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Coralogix
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Riskified
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Paidy
Tiko
Writer
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Ledger
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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
354+
Verified Candidates
12+
Avg. Years Experience
Top Skills
Scala Java Kubernetes 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

NZ-2211 Lead Recently added

Scala Engineer

United Kingdom
15 years
Flexible
Employee

Designed and implemented a high-frequency trading platform handling millions of transactions daily, optimizing for low-latency execution. Developed a distributed data processing system using Scala Cats for functional programming paradigms to streamline financial data analysis. Led the architecture of a real-time recommendation engine, integrating machine learning models for personalized user experiences.

  • Built a microservices architecture with Spring Boot and Spring Batch
  • Integrated Angular-based front-end with Scala back-end systems
  • Optimized JVM performance for large-scale data processing applications
  • Enhanced concurrency management in multi-threaded environments
Scala Scala Cats Java Spring Boot Spring Batch Angular
Interviewing now Salary on request
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EL-6427 Principal Recently added

Senior Scala Engineer

Switzerland
15 years
Remote
Employee / Freelancer

Architected event-driven systems leveraging Event Sourcing and CQRS to ensure data consistency. Pioneered the use of Scala for building scalable, fault-tolerant distributed applications. Designed and implemented microservices to support large-scale fintech platforms.

  • Integrated TypeScript for enhanced front-end type safety
  • Developed domain-driven design models for enterprise applications
  • Implemented Dart-based solutions for cross-platform mobile applications
Scala Java TypeScript Dart Event Sourcing CQRS
Interviewing now £140k-150k/yr
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#HIRED Lead Recently hired

Lead Scala Engineer

Spain
6 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 Spark Flink Airflow GCP Python Delta Lake Docker
Hired Salary: $XXX,XXX
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AE-4003 Lead

Senior Staff Application Engineer

United Kingdom
13 years
Flexible
Employee / Freelancer

Specialized in building high-availability distributed systems for financial transaction processing, handling millions of transactions per second. Developed a microservices architecture for a real-time analytics platform, optimizing data throughput and latency. Implemented consensus protocols to ensure data integrity across a multi-region cloud infrastructure.

  • Architected a scalable event-driven messaging system using Kafka
  • Designed RESTful APIs for a global e-commerce platform
  • Integrated Rust for performance-critical components in data pipelines
  • Optimized SQL queries for a 10TB data warehouse
Scala SQL Typescript Java Rust Backend
Available in 1 month Salary on request
Enquire
AP-1643 Lead

Lead Software Engineer

Switzerland
10 years
Hybrid
Employee

Designed and implemented distributed systems for high-frequency trading platforms, focusing on low-latency data processing using Akka and Scala. Architected microservices for a large-scale e-commerce application, leveraging Vert.x to handle millions of concurrent transactions efficiently. Developed a real-time analytics engine for IoT data streams, optimizing performance on JVM environments.

  • Optimized JVM performance for large-scale data processing applications
  • Integrated Node.js with Scala for hybrid application architectures
  • Implemented complex event processing with Akka Streams
  • Built RESTful APIs using TypeScript for scalable web services
Scala Java Backend Architecture Distributed Systems Blockchain Infrastructure REST APIs
Interviewing now $150k-180k/yr
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NL-1941 Principal

Senior Scala Developer

Netherlands
25 years
Flexible
Freelancer

Specialized in designing distributed systems with a focus on real-time data processing pipelines. Led the development of a high-performance, event-driven architecture leveraging Scala and ZIO for fault tolerance and scalability. Optimized cross-service communication using gRPC for microservices in a large-scale enterprise environment.

  • Implemented custom Tapir-based API gateway solutions
  • Architected SQL-driven data analytics platforms
  • Developed concurrent processing frameworks with Java
  • Enhanced system resilience with advanced ZIO constructs
Scala ZIO Java SQL gRPC Tapir
Interviewing now €95-105/hr
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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
Interviewing now €90k-120k/yr
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SS-9357 Lead

Software Engineer

France
10 years
Flexible
Employee

Specializes in building scalable backend services with Scala and Kafka. Developed fault-tolerant systems using Play Framework and http4s.

