Hire Apache Hadoop developers

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Viktor
Full-stack Web Developer
Austria/(GMT +1:00)
Viktor is a Senior backend and Mid-to-Senior full-stack engineer with strong Python fundamentals, practical machine learning experience, and solid product development skills. He has led end-to-end product development, combining backend engineering with machine learning and user-facing application development, and is comfortable communicating with stakeholders. His strengths include backend engineering, ML problem solving, product development, and clear communication. He is best suited for backend-heavy or ML-enabled product roles, particularly where he can contribute to building and improving data-driven products.
Experience
8 years
Availability
Part-time & Full-time
Apache HadoopPythonNext.jsReactAWSMachine learningDockerKubernetesPyTorchJavaScriptLinuxExpoScikit-learnReact NativeMongoDBElasticSearchDeep LearningData ScienceDigitalOceanAINLPComputer VisionOpenCVTensorflowRAGMicroservicesTypescriptGitGitLabEASSQLAlchemyPostgreSQLONNXpytestMicrosoft AzureNumPy
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Mahesh
Data Engineer
Germany/(GMT +1:00)
Mahesh is a Senior Data Engineer with strong expertise in AWS, Spark, and SQL, and a proven ability to build scalable, company-wide data solutions. He designed and implemented a generalized data pipeline framework that empowers even non-engineers to create pipelines via configuration, demonstrating both technical depth and architectural foresight. A pragmatic problem solver with a product mindset, Mahesh brings a rare combination of infrastructure strength, automation skill, and cross-team enablement.
Experience
13 years
Availability
Full-time
Apache HadoopSQLKubernetesPythonTerraformAWSApache SparkAirflowBig DataSnowflakeCI/CDPySparkApache KafkaRedshiftHiveLookerGitHub ActionsDBTData Warehouse
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Mario
Data Engineer
Guatemala/(GMT -6:00)
Mario is a versatile Senior Data Engineer with 17 years of experience, including leadership roles as Team Lead and CTO. He demonstrates strong self-presentation, business-oriented thinking, and proven leadership. Technical interviews confirm proficiency in SQL and architectural decision-making, with additional strengths in communication and project delivery. He is fluent in English and comfortable in both solo and team settings.
Experience
19 years
Availability
Full-time
Apache HadoopPythonAWSETLSQLApache AirflowMicrosoft SQL ServerData WarehouseKubernetesDockerSnowflakeAzure DevOpsRedshiftAPIAmazon RDSAmazon EC2PostgreSQLAWS LambdaAmazon S3PandasMySQLMongoDBDBTDatabricks
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Raymond
Full-stack Web Developer
Philippines/(GMT +8:00)
Raymond has nearly 18 years of experience spanning software engineering, cloud computing, DevOps, and technology leadership. He has founded two startups, led engineering teams, and defined technology strategy across domains including healthcare, banking, fintech, retail, and government. His expertise covers software architecture, cloud-native systems, distributed applications, and modern engineering practices.
Experience
18 years
Availability
Full-time
Apache HadoopAWSPythonReactTypescriptShopifyAnsibleMicrosoft AzureC#C++DartASP.NETMariaDBMicrosoft SQL ServerRedisApache SparkGraphQLFirebaseOpenAILangChainPostgreSQLClaude LLMNest.jsGCPKafkagRPCAI-assisted codingAI agent developmentNode.jsDjangoFastAPIFlaskSpringFirestoreClaude APIPrometheusGrafanaMavenDockerJavaGolangJavaScriptFlutterMySQL
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Guilhermo
Data Engineer
Brazil/(GMT -3:00)
Guilhermo is an experienced Senior Data Engineer with around 8 years of hands-on experience in the field. He possesses extensive knowledge of SQL, Python, Azure, and AWS, which makes him an expert in his field. Guilhermo also has a valuable background in handling AI-driven data workflows and model deployment infrastructure. His understanding of debugging concepts and ability to make sound architectural choices enables him to create robust data solutions. He has gained valuable experience with startups and is familiar with the dynamic nature of the industry. Guilhermo's proactive approach and evident enthusiasm for his work make him an excellent addition to any team.
