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# Lead/Principal Go Developer (Adtech)

- **Company:** Sigma Software
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Data Stores, Relational Databases, Distributed Systems, Protocol Buffers, JSON, PostgreSQL, Redis, Systems Integration, Aerospike, Amazon ElastiCache, Caching, Backend, Low Latency, Elk Stack, Golang
- **Published:** August 5, 2026
- **Apply:** https://www.buscojobs.com.es/lead-principal-go-developer-adtech-en-madrid-ID-365560095

## About the Role

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
WILL BE A PLUS
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
Additional Information
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
#J-*****-Ljbffr

## Description

Are you ready to take on a high-impact role in building cutting-edge advertising technology?We are looking for aLead/Principal Go Developer to join our team and design a high-load, low-latency real-time bidding platform.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.Why join us?We offer competitive benefits, flexible working arrangements, and opportunities to work on challenging projects that push the boundaries of technology.CUSTOMEROur 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.PROJECTThe 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.Job DescriptionDesign and implement core Back-End services for real-time bidding, optimization, and ad delivery workflowsBuild custom bidding agents for real-time bid decisioningDevelop high-load, low-latency components supporting real-time auction and delivery mechanicsImplement proprietary pacing, bid-shading, and optimization logic to improve campaign efficiencyDesign and integrate forecasting capabilities for impressions, reach, outcomes estimation, and campaign planningWork with OpenRTB, JSON, protobuf, and other ad-tech protocols and data formatsIntegrate with data and metrics pipelines to support real-time optimization and reportingImplement observability, monitoring, and troubleshooting capabilities (LGTM/ELK stack)Collaborate with product, engineering, data, and ad operations stakeholders to deliver scalable performance advertising capabilitiesQualificationsAt least 7 years of relevant experience as a Back-End Developer in commercial projectsStrong production experience with GolangExperience designing and building high-load, low-latency distributed systemsHands-on experience with JSON-based integrations, protobuf or similar protocolsExperience with low-latency data stores and caching technologies such as Aerospike, Redis, ElastiCache or similarExperience with PostgreSQL or similar relational databasesExperience building production-grade services with strong reliability, scalability and observability requirementsAbility to work independently, reason through complex system trade-offs and contribute to architecture decisionsAt least an Upper-Intermediate level of EnglishWILL BE A PLUSUnderstanding of real-time bidding systems, auction mechanics and AdTech domainUnderstanding of pacing, bid optimization, forecasting or performance advertising delivery mechanicsExperience working on DSP, SSP, Ad Exchange, ad server or performance marketing platformsExperience with integration of LGTM/ELK or similar observability stacksAdditional InformationPERSONAL PROFILEAnalytical mindset with strong problem-solving skillsAbility to work in fast-paced environmentsExcellent communication skills for cross-team collaborationSelf-motivated and proactive approach to workStrong attention to detail and commitment to quality#J-*****-Ljbffr


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