20 beste vacatures voor de functie van software developer in waddinxveen (nieuwe medewerkers gezocht)

.NET/C# Backend Developer
Eneco —Rotterdam
- € 70.000 - € 95.000 per jaar
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- Databases
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- Werk vanuit huis
2 uur
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Just —Den Haag
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Webprogrammeur / Softwareontwikkelaar (m/v)
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Front-End Project Planner
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Java Ontwikkelaar - Digitale Overheid
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Front-End Project Planner
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.NET/C# Backend Developer

Eneco -
Rotterdam

Nu solliciteren

Vacaturegegevens

€ 70.000 - € 95.000 per jaar
2 uur geleden

Secundaire arbeidsvoorwaarden

Winstdeling
Werk vanuit huis
Flexibele werkuren

Kwalificaties

CI/CD
Azure
Relationele databases
DevOps
C#
Microsoft SQL Server
.NET
Databases
Docker
Continue verbetering
APIs

Volledige vacaturetekst

- 3-5 jaar, > 5 jaar

- Enterprise IT Solutions, Tech
- €70.000 - €95.000

Deel op social media:

.NET/C# Backend Developer

- Eneco - Regio Rotterdam
- Enterprise IT Solutions, Tech
- 3-5 jaar, > 5 jaar
- €70.000 - €95.000

Apply

Good to know: you can easily save this vacancy using the print button at the top of the page. After the closing date, this vacancy will be removed from our website.

Backend work with two layers of impact

Most backend roles live inside one team, one product, one domain. Here you contribute to the B2B platform day to day and to Eneco's organisational backend ecosystem through the Community of Practice. Your architectural input reaches further than your own codebase.

A team that ships and cares about quality

You will work with a full cross-functional B2B team - product, design, frontend, testing - that is focused on delivery. And you will work with backend engineers across Eneco who care enough about quality to meet regularly and hold each other accountable to high standards.
Engineering that connects to something real

Eneco's B2B platform helps businesses make smarter, more sustainable energy choices. The integrations and APIs you build directly enable that. By 2035, Eneco aims to be climate neutral - your platform is part of how that happens.

Why choose Eneco?

What you’ll do

Backend Development - B2B Platform

Design, develop, and maintain .NET/C# backend services, APIs, and integrations that power Eneco's B2B digital platform
Build and maintain the integration layer between frontend and backend systems, ensuring reliability, performance, and maintainability
Contribute to the full software development lifecycle - from solution design and implementation through to testing, deployment, and operational support
Collaborate closely with frontend engineers, product managers, testers, and designers to deliver business features end to end
Identify and resolve performance, reliability, and maintainability issues proactively

Backend Architecture - Community of Practice

Participate actively in Eneco's Backend Community of Practice - a cross-organisational group of backend engineers working together to optimise the backend ecosystem
Contribute to architectural discussions about backend standards, patterns, and tooling across the organisation
Support knowledge sharing, code reviews, and technical best practices to raise engineering quality across teams
Help evaluate and validate technical solutions through Proof of Concepts in collaboration with architects and senior stakeholders

Engineering Quality and Ownership

Write clean, testable, and maintainable code that meets both business and technical requirements
Take ownership of assigned work - communicate progress, flag blockers early, and deliver reliably
Contribute to documentation and continuous improvement initiatives within the team
Expand your skills beyond your core stack when the team needs it - you bring a T-shaped mindset

Is this about you?

You are a backend engineer who takes pride in writing code that other engineers enjoy working with. You have 3-5 years of experience with .NET/C# and you know your way around a production environment - you have built APIs, debugged integrations, and cared about what happens after deployment. You are not just a feature builder. You care about the bigger picture - how systems connect, how decisions made today affect the platform in two years, and how to push back constructively when a shortcut creates long-term debt. If the idea of shaping backend standards across an entire organisation - not just within your own team - sounds interesting rather than abstract, this role was written for you.

