Lead/Principal Go Developer

About the Position

Lead/Principal Go Developer (AdTech)

Join Sigma Software as a Lead/Principal Go Developer to design a high-load, low-latency real-time bidding platform for programmatic advertising. This is a Principal Senior Remote position based in Europe (Poland, Romania, Ukraine).

Responsibilities

• Design and implement core Back-End services for real-time bidding, optimization, and ad delivery workflows
• Build custom bidding agents for real-time bid decisioning
• Develop high-load, low-latency components supporting real-time auction and delivery mechanics
• Implement proprietary pacing, bid-shading, and optimization logic to improve campaign efficiency
• Design and integrate forecasting capabilities for impressions, reach, outcomes estimation, and campaign planning
• Work with OpenRTB, JSON, protobuf, and other ad-tech protocols and data formats
• Integrate with data and metrics pipelines to support real-time optimization and reporting
• Implement observability, monitoring, and troubleshooting capabilities (LGTM/ELK stack)
• Collaborate with product, engineering, data, and ad operations stakeholders to deliver scalable performance advertising capabilities

Requirements

• At least 7 years of relevant experience as a Back-End Developer in commercial projects
• Strong production experience with Golang
• Experience designing and building high-load, low-latency distributed systems
• Hands-on experience with JSON-based integrations, protobuf or similar protocols
• Experience with low-latency data stores and caching technologies such as Aerospike, Redis, ElastiCache or similar
• Experience with PostgreSQL or similar relational databases
• Experience building production-grade services with strong reliability, scalability, and observability requirements
• Ability to work independently, reason through complex system trade-offs, and contribute to architecture decisions
• At least an Upper-Intermediate level of English

Nice to Have

• Understanding of real-time bidding systems, auction mechanics, and AdTech domain
• Understanding of pacing, bid optimization, forecasting, or performance advertising delivery mechanics
• Experience working on DSP, SSP, Ad Exchange, ad server, or performance marketing platforms
• Experience with integration of LGTM/ELK or similar observability stacks

Personal Profile

• Analytical mindset with strong problem-solving skills
• Ability to work in fast-paced environments
• Excellent communication skills for cross-team collaboration
• Self-motivated and proactive approach to work
• Strong attention to detail and commitment to quality

We Offer

• Competitive benefits
• Flexible working arrangements
• Opportunities to work on challenging projects that push the boundaries of technology
• Diversity of Domains & Businesses
• Variety of technology
• Health & Legal support
• Active professional community
• Continuous education and growing
• Flexible schedule
• Remote work
• Outstanding offices (if you choose it)
• Sports and community activities

About the Company

At Sigma Software, we deliver innovative, scalable solutions that empower industries and drive measurable results. You will work alongside talented professionals in a culture that values expertise, collaboration, and continuous growth.

Our customer is a globally recognized technology-driven company operating in the digital advertising space. They specialize in delivering scalable, high-performance solutions that empower advertisers to optimize campaigns in real time. With a strong culture of innovation and excellence, they are committed to building platforms that shape the future of programmatic advertising.

The project is a strategic self-service advertising solution designed to make streaming inventory more accessible, measurable, and performance-driven for advertisers of all sizes. It includes a real-time bidding and optimization platform capable of handling high-load, low-latency auction mechanics. The system integrates forecasting.