# Fintech internship portfolio: one piece that proves your skill and reveals no secrets

> **The short answer**: A fintech internship portfolio needs one strong project: a small piece built on invented data, such as a loan-instalment calculator or an expense categoriser, with a one-page write-up covering the problem, method, result and limits. Leave out customer data, any firm’s figures and screenshots from earlier training systems.[^1][^2]

**Key takeaways**

- One finished piece beats five thin ones.
- Build it on data you invented and label it as sample data.
- Write its page as a case study: problem, method, result, limits.
- Run a privacy check last and remove anything that points to a firm or a person.

![Diagram: one portfolio piece from question to privacy check](https://tiswa.app/assets/blog/fintech-internship-portfolio/fintech-internship-portfolio-cover-en.webp)

Picture an accounting student who hands in a portfolio with a spreadsheet of real customers and their balances, because a supervisor at a summer placement let them “practise on it”. The work looks excellent. It can never be shown, not in a file, not in an interview, not behind a link. That is the real difficulty with a fintech portfolio: nearly everything you learn on the job is protected, so what you can show is what you built yourself.

> **tiswa's take**: Many students think a portfolio is only complete with numbers from a real firm. It is the other way round. A clean piece on invented data tells a reader you know where publishing stops, and that is a skill anyone working near money is looking for.

## What is a fintech internship portfolio?

It is one or two pages, or a small site, showing one to three pieces of work that reveal how you handle numbers, data and financial products. Nobody expects a banking system from a student. A reader wants to see that you can name a problem, build a small solution, explain your choices and say where your solution stops. The US employer association NACE lists critical thinking, problem solving, communication and technology among its career readiness competencies.[^1] A good portfolio shows at least two of them on one page.

This differs from a [general portfolio](https://tiswa.app/en/blog/build-a-portfolio/) that covers your whole major. A fintech portfolio is narrower and serves a single reader: someone deciding whether you understand money and data together.

## Which piece belongs in a fintech portfolio?

Pick something that sits where two things meet: a clear financial question and data you can make yourself. Three examples, all of them examples rather than real work:

| Piece | Question it answers | What it shows |
|---|---|---|
| Financing instalment calculator | How much does the monthly payment change if the term grows? | Writing and checking a formula |
| Expense categoriser from a CSV | Where does a student’s monthly allowance go? | Cleaning and labelling data |
| Fee comparison sheet for payment services | Which service costs least for a given transfer size? | Comparing on stated criteria |
| Unusual-transaction flagger | Which transactions deserve a second look? | Simple rules and clear logic |

![Privacy check: Names / Logos / Screenshots / Metadata / Clean export](https://tiswa.app/assets/blog/fintech-internship-portfolio/fintech-internship-portfolio-inline-2-en.webp)


You need no more than a tool you already know: a spreadsheet, Python or a free analysis app. What matters is that your work can be rerun. Anyone opening it should see the steps, not only a polished screenshot.

## How do you build a piece on invented data?

1. **Write the question in one sentence**: “How much does the monthly payment rise if I extend the term by a year?” If you need a paragraph to explain the question, it is too big.
2. **Invent the data and say so**: Generate two hundred rows with realistic ranges and put a line at the top: sample data, invented, not about any person or firm.
3. **Solve it with the simplest tool**: Try two columns and a pivot table before reaching for machine learning. A simple answer you can explain beats a complex one you cannot defend.
4. **Check one result by hand**: Work one row out yourself and compare it with what your sheet produced. Say on the page that you did.
5. **State the limits**: What does the piece leave out? Perhaps taxes or exceptions. Admitting limits raises trust.

![Case study flow: Question / Invented data / Method / Limits](https://tiswa.app/assets/blog/fintech-internship-portfolio/fintech-internship-portfolio-inline-1-en.webp)


## How do you write the piece up as a case study?

Four sections are enough. The problem in two sentences. The method in five to eight sentences with one image of the table or chart. The result, using the numbers your invented data produced, and clearly marked as such. Then the limits. Put one line at the top: your role, the tool and how long it took. Purdue’s writing lab teaches that a good document is shaped for a specific reader and arranged so it can be scanned quickly.[^2] Your portfolio is no exception, since whoever opens it will skim for a minute before deciding to read.

Write in direct verbs: “I calculated”, “I sorted”, “I compared”. Drop the adjectives. “Analysed 200 sample rows and grouped them into six categories” beats “an innovative, professional project”. The same wording helps in the projects section of your [student CV](https://tiswa.app/en/blog/cv-for-students/).

## How do you get an internship in Saudi Arabia without showing confidential work?

Before publishing, open each page and ask whether anything points to a person or an organisation. The checks we use:

| Check | Remove or replace with |
|---|---|
| Client names, account numbers, phone numbers | Fully invented data |
| Logos of a firm you trained at, or names of its systems | A general description: “an internal booking system” |
| Screenshots of work tools | A diagram you drew from scratch |
| Real figures about a firm’s size or revenue | Ranges from your own scenario, marked as hypothetical |
| Metadata inside files and images | Export a fresh, clean copy |

If you are unsure, ask your supervisor one question: “May I show this?” The answer is yes or no, and there is nothing to guess. The organisation’s rules decide, not your judgment. To prepare for the interview question about your project, read [how to explain your project in an interview](https://tiswa.app/en/blog/coop-interview-explain-project/).

## How do you apply for an internship in Saudi Arabia with this portfolio?

A two-page PDF is enough for applications, and a public page is enough if you want more. Keep the code or spreadsheet somewhere it can be opened, and put a single link in your CV. If your major is finance, check what employers ask for in [finance training skills](https://tiswa.app/en/blog/finance-coop-training-skills/), and put the same link on your [LinkedIn profile](https://tiswa.app/en/blog/linkedin-internship-profile/).

Test the link from a phone without logging in. If it asks for an account, nobody will open it. And rename the file so it carries your name and the piece, not “final2”.

Many analysis and design tools you will need for your piece have student pricing. Browse the [student deals](https://tiswa.app/en/deals/) before you buy anything. [Browse student deals](https://tiswa.app/en/join/)

## Questions

### What goes in a fintech internship portfolio?

One to three pieces on invented data, each with a page covering the problem, method, result and limits. One polished piece matters more than the count.[^1]

### Can I show work from a previous internship?

Not without explicit permission from the organisation. Safer to build a new piece on invented data that shows the same method with no detail about the firm.

### How do I get an internship in Saudi Arabia in finance?

Start from the postings and your college training office, then send an application that points to one finished piece. Our [finance training guide](blog/finance-coop-training-skills/) lists the skills those postings tend to ask for.

### Can I do an internship in Saudi Arabia as a student?

Your university and the host organisation set the conditions, so ask your college training office before you apply. A portfolio helps in either case because it shows what you can do before you have a placement.

### How do I know my data reveals nothing?

Check every page, screenshot and file against the privacy table above, and export a fresh clean copy before publishing.[^2]

### How do I apply for an internship in Saudi Arabia?

Follow the application route the host organisation publishes, and attach a two-page PDF of your portfolio only if the posting allows attachments. Tailor the one-line summary of your best piece to the role.


## Sources

[^1]: NACE: career readiness competencies, https://www.nace.org/career-readiness/competencies/
[^2]: Purdue OWL: resumes and CVs, https://owl.purdue.edu/owl/job_search_writing/resumes_and_vitas/index.html
[^3]: Saudi Ministry of Education, https://www.moe.gov.sa/en/Pages/default.aspx