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Backend 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
283+
Verified Candidates
11+
Avg. Years Experience
Top Skills
Scala Kubernetes Kafka AWS
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

WK-9239 Principal Recently added

Senior Kotlin backend developer

Sweden
25 years
Hybrid
Employee / Freelancer

Designed and implemented large-scale microservices architectures using Scala for financial transaction systems, ensuring high availability and fault tolerance. Developed real-time data processing pipelines for a cloud-based analytics platform, optimizing for low latency and high throughput. Contributed to the development of reactive systems, enhancing system responsiveness and scalability in distributed environments.

  • Led migration of legacy Java systems to Kotlin microservices
  • Implemented event-driven architecture for a retail analytics platform
  • Optimized cloud resource allocation, reducing operational costs by 30%
  • Developed secure API gateways for fintech applications
Java Scala Kotlin Microservices Reactive architecture Cloud
Available in 1 month €100k-140k/yr
Enquire
SA-6380 Senior Recently added

Backend Software Engineer

Netherlands
10 years
Flexible
Employee

Developed scalable messaging systems using Kafka and ActiveMQ, optimizing data flow for real-time analytics. Architected microservices with ZIO to enhance fault tolerance and concurrency control in distributed environments.

  • Designed high-throughput data pipelines with Protobuf serialization.
  • Optimized PostgreSQL queries for complex reporting applications.
  • Implemented event-driven architectures for financial transaction processing.
Scala ZIO PostgreSQL ActiveMQ Kafka Protobuf
Available in 2 weeks Salary on request
Enquire
#HIRED Lead Recently hired

Senior Scala Backend Engineer

Switzerland
7 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 ZIO gRPC Redis Kubernetes Terraform PostgreSQL Docker
Hired Salary: $XXX,XXX
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KK-5038 Lead

Senior Backend Engineer

Netherlands
18 years
Flexible
Employee / Freelancer

Led the development of a distributed event-driven architecture using Akka for a high-frequency trading platform, optimizing latency to sub-millisecond levels. Developed and deployed a real-time analytics pipeline with Kafka, processing millions of events per second for a large-scale e-commerce platform. Spearheaded the migration of legacy systems to functional programming paradigms, significantly improving code maintainability and performance.

  • Architected microservices for scalable financial transaction systems
  • Implemented machine learning models for fraud detection in Scala
  • Designed RESTful APIs supporting thousands of concurrent users
  • Optimized JVM performance for large-scale data processing tasks
Scala Java Python Functional Programming Akka Kafka
Available in 2 weeks €70k-85k/yr
Enquire
SQ-6135 Principal

Principal Software Engineer

Switzerland
19 years
Hybrid
Employee / Freelancer

Architected a distributed microservices platform for real-time financial data processing, optimizing latency and throughput across cloud environments. Spearheaded the development of a fault-tolerant messaging system, ensuring data consistency and availability in a multi-region setup. Led the integration of functional programming paradigms to enhance code maintainability and scalability in large-scale enterprise applications.

  • Designed scalable cloud infrastructure for high-volume transaction systems
  • Implemented consensus protocols for distributed ledger technologies
  • Optimized JVM performance for low-latency trading applications
  • Pioneered use of Scala in data stream processing pipelines
Functional Programming Distributed Systems Microservices Cloud Platforms Scala
Available in 2 months €200k-220k/yr
Enquire
AH-8221 Lead

Senior Scala Developer

Poland
8 years
Remote
Employee

Architected a distributed ledger system using Akka and ZIO, ensuring high availability and fault tolerance. Led a team in developing a scalable API gateway leveraging Tapir and Cats Effect for a fintech application.

  • Optimized database interactions with Doobie
  • Designed a reactive event-driven system
  • Integrated third-party services using Scala
Scala ZIO Akka Cats Effect Tapir Doobie
Interviewing now €72k-85k/yr
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LP-4770 Principal

Big Data Solutions Architect / Tech Lead

France
20 years
Remote
Employee

Designed and implemented a petabyte-scale data processing platform using distributed systems technologies. Spearheaded the development of a real-time streaming analytics solution for IoT data ingestion.

