Senior Backend Software Engineer - RUBY

Coberon Chronos; España; On-site; EUR 60,000 - 80,000; Full time

Job summary

A leading B2B software company is looking for exceptional Senior Backend Software Engineers to develop complex applications. Ideal candidates should have strong experience in scalable backend systems, proficiency in Ruby and GOlang, and be ready to work with remote teams globally. Full-time, permanent positions with competitive compensation and benefits are available.

Qualifications

• 5+ years of experience in distributed backend applications.
• Ability to work remotely with global teams.
• 7+ years industry experience in related fields.

Responsibilities

• Build and troubleshoot Ruby and GOlang applications.
• Integrate data storage solutions.
• Contribute to all phases of the development lifecycle.

Skills

Building scalable distributed backend applications

Understanding of web applications

Networking protocols

Database technologies

Debugging and problem-solving skills

Multilingual programming

Education

BS/MS in Computer Science or related

Tools

Ruby

GOlang

Docker

PostgreSQL

Kafka

Job description

Our client is a world‑class American B2B software company, a leader in its field. We are looking for exceptional Senior Backend Software Engineers (Tech stack: Ruby/ RoR, PostgreSQL, Redis, Kafka, k8s) to join the team that develops and maintains everything related to recipe execution: DSL, pulling events, processing webhooks, and executing jobs. It has various aspects: performance, scaling, storage, durability, atomicity, concurrency guarantees, data protection, and encryption.

These are full‑time, permanent positions offering highly competitive compensation and benefits.

MUST‑HAVE REQUIREMENTS

• Strong experience in building scalable distributed backend applications (5+ years).
• Great understanding of all building blocks of large web applications: databases, load balancers, application servers, message brokers, caching, monitoring, etc.
• Good understanding of network protocols and stacks.
• Good understanding of DB technologies: classic databases and modern no‑SQL.
• Knowledge of basic data structures and algorithms and how they are used is a must.
• Multilingual programming experience: our code base is primarily in Ruby, with a trend to migrate to GOlang and Rust.
• Excellent debugging, analytical, problem‑solving, and social skills.
• BS/MS degree in Computer Science, Engineering, or a related subject, 7+ years of industry experience.
• Readiness to work remotely with teams distributed across the world and time zones occasionally.

ADVANTAGE IF YOU HAVE

• Background in GOlang and/or Rust.
• Background in network programming.
• Background in applications and data security.
• Deep knowledge of physical DB design.
• Experience working with Docker and other isolation technologies.
• Experience working with public cloud infrastructure providers such as AWS/Azure/Google Cloud.
• Experience in related fields (DevOps, ML, DBA, Enterprise applications, etc.).
• Experience in building/deploying data processing pipelines is a plus.
• Experience working with third‑party REST APIs at scale (request throttling, batch processing, etc.).

RESPONSIBILITIES

• Build/extend/troubleshoot/fix complex heterogeneous GOlang and Ruby applications, as well as small self‑contained GOlang microservices.
• Improve execution engine of custom third‑party code (Ruby DSL, isolation, performance, new features).
• Write well‑designed, testable, efficient code in Ruby and GOlang.
• Integration of data storage solutions.
• Postgres/S3/DynamoDB/Kafka/ClickHouse, etc.
• Contribute to all phases of the development lifecycle.
• Provide code reviews to your teammates.
• Evaluate and propose improvements to the existing system.
• Identify bottlenecks and bugs, and devise solutions to these problems.
• Help maintain code quality, organization, and automatization.
• You can anticipate working with Rust and Wasm in the future.