Posted 29 days ago
Senior .Net Developer
@ Bertelsmann-Jobs
Mississauga, Ontario
Overview
Arvato is hiring a Senior .NET Developer to modernize, develop and maintain its warehouse management software platform. The work covers migrating legacy .NET Framework apps to modern .NET, building backend services and APIs, and supporting mobile and Windows applications with Microsoft SQL Server. This is a full-time role with company-paid health and life insurance, paid time off and development training.
Responsibilities:
- Design, develop, test and maintain .NET web and backend applications
- Lead application architecture, design patterns and coding standards
- Perform code reviews for quality, performance and security
- Troubleshoot and resolve complex issues across environments
- Support process improvements and project planning
Requirements summary:
- 5+ years of professional .NET development experience
- Strong proficiency in C#, ASP.NET, .NET Core and Web APIs
- Experience with SQL Server and optimized queries
- Experience with Git and CI/CD pipelines
- Strong communication with technical and non-technical stakeholders
Tools & skills
Benefits mentioned
Source and dates
Employer career site / ATS feed · smartrecruiters
- Employer posting date
- 2026-10-08
- First seen by our source
- 2026-10-08
- Source record updated
- 2026-10-09
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Seniority | Senior |
| Department | Software development |
| Experience | 5+ years |
| Hours per week | 40 (estimated) |
| Work setting | Office |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
| Education | Bachelor’s degree (preferred) |
| Fields of study | Computer Science, Information Technology |
| Perks mentioned | Generous paid time off, Wellness, Paid training |
Summary and details written by AI from the posting; the employer’s posting is the authority.
Bertelsmann-Jobs
Saved company profile
Historical company information from a saved The Jobs API profile (LinkedIn/Crunchbase fields). It is not live-verified; figures may have changed. Missing values remain unknown.
We Empower Digital Leaders.
Full company description
We are Arvato Systems - and we live digitalization. As an international IT specialist, we support companies on their journey into the digital future - with expertise and real team spirit. Whether cloud, IT operations, or process integration: together with our customers, we develop innovative solutions that make a difference. What makes us special? Our in-depth understanding of the industry, strong technical expertise, and clear focus on our customers' needs. We listen, think, and act with foresight - always to make the digital world simpler, more efficient, and more secure. As part of Bertelsmann, we stand on the solid foundation of a German global corporation - and are building the digital world of tomorrow together with strong partners such as AWS, Google, Microsoft, and SAP. Follow us to learn more about digital transformation - and how we can shape it together.
- LinkedIn followers
- 41,774
- People associated on LinkedIn
- 3,019
- Reported office locations
- Reinhard-Mohn Straße 18, Gütersloh, Nordrhein-Westfalen 33333, DE
- Rheinstraße 99, Baden-Baden, Baden-Württemberg 76532, DE
- Uhlandstraße 30, c/o RTL Audio Center Berlin GmbH Arvato Systems GmbH, Berlin, BE 10719, DE
- Semerteichstraße 50-66, Dortmund, 44141, DE
- Brook 1, Hamburg, Hamburg 20457, DE
- Marie-Curie Straße 6, Kamp-Lintfort, North Rhine-Westphalia 47475, DE
- Martin-Luther-Ring 7-9, Leipzig, Sachsen 04109, DE
- Neumarkter Straße 63, München, Bayern 81673, DE
- Stau 123, Oldenburg, Niedersachsen 26122, DE
- Ringstraße 16 - 20, Rheda-Wiedenbrück, Nordrhein-Westfalen 33378, DE
- Joachim-Jungius Straße 9, Rostock, Mecklenburg-Vorpommern 18059, DE
- Melli-Beese Straße 11, Köln, Nordrhein-Westfalen 50829, DE
- Business categories
- Information Technology
- Cyber Security
- Consulting
- Software
- Security
- Cloud Computing
- Cloud Data Services
- IT Infrastructure
- Other recorded names
- Bertelsmann-Jobs
- Arvato Systems
- Specialties
- Digital Transformation
- Cloud
- IT Solutions
- AWS
- Google Cloud Platform
- Microsoft
- SAP
- Healthcare
- Pharma
- Manufacturing
- Media
- Entertainment
- Public
- Retail
- Consumer Goods
- Utilities
- Souvereign Cloud
- and Life Science
- Profile identifies a recruitment agency
- No
- Reported total investment
- 0
Currency and observation date were not supplied; this is not a current valuation or a funding round.
We are Arvato Systems - and we live digitalization. As an international IT specialist, we support companies on their journey into the digital future - with expertise and real team spirit. Whether cloud, IT operations, or process integration: together with our customers, we develop innovative solutions that make a difference. What makes us special? Our in-depth understanding of the industry, strong technical…
| Field | Value |
|---|---|
| Industry | IT Services and IT Consulting |
| Company size | 1,001-5,000 employees |
| Headquarters | Gütersloh, Nordrhein-Westfalen |
| Organization type | Privately Held |
| Specialties | Digital TransformationCloudIT SolutionsAWSGoogle Cloud PlatformMicrosoftSAPHealthcarePharmaManufacturing |
| Open jobs on Jobsy | 4 |
| View page |
Company Description
We’re on it!
