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You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

Let’s say that your company is running a standard control and variant AB test on a feature to increase conversion rates on the landing page. The PM checks the results and finds a .04 p-value.

How would you assess the validity of the result?

Experiment Validity

Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.

What factors could have biased this result, and what would you look into?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

Harrington Starr Salaries by Position

Senior Data Engineer | Innovative Fintech Startup | Bristol/London/Remote | £70,000 - £80,000 We have a Senior Data Engineer opening for a disruptive fintech startup who are changing the landscape when it comes to investor technologies. This position can be operated remotely but will also require attendance to the Bristol office once a month for a company get together. For those who enjoy in office collaboration, you are welcome to work from the London or Bristol offices whenever you like. All candidates must have the right to work in the UK for this position. What are we looking for?<ul><li>Designing, implementing and maintaining automated data pipelines using Python and AWS </li><li>Implementing processes to test data validity, latency and coverage </li><li>Building and maintaining software infrastructure for use across the company </li><li>Monitoring, triaging and fixing issues alongside fellow Engineers </li><li>Taking new ideas from inception through to implementation across our tech stack </li><li>Mentoring other Engineers to help them achieve their full potential </li><li>Contributing to the development of internal gRPC APIs & Go services</li><li>Developing internal frontends written in React</li></ul> Our client are looking to move quick on this so please apply today or get in touch with me for more information at sean.kennedy@harringtonstarr.com

C++ Developer - Financial Exchange This is a brand new position in a large and established financial exchange. You will be using your experience to work with technical and non-technical stakeholders to understand requirements, then design, build and implement new financial risk models. This is a heavily technology-focussed firm with a number of highly skilled engineers working across all different aspects of the exchange platform, however this role is brand new and so the ability to work independently is required, along with the confidence to engage with other teams and team members to investigate problems and find solutions collaboratively. <ul><li>Strong skills in design and C++ application development absolutely required. (At least 4 years)</li><li>Strong appreciation for testing and ideally experience working in a TDD way is needed. </li><li>Experience in STL, Boost, multithreading, concurrent systems</li></ul> This firm care a lot about performance, low latency, high throughput and the challenges it presents – so should you. This is a truly welcoming and inclusive business who love to take talented engineers and make them better. You will be welcomed into a collaborative and friendly working environment.A great opportunity to make your mark in financial technology, learning from the best. Contact Ciara Clarke at Harrington Starr for a confidential discussion on this role.

Senior Software Engineer – C# .Net / React - Chicago Be part of the Future of Finance Tech! Why should you join this company?Join the revolution with a finance powerhouse that's been setting industry standards for three decades. They don't just offer a job; they provide a launchpad for your career with top-tier salaries and bonuses – because your talent deserves nothing less. Plus, enjoy funded certifications, hybrid working in the heart of Chicago, and a plethora of perks that redefine work-life balance. What's in It for You?<ul><li>Dive into thrilling projects where you shape the next era of software solutions.</li><li>Collaborate with a dynamic team, influencing the very fabric of tech architecture.</li><li>Stay ahead of the curve, embracing innovation seamlessly.</li><li>Engage directly with business users, transforming their needs into top-tier systems.</li><li>Build groundbreaking fintech solutions that redefine industry standards.</li><li>Be the embodiment of our highest integrity standards – your values matter here!</li></ul> What We Seek:<ul><li>Superb skills in C# and .Net – your expertise is the backbone of our success.</li><li>Familiarity with JavaScript, TypeScript, React, NodeJS, or Docker.</li><li>A natural communicator with an insatiable hunger for learning.</li><li>Proficiency in Test-Driven Development (TDD).</li><li>Cloud experience, preferably with AWS.</li><li>Hands-on knowledge and skills gained from working in the clearing and settlement process of financial transactions.</li></ul> Perks That Set Them Apart:<ul><li>Competitive salary: up to $250,000, experience-dependent.</li><li>Funded certifications and subscriptions to keep your skills on the cutting edge.</li><li>Comprehensive medical, dental, and life insurances for you and your family.</li><li>Generous holidays, plus extra time off for impactful charity work.</li><li>Hybrid working model in our central Chicago office.</li><li>Exciting bonus structures to reward your exceptional contributions.</li></ul> Want to learn more?Connect with Con Lam at Harrington Starr - 07360 532134, hit the apply button below, or link up via LinkedIn for a confidential conversation.

Software Engineer – Javascript / Typescript / React Salary: Up to £140’000 – plus bonus React, JavaScript, TypeScript, React Framework, NextJS, Azure, Kubernetes, Docker, Digital Investments. SQL, Harrington Starr has partnered with an innovative Digital Investment & Crypto Currency house that specialise in developing unique software systems for Crypto Trading, Risk Management and Data Systems are now in the market for a JavaScript TypeScript Software Engineer with experience using React Framework. This is an exciting opportunity to join and Lead the Software Development lifecycle for Crypto Trading and Risk Management within the organisation. This is a Greenfield project and we are looking for a Hands on Software Engineer where you will utilise the JavaScript ecosystem. This organisation are developing cutting edge web-systems, which are being used globally and are offering the opportunity for you to play a pivotal role within the full software development life cycle. Key requirements within this opportunity are as follows:<ul><li>Solid experience with JavaScript and TypeScript</li><li>Experience with React Framework</li><li>Experience with Azure Cloud</li><li>Experience with Kubernetes and Docker.</li><li>Experience within Crypto Currency or/and Risk Management.</li><li>Any experience with Digital Investments.</li><li>A 2:1 or above in Computer Science - Required</li></ul>A leader within their community and a specialist Development team already in place, due to recent success they are looking to further build out their Software Engineering team in their London Office. You will be working on cutting edge platforms for Trading and analytics for Digital investments & products. If you feel you are ready to take the next step of your career then please apply via Link

Harrington Starr Interview Questions

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Harrington Starr Interview Questions

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