I built an ERC-20 + a voting DApp… but I still feel “not hireable” for junior blockchain roles. What should I build next?

Don’t chase “complex”. Most juniors do that and it backfires.

If I open a junior repo and it’s 300 lines of Solidity with no explanation and no tests, it doesn’t matter if it’s DeFi or not.

What makes me trust a junior is small stuff:

• you thought about access control (not just Ownable slapped on everything)

• you tested reverts / weird cases

• you can explain why you did it that way

Honestly a simple escrow / vesting / subscription contract can be more impressive than a fake lending protocol. Because those projects force you to deal with real edge cases and roles.

If you want a DeFi-ish project, do something tiny and honest (like “I built a simplified staking contract and here’s what I didn’t implement + why”). People can smell “pretend production” from far away.

Same situation tbh. I did ERC-20 + NFT mint + a small marketplace and I still got the “nice” replies but no interviews.

What I noticed is… the problem wasn’t “not enough projects”, it was that my repos looked like I did them for myself and not for someone else reading them.

When I fixed my README and showed what broke + what I learned, it started getting better. Not magically, but better.

If you build the next thing, I’d pick one project and make it look “real-ish” instead of starting a new repo again. I keep making that mistake.

I’d be careful with the “join more hackathons and build more projects” advice here.

Hackathons can help, but only if the final repo is readable after the event. I’ve seen junior devs submit decent hackathon projects, but the GitHub looks rushed: no clear README, no tests, no explanation of tradeoffs, and no note on what is incomplete.

For a junior blockchain developer portfolio, I’d rather see one project that shows:

• who can call which function

• what happens when something fails

• what you tested beyond the happy path

• what you deliberately did not build

• how your frontend handles contract errors

So yes, hackathons can be useful. But the hiring signal is not “I participated.” The hiring signal is whether the repo still makes sense to a reviewer after the hackathon is over

I screen a lot of junior profiles and the hard truth is: most look the same.

Not because people are bad — because everyone builds the same “token + voting + NFT” set.

What helps someone stand out is when I can quickly understand:

1. what you built

2. what could go wrong

3. what you did to prevent obvious mistakes

4. whether you can talk about it without sounding scripted

Multi-chain is not required for junior roles most of the time. It’s a plus, but fundamentals matter more.

If you can make one project easy to review (clear README, a couple tests, notes on tradeoffs), I’m more likely to shortlist you than someone with 10 half-finished repos.

This is a very real stage for junior blockchain developers: the project works, but the hiring signal is still unclear.

Most junior portfolios don’t fail because the idea is weak. They fail because the repo doesn’t show how the developer thinks under constraints — access control, failure paths, tradeoffs, testing choices, and what they intentionally left out.

Hiring teams are usually not asking, “Can this person build another ERC-20?”
They are asking, “Can I open this GitHub repo and understand how this person makes decisions?”

If you’re stuck after ERC-20 + voting, these two may help:

How hiring teams evaluate junior smart contract work:
The Smart Contract Portfolio That Shows How You Think | ArtofBlockchain

Why proof matters more than polished claims in Web3 hiring:
Proof-Based Hiring in Web3: A Founder’s Guide to Evaluating GitHub, Tests, Smart Contracts, and Audit Claims | ArtofBlockchain

The shift usually happens when you stop asking “what should I build next?” and start asking “what does this repo prove about how I think?”

I landed my first junior role last year and honestly my portfolio wasn’t fancy. What helped me was picking ONE repo and making it easy for someone to judge in 3 minutes.

Like I literally added:

a short “what this does” at the top

how to run tests in one line

one section called “things I messed up / fixed” (sounds stupid but people actually read it)

For the “next project” question — if you already did token + voting, I’d do something with roles + money flow + edge cases. Escrow is good. Vesting is good. Even a simple “subscription payments” contract is surprisingly tricky once you think about cancellations, refunds, paused state, etc.

Also don’t ignore the frontend if you’re from React. A small UI that shows contract state properly (and handles failure cases) already makes it look more real than 10 Solidity-only repos.

Adding to what @ChainMentorNaina said about not chasing “complex,” and what @jolly-soap said about making a repo easy to review — I think this is where many junior portfolios either become believable or forgettable.

At this stage, the problem is usually not “I need 3 more blockchain projects.”
It is: can someone open one repo and understand your thinking in 3 minutes?

That is why a smaller project can still look strong if it answers clearly:

• what the contract does

• who can call what

• what can fail

• what you tested on purpose

• what tradeoff you knowingly accepted

So after ERC-20 + voting, I would not rush into a giant DeFi clone just to look more advanced. I’d take one project with roles + money flow + edge cases — escrow, vesting, subscription payments, payout splitting, etc. — and make that repo very easy to trust.

For a junior blockchain developer role, that usually creates a better signal than “more features”:

• clean README

• revert / failure-path tests

• short architecture note

• known limitations

• tiny frontend if your React background is strong

That is the kind of repo where a reviewer feels: “okay, this person may be junior, but they can explain decisions, think about failure cases, and be onboarded.”

One reviewable repo beats three average repos almost every time.

One pattern I keep noticing in junior blockchain portfolios: candidates try to look advanced too early.

After ERC-20 + voting, the next project does not need to be a huge DeFi clone. A better project is usually something smaller where a reviewer can see money flow, roles, failure cases, and testing discipline.

For example, escrow, token vesting, subscription payments, payout splitting, or a simple staking contract can all work — but only if the repo is easy to review.

For a junior blockchain developer portfolio, I’d ask:

• Can someone understand the project in 3 minutes?

• Does the README explain the role of each contract?

• Are failure cases tested, not just happy paths?

• Is there a short note on tradeoffs and known limitations?

• If there is a frontend, does it handle failed transactions clearly?

That is often more hireable than having five tutorial-style repos.

The real question is not “what impressive project should I build next?”
It is: “what project will prove I can think clearly enough to be onboarded as a junior blockchain developer?”

I think the next project matters less than how reviewable the project becomes.

When I see juniors say they built ERC-20, voting, NFT mint, marketplace, staking, etc., the first doubt is not always “is this advanced enough?” The doubt is usually “can I understand what this person actually owned?”

For me, a small escrow or subscription payments project can be stronger than a fake DeFi clone if the repo shows:

who can call what

what happens when payment fails

what edge cases were tested

what the frontend shows when the transaction reverts

what was intentionally not implemented

That is probably the real answer to how to make a junior blockchain developer portfolio look hireable after ERC-20 and voting dApp projects.

Not bigger. More readable. More explainable. Easier to trust.