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# Senior Software Engineer

- **Company:** Cint
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), .NET Framework, Test Suite, Artificial Intelligence, Programming Tools, ReactJS, Grafana, Technical Debt, Backend, Event Driven Architecture, Legacy Systems
- **Published:** August 1, 2026
- **Apply:** https://www.buscojobs.com.es/senior-software-engineer-en-barcelona-ID-364121381

## About the Role

li libDrive AI Efficiency /b: Leverage Agentic programming tools (like Claude Code) to accelerate refactoring and development workflows, focusing on complex problems.
/li /ul h3Who You Are /h3 ul libFullstack-Minded Backend Expert /b: You have deep experience in backend systems and feel comfortable switching between languages.
You also have practical expertise in React.
/li libCollaborative Team Player /b: You have a strong collaboration mindset, actively mentor others and share knowledge across the team.
/li libSystems Thinker /b: You are comfortable with event-driven systems and have a proven track record of breaking down monoliths and managing system migrations.
/li libQuality Obsessed /b: You believe that code without a robust test suite (Unit, Integration, E2E) isn't finished.
/li libPragmatic Curious /b: You have a strong product mindset.
You don't just take tickets; you seek to understand the business impact of your architectural choices.

## Description

ppCint is a pioneer in research technology (ResTech).Our customers use the Cint platform to post questions and get answers from real people to build business strategies, confidently publish research, accurately measure the impact of digital advertising, and more.The Cint platform is built on a programmatic marketplace, the world's largest, with nearly 300 million respondents in over 150 countries who consent to sharing their opinions, motivations, and behaviours.We are feeding the world's curiosity./p h3Job Description /h3 h3The Role /h3 pAs a Senior Software Engineer in our Supply domain, you will be architecting the future of our platform.In ****, our primary mission is foundational modernization, leading the charge in modernizing our architecture by transitioning from legacy systems and moving our ecosystem from GO toward a unified Java/Spring stack./p h3The Team /h3 pThe Supply domain is composed of talented engineers distributed in multiple countries across Europe and the US.We build the critical infrastructure that manages and standardizes the flow of survey data to our global network of suppliers./p h3What You'll Do /h3 ul libCollaborate on this modernization journey /b: Design and implement patterns for legacy displacement to move domains out of our monolith with zero downtime./li libBridge Tech Stacks /b: Build new services and help transition others from .NET to Spring while navigating and contributing to other codebases./li libProduct Collaboration /b: Partner with product managers to question and form requirements, understand the "Why", and help shape a roadmap that balances technical debt with new value./li libGlobal Collaboration /b: Communicate effectively across timezones.Your written documentation and async communication will be the glue for our distributed team./li libMaster Observability /b: Use Grafana and modern tracing to monitor system health, ensuring our backend-heavy domain remains performant and reliable./li libDrive AI Efficiency /b: Leverage Agentic programming tools (like Claude Code) to accelerate refactoring and development workflows, focusing on complex problems./li /ul h3Who You Are /h3 ul libFullstack-Minded Backend Expert /b: You have deep experience in backend systems and feel comfortable switching between languages.You also have practical expertise in React./li libCollaborative Team Player /b: You have a strong collaboration mindset, actively mentor others and share knowledge across the team./li libSystems Thinker /b: You are comfortable with event-driven systems and have a proven track record of breaking down monoliths and managing system migrations./li libQuality Obsessed /b: You believe that code without a robust test suite (Unit, Integration, E2E) isn't finished./li libPragmatic Curious /b: You have a strong product mindset.You don't just take tickets; you seek to understand the business impact of your architectural choices./li libObservability Advocate /b: You build systems that proactively reveal performance, rather than waiting for crashes./li /ul h3Working at Cint /h3 ul libRemote-First /b: Work from anywhere where Cint operates with a setup that supports your best work./li libHigh Autonomy /b: We trust our engineers to make sound decisions and own their work end to end./li libGlobal Impact /b: Your work powers a marketplace used by millions of people worldwide./li /ul /p #J-*****-Ljbffr


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