Senior Go Developer (AdTech)

SigmaSoftware2

Bucharest, Bucharest, Romania Remote permanent

Posted: February 19, 2026

Required Skills

Job Description

We are looking for a Senior Go Developer to join our dynamic team and work on cutting-edge AdTech solutions. This role offers the opportunity to experiment with AI, LLMs, and emerging technologies while solving complex challenges in large-scale data processing. 

CUSTOMER

Our customer is a global leader in contextual advertising with more than 500 employees worldwide. They specialize in delivering highly relevant ads by leveraging AI, real-time technology, and large-scale data processing. Operating in the AdTech industry, they are recognized for innovation in Connected TV (CTV) advertising. The team you will join works with the agility of a startup while benefiting from the resources of a global organization.

PROJECT

You will contribute to the development of a smart advertising platform that processes terabytes of data to understand audiences and deliver precise, contextual ads. The platform combines AI, LLMs, and emerging technologies to push the boundaries of CTV advertising. In this role, you will own innovation end-to-end — from research and prototyping to delivering production-ready solutions.

• Design, develop, and maintain high-performance backend services using Go 
• Participate in architecture design and technical decision-making
• Build and improve solutions for contextual targeting and audience understanding
• Experiment with AI, LLMs, and emerging technologies to support product innovation
• Develop and optimize workflows and data pipelines for large-scale processing
• Collaborate with product managers and team members to define requirements and user stories
• Translate business needs into scalable and reliable technical solutions
• Prototype new ideas and evolve them into production-ready systems
• Monitor, troubleshoot, and improve system performance and stability

• 5+ years of hands-on experience using Golang
• Strong experience with system architecture, deployment, and monitoring
• Hands-on experience working with large-scale data workflows
• Solid understanding of scalability, performance, and reliability principles
• Familiarity with the RTB / CTV advertising ecosystem
• Ability to translate business requirements into robust technical solutions
• Strong analytical and problem-solving skills
• Ability to manage multiple priorities and meet deadlines
• Good communication and collaboration skills
• At least a Bachelor’s degree in Computer Science, Engineering, or a related field
• Upper-Intermediate or higher English level

WOULD BE A PLUS

• Experience in AdTech or contextual advertising
• Knowledge of real-time streaming systems
• Experience with microservices and distributed systems
• Hands-on work with high-throughput data pipelines
• Experience with Python or Node.js / JavaScript

PERSONAL PROFILE

• Proactive problem solver who thrives in fast-paced environments
• Passion for experimenting with emerging technologies
• Strong sense of ownership and accountability
• Team-oriented with open communication style
• Continuous learner with a drive for self-improvement

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