Update data storage format from annoying Markdown table rows, and automate updating README.md

.github/workflows/lint-and-compile-workflow.yml

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+name: "[ci] Lint and compile source code"
+
+on:
+  push:
+    branches:
+      - "main"
+    paths:
+      - data/**
+  pull_request:
+    branches:
+      - "main"
+    paths:
+      - data/**
+
+jobs:
+  compile:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up OCaml
+        uses: ocaml/setup-ocaml@v3
+        with:
+          ocaml-compiler: 5.1.0
+          cache-prefix: v1
+          dune-cache: true
+
+      - name: Cache OPAM dependencies
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.opam
+            _opam
+          key: ${{ runner.os }}-opam-${{ hashFiles('src/*.opam', 'src/opam.locked') }}
+          restore-keys: |
+            ${{ runner.os }}-opam-
+
+      - name: Set up OPAM environment
+        run: opam init --bare --disable-sandboxing && eval $(opam env)
+
+      - name: Install dependencies
+        working-directory: ./src
+        run: opam install . --deps-only
+
+      - name: Generate the output file
+        working-directory: ./src
+        run: eval $(opam env) && dune exec internships > ../README.md
+
+      - name: Commit and push changes to git
+        run: |
+          git fetch
+          git checkout ${{ github.head_ref }}
+          git pull
+          git add -f README.md
+
+          if git diff --cached --quiet; then
+            echo "No changes to commit."
+          else
+            git config user.name "github-actions[bot]"
+            git config user.email "github-actions[bot]@users.noreply.github.com"
+
+            git commit -m "[bot] auto-update README.md"
+            git push origin HEAD:${{ github.head_ref }}
+          fi
+
+      - name: 'Upload Artifact'
+        uses: actions/upload-artifact@v4
+        with:
+          name: preview-readme-md
+          path: README.md
+          retention-days: 3
+
+      - name: Fetch artifact URL
+        id: artifact
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          ARTIFACT_ID=$(gh api repos/${{ github.repository }}/actions/runs/${{ github.run_id }}/artifacts \
+            --jq '.artifacts[] | select(.name == "preview-readme-md") | .id')
+          echo "url=https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}/artifacts/$ARTIFACT_ID" >> $GITHUB_OUTPUT
+
+      - name: Comment with full artifact link
+        uses: peter-evans/create-or-update-comment@v4
+        if: github.event_name == 'pull_request'
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          body: |
+            ✅ [Download preview-readme-md artifact](${{ steps.artifact.outputs.url }})
+
+

data/README.md

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+# Data Folder
+
+Below is an example of a company without any posted internships
+```yaml
+name: "ABC Capital"
+website: "https://example.com"
+locations: "London, England"
+notes: "they don't make any money"
+roles: []
+```
+Note that the `roles` field is strictly required to be `[]`. However, once internships are posted, instead of keeping the `[]` syntax, it's changed to
+```yaml
+name: "ABC Capital"
+website: "https://example.com"
+locations: "London, England"
+notes: "they might make some money"
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://example.com"
+        label: "C++"
+      - url: "https://example.com"
+        label: "Python"
+  - role_type: "QR"
+    links:
+      - url: "https://example.com"
+```
+with more `role_type` items as applicable. Note that the links have an optional label field; it is not required, and is ideally blank unless there are multiple roles in the same category. See the examples throughout this folder to learn more about the data format. It is very simple.

data/akuna-capital.yaml

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+name: "Akuna Capital"
+website: "https://akunacapital.com/careers#careers"
+locations: "Chicago"
+notes: ""
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://akunacapital.com/job-details?gh_jid=6996427"
+        label: "C++"
+      - url: "https://akunacapital.com/job-details?gh_jid=7055471"
+        label: "Python"
+  - role_type: "QR"
+    links:
+      - url: "https://akunacapital.com/job-details?gh_jid=7055793"

data/ansatz-capital.yaml

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+name: "Ansatz Capital"
+website: "https://jobs.lever.co/ansatzcapital"
+locations: "NYC"
+notes: "Very Small, Citadel Spinoff."
+roles: []

data/aqr.yaml

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+name: "AQR"
+website: "https://careers.aqr.com/jobs/department/university-jobs"
+locations: "Greenwich, CT"
+notes: ""
+roles: []

data/aquatic-capital.yaml

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+name: "Aquatic"
+website: "https://boards.greenhouse.io/aquaticcapitalmanagement"
+locations: "Chicago"
+notes: "Very Small, Citadel Spinoff."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://job-boards.greenhouse.io/aquaticcapitalmanagement/jobs/7990895002"
+  - role_type: "QR"
+    links:
+      - url: "https://job-boards.greenhouse.io/aquaticcapitalmanagement/jobs/7985726002"
+  - role_type: "BizOps (AI/LLM)"
+    links:
+      - url: "https://job-boards.greenhouse.io/aquaticcapitalmanagement/jobs/8071545002"

