There is a blockchain fintech startup that somehow found my profile and wants to interview me for a senior tech role.

However, I don't understand their business at all, primarily because I don't understand finance and blockchain at all. I have always avoided investing/speculating in bonds, stockmarket, etc. because I'm pretty broke to begin with. I think they would be a huge time sink for no benefit when I don't have leverage. I also have only a very vague idea of blockchain (I have never even read how Ethereum's smart contracts work, for example).

What kinds of questions should I be asking them and myself to consider whether to join that fintech startup or not, assuming I could get an offer?

  • 4
    @SlavaKnyazev: That's only the case as long as they believe they can convince some other sucker to buy it from them. VC is ponzi schemes all the way down. Once the last round of investing suckers fails to find more, they'll try to turn the employees into the next round of suckers to reduce their losses. Commented Aug 20, 2019 at 21:42
  • @Nelson most technology companies are unprofitable in their early lives, yet manage to pay all their employees. In 2018, 81 percent of US companies were unprofitable in the year leading up to their public offerings.
    – OrangeDog
    Commented Aug 21, 2019 at 9:05
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    I joined a finance business without any knowledge of their business. 3 years later, I know just enough to get by and that's enough for me. I don't have any interest in the domain. They pay other people to worry about that stuff. They pay me for my technical skills.
    – Michael
    Commented Aug 21, 2019 at 9:16

5 Answers 5


As other answers have stated, learning the technology isn’t too big a deal; it’ll be like learning any other technology stack.

But while you’re worrying about whether you’re up to the task, remember to do your due diligence in researching whether the “company” itself is up to the task. A “startup” in a buzzwordy field that cold-calls folks without appropriate tech experience in the field makes my spider-sense tingle — how do you know it’s not just two naive knuckleheads living in mom’s basement? Make sure you don’t end up working for free on a project that will never see the light of day.

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    How do you know it's not a scammer... They're practicing in an area that's full of them... Next thing they start some song-and-dance about how employees need to be involved in the system and they're telling you to buy some cryptocurrency and send keys just to prove you're invested... Swish. Commented Aug 19, 2019 at 17:53
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    @Harper My experience in the blockchain space is that there's no clear dividing line between outright scams and good-faith bad ideas. It's the difference between a startup that attracts lots of funding for an idea they know is terrible, and a startup that attracts lots of funding for an idea they don't know is terrible.
    – James_pic
    Commented Aug 20, 2019 at 15:33
  • @Harper-ReinstateMonica good read how even the big, semi-legitimate companies can mess things up -> web3isgoinggreat.com
    – iLuvLogix
    Commented Jun 20, 2022 at 10:30

I co-founded a blockchain company with my friend, without any previous blockchain experience/knowledge, nor investment (I still don't).

But I do know how to write code, how to design a solution on the cloud; most importantly, I can learn a new technology quite quickly - as a modern software engineer, this is pretty much a requirement.

If you can do all these, don't worry about it. Blockchain is pretty easy to learn. Find a good tutorial to follow, craft a few experimental smart contracts and you're good to go - just like learning any other new technology stack.

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    Well, I would still want to know what their business model is, how they are making money (or think they will down the road if they are startup).
    – onnoweb
    Commented Aug 19, 2019 at 19:56
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    This is not good advice, imo, sorry. Blockchain software development is fundamentally different from typical software development. Deploying immutable contracts can be tricky and even established companies/projects have messed this up, even after being independently audited. Writing an ERC20 token or a Hello World smart contract should be relatively easy, but I would hardly say it is "just like learning any other new technology stack." Blockchain means immutable and typically deals with money; if you mess up, it can be a nasty lesson to learn. Commented Aug 19, 2019 at 21:42
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    @rickjerrity, I agree to certain degree. But I disagree with the new tech part. The learning process is the same. Every new technology has its unique attributes, it's part of the learning. Blockchain is immutable, distributed, etc. It is different from other technology (just like any other new tech), but the learning of it is the same. Commented Aug 19, 2019 at 22:58

The number one question you should ask a start-up is how they plan to make money. If you can't figure it out and/or they don't have a plan to get to monetization, that's enough of a red flag to make your decision based wholly on your desired career tracking.

For a tech focused job, you should ask what tools/technology they use and how they plan to place you within their staff. Then compare that with how you want to track your own career.

Finally, compare those two questions and make your decision based on the merits of answering "will they exist long enough for me to move in the direction I want to move?" If the answer is "no," don't consider it.


Immerse yourself in some focused internet searches and read up on the basic foundations of Bitcoin, proof-of-work, blockchain fundamentals, etc... And then after that makes sense read up on derivative works such as Ethereum, et.al. And then go buy a small amount of Bitcoin or Ethereum to try it out and learn how digital wallets work.

If you can follow the high-level math and basic principals of what's explained online - and feel like you would enjoy working this space, then continue on in the interview process. That sort of interview prep will open you up to the most basic and expected questions you can ask back to them, including:

"Can you explain your business model to me?"

Asking that assumes that it's not well defined on their website or has already been stated. If it has, you can ask more specified questions about products, code, customers, reach, etc... Ask how they are going to grow their business from startup to an established firm.

If you like their answers, then it might be worth a shot.

Update - I had a comment under the original question above about avoiding any discussion with this potential employer regarding your financial status. It appears to have been removed. Not sure why, so I'll restate it here: Avoid telling any company involved in finance about your own financial situation ("broke" - your own words). This is probably good advice for any interview, but I had one friend lose his job at a bank for having bad credit. I wouldn't want you to walk into an interview and start off on the wrong foot.


It's not an absolute necessity to understand the business. From the sounds of it, they didn't reach out to you because of your expertise in fintech or blockchain. Do some high level reading up on the company, what they do, what markets they serve and do some high level reading on block chain so that you at least have some idea of the domain in which they operate. If you're interested in either fintech or blockchain then this may be a good opportunity for you to get your feet wet and start gaining some experience and knowledge in both.

If you're offered and if you accept a job then you can dig more deeply into the company, their market, and the technology they use to serve that market. The more you know about these the better you can serve the company in your role.

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    The difference is this is a startup. For a public company, you don't need to understand it. Or a private company that isn't going to give you an equity grant. But for a startup, who will likely pay in a mix of cash and stock, you need to understand the business model to make a reasonable analysis of what the risk is on the equity grant. Commented Aug 19, 2019 at 17:14

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