Hire
Backend Scala Developers

Trusted by leading Scala companies
Coralogix
ZF
Riskified
Hypervolt
Paidy
Tiko
Writer
Commercetools
Ledger
CNH
SiriusXM
Leonteq
Arteris
ITV
Linklaters
ClearScore
Guardian
VakantieDiscounter
IOHK
392+
Verified Candidates
12+
Avg. Years Experience
Top Skills
Scala Kubernetes PostgreSQL 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

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
NN-2502 Senior Recently added

Senior Software Engineer

United Kingdom
7 years
Flexible
Employee / Freelancer

Developed scalable microservices for real-time financial transaction processing, leveraging event-driven architecture to ensure low-latency data handling. Designed and implemented distributed systems for high-availability cloud environments, focusing on fault tolerance and resilience.

  • Architected RESTful APIs for cross-platform data integration
  • Optimized distributed system performance for 100,000+ concurrent users
  • Implemented message-driven microservices using Kafka and Akka
  • Designed scalable data pipelines for real-time analytics
Distributed systems Microservices Event-driven architecture System design API design Scala
Interviewing now 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
See More
KW-3297 Principal

Senior 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
Rust Java Scala Apache Kafka gRPC TIBCO
Interviewing now $100-100/hr
Enquire
ZK-8186 Principal

CTO, CO-FOUNDER

Finland
25 years
Flexible
Employee / Freelancer

Architected a large-scale multiplayer game engine supporting millions of concurrent users, leveraging deep expertise in Linux kernel optimizations and C++. Pioneered the development of a cloud-native platform, enhancing scalability and reliability for distributed systems. Spearheaded the integration of Rust in performance-critical components, reducing latency and increasing throughput.

  • Designed real-time physics engine for AAA games
  • Implemented secure, low-latency networking protocols
  • Optimized cloud cost with efficient resource allocation
Linux kernel game development cloud infrastructure product management Rust C++
Interviewing now €90k-120k/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
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
Enquire
SA-6380 Senior

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
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
Enquire
ZA-1638 Senior

Technical Lead

Austria
8 years
Flexible
Employee

Built production Rust services for high-throughput processing of structured and unstructured data using Apache DataFusion, alongside integration APIs querying relational, graph, and vector databases. Delivered performance-critical pipelines with Argo Workflows, covering deployment, observability, and production monitoring.

  • Async service development with Tokio
  • Functional programming for distributed backend systems
  • Rust adoption for reliability-sensitive components
  • Cloud-native service lifecycle ownership
Rust Apache DataFusion Tokio Cargo Scala Python
Available in 2 months 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
Enquire
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
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
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
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

Ready to hire Scala developers?

Start Hiring

Explore More