Senior Software Engineer - Trading

Hargreaves Lansdown; Ruislip; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading investment platform in the UK is seeking a Senior Software Engineer to join their trading team and help develop modern web products using technologies like PHP and TypeScript. The role involves working on a wide array of web applications, ensuring the delivery of reliable and high-performing solutions. A collaborative spirit and eagerness to learn are essential for success in this environment, which also promotes continuous improvement and innovation.

Benefits

Discretionary annual bonus

25 days holiday plus bank holidays

Flexible working options

Enhanced parental leave

Pension scheme up to 11% employer contribution

Private medical insurance

Confidential mental health support

Fitness provider access

Inhouse barista and deli

Two paid volunteering days per year

Qualifications

• Proficient knowledge of PHP, particularly in a Linux/Apache/MariaDB stack.
• Experience developing scalable web applications with databases.

Responsibilities

• Writing high quality code adhering to team standards.
• Collaborating to deliver new features for the business.
• Ensuring solutions are reliable, secure, performant, and maintainable.

Skills

PHP

TypeScript

HTML

CSS

JavaScript

OOP principles

RESTful API development

Tools

Linux

MariaDB

Symfony

GitLab

Job description

Overview

Excited to grow your career? Our purpose is to make it easy for people to save and invest for a better future. We are looking for great people to join us, so please come and invest in YOUR future at Hargreaves Lansdown. We know that sometimes people can be put off applying for a job if they don't tick every box. If you're excited about working for us and have most of the skills or experience we're looking for, please go ahead and apply. We’d love to hear from you!

About the role

Join HL and be part of the team, building software for the UK’s largest investment platform. Hargreaves Lansdown (HL) – the UK’s number one platform for private investors, trusted by 1.9 million clients with over £155 billion in savings and investments. For over 40 years, HL has been helping people save and invest for a better future, earning over 200 industry awards, including Best Investment App and Best for Customer Service in 2024. Our solutions are used daily by millions of clients, helping to power the operations of a leading financial institution. Our culture is built on innovation, knowledge sharing, and continuous improvement—and we're looking for talented engineers to join a team developing web (and mobile) products using PHP, TypeScript and AWS. We are looking for a Senior Software Engineer to help support our dedicated, friendly and growing Trading Team to deliver critical new functionality to our clients and internal users. If you enjoy working with clean architecture, modern technologies, and being part of a supportive team that learns from each other, we’d love to hear from you!

As a Senior Software Engineer at HL, you’ll be joining the development team responsible for HL’s online trading platform; the services that power our award-winning mobile applications as well as several other important internal and external web-based systems. HL has big plans for the future; we want to be at the forefront of client service and experience offered through digital channels. Our online platform and its capabilities are the foundation of this journey and have played a key part in our success to date. While the Linux/Apache/MariaDB/PHP (LAMP) stack is currently what primarily drives our web applications, we are a multi-disciplinary group, transitioning to use various new technologies as part of our digital transformation (Typescript & AWS). You will be working on anything from a small text change on the front-end through to a set of internally or externally facing APIs to support new functionality required across our different platforms. Within this role, you’ll be working closely with a skilled and passionate cross-functional team to deliver improvements and crucial changes to our services in an agile way. You will have the opportunity to be instrumental in shaping and delivering large scale systems projects. Therefore, the ability to develop modern, scalable, secure, high performant applications is imperative. You should also embrace a culture that focuses on teamwork, rapid learning, and the continuous delivery of valuable software. The ability to collaborate, prioritise team goals over individual goals, maintain a focus on priority tasks and deliver on commitments is essential.

Responsibilities

• Writing high quality code adhering to agreed team and regulatory standards, and the review of others code.
• Working collaboratively with the team to help deliver significant new features for the business.
• Providing engineering support for existing applications when necessary.
• To ensure existing and newly developed solutions are reliable, secure, performant and maintainable.
• Maintaining awareness of current secure coding practices and ensure code produced is in line with these.
• Developing and evidencing automated tests alongside code produced.
• Documenting all solutions produced, to agreed team standards.
• Demonstrating a willingness to learn and further technologies & techniques embraced by development team.
• Cultivating strong working relationships both within working squad and the wider business.

Essential Skills

• Proficient knowledge and understanding of PHP, particularly when developing within a Linux/Apache/MariaDB/PHP stack.
• Knowledge of TypeScript & React Framework.
• Ability to effectively use HTML, CSS, JavaScript, with an understanding of browser support & standards, W3C compliance.
• Understanding of object-oriented programming (OOP) model principles.
• Understanding of web application design patterns.
• Understanding of common web application security vulnerabilities and appropriate mitigations.
• Understanding of PHP frameworks – particularly Symfony.
• Knowledge of PHP templating engines, in particular, Smarty and Twig.
• Have a practical appreciation of database design and working practices.
• Principles of RESTful API development, including structuring, documenting, versioning, testing and stubbing/mocking.
• Experience developing scalable, secure, high performant, database driven web applications.
• Experience developing automated unit tests alongside code, e.g. with PHPUnit, Playwright.
• Knowledge and experience interfacing with Oracle, Apache Solr.
• Experience in working with automation, Continuous Integration and Delivery pipelines. E.g. GitLab
• Third party API services integration experience.
• (Nice to have) Experience working with any of Docker, Kubernetes, AWS.

Why us?

Here at HL, we’re the UK’s number 1 investment platform for private investors, based in Bristol. For more than 40 years we’ve helped investors save time, tax and money on their investments.

What's on offer?

• Discretionary annual bonus * and annual pay review
• 25 days * holiday plus bank holidays and 1-day additional Christmas closure
• Option to purchase an additional 5 days holiday **
• Flexible working options available, including hybrid working
• Enhanced parental leave
• Pension scheme up to 11% employer contribution
• Income Protection and Life insurance (4 x salary core level of cover)
• Private medical insurance*
• Health care cash plans - including optical, dental, and out patient care
• Health screening programme
• Help@hand - confidential support including mental health counselling and remote GP
• Wellhub - unlimited access to fitness providers and wellness coach sessions
• Variety of travel to work schemes with bike storage and shower facilities
• Inhouse barista and deli serving subsidised coffee and sandwiches
• Two paid volunteering days per year

* dependant on role level

** only available to select during our annual benefits window, in November each year

Hargreaves Lansdown is an inclusive employer that values diversity in its workforce. We encourage applications from all individuals without regard to race, religion, gender, sexual orientation, national origin, disability or age.

This role may also be available on a flexible working or part time basis – please ask the Recruitment & Onboarding team for more information.

Please note, we are unable to provide employment sponsorship to candidates.