Let me tell you something most career advice gets wrong.

It treats your income like the weather, something that happens to you. You show up, you work hard, you wait, and once a year someone hands you a 3% raise and a slice of supermarket cake. You’re supposed to be grateful.

I don’t believe in that model. I never have.

My name is Seki. I’m an industrial automation engineer originally from Tukuyu, a small town in the highlands of southern Tanzania, and today I live as a permanent resident in Mexico.

Between leaving my hometown and building the life I have now, I had to figure out how money actually moves, not how we wish it moved.

And the most important thing I learned is this: your income is negotiable, buildable, and stackable. It is not fixed. It is not handed down. You raise it on purpose.

Over four years, I doubled mine. Not through luck, not through some secret connection, but through six specific moves that anyone can use. Below, I’ll walk you through all six with the real numbers and the real story behind each.

Let’s get into it.

Ask for a raise with data, not feelings

Here’s the conversation that rarely works:

“I’ve been here a long time. I work really hard. I feel like I deserve more.”

I understand the emotion behind it. I’ve felt it. But put yourself in your manager’s chair for a second. “I feel like I deserve more” gives them nothing to act on.

There’s no number, no evidence, no business case. It’s a feeling, and feelings don’t get approved by a finance department.

Now compare it to this:

“Over the last year, I took ownership of the gas detection calibration program. We cut false alarms by 40%, avoided two unplanned shutdowns, and I trained three junior techs to run the system without me.

The market rate for someone doing this work is X. I’d like to bring my compensation in line with the value I’m delivering.”

See the difference? One is a plea. The other is a proposal backed by data.

When you walk in with numbers, you change the entire frame of the conversation. You’re no longer asking for a favor. You’re presenting a business case. And businesses respond to business cases.

Before you ever have that meeting, build your file.

What did you deliver?

Money saved, money earned, time reduced, risk avoided, and people trained. Quantify everything you can.

What’s the market paying for your role and skills right now? Check salary sites, recruiters, and people in your network.

What’s the ask?

A specific number or range, not “more.”

Keep a running document of your wins throughout the year. Don’t try to remember them all the night before. You won’t. Write them down as they happen so when the time comes, your case writes itself.

Feelings get sympathy. Data gets raises.

Switch jobs (this is the big one)

If you remember nothing else from this article, remember this section.

I switched jobs every 18 to 24 months, and over four years I doubled my income. Each switch came with a 20–30% salary increase.

Compare that to the standard 3–5% performance raise you get for loyalty, and the math becomes brutal.

Let me actually show you the brutal math, because it’s worse than most people realize.

Say you earn 100 and you stay put, collecting a generous 4% raise each year.

• Year 1: 100
• Year 2: 104
• Year 3: 108
• Year 4: 112

Four years of loyalty, and you’re at 112.

Now say you switch every two years with a 25% bump each time:

• Year 1: 100
• Year 2: 100
• Year 3: 125 (switch)
• Year 4: 125
• Year 5: 156 (switch)

By the time the loyal employee crawls to 112, the switcher is sitting near 156, and the gap compounds for the rest of your career because every future raise and every future offer is calculated off your current salary. Stay too long at a low base, and you carry that anchor for decades.

Why does this happen?

Because the people deciding your internal raise are working inside a tight budget with a fixed percentage pool.

The people making you an external offer are pricing you at market, and the market almost always values you higher than your current employer does. That’s just how it works. The new company has to pay a premium to pry you loose.

A few honest caveats, because I want you to do this wisely.

Don’t job-hop so fast it looks unstable

The 18–24 month rhythm is a sweet spot. Six months here, eight months there starts to scare recruiters.

Switch toward something, not just away. Each move should add a skill, a title, an industry, or a network, not just a number.

Stay where you’re learning fast

If a job is rapidly building your value, the on-the-job education can be worth staying a little longer. Just don’t confuse “comfortable” with “growing.”

Loyalty is a beautiful personal value. But companies rarely pay you for it. Switching is the single fastest legal way to reprice your income.

Build a skill that’s in short supply

Your salary isn’t really set by how hard you work. It’s set by how hard you’d be to replace.

That’s an uncomfortable truth, but it’s a useful one. If a hundred people can do your exact job, you have very little leverage no matter how many hours you put in. If only a handful of people can do what you do, you have enormous leverage.

So the move is simple to say and harder to do: find the skill your team or company most desperately needs and become the person who has it.

Here’s how I think about it:

Look for the bottleneck

What slows your team down? What problem keeps coming back? What does everyone avoid because it’s hard or nobody understands it?

In my world, it was the deep technical side of gas detection and safety systems, confined-space testing, sensor calibration, and the standards most people find intimidating. Few engineers wanted to own it. I did.

Go deep, not wide

Don’t collect ten shallow skills. Pick the one with the highest scarcity-times-demand and get genuinely excellent at it.

Become the go-to person

When you’re the one people have to come to, you’ve stopped being a cost and become critical infrastructure.

