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Data Systems Scala Developers

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Coralogix
ZF
Riskified
Hypervolt
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
330+
Verified Candidates
12+
Avg. Years Experience
Top Skills
Scala Kafka Python Docker
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

GZ-8621 Principal Recently added

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 €53-66/hr
Enquire
NM-8146 Senior Recently added

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
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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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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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
Enquire
AF-5918 Principal

Architect / Lead Data Engineer

United Kingdom
23 years
Freelancer

Designed and optimized large-scale data lakes and real-time streaming architectures using Apache Spark and Flink. Led migration of on-premise data warehouses to AWS cloud infrastructure, improving scalability and reducing latency. Specialized in developing ETL pipelines for financial analytics and risk management systems.

  • Developed proprietary data ingestion framework for high-throughput processing
  • Integrated machine learning models into data pipelines for predictive analytics
  • Architected multi-region data replication solutions for disaster recovery
Scala Java Python Spark Flink AWS
Available in 2 weeks Salary on request
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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
Enquire
JN-3522 Senior

Senior Data Engineer

India
9 years
Flexible
Employee / Freelancer

Developed real-time data processing systems utilizing Apache Kafka and Apache Flink to handle streaming data at scale. Designed and optimized ETL pipelines for large-scale data ingestion and transformation using Apache Spark. Implemented HBase solutions for high-throughput, low-latency data storage in big data environments.

  • Architected distributed systems for high-volume data processing
  • Built scalable data lakes with fault-tolerant architectures
  • Optimized data transformation pipelines for performance and reliability
Apache Kafka Apache Spark Apache Flink HBase Big Data ETL
Available in 1 month Salary on request
Enquire
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 €68-83/hr
Enquire
LY-1002 Principal

Senior Data Engineer

United States
11 years
Remote
Employee / Freelancer

Architected and implemented end-to-end ETL pipelines in Scala and Python, handling petabyte-scale datasets in cloud environments. Spearheaded the development of a real-time analytics platform for IoT data, enhancing data throughput and processing speed.

  • Led migration of legacy systems to modern cloud infrastructures
  • Developed custom data serialization protocols in Go
  • Automated data workflows using advanced Bash scripting techniques
Python SQL Scala Bash Java Go
Interviewing now $120k-150k/yr
Enquire
EP-9902 Lead

Senior Engineer / Technical Lead

United Kingdom
20 years
Hybrid
Employee / Freelancer

Led the design and implementation of a distributed event streaming platform using Akka and Kafka. Spearheaded big data processing initiatives with Spark on AWS for analytics.

  • Developed large-scale data pipelines with Apache Spark
  • Managed team of engineers for complex system integrations
  • Optimized server-side rendering with Play Framework
Scala Akka Spark Play Kafka AWS
Available in 2 weeks Salary on request
Enquire
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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SF-4260 Lead

Open Source Maintainer

Portugal
8 years
Flexible
Employee / Freelancer

Led the development and maintenance of a widely-used open-source Scala library, focusing on concurrency and performance improvements. Contributed to the DIDComm protocol implementation, enhancing secure communication for decentralized applications.

  • Developed containerized applications using Docker and Scala.js
  • Implemented advanced error handling with ZIO
  • Optimized Linux-based environments for high-performance computing
Scala Scala.js Linux ZIO Docker DIDComm
€100k-120k/yr
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WH-5508 Lead

Senior Software Engineer

United States
10 years
Remote
Employee / Freelancer

Led the development of a distributed microservices architecture using Go and Rust, optimizing for high throughput and low latency in financial transaction systems. Spearheaded a project to refactor a legacy monolith into a scalable, cloud-native application using TypeScript and JavaScript.

  • Implemented real-time data pipelines in Python
  • Designed a fault-tolerant messaging system
  • Optimized Java-based backend for 10x speed improvement
Go Python Rust TypeScript JavaScript Java
Available in 2 weeks $120k-150k/yr
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ZY-7052 Staff

Staff Engineer

Portugal
10 years
Remote
Employee / Freelancer

Architected a real-time analytics platform utilizing Scala and Kotlin for processing millions of events per second. Engineered a cross-platform mobile application backend in Python and TypeScript, supporting over 10 million users. Led a refactoring project to transition a monolithic Java application to a microservices architecture.

  • Implemented a high-performance caching layer using Java and Redis.
  • Integrated a serverless solution using JavaScript for event-driven workflows.
  • Developed a machine learning pipeline in Python for predictive analytics.
Scala Kotlin Java JavaScript Python TypeScript
Available in 2 weeks $115k-130k/yr
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