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Hi, I'm Felicity Lilley, a Senior Software Engineer with extensive experience in backend and frontend development, primarily focusing on building robust, scalable solutions that enhance user experience and drive business outcomes. I've worked with a diverse range of technologies including PHP, Java, Python, and cloud services like AWS. I enjoy collaborating with cross-functional teams to design and deploy impactful features. My background spans companies like Etsy and Fidelity Investments, where I led major projects from payment systems to personalized financial planning applications. I’m passionate about continuous learning and mentoring others, and I’m always eager to tackle new software challenges while ensuring high-quality and maintainable code.…Hi, I'm Felicity Lilley, a Senior Software Engineer with extensive experience in backend and frontend development, primarily focusing on building robust, scalable solutions that enhance user experience and drive business outcomes. I've worked with a diverse range of technologies including PHP, Java, Python, and cloud services like AWS. I enjoy collaborating with cross-functional teams to design and deploy impactful features. My background spans companies like Etsy and Fidelity Investments, where I led major projects from payment systems to personalized financial planning applications. I’m passionate about continuous learning and mentoring others, and I’m always eager to tackle new software challenges while ensuring high-quality and maintainable code.

Felicity Lilley

Developer, Programmer, Full Stack Developer, +4

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Hi, I'm Felicity Lilley, a Senior Software Engineer with extensive experience in backend and frontend development, primarily focusing on building robust, scalable solutions that enhance user experience and drive business outcomes. I've worked with a diverse range of technologies including PHP, Java, Python, and cloud services like AWS. I enjoy collaborating with cross-functional teams to design and deploy impactful features. My background spans companies like Etsy and Fidelity Investments, where I led major projects from payment systems to personalized financial planning applications. I’m passionate about continuous learning and mentoring others, and I’m always eager to tackle new software challenges while ensuring high-quality and maintainable code.…Hi, I'm Felicity Lilley, a Senior Software Engineer with extensive experience in backend and frontend development, primarily focusing on building robust, scalable solutions that enhance user experience and drive business outcomes. I've worked with a diverse range of technologies including PHP, Java, Python, and cloud services like AWS. I enjoy collaborating with cross-functional teams to design and deploy impactful features. My background spans companies like Etsy and Fidelity Investments, where I led major projects from payment systems to personalized financial planning applications. I’m passionate about continuous learning and mentoring others, and I’m always eager to tackle new software challenges while ensuring high-quality and maintainable code.

Available to hire

Hi, I’m Felicity Lilley, a Senior Software Engineer with extensive experience in backend and frontend development, primarily focusing on building robust, scalable solutions that enhance user experience and drive business outcomes. I’ve worked with a diverse range of technologies including PHP, Java, Python, and cloud services like AWS. I enjoy collaborating with cross-functional teams to design and deploy impactful features.

My background spans companies like Etsy and Fidelity Investments, where I led major projects from payment systems to personalized financial planning applications. I’m passionate about continuous learning and mentoring others, and I’m always eager to tackle new software challenges while ensuring high-quality and maintainable code.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Software Engineer, Checkout at Etsy

January 1, 2022 - June 7, 2024

Collaborated with cross-functional teams including Product, Design, Analytics, ML, and Legal to design and implement robust checkout features that enhance user experience and business impact. Delivered and deployed new features and enhancements in a complex monolithic PHP codebase, ensuring maintainability, scalability, and alignment with business goals. Key contributions include developing solutions to comply with French VAT laws and improving payment method defaults to enhance checkout efficiency. Conducted comprehensive testing, experimentation, and performance monitoring to safeguard millions of dollars in daily transactions across multiple devices, countries, languages, and currencies.

Senior Software Engineer at Fidelity Investments

January 1, 2018 - December 31, 2022

Led the development of a new Java application to generate personalized and optimized retirement plans rapidly, enabling scalable financial advice. Partnered with the methodology team to define requirements, prioritize features, and ensure result accuracy. Created and deployed AWS Lambda functions as part of a serverless money transfer service. Mentored junior developers and enforced coding standards.

Software Engineer at Curata

January 1, 2015 - December 31, 2018

Contributed to full-stack development using Backbone.js, Python Flask, and PostgreSQL. Developed the reporting layer of a new data pipeline that transformed millions of records from diverse sources into actionable insights. Assisted in onboarding and training new developers on the codebase and processes.

Software Engineer at Avanade (at William Hill)

January 1, 2014 - December 31, 2015

Developed an updated centralized payment service responsible for processing millions of dollars in credit card payments effectively and securely.

Senior Software Engineer, Checkout at Etsy

January 1, 2022 - June 21, 2024

Collaborated with cross-functional teams including Product, Design, Analytics, ML, and Legal to design and implement robust features that improve user experience and meet business goals. Delivered and deployed new features and enhancements within a complex monolithic PHP codebase ensuring maintainability and scalability. Developed user-facing features such as streamlined processes for VAT-related item unavailability and smarter defaults for payment method selection. Conducted comprehensive testing, experimentation, and performance monitoring to safeguard millions of dollars in daily transactions across multiple devices, countries, languages, and currencies.

Senior Software Engineer at Fidelity Investments

January 1, 2018 - December 31, 2022

Led development of a Java application for generating optimized retirement plans within seconds to enable personalized financial advice at scale. Partnered with the methodology team to define requirements, prioritize features, and ensure accuracy. Created and deployed AWS Lambda functions within a serverless money transfer service. Mentored junior developers and upheld coding standards across projects.

Software Engineer at Curata

January 1, 2015 - December 31, 2018

Contributed to full-stack development using Backbone.js, Python Flask, and PostgreSQL. Developed the reporting layer of a data pipeline transforming millions of records from disparate sources into actionable insights. Assisted in training new developers on the codebase and team processes.

Software Engineer at Avanade (at William Hill)

January 1, 2014 - December 31, 2015

Developed an updated centralized payment service responsible for processing millions of dollars in credit card payments.