data/arrowstreet.yaml

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+name: "Arrowstreet Capital"
+website: "https://arrowstreetcapital.wd5.myworkdayjobs.com/en-US/Arrowstreet"
+locations: "Boston"
+notes: "Fully Systematic. Very High PnL per head."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://arrowstreetcapital.wd5.myworkdayjobs.com/en-US/Campus_Careers/job/Boston/Quantitative-Developer-Intern--Summer-2026_R1338"
+  - role_type: "QR"
+    links:
+      - url: "https://arrowstreetcapital.wd5.myworkdayjobs.com/en-US/Campus_Careers/job/Boston/Quantitative-Researcher-Intern--Summer-2026_R1340"

data/belvedere-trading.yaml

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+name: "Belvedere Trading"
+website: "http://www.belvederetrading.com/jobs/"
+locations: "Chicago"
+notes: ""
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://jobs.lever.co/belvederetrading/eddfd030-1b27-46db-9ef6-5b65e1e2484c"
+  - role_type: "QT"
+    links:
+      - url: "https://jobs.lever.co/belvederetrading/ec52b73e-54b8-4f87-909d-a74cb288dc4d"

data/blackedge-capital.yaml

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+name: "Blackedge Capital"
+website: "https://boards.greenhouse.io/blackedgecapital"
+locations: "Chicago"
+notes: ""
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://job-boards.greenhouse.io/blackedgecapital/jobs/4596128005"
+  - role_type: "QT"
+    links:
+      - url: "https://job-boards.greenhouse.io/blackedgecapital/jobs/4590418005"

data/bridgewater.yaml

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+name: "Bridgewater"
+website: "https://www.bridgewater.com/working-at-bridgewater/job-openings"
+locations: "Westport, CT"
+notes: "Ray Dalio's firm. Very unique culture and interviews. Very School Selective."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://job-boards.greenhouse.io/bridgewater89/jobs/7950099002"
+  - role_type: "QR"
+    links:
+      - url: "https://job-boards.greenhouse.io/bridgewater89/jobs/7726966002"

data/campbell-and-company.yaml

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+name: "Campbell and Company"
+website: "https://workforcenow.adp.com/mascsr/default/mdf/recruitment/recruitment.html?cid=2de708e1-c847-43b1-bf0d-0bad30aca014&ccId=19000101_000001&type=MP&lang=en_US"
+locations: "Baltimore, MD"
+notes: "This small 60 employee multi-strat quant firm has an extremely collaborative culture."
+roles: []

data/chicago-trading-company.yaml

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+name: "Chicago Trading Company"
+website: "https://www.chicagotrading.com/search#search-results"
+locations: "Chicago"
+notes: "Very trader led shop. Shares an office with Group One Trading."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://grnh.se/2f36ab9q5us"
+  - role_type: "QT"
+    links:
+      - url: "https://grnh.se/28t263745us"

data/citadel-securities.yaml

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+name: "Citadel / Citadel Securities"
+website: "https://www.citadelsecurities.com/careers/students/internships/"
+locations: "Chicago, NYC"
+notes: "The market making arm of Citadel. The general perception is that the culture tends to be better at Citadel Securities vs Citadel LLC."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://www.citadelsecurities.com/careers/details/software-engineer-intern-us/"
+  - role_type: "QR"
+    links:
+      - url: "https://www.citadelsecurities.com/careers/details/quantitative-research-analyst-intern-bs-ms-us/"
+  - role_type: "QT"
+    links:
+      - url: "https://www.citadelsecurities.com/careers/details/quantitative-trading-intern-us/"

data/citadel.yaml

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+name: ""
+website: "https://www.citadel.com/careers/open-opportunities/students/internships/"
+locations: "Chicago, NYC"
+notes: "The hedge fund side of Ken Griffin's Citadel. The quants are mostly on the Global Quantitative Strategies team (GQS). Citadel tends to be fairly school-selective."
+roles: []

data/cubist.yaml

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+name: "Cubist"
+website: "https://careers.point72.com/?experience=internships"
+locations: "New York City"
+notes: "The quant arm of Steve Cohen's Point72 hedge fund. Pretty small and school selective."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://careers.point72.com/CSJobDetail?jobName=quantitative-software-developer-intern&jobCode=CSS-0011537&location=New%20York&locale=English&retURL=/CSCareerSearch"

data/de-shaw.yaml

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+name: "DE Shaw"
+website: "https://www.deshaw.com/careers/internships"
+locations: "NYC"
+notes: "Tends to be extremely school-selective, mostly recruiting from ivy leagues and similar. Generally considered a top destination for QRs, more so than other roles."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://www.deshaw.com/careers/software-developer-intern-new-york-summer-2026-5521"
+  - role_type: "QT"
+    links:
+      - url: "https://www.deshaw.com/careers/proprietary-trading-intern-new-york-summer-2026-5379"

