Software engineering · Consulting

External expertise for demanding cloud and backend projects.

Software architecture, cloud DevOps, container-based infrastructure, and AI integration — for industrial and mobility clients in the Stuttgart region.

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Services

Four focus areas that usually come together in practice — from architectural design to ongoing operations.

Software Architecture

Design and review of distributed systems: microservice boundaries, API strategy, cloud migration. Mentoring engineering teams on architectural principles.

DevOps & Containers

Cloud-native platforms with container orchestration (Kubernetes, ECS, Fargate). Primary focus on AWS with long-standing, in-depth experience; broadly cloud-agnostic toolchain using Terraform and GitHub Actions. Observability with Prometheus, Grafana, and Splunk. Infrastructure as Code as a lived standard.

AI & Developer Tooling

Selection, rollout, and integration of AI-powered developer tools — Claude, Cursor, GitHub Copilot, and others. Connecting language models to backend systems, identifying realistic use cases, prompt and tool-use architecture.

Backend Development

Java, Kotlin, Spring Boot. REST APIs, secure and observable services. Security audits and hardening of production systems. "You build it, you run it" as a team principle.

How we work

Clearly defined engagements, no vendor lock-in when choosing tools.

Remote or on-site

On-site on a daily basis in the Stuttgart region; remote across Germany and internationally.

Project- or time-based

Defined deliverables as well as longer-term engagements in the role of tech lead, architect, or DevOps engineer.

Parallel engagements

The company serves multiple clients in parallel. Capacity is coordinated transparently.

Technologies

Tools and platforms we work with in production environments.

Languages: Java, Kotlin, Python, TypeScript, Bash, Perl
AWS: EC2, ECS, ECR, Fargate, Lambda, S3, CloudFront, Route 53, API Gateway, Cognito, IAM, DynamoDB, ElastiCache (Redis), CloudWatch, Systems Manager, Secrets Manager, Trusted Advisor
Containers & Orchestration: Docker, Kubernetes, ECS, Fargate
Infrastructure as Code: Terraform, Cloud-Init
CI/CD: GitHub Actions, Jenkins
Observability: Prometheus, Grafana, Splunk, NewRelic
Databases: PostgreSQL, MariaDB, Oracle, DynamoDB, Redis, DerbyDB
Frameworks & Runtimes: Spring Boot, Node.js
Auth & Security: Auth0, Cognito, IAM, OAuth/OIDC, Let's Encrypt
Web & Proxy: Nginx, Envoy, Apache
Build & Tooling: Git, IntelliJ IDEA, Gradle, Maven, npm, Bitbucket, Jira, Confluence, Contentful
AI & Dev Tooling: Claude, Cursor, GitHub Copilot, Claude Code
Linux: Debian, Ubuntu, Arch, CentOS

Collaborators & Partners

For larger engagements, we work on a project basis with experienced freelancers and partners — with focus on backend development, cloud architecture, and DevOps.

Beyond that, Diesner.IT GmbH is also open to permanent employment: if you bring the right profile and would like to join the team long-term, we welcome your message just as much.

Interested in collaborating or joining? Feel free to get in touch:

office@diesner.it

About us

Diesner.IT GmbH is an owner-led software engineering and consulting company based in Leonberg, in the greater Stuttgart area. Founded in 2016, the company builds on the consulting practice that founder Andreas Diesner has been running since 2005. We support industrial and mobility clients in the design, implementation, and operation of scalable backend systems and cloud-native platforms.

Our focus areas are software architecture, cloud DevOps with in-depth AWS experience, container-based infrastructure, and the integration of AI-powered tools into development and operations. For larger engagements, we collaborate with a trusted network of experienced freelancers and partners.

Management

Andreas Diesner

Principal Software Engineer · Managing Director

Founder and Managing Director of Diesner.IT GmbH. Working as an external consultant in the Stuttgart region since 2005, with focus on software architecture, cloud DevOps with in-depth AWS experience, and container-based infrastructure. Diplom-Ingenieur in Software Engineering (FH Esslingen) and M.Sc. in Distributed Computing Systems Engineering (Brunel University London).

Contact

For questions about potential collaboration or a specific project — the direct path is always the fastest.

Address

Diesner.IT GmbH
Eschenweg 23
71229 Leonberg
Germany