Experience
11 years
Availability
Full-time
Apache HadoopMicrosoft AzurePythonAWSDatabricksSQLGCPDevOpsMicrosoft Power BIBigQueryETLApacheRedshiftBig DataSnowflakeData analysisApache AirflowApache SparkMySQLData WarehouseLookerTableauAWS SageMakerAirflowKafkaData ModelingSeleniumBeautifulSoup
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Alexandre
AI Engineer
United Kingdom/(GMT +1:00)
Alexandre is a senior AI and machine learning engineer with over 10 years of commercial experience, including leadership of AI teams and end-to-end delivery of production-grade ML and LLM systems. His expertise spans agentic architectures, RAG alternatives, backend API design (Python/FastAPI), and large-scale text classification. He is recognized for strong autonomy, stakeholder communication, and a practical production focus, and has exposure to large-scale systems at businesses like TikTok.
Experience
14 years
Availability
Part-time
Apache HadoopAI agent developmentLLMMachine learningPythonLangGraphRAGLangChainMulti-agent systems architectureMLOpsNLPDevOpsComputer VisionChat botsSQLOpenCVTensorflowPowerBIPyTorchKerasPandasXGBoostDockerKubernetesAWSMicrosoft AzureApache SparkApache KafkaData ScienceAPIAI-assisted codingScikit-learnDeep LearningGrafana
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Zafer
Data Engineer
Ireland/(GMT)
Zafer is a Senior Data Engineer with approximately 14 years of experience in data platform architecture, large-scale ETL, and AWS-based solutions. He has led the design and migration of high-throughput data pipelines, including Spark-to-Kubernetes orchestration and GDPR compliance projects. Feedback highlights strong system-level thinking, practical delivery, and effective cross-team communication.
Experience
15 years
Availability
Part-time & Full-time
Apache HadoopApache SparkSQLPythonAirflowAWSETLTerraformSnowflakeCI/CDKubernetesDockerPySparkBusiness intelligenceData WarehouseApache KafkaDBTJavaScalaData ModelingOraclePL/SQLAI-assisted codingAmazon S3API GatewayJWTREST APIHiveBashDatabase Management Systems
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Attila
AI Engineer
Cyprus/(GMT +2:00)
Attila is a senior AI engineer with strong hands-on expertise in AI agent systems, LLM orchestration, RAG pipelines, and classical machine learning. He has led architecture and delivery for agentic platforms, quantitative betting models, and large-scale data pipelines. His strengths include practical implementation, system integration, and direct client communication. Attila also brings leadership experience, managing teams and engaging with stakeholders.
Experience
10 years
Availability
Part-time & Full-time
Apache HadoopPythonOpenAILangChainLLMAI agent developmentPydanticAI agent orchestrationAI chatbot developmentFastAPIRAGVector DatabasesMachine learningAWSTypescriptSupabaseDjangoTwilio APIWebRTCPyTorchClaude CodePySparkCrewAIAI benchmarkingAI telemetryLinuxPandasLangGraphDevOpsReactAngularCouchDBNode.jsMCP ServerFastMCPTemporal
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Rodrigo
Data Engineer
Brazil/(GMT -3:00)
Rodrigo is a seasoned Data Engineer with over 5 years of experience. His areas of expertise include Python, Scala, and SQL. He is adept at designing and implementing data pipelines for real-time analytics and deploying machine learning projects using Python, TensorFlow, and Pandas. Rodrigo's proficiency extends to various database systems such as MS SQL Server, Databricks, Snowflake, and PostgreSQL. His work has resulted in improved decision-making processes in sectors such as Finance, Telecommunications, and more. Rodrigo excels in dynamic environments and drives projects that increase operational efficiency and intelligence.
Experience
8 years
Availability
Part-time & Full-time
Apache HadoopPythonApache AirflowSQLApache SparkMicrosoft AzureAWSElasticSearchDocker ComposeTerraformData analysisPyTorchMongoDBAzure DevOpsKubernetesTensorflowPostgreSQLMySQLData SciencePandasETLPySparkData ModelingAmazon RDSApache KafkaBig DataData WarehouseDatabricksTableauDockerSnowflakeAirflowDBTRedshiftPowerBICI/CD
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What you should know about modern Apache Hadoop devs

