Software Engineer – Backend Focus, .NET

Vendavo

. Build and extend event-sourced .NET services on .NET 10 and ASP.NET Core .

Posted 10/9/2026full-timePrague • CzechiaMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and extending event-sourced .NET services, deploying applications on AWS, and implementing GraphQL APIs. Proficient in modern development practices, including CI/CD pipelines and testing methodologies.

Highest-signal resume keywords

Event-Sourced .NET DevelopmentGraphQL API DevelopmentAWS EKS DeploymentDomain-Driven DesignCI/CD Pipeline Experience

ATS Keywords

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Hard Skills

.NET 10ASP.NET CoreMartenWolverinePostgreSQLDockerKubernetesXUnitTerraformHelm

Soft Skills

Critical Code ReviewCollaboration

Tools & Technologies

AWS KinesisAmazon MSKAzure DevOpsAI Coding AgentsGit

Industry Keywords

CQRSEvent SourcingIdempotent HandlersAsynchronous CodeRelational Data Modelling

Tech Stack

Tools & technologies

ASP.NETAWSAzureCloudDockerGraphQLKafkaKubernetesPostgresReactSQLTerraformTypeScript.NET

About the role

Key responsibilities & impact

Build and extend event-sourced .NET services on .NET 10 and ASP.NET Core
Deploy services to AWS EKS behind an Istio service mesh
Implement aggregates, commands, events, and read-model projections using Marten and Wolverine
Implement vertical slices from event model through backend handlers, projections, GraphQL API, and React screens
Build GraphQL APIs with Hot Chocolate, including filtering, sorting, pagination, and multi-tenant request handling
Work with AWS Kinesis streams and Amazon MSK (Kafka) for cross-service integration
Design idempotent and replay-safe message handlers
Maintain event models in draw.io and participate in modelling sessions
Work with Terraform, Helm deployments, and Azure DevOps pipelines
Use AI coding agents in delivery and participate in AI-assisted PR review
Contribute to the React 18 and TypeScript frontend when full-stack delivery is needed
Write tests, instrument services, and participate in code and design reviews
Modernize established CPQ and Pricepoint products by moving business logic from SQL Server stored procedures into .NET code

Requirements

What you’ll need

3+ years of backend development in modern .NET (.NET 6 or newer)
Working understanding of Domain-Driven Design and CQRS
Appetite to deepen knowledge of event sourcing, projections, eventual consistency, and idempotent handlers
Comfort with asynchronous and message-driven code, including queues, streams, retries, and out-of-order messages
Solid SQL and relational data modelling; PostgreSQL experience preferred
Experience building HTTP or GraphQL APIs
Docker and working familiarity with Kubernetes
Exposure to a major cloud, ideally AWS, including IAM, S3, EKS, and Secrets Manager
CI/CD pipeline experience; Azure DevOps preferred
Git-based workflows with pull request review and required checks
Testing experience with xUnit and integration tests against real dependencies
Regular hands-on use of an AI coding agent such as Claude Code, GitHub Copilot, Cursor, or equivalent
Ability to critically review AI-generated code and identify invented APIs, behavior changes, and missing edge cases
Willingness to maintain AI agent context files such as CLAUDE.md or AGENTS.md
Full ownership of merged code
English language ability is explicitly indicated through weekly English classes, but fluency is not stated as a requirement

Benefits

Comp & perks

Professional growth and development opportunities
Use of modern tools and access to experts
Team activities and company-sponsored events
Flexible working hours
Weekly English classes
International travel opportunities
25 days of paid vacation
4 additional company days off
3 sick days
2 days paid for charity activities
Monthly benefits allowance
Meal contributions
MultiSport card available
High-end laptop (Windows or Mac) and smartphone, including personal use
Discounted unlimited mobile plan for family members
Friendly, skilled team environment
Modern offices with recreation rooms