Experience

Hands-on backend development experience with .NET/C#
Experience building and maintaining APIs, backend services, and integrations in a production environment
Familiarity with cloud platforms, particularly Azure
Experience with relational databases, specifically SQL Server - designing and optimising data access solutions
Experience with containerised applications (Docker) and modern architectures such as microservices and event-driven systems
Comfortable working in CI/CD pipelines and contributing to DevOps practices

Knowledge and Expertise

Solid understanding of software design principles, clean code practices, and what makes code maintainable and testable
Familiarity with integration patterns between frontend and backend systems
Understanding of scalable and performant backend architecture
Experience in or appetite for cross-team technical collaboration and architectural discussions
Exposure to the energy sector, B2B digital platforms, or large-scale enterprise environments is a plus - not a requirement

Skills and Competencies

Collaborative by nature - you work well with frontend engineers, product managers, testers, and designers
Clear communicator who can contribute to architectural discussions and articulate technical trade-offs
Ownership mindset - you take responsibility for your work from design through to production
T-shaped: strong backend depth with the flexibility to support the team across disciplines when needed
Curious and learning-oriented - you look for ways to improve systems and share what you learn

You’ll be responsible for

Purpose of the Role

Eneco's B2B platform connects businesses to smarter, more sustainable energy choices. Behind every digital interaction - every integration, every API call, every data flow - is backend infrastructure that needs to be reliable, scalable, and clean. That is where you come in.

You will be the backend engineer embedded in Eneco's B2B product team, building and maintaining the .NET platform that sits between frontend and backend systems. Most of your time goes into delivering business features alongside product managers, frontend engineers, testers, and designers. The rest goes into something rarer - a cross-organisational Backend Community of Practice where backend engineers from across Eneco collaborate to keep the organisational backend ecosystem healthy, consistent, and future-proof.

This is not a role where you code in a silo. You will shape backend decisions that matter beyond your own team.

This is where you’ll work

You will join Eneco's Tech department as part of the B2B product team - a cross-functional group of frontend engineers, backend engineers, product managers, testers, and designers focused on building digital solutions for Eneco's business customers. Around 80-90% of your time is spent here, delivering features end to end.

The other 10-20% of your time goes into Eneco's Backend Community of Practice - a vertical team of backend engineers from across the organisation who come together regularly to align on standards, review architectural decisions, and keep the organisational backend ecosystem in good shape. This gives you a wider view than most backend roles offer - you are not just building for one team, you are helping shape how Eneco builds backends at scale.

You will work hybrid - focus days at home combined with collaboration days at Eneco's Rotterdam HQ.

What we have to offer

Gross annual salary between €70.000 and €95.000

Including FlexBudget, 8% holiday allowance, and depending on your role a bonus or collective profit sharing.

FlexBudget

Including FlexBudget, 8% holiday allowance, and depending on your role a bonus or collective profit sharing. Have it paid out, use it to buy extra holiday days or save it up for something nice, it's up to you.

Personal and professional growth

Eneco is fully committed to help you in your personal and professional development.

Hybrid working: home, office or abroad

Work 40% at the office, 40% from home, and 20% flexibly. With manager approval, you may work abroad (within approved countries) up to 3 weeks/year, max 2 consecutively.

Want more information about our terms of employment?

Here's what you get from us

Work Where Everyone Matters

When you choose a career at Eneco, you choose ambition, growth, and opportunity in an environment where everyone matters. You’re given the space to develop yourself and to do your work in a way that suits you. We believe that different perspectives, nationalities, and backgrounds make us stronger, which is why we foster an open, safe and inclusive culture. Naturally, we also prioritize a healthy work-life balance, flexible working hours, and the option to work from home when your role allows it. If you have a physical or sensory disability, we will work with you to find the right adjustments so you can perform your job well.

This is how you build your own future and a sustainable future at the same time. Together with 4,000 colleagues, each with their own talents and ideas, you work on our shared mission: speeding up the energy transition. We help customers become more sustainable faster, create innovative solutions, and seize new opportunities. Will you join us?

The phases of our application procedure

Want to know more about this job function?

Please apply directly via the Eneco Careers Portal. Applications submitted by email will not be processed.

Third Party Disclaimer

Eneco manages recruitment through selected channels and preferred partners. Unsolicited acquisition, candidate submissions, or commercial outreach in relation to this vacancy are not appreciated.

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software developer vacatures in waddinxveen

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Zoek vacatures in meer locaties

.NET/C# Backend Developer

Why choose Eneco?

What you’ll do

Is this about you?

You’ll be responsible for

This is where you’ll work

What we have to offer

Gross annual salary between €70.000 and €95.000

FlexBudget

Personal and professional growth

Hybrid working: home, office or abroad

Want more information about our terms of employment?

Work Where Everyone Matters

The phases of our application procedure

Want to know more about this job function?