by Vlada Zamerets

Recruiter at Lemon.io

Verified Expert

Hiring Guide: Apache Hadoop Developers

Why Hire Apache Hadoop Developers

Hiring expert Apache Hadoop Developers is essential for organizations managing large-scale data processing and analytics. Apache Hadoop, a cornerstone of big data ecosystems, enables distributed storage and parallel processing across clusters of commodity hardware. Skilled Hadoop developers design, build, and maintain data-driven systems that handle massive datasets efficiently. Whether you’re building data lakes, implementing ETL workflows, or developing machine learning pipelines, Hadoop developers ensure optimal data scalability, fault tolerance, and performance for enterprise-grade data platforms.

What Apache Hadoop Developers Do

Apache Hadoop developers are responsible for designing and implementing robust big data solutions using the Hadoop ecosystem. They work with its core components—HDFS (Hadoop Distributed File System), YARN, and MapReduce—and integrate frameworks like Hive, Pig, Spark, and HBase to manage complex data workflows. Their expertise ensures efficient data ingestion, storage, and transformation pipelines that feed analytics and business intelligence applications. Hadoop developers collaborate with data engineers, DevOps specialists, and analysts to optimize infrastructure and extract actionable insights from raw data.

Core Responsibilities of an Apache Hadoop Developer

Design and implement data ingestion pipelines using Hadoop ecosystem tools.

Develop and maintain HDFS clusters for distributed data storage.

Write and optimize MapReduce jobs for large-scale data processing.

Integrate Hadoop with Spark, Hive, Pig, HBase, and Flume.

Implement ETL workflows for structured and unstructured data.

Monitor cluster performance and optimize resource allocation via YARN.

Ensure data security and governance using Kerberos and Ranger.

Collaborate with data scientists to prepare data for analytics and machine learning models.

Essential Technical Skills

Languages: Java, Scala, Python, SQL, Shell scripting.

Frameworks: Hadoop, Spark, Hive, HBase, Pig, Flume, Sqoop.

Tools: Ambari, Oozie, Airflow, Zookeeper, Ranger, Knox.

Databases: MySQL, PostgreSQL, Cassandra, MongoDB.

Cloud Platforms: AWS EMR, Azure HDInsight, Google Cloud Dataproc, Cloudera, Hortonworks.

Soft Skills: Data modeling, problem-solving, collaboration, and scalability planning.

When to Hire Apache Hadoop Developers

Your business handles terabytes or petabytes of structured and unstructured data.

You’re setting up or maintaining a data lake or enterprise data warehouse.

You require real-time analytics or machine learning integration.

Your existing data infrastructure struggles with scalability or performance issues.

You’re migrating legacy ETL pipelines to a distributed processing environment.

Best Practices for Hiring Apache Hadoop Developers

Assess ecosystem knowledge: Look for developers with hands-on experience across multiple Hadoop components like HDFS, YARN, and Hive.

Evaluate coding proficiency: Test Java or Python skills since MapReduce and Spark jobs often rely on these languages.

Check cluster management expertise: Ensure candidates can configure, monitor, and troubleshoot multi-node Hadoop clusters.

Review cloud experience: Candidates familiar with AWS EMR, Azure HDInsight, or GCP Dataproc can help modernize deployments.

Look for security and governance knowledge: Data compliance expertise (Kerberos, Ranger, Knox) is vital for enterprise environments.

Sample Interview Questions for Apache Hadoop Developers

“Explain the role of HDFS and how it ensures fault tolerance.”

“What’s the difference between MapReduce and Apache Spark?”

“How do you handle data ingestion in a Hadoop environment?”

“Describe how YARN manages resources in a Hadoop cluster.”

“How would you optimize a slow-running Hive query?”

“What security mechanisms are available in Hadoop ecosystems?”