Then use it as leverage

Once you’re indispensable, your negotiating position transforms both for raises and for those job switches we just talked about.

Scarcity is leverage. Build the skill nobody else wants to build, and you stop competing on hours and start competing on value.

Negotiate often and harder than you think you can

This one I learned from a friend who used to work in HR, and it genuinely changed how I see every job offer.

She told me that when she made offers, she usually had three numbers approved: a low, a middle, and a high. And here’s the part that stung: she would lead with the lowest one.

Most people, relieved and grateful to be wanted, would simply say yes. They’d take the floor and never know two higher numbers were sitting right there in the file.

Read that again. The first offer is rarely the real ceiling. It’s the opening bid.

The people who negotiate aren’t being greedy or difficult; they’re simply reaching for money that was already budgeted for them.

The company expected a counter. They left room for it on purpose. When you don’t push back, you’re not being polite; you’re leaving your own money on the table.

So negotiate. Every time. A few principles that have served me well:

Always counter

Even a calm, respectful “Thank you, is there flexibility on the base?” can move the number. The worst case is they say no, and you’re exactly where you started.

Negotiate the whole package, not just salary. Signing bonus, vacation, remote flexibility, title, and a guaranteed early review. There are many levers.

Stay warm, not adversarial

You’re not fighting them. You’re finding the number where you both feel good. Tone matters enormously.

Be willing to pause

“Let me think it over” is a complete sentence and a quietly powerful one.

You will be surprised how much is available simply because you asked. Most people don’t. Be the one who does.

Take on visible, high-leverage projects

Not all work is created equal.

You can pour yourself into a quiet task that nobody notices, and at review time it’s invisible. Or you can put that same energy into a project that’s both visible and high-leverage, the kind that touches important goals and important people, and suddenly your work is doing double duty: delivering value and building your reputation.

These are the projects that get you promoted.

How to spot them:

It matters to leadership

It connects to a priority the decision-makers actually care about and talk about.

It’s visible

The right people see the outcome, and they know it was yours.

It has leverage

Success creates an outsized result, real money, real risk avoided, and a real strategic win.

It stretches you

Bonus: it forces you to build that scarce skill from move #3.

A word of caution: visible projects carry visible risk. If it goes badly, that’s seen too. So choose ones you can realistically deliver, then over-prepare.

The goal isn’t reckless spotlight-chasing; it’s making sure your best work is seen by the people who decide your future.

Quiet competence is admirable. But quiet competence that nobody notices doesn’t get promoted. Make your value visible.

Start a side hustle

This is the one I’m living right now, so let me be straight with you.

Everything above raises, switches, scarce skills, negotiation, and visible projects, all of it works inside your job.

It raises the income that one employer pays you. Powerful, but you’re still building on land you don’t own. One company still controls the tap.

A side hustle is different. A side hustle is income you build and own yourself. And once you taste that, your whole relationship with money changes.

This is exactly what I’m doing. Alongside my engineering career, I build content websites and online businesses.

This very blog, posteritywealth.com, grew out of my own story as an African engineer building wealth in Mexico as a permanent resident.

I run other sites too, across solar energy, industrial safety, personal finance, health, and football. Some I started years ago, and they run mostly on autopilot now. Each one is a small stream, and the streams add up.

You can monetize a side hustle in several ways:

Affiliate marketing: recommend products you trust and earn a commission. This is a big one for me.

Display ads: Once you have traffic, ads can run quietly in the background.

Offering a service: consulting, freelancing, or coaching in something you already know.

Digital products: guides, courses, and kits you create once and sell many times.

Now, here is the most important advice in this entire section, so don’t skip it:

You do not have to do all of it.

I do a lot because I’ve been at this a long time, building since around 2010. But I didn’t start that way, and you shouldn’t either.

Pick one thing.

A blog.

A YouTube channel.

An X account.

One. Start it, and stick with it long enough to make your first real money. Then and only then start the second. Let each one earn before you add the next.

Stack them slowly, one income stream at a time, and keep going until your side income quietly grows larger than the job that started it all.

That’s the path I’m walking. It’s not a get-rich-quick scheme; it’s a get-rich-for-sure discipline. And the best day to plant the first tree was years ago. The second-best day is today.

Putting it all together

Let me leave you with the whole picture, because these six moves aren’t really six separate ideas. They’re one strategy.

You build a scarce skill (#3). That skill lets you win visible, high-leverage projects (#5), which give you the data to ask for a raise (#1).

That same track record makes you valuable enough to switch jobs for a 20–30% jump (#2), and at every offer you negotiate hard for money that’s already waiting for you (#4).

And underneath all of it, you quietly build a side hustle you own (#6) so that one day, you don’t need anyone’s permission to give yourself a raise.

I went from a small town in Tanzania to a life I designed in Mexico, and I did it by refusing to treat my income as fixed. You can refuse too.

Pick one move from this list. Start it this week. Then come back for the next.

Your income is waiting for you to come and raise it.