  • Integrated Cats Effect for functional programming paradigms
  • Optimized message processing with Kafka Streams
  • Designed microservices architecture for high availability
Scala Play Framework Spring Boot Kafka Cats http4s
Interviewing now $70k-75k/yr
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AM-1682 Mid-level

Scala Backend Developer

Poland
3 years
Flexible
Employee / Freelancer

Developed high-throughput data processing pipelines using FS2 and Cats Effect. Implemented tagless-final style architectures to enhance modularity and testability of backend services. Contributed to the design of a reactive microservices ecosystem optimized for fault tolerance.

  • Built scalable event-driven systems with Scala and Kafka
  • Integrated functional programming paradigms for robust error handling
  • Optimized JVM performance for low-latency applications
Scala Java Cats Cats Effect FS2 tagless-final
Available in 2 weeks €30k-35k/yr
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AN-6869 Senior

Fullstack developer

France
9 years
Remote
Employee / Freelancer

Developed a distributed event-driven microservices platform for financial transactions processing. Designed a high-performance, fault-tolerant data pipeline handling over 10 million events per day. Implemented a real-time analytics dashboard using Scala and Go for monitoring system metrics and user activity.

  • Optimized SQL queries for sub-second response times
  • Built RESTful APIs in Scala for e-commerce platforms
  • Integrated third-party authentication services using OAuth2
  • Implemented CI/CD pipelines with Bash and Python scripting
Scala Go Python Java SQL Bash
Available in 3+ months €65k-70k/yr
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CB-2510 Lead

Senior Scala engineer

Czech Republic
13 years
Remote
Employee

Architected a robust event-driven architecture for large-scale IoT data ingestion. Enhanced a supply chain management platform with Scala and Kafka for real-time analytics. Developed a high-throughput messaging system using Typelevel libraries.

  • Implemented PostgreSQL optimizations for high-volume data storage
  • Utilized Go for microservices orchestration
  • Contributed to open-source Scala libraries
  • Configured Linux servers for enhanced application performance
Scala Typelevel PostgreSQL Kafka Linux Go
Available in 2 weeks €70k-85k/yr
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AL-9947 Principal

Senior Scala Developer / Team Leader

Poland
12 years
Remote
Employee / Freelancer

Led the development of a distributed event-driven microservices architecture using Akka and Play. Specialized in high-performance, non-blocking I/O operations and asynchronous data processing. Designed scalable RESTful APIs for large-scale enterprise applications, optimizing database interactions with Slick.

  • Implemented custom streaming solutions using Akka Streams
  • Optimized performance of real-time data pipelines
  • Architected distributed systems for fintech applications
Scala Akka Play Http4s Cats Slick
Available in 1 month Salary on request
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EH-3800 Principal

Senior Scala Developer

Netherlands
19 years
Flexible
Employee / Freelancer

Built distributed microservices architecture handling millions of requests per second. Architected real-time data processing pipelines using Akka and Kafka for high-throughput applications. Designed and deployed scalable cloud infrastructure on AWS for global reach applications.

  • Implemented event-driven systems with Akka Streams
  • Optimized JVM performance for large-scale enterprise applications
  • Developed multi-region failover strategies on AWS
Scala Java Python Akka Kafka AWS
Interviewing now €50k-80k/yr
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WW-6611 Lead

Ingeniero de Software Senior

Spain
23 years
Flexible
Employee

Led development of high-performance backend services for e-commerce platforms, focusing on scalability and reliability. Engineered data-intensive applications with SQL Server, optimizing database interactions for complex queries.

  • Built RESTful APIs for large-scale web applications
  • Enhanced legacy systems with modern programming paradigms
  • Implemented cross-platform solutions using C# and Rust
Scala Java Python Rust C# SQL Server
Interviewing now €55k-65k/yr
Enquire
ES-7679 Mid-level

Backend Engineer

United States
4 years
Flexible
Employee / Freelancer

Developed distributed data processing systems leveraging Scala and Java, optimizing performance for real-time financial analytics. Integrated complex SQL queries into backend services to support dynamic reporting features in a high-traffic e-commerce platform. Implemented RESTful APIs using TypeScript to enhance interoperability across microservices.

  • Optimized database interactions for a 1TB daily transaction system.
  • Built event-driven architecture using Kafka for asynchronous processing.
  • Automated deployment pipelines with Bash for continuous integration.
  • Enhanced frontend-backend communication with WebSocket protocols.
Scala Java SQL TypeScript JavaScript Bash
Interviewing now Salary on request
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