Apache Hadoop in Modern Data Architecture

Apache Hadoop remains the backbone of enterprise big data solutions. While cloud-native tools have emerged, Hadoop continues to power on-premise and hybrid infrastructures with massive data storage and batch processing capabilities. Its modular ecosystem enables integration with streaming platforms like Kafka and processing engines like Spark, empowering data-driven organizations to make informed decisions. Skilled Hadoop developers play a vital role in modernizing analytics workflows and ensuring that data infrastructure aligns with business growth and innovation goals.

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FAQ

What is an Apache Hadoop developer?: An Apache Hadoop developer builds and maintains big data processing systems using the Hadoop ecosystem for distributed data storage and computation.
Is Hadoop still relevant today?: Yes. Hadoop remains a foundational big data framework, especially in hybrid and on-premise environments that handle massive data processing workloads.
How does Hadoop differ from Spark?: Hadoop uses MapReduce for batch processing, while Spark provides faster, in-memory data processing suitable for both batch and streaming analytics.
Can Hadoop run on the cloud?: Yes. Major cloud providers offer managed Hadoop services like AWS EMR, Azure HDInsight, and Google Cloud Dataproc for scalable data solutions.

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Why hire Apache Hadoop

Over 6500 companies use Apache Hadoop as their main framework, including giants like Google, Amazon and Lyft.

High-quality web apps

Apache Hadoop's modular approach lets devs reuse components, so they can seamlessly manage app complexity.

Faster development process

Apache Hadoop's architecture and a vast library of pre-built components speed up development, so you can get to market sooner.

Enjoyable user experience

From smooth, responsive interfaces to reduced loading times, devs can use Apache Hadoop to boost usability.

Scaling made easy

Apache Hadoop's modular, component-based architecture makes it easy to scale applications as traffic grows.

Case studies

Aerospace

The experience with Lemon.io has been fantastic. The interview process has been good, the caliber of people – excellent and integration has been very smooth.

Marc HorowitzCOO of SkyFi

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Telecommunications

We needed extra developers to clean off all these bugs so the company could skyrocket.

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We needed extra AI engineers to keep our ambitious project running.

Mike LukimanFounding Senior Software Engineer at Everstar.ai

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Frequently asked questions

You can find Apache Hadoop developers by searching for “Hadoop” as a keyword or main skill on job boards like LinkedIn, Indeed, or Glassdoor.

Additionally, joining communities focused on big data and Hadoop development on platforms like GitHub, Stack Overflow, or specialized forums can help you connect with potential candidates. Agencies that specialize in data engineering or big data technologies are also worth considering.

However, if you don’t have the resources or technical expertise to thoroughly vet candidates, Lemon.io can streamline the process for you. We can match you with a pre-vetted Apache Hadoop developer who meets all your criteria within 48 hours, allowing you to quickly start your project on a subscription basis.

At Lemon.io, we let clients hire talent with confidence and offer no-risk trials to help them choose the best Apache Hadoop developer. Our no-risk, paid trials allow you to work with the developer on real-world tasks relevant to your project for up to 20 hours. This helps you assess their technical skills, communication style, and how well they integrate with your team.

If the developer doesn’t meet your expectations, our 100% no-risk replacement guarantee ensures a smooth transition to another candidate.

Yes, there is a consistent demand for Apache Hadoop developers. Although not as widespread as some other data technologies, Hadoop developers are still in high demand, especially in industries dealing with big data. Apache Hadoop is essential for processing and analyzing massive datasets, making it a critical tool for companies in sectors like finance, healthcare, and e-commerce. As long as organizations need to manage and extract insights from large volumes of data, the demand for Hadoop developers will continue to be significant.

We aim to introduce you to various vetted, trained Apache Hadoop developers who can provide robust data processing and management solutions within 48 hours.

Even if more steps are required from your side, we prioritize speed and efficiency to ensure our clients get a skilled Apache Hadoop developer quickly.

We seek highly skilled senior developers who specialize in niche technologies, ensuring that your Apache Hadoop developer is an expert in big data processing and distributed systems.

Lemon.io handles the entire process, from gathering candidates and putting them through an on-site coding challenge to arranging interviews with you to determine if they are the right fit for your project or team.

We follow a very stringent multi-phase vetting and selection methodology, resulting in a 99% rejection rate of engineers during the vetting process—Lemon.io’s standards are extremely high for a reason.

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