Arvato offers you one of the most dynamic work environments you can imagine. We are growing, innovating and we solve the challenges of our clients around the world every day. How do we do it? With our global team of 17,000 colleagues at 87 locations in over 17 countries and our special spirit: We're on it! As a strategic growth partner for our clients, we use cloud-based e-commerce and IT platforms as well as state-of-the-art automation technology to realize complex, global supply chain solutions.
Job Description
The Senior .NET Developer role supports the modernization, development, and maintenance of the warehouse management software platform, including migration of legacy .NET Framework applications to modern .NET, development of backend services and APIs, support of mobile and Windows-based applications, and work with Microsoft SQL Server. The role also contributes to improvements in architecture, performance, CI/CD, code quality, and development practices in collaboration with product, operations, and engineering teams.
- Design, develop, test, and maintain web‑based and backend applications using .NET technologies (C#, ASP.NET, .NET Core).
- Collaborate with product owners, business analysts, and cross‑functional teams to understand requirements and deliver effective technical solutions.
- Lead and contribute to application architecture, design patterns, and coding standards.
- Perform code reviews to ensure quality, performance, security, and maintainability.
- Troubleshoot, debug, and resolve complex technical issues across development, test, and production environments.
- Participate in project planning, contribute to process improvements, and support company growth initiatives.
- Interact with other departments, internal and external, to resolve conflicts effectively.
- Take initiative and ownership to support internal and external projects.
- Perform other duties as assigned by management.
- Abide by all company safety and hygiene regulations
- Continuous involvement and support with departmental process improvements
- Any additional tasks that may be assigned to ensure an efficient, safe, clean, and goal-oriented work environment
Qualifications
- Strong proficiency in C#, ASP.NET, .NET Core, and Web APIs.
- Experience with relational databases such as SQL Server and writing optimized queries and stored procedures.
- Solid understanding of object‑oriented programming, design patterns, and SOLID principles.
- Experience with version control systems (e.g., Git) and CI/CD pipelines.
- Strong problem‑solving skills and the ability to work independently in a fast‑paced environment.
- Strong analytical, problem-solving, and troubleshooting skills.
- Ability to communicate effectively with both technical and non-technical stakeholders.
- Adaptability and willingness to learn new technologies as needed.
- Ability to work collaboratively in a team environment and independently as required.
- Performing variety of duties as required.
- The ideal candidate will have a Bachelor’s degree in Computer Science, Information Technology, or a related field, or equivalent practical experience.
- 5+ years of professional experience in .NET development.
- Experience with front‑end technologies such as JavaScript, Angular, React, or Blazor.
- Familiarity with cloud platforms (Azure preferred) and cloud‑native application development.
- Experience with microservices architecture and containerization (Docker, Kubernetes).
- Knowledge of secure coding practices and application security standards.
- Prior experience in an Agile/Scrum development environment.
- Strong communication skills with the ability to explain technical concepts to non‑technical stakeholders.
- Professional certifications (such as Microsoft Certified: Azure Developer Associate, AWS Certified Developer, or similar) are a plus.
- Knowledge of SAP pertaining to operations.
Additional Information
- Company paid Medical, Dental, Vision, Life Insurance, and Accidental Death & Dismemberment Benefits.
- Non-taxable Long-Term Disability benefits.
- Paid Time Off, including paid holidays.
- Employee Assistance Program.
- Ongoing employee development training.
- Employee engagement activities.
Disclosure requirements pertaining to the collection of your personal data:
Responsible for processing the information provided in your application is the company specified in the job advertisement, with its registered office as indicated. The company processes your data for the purpose of establishing an employment relationship on the basis of Art. 6 (1) b GDPR / Section 26 (1) sentence 1 BDSG.
The retention period for your data is determined by the statutory time limits applicable in the respective country, beginning upon completion of the recruitment process. You can find these here.
You can contact the company’s Data Protection Officer at the above-mentioned postal address.
Further information on data protection and your rights can be found here.
We strive to be an equitable, inclusive, and accessible workplace for our employees and value their diverse perspectives, which contribute to the diversity of our company. Therefore, we welcome applications from people who enrich our company with their identity, background and personal experience. We are committed to providing a barrier-free recruitment process in accordance with applicable human rights and accessibility legislation. We want to keep the application process as simple as possible for you: focus on a meaningful resume; we do not require an elaborate cover letter. Please know that we can only accept your application through our online application portal.
Learn more about our commitment to Equal Opportunity and Accommodation Information here.
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