Senior .NET Engineer

Springtime Technologies GmbH; Wien; On-site; EUR 40,000 - 48,000; Full time

Benefits offered by this job

Flexible Arbeitszeiten

No Dresscode

Kaffee, Tee o. Ä

Gute Anbindung

Team Events

Job summary

Springtime Technologies GmbH sucht erfahrene Senior .NET-Entwickler zur Verstärkung des Invoicetrack-Teams. Sie arbeiten an Backend-Services bis zu React-Frontends und gestalten klare API-Verträge mit Frontend-Teams. Eigenverantwortung, Ownership und hohe Qualitätsstandards sind gefragt.

Sie arbeiten eng mit Product Management, DevOps und dem AI-First Ansatz zusammen. Dabei setzen Sie moderne Tools wie Docker, Kubernetes und GitHub Copilot daily ein und prägen die Architektur sowie die

Qualifications

• Senior .NET Erfahrung und 5+ Jahre Backend-Entwicklung in C#, ASP.NET und Entity Framework.
• Erfahrung mit RESTful-APIs und verteilten Systemen, Elasticsearch, Kafka, Docker, Kubernetes und relationalen Datenbanken.
• Hands-on Erfahrung mit React und TypeScript, inklusive State-Management-Bibliotheken.
• CI/CD-Pipelines, Testing (xUnit/NUnit) und DevOps-Grundlagen.
• Gute Englischkenntnisse in Wort und Schrift.

Responsibilities

• Architekturentscheidungen treffen und Back-End-Architektur und Datenmodellierung führen.
• Features end-to-end entwerfen und implementieren, von .NET-Services über REST-APIs bis React-Frontends.
• Zusammenarbeit mit Product Management zur Umsetzung von Produktanforderungen.
• AI-Tools (z. B. Claude Code, Copilot) integriert nutzen und qualitätssichernd reviewen.
• CI/CD, Monitoring, Sicherheit und Skalierbarkeit in Produktion optimieren.

Skills

DotNET

C#

React

TypeScript

RESTful APIs

Azure

Distributed systems

CI/CD

English (Fluent)

Education

5+ Jahre Berufserfahrung in Softwareentwicklung

Abgeschlossenes Studium in Informatik oder vergleichbar

Tools

Docker

Kubernetes

Azure Services

SQL Server

Elasticsearch

Kafka

React

jira

Confluence

Job description

Deine Rolle im Team

• We are growing our .NET engineering team and are in a search of senior full-stack engineers.
• The team builds the Invoicetrack platform, from the back-end services to the interfaces customers work in, in close collaboration with product management.
• You are a senior engineer with real ownership.
• You design, build and run what you ship, and you help shape how the team works.
• One of these roles carries stronger technical leadership: setting standards, guiding design decisions and raising the quality of the whole team.
• Work with AI agents daily.
• Tools such as Claude Code and GitHub Copilot are your default way of working, and you know what to delegate and when to take the wheel.
• Own what AI produces.
• You give agents clear context and review their output critically, accountable for its correctness and security.
• Writes AI ready specs with testable acceptance criteria before any code is written.
• Hands whole tasks to AI coding agents and checks the output against the spec.
• Has the agent write tests first; nothing merges until CI and coverage checks pass.
• Reviews by outcome, not line by line, and improves the team’s shared skills and conventions.
• Raise the team’s game.
• Share prompts, tools, skills and workflows that work.
• In the technical leadership role, set the standards for how the team works with AI.
• Ship software finance teams rely on.
• Build across the stack.
• Design and deliver features end to end, from .NET 10 services and RESTful APIs to React front ends, and agree clear API contracts with the front-end engineers you build them with.
• Shape the architecture.
• Lead back-end architecture and data modelling decisions on SQL Server, applying clean architecture and domain-driven design so the platform stays scalable, fast and maintainable.
• Set the quality bar.
• Establish coding standards and best practices through code review, design discussion and example, and give feedback that helps other engineers improve.
• Work with product.
• Turn product problems into technical solutions with the product manager, and push back when there is a simpler or better way.
• Run what you build.
• Work with DevOps on CI/CD pipelines, Docker and Kubernetes deployments and monitoring, and keep improving the performance, security and scalability of services in production for enterprise customers.
• Grow the team.
• Share knowledge, support other engineers and help hire the people who join after you.

Unser Angebot

• The minimum gross salary for this position is €3,954 per month, as determined by the IT Collective Agreement.
• The actual salary will be based on your qualifications and experience.

Technologien und Skills

• C#
• Docker
• Apache Kafka
• xUnit
• ASP.NET
• TypeScript
• Kubernetes
• .NET
• Confluence
• Azure
• React
• SQL Server
• RESTful API
• Elasticsearch
• NUnit
• Entity Framework
• JIRA

Unsere Erwartungen an dich:

Qualifikationen

• You are also comfortable working with legacy systems on .NET Framework 4.8.
• An AI-first way of working.
• You use AI tools such as GitHub Copilot and Claude as your default in daily development, not occasionally.
• You work well with engineers, product managers and DevOps, and you make the people around you better.
• You are at home in Jira and Confluence.
• You want to make a difference, take ownership and hold yourself to a high standard.
• A track record of setting standards or leading technical decisions is a strong plus, and essential for one of the two roles.
• Excellent English, written and spoken.

Erfahrung

• Senior .NET experience.
• 5+ years building production back-end systems in C#, ASP.NET and Entity Framework, including .NET 10, with strong fundamentals in performance and a real affinity for good code design, refactoring and testability.
• Strong experience designing RESTful APIs and distributed systems, working with Elasticsearch, Kafka, Docker, Kubernetes and various Azure services, and building on relational databases such as SQL Server.
• Hands‑on experience with React and TypeScript, including state management libraries and integrating front ends with back-end APIs.
• Experience with xUnit or NUnit and integration testing, and a working understanding of CI/CD pipelines.
• Experience with SaaS platforms is a plus, though not required.

Benefits

• Flexible Arbeitszeiten
• No Dresscode
• Kaffee, Tee o. Ä
• Gute Anbindung
• Team Events