Europe's quant hubs: London, Amsterdam, Paris, Zurich, Zug and Dublin compared

Ask where to be a quant in Europe and you will hear "London" by default. The real map is more interesting. Amsterdam's old options trading floor gave rise to Optiver, IMC and, indirectly, Flow Traders. Paris went from exporting mathematicians to keeping them. Zurich and Zug host small, research-heavy offices, and Dublin anchors at least one major trading firm's European presence. The city you pick changes which firms you can work for, what kind of work they do, and how much of your pay you keep after tax.

Last reviewed 2026-10-04. Every figure below is labeled: official (a firm, regulator or tax authority), reported (press), analysis (an independent newsletter or adviser), or self-reported (Levels.fyi, Blind), with the year. Pay and tax rules change often, so treat this as a sourced map for orientation.

London: the deepest pool

London's advantage is density. In March 2026, eFinancialCareers was able to compare the UK entities of 20 electronic trading firms, all of which file salaries and headcount with Companies House. Its headline numbers (reported, 2024 accounts):

• Jane Street paid its UK staff £808k on average, while its LLP members averaged about £14m.
• Citadel Securities paid its average UK employee marginally more than Jane Street.
• Quadrature Capital was the highest payer in the sample, by a wide margin.
• XTX Markets' average employee pay was described as unimpressive by e-trading standards, but its roughly 30 partners took about £19.9m each.

Read these as rough signals: a firm-wide average mixes every function.

The other reason London matters is the style of firm it concentrates. XTX describes itself (official) as an algorithmic trading firm that uses machine learning to produce price forecasts for over 53,000 instruments, with about 300 employees and more than 25,000 GPUs in its research cluster. G-Research, also London-based, describes itself (official) as a quantitative research and technology firm built on machine learning and advanced analytics. So two of the best-known ML-first firms are headquartered in London. The city is also the biggest office for Qube Research & Technologies (QRT): about 490 staff, up 66% in a year, per eFinancialCareers in February 2025 (reported). Our XTX Markets guide covers how that firm hires.

Tax (official, England, 2026/27): 20% to £50,270, 40% to £125,140, and 45% above that. The personal allowance shrinks by £1 for every £2 of income above £100,000, so it is gone entirely at £125,140.

Amsterdam: market making's home town

Amsterdam's cluster has a clear origin story. The European Options Exchange opened in Amsterdam on 4 April 1978, modeled on Chicago's CBOE, and its floor produced Optiver, IMC and, indirectly, Flow Traders. Analyst Rupak Ghose describes Optiver as number one or two in European listed equity derivatives and IMC as holding more than 20% market share in most liquid equity options (analysis: Rupak Ghose, April 2026).

• IMC says (official) it was founded in 1989 by two traders working on the floor of the Amsterdam equity options exchange. It now reports over 2,070 staff across ten offices.
• Optiver was set up in 1986 by traders in the pits of the same exchange, and Flow Traders was launched in 2004 by two former Optiver executives as an electronic market maker specializing in ETFs (analysis: Ghose, 2026). Optiver lists Amsterdam among its offices (official).
• Ghose's April 2026 piece puts Flow Traders at about 660 staff, two-thirds of them at its Amsterdam headquarters, and reports that Optiver's and IMC's profits each grew by more than 30% in 2025, while Flow Traders' profits fell 8% (analysis, 2026).

Smaller names exist too. In a 2022 Blind thread asking which Amsterdam and London firms hire international quants, one reply pointed to Da Vinci Derivatives and Radix in Amsterdam (self-reported, 2022).

What this means for candidates: Amsterdam's core work is market making, especially in options and ETFs, which is why interviews there lean on fast arithmetic, probability, and pricing under pressure. Our Optiver and IMC guides break down those processes, and the market-making games practice the quoting part.

Tax (official and analysis): KPMG's 2026 comparison lists the Netherlands' top income tax rate at 49.5%. The offset for many hires is the expat scheme, usually called the 30% ruling. According to the Netherlands Enterprise Agency (official):

• Eligible employees can receive up to 30% of their wages tax-free for a maximum of 5 years.
• From 1 January 2027 the maximum falls to 27% for rulings that started on or after 1 January 2024. Rulings that started earlier keep 30%.
• You must have lived more than 150 km from the Dutch border for more than 16 of the 24 months before starting, and meet a minimum salary threshold that is indexed every year and rises further in 2027.
• A maximum salary applies, set under the Dutch Standard for Remuneration Act and adjusted annually.

In a 2023 Blind thread about moving from G-Research in London to Optiver in Amsterdam, one commenter estimated that €200k of total pay meant about €140k take-home under the ruling, against roughly 40% tax in the UK (self-reported, 2023). That estimate predates the 2027 cut, and your own number depends on salary, cap and start date.

Paris: from talent exporter to hub

Paris's edge is its mathematics pipeline. Business Insider reported in June 2025 that 13 of the 64 Fields Medal winners have been French, pointed to the École Normale Supérieure and École Polytechnique, and described Paris as having evolved from a quant-talent exporter into a full hedge-fund hub (reported).

