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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
301+
Verified Candidates
14+
Avg. Years Experience
Top Skills
Scala Kafka 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

NP-9742 Senior Recently added

Senior Go Backend Developer

France
8 years
Remote
Employee / Freelancer

Designed and implemented robust backend services for large-scale e-commerce platforms. Developed API gateways to streamline service communication and enhance system reliability. Optimized PostgreSQL databases for high-volume transaction processing.

  • Deployed containerized applications using Kubernetes for seamless scalability.
  • Integrated third-party payment solutions via secure API protocols.
  • Automated CI/CD pipelines to accelerate deployment cycles.
Go Golang Backend Services APIs PostgreSQL Kubernetes
Available in 2 weeks Salary on request
Enquire
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
#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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KW-3297 Principal

Backend Engineer

United States
22 years
Remote
Freelancer

Designed and implemented a distributed ledger system for financial transactions, optimizing consensus protocols for latency and throughput. Spearheaded the development of a real-time event processing pipeline, handling billions of messages per day with sub-second latency. Architected a microservices platform for a large-scale e-commerce application, focusing on scalability and fault tolerance.

  • Developed a custom RPC framework in Rust for microservices
  • Optimized JVM performance for high-frequency trading applications
  • Implemented a distributed caching system, reducing data retrieval time by 70%
  • Led migration of monolithic architecture to microservices, improving deployment speed
Java Rust Scala Distributed systems Microservices Event-driven architecture
Interviewing now $165-165/hr
Enquire
SB-3635 Lead

Sr. Backend Software Engineer

India
9 years
Flexible
Employee / Freelancer

Developed high-throughput distributed systems in Rust and Scala, focusing on real-time data processing. Built scalable microservices architecture leveraging Actix Web and Tokio for concurrent processing. Extensive experience in performance optimization for low-latency applications.

  • Designed scalable microservices with Actix Web
  • Optimized low-latency systems using Rust
  • Implemented real-time data processing pipelines
Scala Functional Programming Microservices RESTful APIs Kafka FS2
Interviewing now Salary on request
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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
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
EL-6427 Principal

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
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
Enquire
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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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 €143-158/hr
Enquire
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
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
JF-3412 Senior

Founding Scala Software Engineer

France
7 years
Employee / Freelancer

Co-founded a startup focusing on distributed systems and microservices with Scala. Designed APIs for scalable data-driven applications. Integrated complex SQL queries for data-intensive backend processes.

  • Co-founded startup in distributed systems
  • Designed scalable APIs
  • Integrated complex SQL queries
Python Scala SQL API Design Microservices Distributed Systems
Salary on request
Enquire

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