Senior Golang Backend Engineer for Real-Time AdTech Fraud

Sigma Software; Województwo mazowieckie; Hybrid; PLN 180,000 - 300,000; Full time

Job summary

Sigma Software is seeking a Senior Golang Backend Engineer to join a cross-functional team building AdTech and cybersecurity solutions. You will design, develop, and optimize high‑load backend services that process trillions of requests while collaborating with data scientists, analysts, and product managers.

The project focuses on real-time risk assessment for digital advertising, detecting fraud, and ensuring scalable, cost-efficient operations.

Qualifications

• 5+ years of commercial software development experience.
• Strong commercial experience with Golang and backend engineering.
• Strong Computer Science fundamentals including algorithms, data structures, concurrency, and system design.
• Proven experience with high-load distributed systems.
• Experience with performance tuning, latency optimization, and memory management.
• Hands-on experience with Kubernetes, Terraform, and Helm Charts.
• Good understanding of DevOps practices and cloud-native deployments.
• Experience with SQL databases and large-scale data processing.
• Experience working with AI tools, LLMs, or agent-based systems.
• Product-oriented mindset and ability to align technical solutions with business goals.
• Experience across the full software development lifecycle
• Ability to design stable, maintainable, and scalable architectures
• Availability to work with flexible hours and maintain 3–4 hours overlap with EST time zone
• Upper-Intermediate English level or higher

Responsibilities

• Design, develop, and maintain high-performance backend services in Golang
• Build and optimize distributed systems processing trillions of prediction requests daily
• Collaborate with data scientists, malware analysts, researchers, and product managers
• Improve system scalability, reliability, latency, and cost efficiency
• Develop, test, review, deploy, and maintain software across multiple environments
• Ensure software quality through clean architecture and engineering best practices
• Contribute to backlog prioritization and technical planning
• Deploy and support services in Kubernetes environments
• Investigate fraudulent activities and develop new fraud prevention approaches
• Drive engineering excellence within a collaborative product-oriented team

Skills

Golang

Backend engineering

Distributed systems

Algorithms

Data structures

Concurrency

System design

Kubernetes

Terraform

Helm charts

Cloud-native

SQL databases

AI tools/LLMs

Product mindset

Tools

Kubernetes

Terraform

Helm Charts

Job description

Sigma Software is seeking a Senior Golang Backend Engineer to join a cross-functional team building AdTech and cybersecurity solutions. You will design, develop, and optimize high‑load backend services that process trillions of requests while collaborating with data scientists, analysts, and product managers.

The project focuses on real-time risk assessment for digital advertising, detecting fraud, and ensuring scalable, cost-efficient operations.