So I've been a developer at my current job for about 12 years. I am the most senior level developer at my job. Let me state that I am a backend developer although I did frontend development off and on as well for the first 5 years of my career. However I have done no major frontend development for around 7 years now.

Effectively our frontend developer of 6/7 years just left.

We had an existing project in the queue and my boss expected me to do frontend development for this project which I did just to help out, but I am not getting any extra pay for this and I absolutely hate doing it. The only thing I was paid for was I overtime for completing the project quicker. With that being said I feel like I should be paid substantially more since I am doing double work and since they are not paying for a frontend developer. I'm literally doing her job and doing a better job than she did mistake wise doing her job.

Additionally many things have changed over the past 6/7 years and they have it in their minds since I did it in the past it should be the same now which isn't the case. So there are things in my project queue right now for future projects that they think I know how to do and I don't. It isn't that I couldn't eventually figure it out. It is just that I have zero desire to learn it .I just absolutely hate styling websites.

I'm ok with doing minor frontend things for projects but not entire websites

I literally develop the backend off all the sites we build setup Google tag manger tags/triggers, Google analytics, search console, Google looker studio, dns, site updates, manage all out Linux servers, do seo for content and sites. I can't handle something else on my plate. I'm currently having to rewrite a ton of code as well due to upgrades for our sites.

How do I respectfully tell my boss I refuse to do frontend work going forward or pay me substantially more on another project and that he needs to hire someone else without damaging our relationship?

I like my boss and my coworkers as people a lot outside of work, but I feel like I'm being taken advantage of financially and I'm honestly tired of it. As a developer for 12 years I'm honestly ready to just go elsewhere.

So, I'm going to apologize before I even start this rant...lol. I am the Senior level web developer at my job and have been there for around 12 years now. I have been there at least 2 times as long as everyone else.

I also want to say that my boss is a good man and I really like my coworkers and he has helped me through a lot over those 12 years and I don't want to sound ungrateful. However, I am so fed up with my job. I think the only reason I stay is the fear of the unknown of switching jobs and that I really like the overall work environment and my coworkers.

With that being said I have been with my boss almost since the inception of the company and I am the only original employee there. I have seen the company grow from 3 employees including the secretary there. We now have like 20 employees.

I have never complained and I have showed continual growth and loyalty over those 12 years. However, like a month ago they had me post a a job position and it was for a social media position and the job required only 5 years of experience and it was within 8k of what I currently make. That made me so angry.

I am literally capable of doing everyone's job at my job including my own with ease. However, no one else at my job is capable of doing my job at all and I have a bachelors degree as well and certified in many different things as well.

Again I am the most senior person at my job period and the most senior person at the entire company. Not only am I an expert in the programming languages we use at our company, but im an expert at analytics(certified in GA4, looker studio, tag manager, etc).

Additionally, a month ago I was reached out to on linkedin by another company and was offered a job for almost 30 to 40K more than my current job is paying and better benefits than where I currently work and it was fully remote.

Should I even bother asking my boss to match this or should I just walk and go to the other company? Apparently loyalty and knowledge hold no value anymore.