Principal/Senior Backend Engineer

Sigma Software Group

Principal/Senior Backend Engineer building a high-load, low-latency bidding platform for digital advertising. Collaborating with a global team and designing core backend services.

Posted 6/19/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Tech Stack

Tools & technologies

Distributed SystemsGoPostgresRedis

About the role

Key responsibilities & impact

Design and implement core backend 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

What you’ll need

5+ years of relevant experience as a Backend Engineer in commercial projects
Strong backend engineering experience with C++ or 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 (Aerospike, Redis, ElastiCache, etc.)
Experience with PostgreSQL or similar relational databases
Proven track record of 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
Upper-Intermediate English level

Benefits

Comp & perks

Competitive benefits
Flexible working arrangements
Opportunities to work on challenging projects

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

C++Golangbackend engineeringhigh-load systemslow-latency systemsJSONprotobufPostgreSQLAerospikeRedis

Soft Skills

independent workcomplex problem solvingarchitecture decision making