Find your career at Cassini

Cassini collaborate together to tackle complex challenges, motivate each other to work hard and always celebrate in the success we create as a whole. The team is fun, friendly and dynamic - and are always on the look-out for exceptional individuals to join our growing company - but above all…


We're Curious.


We're Innovative.


We're Entrepreneurial.

We’re always questioning, continuously innovative in our approach to problem-solving and never scared to take the risks needed to succeed and move ahead of the crowd.

At Cassini, not only will you be able to kick start your career, but you’ll get the chance to work with the financial industry’s most talented individuals. 

As a fast-growing company - with offices in London (HQ), New York and Sydney - we look for enthusiastic people who are keen to stretch themselves and adapt to the change around them, as well as taking on new responsibilities rapidly when the needed arises. In all cases, career paths can be flexible based on your goals.

Our current vacancies are shown below for both our London office and New York office. Please take note of the location of the vacancy before you apply. If you see a role below that is fit for you, then we would love to hear from you! 

Cassini is an equal opportunities employer and positively encourages applications from suitably qualified and eligible candidates regardless of sex, race, disability, age, sexual orientation, transgender status, religion or belief, marital status, or pregnancy and maternity. 


product specialist

Based in: London

This new position is based at the Cassini Headquarters in London (Remote working until further notice). You will report to the Head of Product.

Cassini is a small and growing company, so this role requires someone able to adapt and take on new responsibilities rapidly.

Specific Experience / Skills Required

  • Minimum 3 years of OTC Derivatives BA experience
  • Proven ability to document business requirements and produce analysis reports
  • Working knowledge of Windows, Unix and Linux Operating Systems
  • Strong communication and analytical skills
  • Understanding of the entire software development lifecycle
  • Experience working with XML and XML schema, JSON and CSV file formats
  • Experience working on Agile development

You will have proven experience in working with OTC derivatives and preferably good working knowledge of Clearing and ETDs. You will understand Initial Margin requirements and how this impacts different types of trading – Cleared, Uncleared and Exchange Traded Derivatives.

Client Delivery Engineer

Based in: London

This position is based at the Cassini office in London (remote working until further notice). As Cassini is a small but growing company this role requires someone able to adapt and take on new responsibilities rapidly. You will report to the Head of Client Delivery. 

We envisage the ideal candidate to have a technical background and interest in the financial world, particularly capital markets. We offer the ability to gain an in depth knowledge of a deep and complex sector that will create great career opportunities.

Specific Experience / Skills Required

  • Russel group university degree in a technical field (e.g. Data Analytics/Data Science, Finance, Computer Science, Engineering, Physics, or MIS). Min 2.1 or above 
  • Ability to interrogate and manipulate a relational database using SQL
  • Ability to create and manipulate structured data
  • Experience with scripting languages is an advantage
  • Strong communication and analytical skills
  • Proven ability to document system technical and data configurations for external consumption
  • Experience defining, tracking and tracking implementation or similar projects

You will have prior experience in working on software implementation projects, communicating to external stakeholders and data oriented technical skills..

QA Engineer

Based in: London

We are looking for QA Engineer with skills in coding, quality, and testing to join our team. Based at our London office, this person will report to the Head of QA.

You will join the team of hands-on, pro-active, self-motivated, and seasoned QA professionals.

Specific Experience / Skills Required

  • 4+ years of QA testing experience with demonstrable and significant experience in Automation
  • Experience with executing automation tests on CI/CD
  • Experience in working with cloud-based environments (Preferably AWS)
  • Strong experience in Automating frontend, backend and API testing
  • Knowledge of Agile and ability to work in fast-paced environment
  • Experience with tools such as Selenium, Cucumber/Gherkin, Rest Assured, Zephyr, GitLab,
  • Experience with tools such as JIRA and the full lifecycle of user stories and testing

You will have prior experience as QA Engineer, both manual testing and automated testing frameworks. You will have sufficient technical skills to assist with investigation of test defects.

Software developer

Based in: London

The role covers all parts of the development process from prototyping, web GUI development, server-side engine development, testing and deployment.

Specific Experience / Skills Required

  • Russell group university degree in computer science, physics, or engineering. Min 2.1 or above.
  • Minimum two years development experience on enterprise level software system.
  • PYTHON (- inc Pypi, Pip )
  • Java, JavaScript, CSS, Distributed Processing Patterns
  • RabbitMQ or similar MQ messaging protocol
  • SQL and data modelling
  • Modern development frameworks, including Bootstrap, SQLAlchemy, Flask, Backbone
  • Algorithm development/implementation
  • Agile development model

Useful is experience with cloud and docker based deployment (Docker containers, Amazon Web Services deployment and configuration, ECS)

Sales executive

Based in: New York

This role covers the US and Canada. The role may involve occasional travel around the US and to the UK for company meetings etc. 

Key responsibilities will be prospect research, lead generation, and organizing sales meetings (both virtual and in person). 

Whilst the role will include the opportunity to assist in closing sales, the main focus is on generating new sales opportunities.

Specific Experience / Skills Required

  • Knowledge and experience of OTC derivatives and the trading lifecycle preferred, specifically Interest Rate, FX, and Credit products.
  • Knowledge and experience in Capital Markets sales essential.
  • Experience of technology sales and/or SaaS solutions.
  • Ability to work independently and be self-directed.
  • Bachelor’s degree in business, systems or similar discipline.
  • Excellent oral and written communication skills as well as organizational skills.
  • Proven ability to cold call and generate sales leads.


  • Experience with Margin, Collateral, and Financing functions.
  • Experience with Front Office workflows and trading systems.
  • Sales related experience with asset managers/hedge funds (the ‘buy-side’). 
  • Understanding of regulatory developments in the margin space (i.e. EMIR / Dodd Frank Act), especially central clearing for OTC products.