Page 3 | Python Jobs in Harrow

377 Available Jobs for "python"

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Jobleads-UK

Design and maintain backtesting infrastructure

External

← all rolesseniorFull-timeOpen roleArithmosData / Quant EngineerBuild the back-testing engine and portfolio-construction intelligence that every Arithmos claim depends on.London...

Harrow

Any

Created a day ago

Jobleads-UK

Sr. Site Reliability Engineer/ SWE

External

About UsVisa is a world leader in payments technology, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200...

Ham

Any

Created a day ago

Searchability NS&D

Senior AI/ML Engineer

External

Job DescriptionNew Permanent Opportunity for a Senior AI/ML Engineer in Greater London Must hold active clearance – SC or MoD DV Up to £95k DoE plus bonus 4 days on site in...

Brentford

Any

Created a month ago

Harnham

Research Engineer - Customer Feedback AI Scaleup

External

Want to work on NLP problems where model quality genuinely matters?Interested in building and evaluating production transformer models rather than simply orchestrating...

Watford

Any

Created 5 days ago

17918

Lecturer Electrical and Electronic Engineering

External

Lecturer Electrical and Electronic Engineering 28.8 hours per week, 52 weeks per year working days are Monday - Thursday Actual salary in the range of £26,743 - £37,294 per annum...

Uxbridge

Any

Created 5 days ago

Your Tech Future

Data Annotation & Tooling Engineer

External

Data Annotation & Tooling Engineer Location: Remote (UK)Salary: DOEAbout the Role We're looking for a Data Annotation & Tooling Engineer to help build the high-quality datasets...

South Ruislip

Any

Created 4 days ago

Your Tech Future

Data Annotation & Tooling Engineer

External

Data Annotation & Tooling Engineer Location: Remote (UK)Salary: DOEAbout the Role We're looking for a Data Annotation & Tooling Engineer to help build the high-quality datasets...

Watford

Any

Created 4 days ago

Your Tech Future

Data Annotation & Tooling Engineer

External

Data Annotation & Tooling Engineer Location: Remote (UK)Salary: DOEAbout the Role We're looking for a Data Annotation & Tooling Engineer to help build the high-quality datasets...

Southall

Any

Created 4 days ago

LT Harper Recruitment Group

Senior Offensive Security Consultant

External

Senior Offensive Security Consultant - Remote - Travel to office once a month - Up to £60K (Depending on experience) My client is looking for a Senior Offensive Security...

Watford

Any

Created 10 days ago

17918

Fundraising Data & Insight Lead

External

The Role We are looking for a fixed-term (12 months) Fundraising Data and Insight Lead to help National Deaf Children's Society to maximise and diversify our income streams. You...

Clerkenwell

Work From Home

Created 3 days ago

17918

Quality Engineering Manager

External

Quality Engineering Manager Location: London - Hybrid Salary: £65,000 - £75,000 We are seeking an experienced Quality Engineering Associate Manager to join a growing Quality...

Hillingdon

Any

Created a day ago

17918

Entry Level Data Consultant No Experience Required

External

This is a self-funded career programme with a guaranteed job on completion or 100% of your course fees back Train. Certify. Get Hired. Are you looking to start a career in data...

Hillingdon

Any

Created a day ago

Synthires

Physics Specialist (Remote | $61–$77/hr)

External

Research Physics ExpertLocation: RemoteEngagement Type: Hourly ContractCompensation: $61–$77/hourAbout the OpportunityThis opportunity is for experienced Physics Researchers...

Watford

Any

Created 10 days ago

Synthires

Physics Research Scientist (Remote | $61–$77/hr)

External

Research Physics ExpertLocation: RemoteEngagement Type: Hourly ContractCompensation: $61–$77/hourAbout the OpportunityThis opportunity is for experienced Physics Researchers...

Watford

Any

Created 10 days ago

17918

Entry Level Data Consultant No Experience Required

External

Entry Level Data Consultant No Experience Required From £30,000 - £65,000. This is a self-funded career programme with a guaranteed job on completion or 100% of your course fees...

Ealing

Any

Created 4 days ago

External

Design and maintain backtesting infrastructure

Jobleads-UK

AnyHarrow

Harrow

Any

Posted a day ago by Jobleads-UK

Job Description

← all rolessenior

Full-time

Open role

Arithmos

Data / Quant Engineer

Build the back-testing engine and portfolio-construction intelligence that every Arithmos claim depends on.

London (hybrid) or Remote (UK/EU) Full-time £200,000–£220,000 base

1.5%–2.0% equity
performance bonus

About Arithmos

Arithmos is building the retail layer for direct indexing. We turn a plain-English idea into a transparent, rule-based portfolio with institutional-grade backtesting and analytics. Our goal is to make structured investing accessible to millions.

The role

You will build the core intelligence layer of Arithmos. Every index, every backtest, and every performance claim depends on the accuracy and robustness of your work.

What you’ll do

Design and maintain backtesting infrastructure

Historical simulations across equities
Handling corporate actions, survivorship bias, rebalancing

Build portfolio construction logic

Weighting systems (equal-weight, factor-based, custom rules)
Constraint handling (sector, geography, liquidity)

Develop performance and risk metrics

Volatility, drawdowns, Sharpe/Sortino
Benchmark comparisons (S&P 500, custom benchmarks)

Improve data pipelines

Pricing data ingestion
Cleaning, validation, and consistency checks

Work closely with product

Ensure outputs are accurate, explainable, and trustworthy

Requirements

3–8+ years in quant, data engineering, or systematic investing
Strong Python (NumPy, Pandas)
Deep understanding of portfolio construction, backtesting pitfalls, and financial data structures
Experience working with large datasets efficiently