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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
375+
Verified Candidates
12+
Avg. Years Experience
Top Skills
Scala AWS Docker PostgreSQL
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

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
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KW-3297 Principal Recently added

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 $150-150/hr
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#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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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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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
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WK-9239 Principal

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
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AF-2531 Lead

Senior Scala Engineer

Italy
15 years
Remote
Employee / Freelancer

Led the development of a high-performance trading platform using Scala and ZIO, optimizing execution speed and reliability. Spearheaded the migration of legacy systems to modern, functional programming paradigms to enhance maintainability and scalability.

  • Integrated Java and Scala codebases for seamless interoperability
  • Developed custom concurrency models in ZIO for reactive systems
  • Enhanced C++ systems for real-time data processing
  • Built complex data transformation pipelines in financial domain
Scala Java C++ C# JavaScript ZIO
Available in 1 month Salary on request
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JA-5752 Senior

Senior Software Engineer

Poland
6 years
Flexible
Employee / Freelancer

Developed high-throughput microservices for financial transaction processing, leveraging Akka for distributed systems. Built a real-time analytics platform using Scala and functional programming paradigms, optimizing data pipelines for low-latency performance. Contributed to the design of a domain-specific language for data transformation tasks, enhancing data manipulation capabilities.

  • Implemented reactive systems with Akka and Cats for scalability.
  • Optimized microservices architecture for concurrent data processing.
  • Designed fault-tolerant systems handling millions of requests daily.
  • Integrated functional programming concepts to improve code maintainability.
Scala Akka Cats Microservices OOP FP
Available in 1 month $85k-100k/yr
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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
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LP-4770 Principal

Senior Software Engineer & Distributed Systems

France
20 years
Remote
Employee / Freelancer

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
Backend development Systems Programming Rust Go Scala API Design
Interviewing now €90k-110k/yr
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LK-4608 Senior

Systems Engineer

India
5 years
Remote
Employee / Freelancer

Engineered distributed systems for cloud-native applications, focusing on reliability and scalability using Go and Scala. Enhanced a large-scale data ingestion system with SQL optimizations, improving throughput for a logistics platform. Developed cross-language interoperability features in a multi-language runtime environment.

  • Implemented RESTful APIs with Gin and Play Framework
  • Automated deployment pipelines for continuous integration
  • Designed fault-tolerant messaging systems with Kafka
Go Scala Java SQL Gin Play Framework
Available in 1 month $60k-75k/yr
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AA-3913 Senior

Senior Backend Engineer

Ukraine
5 years
Remote
Employee / Freelancer

Developed a high-throughput distributed event processing system utilizing Scala and Kafka, handling millions of events per second. Spearheaded the implementation of a scalable microservices architecture for a large e-commerce platform, optimizing performance with PostgreSQL and Redis. Engineered a real-time analytics pipeline for financial data streams, leveraging RocksDB for low-latency data retrieval.

  • Built a custom caching layer with Redis for sub-millisecond responses.
  • Implemented fault-tolerant services with Akka for seamless recovery.
  • Optimized complex data transformations in a Python-Scala hybrid environment.
  • Designed a robust CI/CD pipeline for microservices deployment.
Scala Java Python PostgreSQL Redis RocksDB
Interviewing now $60k-80k/yr
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NZ-3031 Principal

Senior Scala Developer

Netherlands
20 years
Remote
Freelancer

Architected distributed systems with Scala and Kafka, achieving high throughput and fault tolerance. Built containerized applications orchestrated with Kubernetes, enhancing deployment efficiency across cloud environments. Designed infrastructure as code using Terraform, streamlining resource provisioning and management.

  • Implemented event-driven architectures with ZIO.
  • Migrated legacy systems to cloud-native microservices.
  • Developed custom middleware solutions for data streaming pipelines.
Scala ZIO Kafka Kubernetes Terraform Java
Available in 2 months $150-188/hr
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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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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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