Sr Software Engieer R&D

Jobylon AB; Atlanta (GA); On-site; USD 110,000 - 150,000; Full time

Job summary

Jobylon AB is seeking a Software Development Engineer to join our R&D team in Atlanta. You’ll design and build backend services in .NET/ASP.NET Core, and contribute to enterprise applications for a global client base.

You will also ship Angular components, work with Azure cloud services, and participate in design reviews, code reviews, and mentoring to raise reliability and performance across the product. Fluency in English is essential.

Qualifications

• 5+ years building production software.
• Strong C#/.NET (ASP.NET Core, Web APIs).
• Azure experience with at least two: App Service/Functions, Service Bus/Queues, Storage, Azure SQL (EF Core), Cosmos DB, Key Vault.
• Solid software design fundamentals (DDD where it helps, SOLID), async/distributed systems, and performance profiling.
• CI/CD with Azure DevOps (pipelines, environments).
• Practical security/auth: OAuth 2.0/OIDC, service-to-service auth, secrets management.
• Proficient written/spoken English for specs, design reviews, and cross-team collaboration

Responsibilities

• Design and build backend services and internal libraries in .NET/ASP.NET Core; evolve prototypes into reliable, observable services.
• Build quick POCs for agents/workflows using Semantic Kernel (function calling, plugins, tool orchestration, prompt/version management, RAG).
• Implement cloud-native patterns on Azure (App Service/Functions, Storage, Service Bus, Azure SQL/Cosmos DB) with CI/CD in Azure DevOps.
• Ship high-quality Angular components and internal tooling (Nx monorepo, Jest/Cypress).
• Contribute through design docs, code reviews, and mentorship; raise the bar on reliability, performance, and developer experience.

Skills

C#/.NET

ASP.NET Core

English proficiency

Distributed systems

CI/CD

OAuth 2.0/OIDC

Async programming

Education

B.S. in CS or related field

Tools

Azure

Azure DevOps

Cosmos DB

EF Core

Service Bus

OpenTelemetry

Angular

Nx

Semantic Kernel

Job description

We are looking for a Software Development Engineer to join the R&D team. Our team is

looking for a motivated professional who is skilled in software development, delivering high

quality products, and building multifaceted enterprise applications for a diverse and growing

international client base. We are proud to foster a workplace that promotes teamwork,

advanced development tools, training, and continuous engagement with senior and

executive management.

What you’ll do

• Design and build backend services and internal libraries in .NET/ASP.NET Core; evolve prototypes into reliable, observable services.
• Build quick POCs for agents/workflows using Semantic Kernel (function calling, plugins, tool orchestration, prompt/version management, RAG).
• Implement cloud-native patterns on Azure (App Service/Functions, Storage, Service Bus, Azure SQL/Cosmos DB) with CI/CD in Azure DevOps.
• Ship high-quality Angular components and internal tooling (Nx monorepo, Jest/Cypress).
• Contribute through design docs, code reviews, and mentorship; raise the bar on reliability, performance, and developer experience.

Required Qualifications

• B.S. in CS or related field (or equivalent experience).
• 5+ years building production software; strong C#/.NET (ASP.NET Core, Web APIs).
• Azure experience with at least two: App Service/Functions, Service Bus/Queues, Storage, Azure SQL (EF Core), Cosmos DB, Key Vault.
• Solid software design fundamentals (DDD where it helps, SOLID), async/distributed systems, and performance profiling.
• CI/CD with Azure DevOps (pipelines, environments
• Practical security/auth: OAuth 2.0/OIDC, service-to-service auth, secrets management.
• Proficient written/spoken English for specs, design reviews, and cross-team collaboration

Nice to have

• Semantic Kernel in production (plugins/tools, agentic patterns), Azure OpenAI or other LLM providers; RAG with Azure AI Search
• Angular (v15+), RxJS, Nx; Ionic for mobile.
• Messaging & jobs: NServiceBus, Azure Service Bus, Hangfire/Durable Functions.
• Observability: Application Insights, OpenTelemetry.
• Data/analytics: SQL tuning, Power BI Embedded, Databricks/Spark.
• Feature flags (LaunchDarkly), domain eventing, multi-tenant SaaS experience.