Senior Software Engineer

Seedtag; Barcelona; Hybrid; EUR 70,000 - 110,000; Full time

Benefits offered by this job

a home office budget

paid trips to HQ in Madrid

a MacBook Pro M3

continuous learning opportunities

a supportive culture

Job summary

Seedtag is hiring a Senior Software Engineer to build backend systems for neuro-contextual advertising at scale in Barcelona. The role focuses on designing high-throughput services and integrating AI/ML models within a distributed cloud environment.

You will work with Data Scientists, AI teams, and Product Managers to deliver scalable API endpoints and robust data pipelines, enabling contextual data applications across OpenWeb, CTV, and in-app ecosystems.

Qualifications

• Strong Golang experience.
• Knowledge of distributed systems.
• Experience with AI technologies.
• Familiarity with cloud infrastructure, observability, and Infrastructure as Code.
• Experience with Python, Node.js, TypeScript; AdTech (RTB, OpenRTB, CTV) is a plus.

Responsibilities

• Design and maintain high-throughput, low-latency backend services in Golang.
• Integrate AI/ML models including LLM APIs into systems.
• Develop scalable APIs and data pipelines for contextual data across multiple environments.
• Collaborate with Data Scientists, AI teams, and Product Managers to deliver impactful solutions.

Job description

Role Description

Seedtag is hiring a Senior Software Engineer to build backend systems for neuro-contextual advertising at scale.

Responsibilities

The role involves designing and maintaining high-throughput, low-latency services in Golang, integrating AI and ML models including LLM APIs, and developing scalable APIs and data pipelines for contextual data across OpenWeb, Connected TV, and in-app environments. The engineer will collaborate with Data Scientists, AI teams, and Product Managers to deliver impactful solutions.

Required Skills

Required skills include strong Golang experience, knowledge of distributed systems, AI technologies, cloud infrastructure, observability, and Infrastructure as Code. Experience with Python, Node.js, TypeScript, and AdTech (RTB, OpenRTB, CTV) is a plus.

Benefits

• a home office budget
• paid trips to HQ in Madrid
• a MacBook Pro M3
• continuous learning opportunities
• a supportive culture

flexible remote or hybrid work options with contracts available in multiple European countries.