  • Architected a multi-tenant data platform
  • Led a team in building a batch processing system
  • Implemented a fault-tolerant message queue
Distributed Systems Data Platform Architecture Technical Leadership System Design Data Processing Streaming Systems
Available in 1 month Salary on request
Enquire
GD-3884 Principal

Senior Software Engineer

Canada
12 years
Remote
Employee / Freelancer

Designed and implemented distributed systems for high-frequency trading platforms, focusing on low-latency data processing. Spearheaded the integration of domain-driven design principles into microservices architecture, enhancing scalability and maintainability. Developed a real-time analytics engine processing millions of events per second using functional programming techniques.

  • Optimized JVM performance for large-scale financial applications
  • Led migration from monolithic to microservices architecture
  • Implemented event sourcing for complex transaction processing
Scala Java Functional Programming OOP DDD TDD
Available in 2 weeks Salary on request
Enquire
SS-9357 Mid-level

Développeuse Backend Scala

France
4 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 $60k-60k/yr
Enquire
ST-6011 Principal

Senior Backend Engineer

Germany
13 years
Remote
Employee

Engineered backend systems with Go and Scala, focusing on real-time data processing. Developed scalable search solutions with Elasticsearch in distributed environments.

  • Engineered real-time data systems
  • Developed Elasticsearch search solutions
  • Optimized Go-based backend services
Go Node.js Elasticsearch Scala Python Kubernetes
Available in 3+ months Salary on request
Enquire
JH-6372 Senior

Senior Software Engineer

Uzbekistan
3 years
Flexible
Employee

Built cloud-native applications using Java and Spring on AWS. Designed containerized applications with Kubernetes for scalable deployment. Developed systems with a focus on reliability and maintainability.

  • Built cloud-native applications on AWS
  • Designed containerized apps with Kubernetes
  • Focused on system reliability
Java Spring Scala JavaScript AWS Lambda CloudWatch
Interviewing now $80k-95k/yr
Enquire
AH-3623 Senior

Software Engineer

Germany
6 years
Flexible
Employee

Engineered a scalable event-driven architecture for an e-commerce application using Akka and ZIO, enhancing system resilience and fault tolerance. Developed backend services in Scala to support high-volume transaction processing, ensuring data consistency and reliability. Contributed to the design of a domain-specific language for internal tools, improving developer productivity.

  • Integrated NoSQL databases with existing Java applications
  • Built reactive systems using Play Framework and WebSockets
  • Enhanced performance of JVM-based applications with Kotlin
  • Conducted load testing, achieving 99.9% uptime during peak
Scala Java ZIO Akka Akka HTTP Akka Streams
Interviewing now $60k-80k/yr
Enquire
SV-8028 Mid-level

Scala Backend Engineer

Poland
4 years
Remote
Employee / Freelancer

Developed scalable backend systems utilizing Scala for real-time data processing in fintech applications. Optimized SQL queries for high-throughput transaction processing, achieving significant performance improvements.

  • Implemented microservices architecture using Kotlin and Scala
  • Integrated Cats Effect for asynchronous data processing
  • Built Python scripts for data pipeline automation
Scala SQL Kotlin Python Cats Cats Effect
Available in 1 month Salary on request
Enquire
JJ-2880 Senior

Senior Backend Engineer

Portugal
7 years
Remote
Employee / Freelancer

Developed backend systems with Rust and Go for high-performance computing. Expert in implementing cross-platform solutions with C++ and Python.

  • Built high-performance systems with Rust
  • Developed cross-platform solutions
  • Optimized C++ and Python applications
Rust Scala Go Java Python C++
Available in 2 weeks Salary on request
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LR-7612 Lead

Sr. Software Engineer

United States
10 years
Remote
Employee / Freelancer

Designed full-stack applications with Go, Python, and Rust. Expert in building scalable backend systems and integrating TypeScript for frontend solutions.

  • Built full-stack applications
  • Integrated TypeScript in projects
  • Optimized Rust backend systems
Go Python Rust Scala JavaScript TypeScript
Interviewing now $130k-150k/yr
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