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Data Systems Scala Developers

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Coralogix
ZF
Riskified
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Paidy
Tiko
Writer
Commercetools
Ledger
CNH
SiriusXM
Leonteq
Arteris
ITV
Linklaters
ClearScore
Guardian
VakantieDiscounter
IOHK
Coralogix
ZF
Riskified
Hypervolt
Paidy
Tiko
Writer
Commercetools
Ledger
CNH
SiriusXM
Leonteq
Arteris
ITV
Linklaters
ClearScore
Guardian
VakantieDiscounter
IOHK
374+
Verified Candidates
14+
Avg. Years Experience
Top Skills
Scala Kafka Kubernetes Python
Deep Scala Network

Built through years working with teams and engineers in the Scala ecosystem.

Deep Technical Focus

We specialize in functional backend systems, data platforms, and distributed infrastructure.

Signal Over Volume

Focused, relevant introductions from a curated network.

Available Developers

QV-6934 Principal Recently added

Principal Agentic AI & Lead Data Systems Architect

United States
16 years
Remote
Employee / Freelancer

Architected a multi-agent AI system that integrates generative AI with real-time data processing, optimizing decision-making workflows in complex environments. Spearheaded the development of a scalable graph-based reasoning engine utilizing GraphRAG and LangGraph, enhancing the efficiency of large-scale data analysis. Innovated a modular orchestration framework that leverages LangChain for seamless agent communication and coordination across distributed systems.

  • Designed VertexAI-powered pipelines for real-time data ingestion.
  • Implemented dynamic agent collaboration using custom orchestration protocols.
  • Optimized graph traversal algorithms for high-performance data querying.
  • Developed cross-platform AI models with robust fault tolerance.
Generative AI GraphRAG Multi-Agent Orchestration LangChain LangGraph VertexAI
Interviewing now $205k-220k/yr
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AB-6248 Principal Recently added

Senior Software Engineer

United States
22 years
Remote
Employee

Developed high-performance distributed systems focusing on real-time data processing and analytics, leveraging Apache DataFusion for optimized query execution. Architected scalable microservices for financial transaction processing, handling millions of operations per second with low latency. Contributed to the design of a cross-platform compiler infrastructure, enhancing multi-language interoperability and performance.

  • Implemented consensus protocols for distributed databases.
  • Optimized machine learning pipelines using Python and Rust.
  • Led the migration of monolithic applications to cloud-native architectures.
  • Enhanced JVM performance for large-scale enterprise applications.
Rust Scala Python Java C Apache DataFusion
Available in 2 weeks Salary on request
Enquire
#HIRED Lead Recently hired

Senior Data Engineer

Germany
12 years
Hybrid
Employee
Experienced software engineer with strong background in distributed systems and cloud-native architecture. Proven track record delivering production systems at scale. Skilled in designing fault-tolerant services, optimising CI/CD pipelines, and mentoring junior developers across cross-functional teams.
  • Led migration of monolithic system to microservices architecture
  • Built high-throughput data pipeline processing 1M+ events per second
  • Designed and implemented real-time monitoring and alerting platform
Scala Flink Airflow Iceberg GCP Docker Spark Kubernetes
Hired Salary: $XXX,XXX
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AG-5969 Senior

Data Engineer

United Kingdom
7 years
Hybrid
Employee

Engineered large-scale data processing pipelines using Apache Spark and Scala, significantly enhancing data throughput. Developed real-time data ingestion systems with Apache Kafka, ensuring high availability and fault tolerance. Expert in streaming analytics, applying Flink for dynamic data transformations in IoT applications.

  • Integrated Scala Play for responsive web data visualization
  • Utilized Cats Effect for functional programming concurrency control
  • Designed a custom schema registry for Kafka message validation
  • Implemented end-to-end data encryption in distributed environments
Scala Apache Spark Kafka Flink Scala Play Cats Effect
Available in 3+ months £80k-95k/yr
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GZ-8621 Principal

Big Data Engineer

Poland
15 years
Flexible
Employee / Freelancer

Led the design and implementation of distributed data processing systems handling petabyte-scale datasets. Spearheaded the integration of Kafka with Spark for real-time analytics pipelines in financial services. Architected a high-performance data ingestion framework using Akka to optimize processing speed and reliability.

  • Developed custom SQL query optimization techniques for large datasets
  • Implemented Git versioning for complex data workflows
  • Pioneered Akka-based microservices for scalable data processing
  • Optimized Spark jobs reducing runtime by 30%
Spark Scala SQL Kafka Akka Git
Available in 2 weeks €35-44/hr
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CB-2111 Principal

Senior Data Engineer

United Kingdom
15 years
Flexible
Employee / Freelancer

Architected and managed large-scale data processing pipelines using Apache Spark, achieving real-time analytics capabilities. Led the migration of legacy systems to a cloud-based data lake architecture, improving data accessibility and scalability. Developed machine learning models for predictive analytics within the financial sector.

