Java, SQL (preferably Redshift), Jenkins,...
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Senior Data Engineer @ 1dea
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Remote, Czech Republic 1dea Full timemin 5 yrs of relevant experience Solid experience with AWS services (S3, IAM, Redshift, Sagemaker, Glue, Lambda, Step Functions, CloudWatch) Experience with platforms like Databricks, Dataiku Proficient in Python / Java, SQL – Redshift preferred, Jenkins, CloudFormation, Terraform, Git, Docker, 2-3 years of Spark – PySpark Good communication and SDLC...
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Remote, Czech Republic INNOBO Full timeTo thrive and succeed, you are expected to have: Bachelor’s degree in computer science, engineering, or a related field, complemented by experience in data engineering. A master’s degree is preferred Extensive experience with Git and managing version control in a collaborative environment Proven track record of implementing and managing CI/CD pipelines...
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Senior Data Engineer @ hubQuest
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Remote, Warsaw, Czech Republic hubQuest Full timeWhat we expect 5+ years of professional experience as a Data Engineer or Software Engineer in data-intensive environments Strong Python development skills, with solid understanding of OOP, modular design, and testing (unit/integration) Experience with PySpark and distributed data processing frameworks Hands-on experience with Azure Data ecosystem,...
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Senior Data Engineer @ N-iX
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Remote, Czech Republic N-iX Full timeWe are looking for a Senior Data Engineer to join our client’s internal IT organization. The team is lean and highly collaborative, working closely with a BI Developer (Qlik Sense, Tableau) and a Client Lead, while partnering with an external Israeli services provider. The role is hands-on, with a strong focus on Snowflake data models and AWS Glue...
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Senior Data Engineer
1 week ago
Remote, Czech Republic N-iX Full timeRequirements: Over 4+ years of experience showcasing technical expertise and critical thinking in data engineering. Hands-on experience with DBT and strong Python programming skills. Proficiency in Snowflake and expertise in data modeling are essential. Demonstrated experience in building consumer data lakes and developing consumer analytics...
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Senior Data Engineer
1 week ago
Remote, Czech Republic N-iX Full timeRequirements: Over 4+ years of experience showcasing technical expertise and critical thinking in data engineering. Hands-on experience with DBT and strong Python programming skills. Proficiency in Snowflake and expertise in data modeling are essential. Demonstrated experience in building consumer data lakes and developing consumer analytics...
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Senior Data Engineer @ Welltech
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Remote, Warszawa, Czech Republic Welltech Full timeWhat We're Looking For As a Senior Data Engineer, you will play a crucial role in building and maintaining the foundation of our data ecosystem. You’ll work alongside data engineers, analysts, and product teams to create robust, scalable, and high-performance data pipelines and models. Your work will directly impact how we deliver insights, power product...
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Senior Data Engineer
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Remote, Czech Republic Link Group Full timeDesired Background 4+ years of experience as a Data Engineer in cloud-focused projects. Proven success in designing and maintaining large-scale data infrastructure in GCP. Advanced English communication skills, both written and spoken. Nice to Have Professional certifications in GCP or big data technologies. Practical experience with BI platforms (e.g.,...
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Remote, Czech Republic Matrix Global Services Full timeAt least 10 years as network devices SW developer. Experience with developing routers or other network elements. Hands on experience in leading development of complex features and in mentoring junior SW engineers. BSc in Computer Science, Computer Engineering, or equivalent. C, C++ proficiency. Experience with Embedded Linux networking. HW\SW development and...
