Senior Full-Stack Software Engineer

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. Build and maintain backend services, APIs, and integrations, ensuring reliability, performance, and data integrity.

Posted 11/7/2026full-timeAthens • GreeceSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in building and maintaining production applications with a strong focus on backend development, API design, and database management. Proficient in collaborating across teams to deliver features and improve processes while utilizing AI tools for code validation and enhancement.

Highest-signal resume keywords

Ruby On RailsReactAPI DesignPostgreSQLAI Coding Tools

ATS Keywords

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Hard Skills

Backend DevelopmentFrontend DevelopmentSQLDebuggingCode ReviewRefactoringAutomated TestingRelational DatabasesProduction MonitoringFeature Delivery

Soft Skills

Ownership MindsetCollaborationCommunication

Tools & Technologies

ElasticsearchSidekiqMinitestPlaywrightGit

Tech Stack

Tools & technologies

ElasticSearchPostgresReactRubyRuby on RailsSQL

About the role

Key responsibilities & impact

Build and maintain backend services, APIs, and integrations, ensuring reliability, performance, and data integrity.
Deliver features across the stack, contributing to the frontend using existing components and patterns.
Collaborate with Product Managers, designers, and engineers to shape solutions and make technical trade-offs.
Own testing, release, production monitoring, and follow-up improvements for delivered features.
Improve the codebase through refactoring and code reviews, and improve team processes and development practices.
Use AI tools effectively, applying engineering judgment to validate generated code for correctness, security, and maintainability.
Own features end to end, from shaping solutions through release and measuring impact on users.

Requirements

What you’ll need

6+ years of experience building and maintaining production applications, with strong backend expertise.
Experience with Ruby on Rails or another modern backend framework, and willingness to work with Rails.
Practical experience with React or another modern frontend framework, and willingness to contribute across the stack.
Strong knowledge of API design, relational databases, and SQL, with experience using PostgreSQL or a comparable database.
Familiarity with search engines, background job processing, and automated testing, including Elasticsearch, Sidekiq, Minitest, and Playwright.
Ability to understand and extend existing codebases, with solid practices in debugging, maintainability, and Git.
Strong ownership mindset: independently drive work to completion, communicate progress and risks, and improve how the team works.
Experience using AI coding tools, with the ability to critically evaluate their output and make sound engineering decisions.

Benefits

Comp & perks

Vibrant and fresh work environment
Flexible work-from-home policy
The tools you need to perform your daily tasks successfully
L&D personal budget
Private Insurance Plan
+4 extra PTO days annually
The unique opportunity to join “the next big thing” at ground level