Thimo Koolen Profile
Thimo Koolen

@thimok_dev

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Guiding Junior Software Engineers to Medior Level | Career Insights | .NET, Blazor & Aspire

Joined January 2025
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@thimok_dev
Thimo Koolen
3 hours
RT @thimok_dev: What it really means to 'own' a feature. Most juniors think it's just about writing code. But owning a feature? That's dif….
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@thimok_dev
Thimo Koolen
3 hours
- Learn to communicate technical concepts clearly. If you're a junior dev right now and you're NOT doing this:. Why are you holding yourself back?. The path to medior is clear. You just need to take that first step.
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@thimok_dev
Thimo Koolen
3 hours
They wait for instructions instead of taking initiative. They avoid difficult conversations. Want to grow to medior?. - Start owning features end-to-end. - Take responsibility for outcomes, not just output. - Build relationships with stakeholders.
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@thimok_dev
Thimo Koolen
3 hours
- Planning the implementation.- Documenting everything.- Supporting after release.- Handling deployment.- Testing thoroughly. I've seen countless juniors struggle with this transition. They focus on coding, ignore the rest.
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@thimok_dev
Thimo Koolen
3 hours
What it really means to 'own' a feature. Most juniors think it's just about writing code. But owning a feature? That's different. You're responsible for:.- Understanding business requirements.- Managing stakeholder expectations.- Writing clean, maintainable code
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@thimok_dev
Thimo Koolen
4 hours
What's a question you want to ask? Share your thoughts in the comments! 👇.
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@thimok_dev
Thimo Koolen
4 hours
Did you know I'm on other platforms too?. Follow me on LinkedIn: Follow me on BlueSky: Follow me on X/Twitter:
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@thimok_dev
Thimo Koolen
4 hours
Follow me ✨ for more tips and insights on how to grow from Junior to Medior Software Engineer, Object Oriented Programming Principes, general software engineering tips, humor and so much more!.
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@thimok_dev
Thimo Koolen
4 hours
.NET devs: What's a .NET tool or NuGet package you can't live without? #Software #Engineer #SoftwareEngineering #Code #Dotnet #NuGet.
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@thimok_dev
Thimo Koolen
23 hours
What advice would you give your younger self that wants to grow as a software engineer? Share your thoughts in the comments! 👇.
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@thimok_dev
Thimo Koolen
23 hours
Did you know I'm on other platforms too?. Follow me on LinkedIn: Follow me on BlueSky: Follow me on X/Twitter:
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@thimok_dev
Thimo Koolen
23 hours
Follow me ✨ for more tips and insights on how to grow from Junior to Medior Software Engineer, Object Oriented Programming Principes, general software engineering tips, humor and so much more!.
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@thimok_dev
Thimo Koolen
1 day
RT @thimok_dev: How to give feedback as a junior without overstepping. Giving feedback is challenging when you're just starting your career….
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@thimok_dev
Thimo Koolen
1 day
Your team will value your input more than you think.
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@thimok_dev
Thimo Koolen
1 day
The best junior developers don't wait for permission to contribute. They build trust by giving thoughtful, well-structured feedback. Don't let the senior's ego be in the way of your growth. Save this guide. Use it in your next code review.
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@thimok_dev
Thimo Koolen
1 day
- Remember there's often more than one right way to solve problems. 5. Know when to step back.- Recognize when a topic is beyond your current experience. - It's okay to say "I might be missing something here.".- Learning when not to give feedback is as important as giving it.
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@thimok_dev
Thimo Koolen
1 day
- It shows you've done your homework before speaking up (this is great). 4. Present alternatives, not demands.- Phrase feedback as suggestions rather than corrections. - Share your reasoning and be open to discussion.
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@thimok_dev
Thimo Koolen
1 day
- Discuss patterns and practices objectively. - Avoid making it personal or questioning someone's abilities. 3. Back your feedback with documentation.- Reference official docs, style guides, or team conventions. - This adds credibility to your suggestions.
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@thimok_dev
Thimo Koolen
1 day
- Ask for clarification before suggesting changes. - This shows respect and helps you understand the full context. - Your curiosity will be appreciated more than immediate criticism. 2. Focus on the code, not the coder.- Keep comments specific to the implementation.
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@thimok_dev
Thimo Koolen
1 day
Because they don't feel experienced enough to go against their experienced team members. Don't let uncertainty stop you from contributing. Here's a 5-step guide to giving effective and great feedback as a junior developer:. 1. Start with questions, not statements.
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