data/drw.yaml

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+name: "DRW"
+website: "https://drw.com/work-at-drw/category/campus"
+locations: "Chicago"
+notes: "Perception is that DRWers tend to have a good WLB but teams are usually siloed. Known for their PM type culture and relatively fluid roles."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://www.drw.com/work-at-drw/listings/software-developer-intern-3157977"
+  - role_type: "QR"
+    links:
+      - url: "https://www.drw.com/work-at-drw/listings/quantitative-research-intern-3151348"
+  - role_type: "QT"
+    links:
+      - url: "https://www.drw.com/work-at-drw/listings/quantitative-trading-analyst-intern-3141981"

data/five-rings.yaml

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+name: "Five Rings"
+website: "https://fiverings.com/careers"
+locations: "NYC"
+notes: "Extremely school-selective - generally MIT only."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://job-boards.greenhouse.io/fiveringsllc/jobs/4806713008"
+  - role_type: "QR"
+    links:
+      - url: "https://job-boards.greenhouse.io/fiveringsllc/jobs/4563183008"
+  - role_type: "QT"
+    links:
+      - url: "https://job-boards.greenhouse.io/fiveringsllc/jobs/4613451008"

data/flow-traders.yaml

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+name: "Flow Traders"
+website: "https://www.flowtraders.com/careers"
+locations: "NYC"
+notes: "Based in Amsterdam, where there are SWE roles. US internships are for traders. Primary focus is on ETFs. Pay tends be lower than IMC and Optiver. One of the only publicly traded quant funds."
+roles:
+  - role_type: "QT"
+    links:
+      - url: "https://www.flowtraders.com/careers/job-description/7166435"

data/g-research.yaml

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+name: "G-Research"
+website: "https://www.gresearch.co.uk/join-us/graduates/"
+locations: "London"
+notes: "Also hires people out of the US. Very focused on research with a lot of people working on cutting-edge Machine Learning."
+roles: []

data/geneva-trading.yaml

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+name: "Geneva Trading"
+website: "https://www.genevatrading.com/careers-open-positions/"
+locations: "Chicago"
+notes: ""
+roles:
+  - role_type: "QT"
+    links:
+      - url: "https://job-boards.greenhouse.io/genevatrading/jobs/4767553007"

data/gsa-capital.yaml

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+name: "GSA Capital"
+website: "https://www.gsacapital.com/?section=careers&gh_src="
+locations: "NYC"
+notes: ""
+roles:
+  - role_type: "QR"
+    links:
+      - url: "https://boards.greenhouse.io/embed/job_app?for=gsacapital&token=8016006002"
+

data/hap-capital.yaml

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+name: "HAP Capital"
+website: "https://jobs.lever.co/hap-capital"
+locations: "NYC"
+notes: "Another options market maker. Less known than (IMC, Optiver, ...) but well known in the OMM circle."
+roles: []

data/headlands-tech.yaml

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+name: "Headlands Tech"
+website: "https://www.headlandstech.com/careers/"
+locations: "Chicago"
+notes: "Founded by ex-Citadel people. Max Dama works here. Similarly to Ansatz, Aquatic, and Radix, a small firm that is willing to pay more than most competitors. Known to have a large focus on C++, both among QRs and SWEs."
+roles: []

data/hudson-river-trading.yaml

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+name: "Hudson River Trading"
+website: "https://www.hudsonrivertrading.com/careers/"
+locations: "NYC"
+notes: "The Algo Dev role at HRT is essentially Quantitative Research. HRT's culture seems to be pretty similar to JS and pay is similar too. HRT has a bigger focus on ML with their dedicated HRT AI Labs. Known for recruiting UG QRs, and for very collegial culture."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://www.hudsonrivertrading.com/hrt-job/software-engineering-internship-summer-2026-2/"
+  - role_type: "QR"
+    links:
+      - url: "https://www.hudsonrivertrading.com/hrt-job/algorithm-development-quant-research-internship-summer-2026-2/"
+        label: "Algo Dev"
+  - role_type: "QT"
+    links:
+      - url: "https://www.hudsonrivertrading.com/hrt-job/algorithm-trader-quantitative-trader-internship-summer-2026/"
+  - role_type: "Sophomore"
+    links:
+      - url: "https://www.hudsonrivertrading.com/hrt-job/sophomore-internship-summer-2026/"

data/imc-trading.yaml

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+name: "IMC Trading"
+website: "https://careers.imc.com/us/en/student-opportunities"
+locations: "Chicago"
+notes: "Known for a pretty chill, tech-like culture. They're a more systematic OMM."
+roles:
+  - role_type: "SWE"
+    links:
+      - url: "https://www.imc.com/us/careers/jobs/4580810101/"
+  - role_type: "QR"
+    links:
+      - url: "https://www.imc.com/us/careers/jobs/4580808101/"
+  - role_type: "QT"
+    links:
+      - url: "https://www.imc.com/us/careers/jobs/4580757101/"
+  - role_type: "ML"
+    links:
+      - url: "https://www.imc.com/us/careers/jobs/4608584101"
+        label: "ML Research"