  • Integrated Kafka streams for real-time data ingestion
  • Enhanced ETL processes with Scala and functional programming
  • Implemented robust data governance frameworks in Hadoop
  • Optimized Spark jobs for cost-effective resource usage
Scala Python Java JavaScript Apache Spark Hadoop
Interviewing now Salary on request
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NM-8146 Senior

Spark Performance Engineer - Data Engineer

Spain
7 years
Employee / Freelancer

Designed and optimized large-scale distributed data processing systems using Apache Spark, focusing on performance enhancements for data-intensive applications. Developed custom Spark transformations and actions, significantly reducing execution time for ETL pipelines in the financial analytics domain. Integrated Rust components with Scala to improve computational efficiency in real-time data processing.

  • Implemented advanced caching strategies for Spark job optimization.
  • Contributed to open-source Apache DataFusion project with Rust.
  • Developed PySpark solutions for streaming data pipelines.
  • Led migration of legacy data systems to cloud-based infrastructure.
Apache Spark Spark Performance Tuning Scala PySpark Rust Apache DataFusion
Available in 2 weeks €100k-110k/yr
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JE-6958 Principal

Freelance Software | Data | ML Engineer

Denmark
12 years

Developed machine learning pipelines for real-time data analysis and prediction. Deployed distributed systems on AWS Fargate for scalable processing.

  • Optimized text processing with TF-IDF and k-NN
  • Automated data migration using AWS DMS
  • Implemented dimensionality reduction with PCA for feature optimization
Python AWS Fargate TF-IDF k-NN PCA AWS DMS
Salary on request
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NZ-3031 Principal

Senior Scala Developer

Netherlands
20 years
Remote
Freelancer

Architected distributed systems with Scala and Kafka, achieving high throughput and fault tolerance. Built containerized applications orchestrated with Kubernetes, enhancing deployment efficiency across cloud environments. Designed infrastructure as code using Terraform, streamlining resource provisioning and management.

  • Implemented event-driven architectures with ZIO.
  • Migrated legacy systems to cloud-native microservices.
  • Developed custom middleware solutions for data streaming pipelines.
Scala ZIO Kafka Kubernetes Terraform Java
Available in 2 months $100-125/hr
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NU-3141 Principal

Staff Data Engineer

Germany
12 years
Flexible
Employee / Freelancer

Architected large-scale data pipelines using Apache Spark and Scala, optimizing for real-time analytics in the e-commerce domain. Spearheaded the migration of data infrastructure to Databricks, enhancing processing speed and reliability. Developed a custom data validation framework in Python, ensuring data integrity across distributed systems.

  • Implemented Rust-based data transformation tools for performance gains
  • Designed SQL-based ETL workflows for complex data models
  • Automated data quality checks using custom-built Python scripts
Scala Python Rust SQL Apache Spark Databricks
Interviewing now Salary on request
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GX-8402 Mid-level

Data Engineer

Spain
5 years
Flexible
Employee / Freelancer

Engineered data pipelines for processing terabytes of e-commerce transaction data, enhancing data accessibility and insights. Built ETL processes for a healthcare analytics platform, improving data quality and processing efficiency. Developed a recommendation engine for a retail platform using collaborative filtering techniques.

  • Automated data validation processes using Scala and Apache Spark
  • Implemented data warehousing solutions with optimized query performance
  • Created a scalable data ingestion framework using Kafka and Flink
  • Streamlined data visualization dashboards with real-time analytics
Scala Java HTML CSS JavaScript React.js
Interviewing now $40k-50k/yr
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WZ-4811 Principal

Software Engineer / Data Engineer

Canada
22 years
Flexible
Employee / Freelancer

Developed large-scale distributed data processing systems for real-time analytics. Specialized in building high-performance ETL pipelines and data warehousing solutions. Designed and optimized custom consensus protocols for fault-tolerant systems.

  • Implemented complex event-driven architectures for financial services.
  • Architected scalable microservices using Go and Rust.
  • Enhanced database internals for improved query performance.
Java Scala Go Rust C++ TypeScript
Interviewing now Salary on request
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SE-4112 Senior

JVM Developer / Data Engineer

Poland
8 years
Flexible
Freelancer

Designed and optimized a high-throughput real-time data processing pipeline using Kafka and Spark, achieving sub-second latency. Developed microservices architecture for a large-scale distributed system leveraging Akka and Spring frameworks.

  • Implemented event-driven architectures with Apache Kafka
  • Built scalable data pipelines with Apache Spark
  • Optimized distributed system performance for large-scale deployments
Java Scala Spring Akka Kafka Spark
Interviewing now €45-55/hr
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ET-4010 Principal

Founding Database Engineer

Germany
20 years
Flexible
Employee / Freelancer

Pioneered database internals and distributed systems design. Advanced knowledge in operations and systems design using AWS.

  • Pioneered database internals
  • Expert in distributed systems design
  • Advanced AWS operations knowledge
Distributed Systems Database Internals Systems Design Operations AWS Java
Available in 2 weeks €120k-160k/yr
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SS-9069 Senior

Software Engineer, Backend

Singapore
6 years
Flexible
Employee / Freelancer

Engineered backend systems using Scala with a focus on functional programming. Built fault-tolerant services with ZIO for distributed systems. Developed GraphQL APIs using Caliban for seamless client-server interactions.

  • Utilized Cats library for functional programming patterns
  • Optimized SQL queries for high-volume transaction systems
  • Developed Python utilities for backend service monitoring
Scala SQL Python ZIO Cats Caliban
Interviewing now $100k-120k/yr
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