Middle/Senior Backend Engineer

Xsolla

. Develop and maintain backend services for the Xsolla ID platform using Go .

Posted 10/2/2026full-timeRemote • RussiaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing and maintaining backend services using Go, with a strong focus on OAuth 2.0 / OIDC flows and web security fundamentals. Proficient in optimizing database performance across various systems and implementing microservices architecture for scalable solutions.

Highest-signal resume keywords

Go ProgrammingOAuth 2.0 / OIDCPostgreSQL OptimizationMicroservices ArchitectureDocker

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Applicant Tracking System Keywords

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Hard Skills

Go ProgrammingPostgreSQLRedisOAuth 2.0OIDCWeb Security FundamentalsUnit TestingREST API DesignCI/CD PipelinesMicroservices

Soft Skills

CollaborationProblem-SolvingTechnical Documentation

Tools & Technologies

DockerGitNginxKubernetesJira

Industry Keywords

IAMB2C ProductsData MinimizationAudit LoggingDistributed Systems

Tech Stack

Tools & technologies

Distributed SystemsDockerKafkaKubernetesMicroservicesMySQLNGINXPostgresRabbitMQRedisSQLGo

About the role

Key responsibilities & impact

Develop and maintain backend services for the Xsolla ID platform using Go
Design and implement OAuth 2.0 / OIDC flows, token introspection, and refresh strategies
Work with the Ory ecosystem and extend the custom Auth API orchestrator and plugin architecture
Apply web security fundamentals including cookie security, CSRF/XSS protection, secure token storage, TLS, and secure session management
Optimize database queries and ensure high performance under heavy loads across PostgreSQL, MySQL, Redis, and CockroachDB
Build and maintain microservices architecture focused on reliability and scalability
Contribute to zero-downtime migration from legacy Xsolla Login with bidirectional identity sync
Write clean, well-tested code with comprehensive unit and integration test coverage
Collaborate with frontend engineers on SDK and widget integration
Participate in code reviews and contribute to technical documentation
Support production systems and troubleshoot issues across the authentication stack
Develop a next-generation IAM platform serving as the foundation for Xsolla B2C products

Requirements

What you’ll need

2+ years of commercial experience with Go
Strong understanding of PostgreSQL and Redis (query optimization, indexing strategies)
Working knowledge of OAuth 2.0 / OIDC auth flows (authorization code, client credentials) or strong motivation to learn
Understanding of web security fundamentals: CSRF, XSS, cookie security, TLS
Experience with Docker and docker-compose
Proficiency with Git and collaborative development workflows
Understanding of Nginx and web server configuration
Solid experience writing unit tests and maintaining high code quality
Good English reading skills (technical documentation)
Preferred: understanding of microservices architecture and distributed systems trade-offs
Preferred: experience with REST API design and Swagger/OpenAPI
Preferred: hands-on experience with CI/CD pipelines
Preferred: familiarity with the Ory ecosystem (Hydra, Kratos, Keto) or similar identity management frameworks
Preferred: knowledge of PKCE, client credentials, device flow, token introspection, and refresh-token strategies
Preferred: experience with CockroachDB or other distributed SQL databases
Preferred: experience with NATS, Kafka, or RabbitMQ
Preferred: familiarity with Jira
Preferred: understanding of Kubernetes and container orchestration
Preferred: familiarity with SOC 2, ISO 27001, GDPR data minimization, and audit logging
Preferred: practical, up-to-date experience with modern AI tools such as Claude, Copilot, or Cursor

Benefits

Comp & perks

Unlimited Flexible Time Off for work-life balance
Private health insurance (ДМС) with dental coverage for you and your family
Personalized career roadmap with clear growth paths (IC track or Leadership track)
Professional development through training and educational opportunities
Annual corporate events and team gatherings
Remote-first culture with flexible working hours (10:00–19:00)
Working at the cutting edge of the rapidly growing gaming and Web3 industry
Knowledge sharing culture with experienced engineers across the organization