The same piece, citing Old Well Labs' analysis of regulatory filings, said QRT's Paris investment staff had grown to 160 from 50 in 2022, and that Point72 and Citadel had more than doubled their Parisian trading staffs since 2022 (reported, 2025). eFinancialCareers put QRT's total France headcount at about 260 in February 2025, making Paris its second-biggest office (reported).

The home-grown anchor is Capital Fund Management (CFM). A December 2025 Business Insider profile (reported) described:

• nearly 450 employees, up from 260 at the end of 2020;
• about 100 researchers, with a target of 15 new doctorates a year, most recruited straight out of PhD programs (typically physics);
• assets of about $21 billion as of September 2025;
• a habit of publishing some research as academic papers.

That is the Paris style: research-led and PhD-heavy. XTX also lists a Paris office (official).

Paris's growth since Brexit is part of the story. Fortune reported in February 2024 that hedge funds such as Citadel and Millennium had opened offices in Paris as a gateway to the EU, while bank executives pushed France to loosen labor laws they saw as limiting their flexibility on headcount (reported, 2024).

Tax (official): France's top income tax bracket is 45% on income above €181,917 (barème for 2025 income). The impatriate regime can soften this for people recruited from abroad. Per the French tax administration, you must have been tax-resident outside France for the previous five years. The regime runs until 31 December of the eighth calendar year after you start, and you can opt for a flat exemption equal to 30% of your pay. Total exemptions are capped at 50% of pay, or alternatively the exemption for work done abroad is capped at 20% of pay.

Zurich and Zug: small, specialist, low-tax

Switzerland's quant scene is smaller and more specialist. eFinancialCareers reported in June 2026 that Citadel Securities' Zurich office was founded in 2019 and initially led by statistician Nicolai Meinshausen. Meinshausen left in 2021 and returned in August 2025 as head of principal research, and the office counts a number of former Google Zurich engineers among its hires (reported). Zug, best known as the center of "Crypto Valley", hosts an IMC office that the firm says (official) explores opportunities in crypto and develops next-generation strategies and software, with more than 70 employees from over 20 nationalities.

Swiss income tax depends heavily on the canton, which makes the Zurich versus Zug choice a real one. KPMG's Clarity on Swiss Taxes 2026 (analysis) gives these maximum income tax rates for a single person with no church tax, combining cantonal capital and federal tax:

On pay, a 2021 Blind thread on tech pay described London salaries as "second only to Zurich" (self-reported, 2021), but that is tech-wide and dated.

Dublin: Susquehanna's Irish hub

Dublin's clearest quant anchor is Susquehanna (SIG). SIG's office list puts Dublin alongside London (and Ra'anana, Israel) in its EMEA region (official). Its Dublin graduate quant trader postings describe hires embedded in trading desks at an office "located in Ireland's Financial Services Centre" (official, 2027 programme). Fortune's 2024 report also named Dublin among the cities competing with Paris for post-Brexit finance jobs (reported).

Tax (official and analysis): KPMG's 2026 table lists Ireland's top income tax rate at 40%. Ireland's expat relief, the Special Assignee Relief Programme (SARP), has been extended to 31 December 2030 (Revenue, Budget 2026). For people arriving in 2026 to 2030, it relieves income tax on 30% of income between €125,000 and €1,000,000. The catch: you must have spent the whole 6 months before arrival as a full-time employee of a "relevant employer", working outside Ireland (Revenue Tax and Duty Manual, March 2026). In practice that points to internal transfers far more than direct outside hires.

Pay and tax side by side

Self-reported pay is noisy, role-specific, and often based on small samples. Here is what Levels.fyi showed for software engineers on 2026-10-04 (self-reported, pre-tax median total compensation):

They say little about traders or researchers, whose bonuses vary more.

And the tax picture, from the official and KPMG sources above:

Headline rates leave out social levies that differ a lot by country, enough to change the ranking, so Amsterdam's 49.5% is not necessarily the highest top marginal rate here. In Ireland, the Universal Social Charge (USC) is 8% on income above €70,044 (official, 2026), which takes Dublin to 48% before PRSI, and SARP relief does not cover USC or PRSI (official). In France, salaries also bear CSG of 9.2% and CRDS of 0.5% (official, verified June 2026), and a single person with reference income above €250,000 owes the high-income contribution (CEHR) of 3% to 4% (official, verified April 2026). In the UK, employees add 2% National Insurance on pay above £967 a week (official, 2026/27). Expat schemes depend on where you lived before, when you started, and your salary, so check eligibility before you count on one.

How to choose

• Pick the work, then the city. Options and ETF market making points to Amsterdam. PhD-style systematic research has a strong Paris cluster. ML-heavy prediction points to London, home of XTX and G-Research, which also has a dense cluster of e-trading firms.
• Compare after tax and after eligibility. A lower gross offer in Amsterdam or Paris can be competitive once an expat regime applies, but only if you qualify, and only for a limited number of years.

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