Cint

Tech / AI / Software

SeniorSoftwareEngineer

barcelona, catalonia, spain FULL TIME Remote Friendly
Market Sentiment
HIGH DEMAND

Neural analysis suggests this role is
optimal for mid candidates.

The Brief

“Senior Software Engineer at Cint. Skills: architecting the future of our platform, foundational modernization, legacy displacement, transitioning our ecosystem, build new services, transition others from. NET to Spring, Master Observability, Drive AI Efficiency, Fullstack-Minded Backend Expert, Systems Thinker, Quality Obsessed, Observability Advocate. architecting the future of our platform. foundational modernization”

Industry & Context.

Tech / AI / Software
Problems you'll solve

deal with obvious problems and focus on the complex ones; Systems Thinker; breaking down monoliths and managing system migrations

What They're Looking For.

Must Have

deep experience in backend systems, comfortable switching between languages, proven track record of breaking down monoliths and managing system migrations, code without a robust test suite (Unit, Integration, E2E) isn't finished, build systems that tell you how they're performing

Nice to Have

practical expertise in React, collaboration mindset, product mindset, curious

What You'll Do.

architecting the future of our platform

foundational modernization

leading the charge in modernizing our shifting from legacy systems and transitioning our ecosystem from GO toward a unified Java/Spring stack

Design and implement patterns for legacy displacement to move domains out of our monolith with zero downtime

Build new services and help transition others from. NET to Spring while navigating and contributing to other codebases

Partner with product managers to question and form requirements

and help shape a roadmap that balances technical debt with new value

Communicate effectively across timezones

Use Grafana and modern tracing to monitor system health

ensuring our backend-heavy domain remains performant and reliable

Leverage Agentic programming tools (like Claude Code) to accelerate refactoring and development workflows

Use it to deal with obvious problems and focus on the complex ones

How You'll Work.

Team & Collaboration

Collaborate on this modernization journey; Product Collaboration; Global Collaboration; Communicate effectively across timezones; Your written documentation and async communication will be the glue for our distributed team; Collaborative Team Player; collaboration mindset; believe that success happens together; actively seek to mentor others and share knowledge across the team; Collaboration is our superpower; We uncover rich perspectives across the world; Success happens together; We deliver across borders

Communication Scope

Communicate effectively across timezones; Your written documentation and async communication will be the glue for our distributed team

Process & Methodology

help shape a roadmap that balances technical debt with new value

Full Job Description

Who We Are Cint 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, which is 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! The Role As a Senior Software Engineer in our Supply domain, you won't just be writing features; you will be architecting the future of our platform. In 2026, our primary mission is foundational modernization. We are leading the charge in modernizing our architecture; shifting from legacy systems and transitioning our ecosystem from GO toward a unified Java/Spring stack. The Team The 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. We believe in strong collaboration and team work, high quality engineering, and providing the best possible experience for our customers. What You’ll Do * Collaborate on this modernization journey : Design and implement patterns for legacy displacement to move domains out of our monolith with zero downtime. * Bridge Tech Stacks : Build new services and help transition others from .NET to Spring while navigating and contributing to other codebases. * Product Collaboration : Partner with product managers to question and form requirements, understand the "Why", and help shape a roadmap that balances technical debt with new value. * Global Collaboration : Communicate effectively across timezones. Your written documentation and async communication will be the glue for our distributed team. * Master Observability : Use Grafana and modern tracing

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