Principal Software Engineer (Front-End, React)

Company: Interactive Investor

Location: Manchester

Posted: April 28th, 2026

Title: Principal Software Engineer

Location: Hybrid (3 days a week in Manchester)

Salary: From £75,000

Who we are:

interactive investor is an award‑winning investment platform that puts its customers in control of their financial future.

We’ve been helping investors for nearly 30 years. We’ve seen market highs and lows and been resilient throughout. We’re now the UK’s number one flat‑fee investment platform, with assets under administration approaching £75 billion and over 450,000 customers.

For a simple, flat monthly fee we provide a secure home for your pensions, ISAs and investments. We offer a wide choice of over 20,000 UK and international investment options, including shares, funds, trusts and ETFs.

We also bring impartial, expert content from our award‑winning financial journalists, highly engaged community of investors, and daily newsletters and insights.

Purpose of the Role

The purpose of this role is to support the discovery, design, planning, architecture and development across one or more delivery teams acting as an expert in a defined technical domain.

The role provides technical direction to deliver changes which establish new patterns and architectural designs or significant change to an existing solution in order to meet business objectives.

The principal engineer reports into the Senior Manager and works within areas of technical domain of responsibility, while collaborating with different functions across the organisation on technical solutions. The principal engineer supports the Technical Engineering Manager, by taking the responsibility for change to delegated subsets of the overall technical domain.

The role ensures solutions are successfully transitioned through delivery and into live where they are supported by the broader team.

Responsibilities

Qualifications

Technical Capability

Benefits

Please Note:

We will do our utmost efforts to respond to all applicants. However, due to the high volume of applications we’re currently receiving, if you haven’t been contacted within 30 days of application, please consider unsuccessful.

interactive investor operates in accordance with the UK Equality Act 2010. We welcome applications from individuals of all ages, disabilities, gender identities, marital status, pregnancy/maternity, race, religion or belief, sex, and sexual orientation. We are committed to treating all applicants fairly and making reasonable adjustments where needed to support disabled applicants. We actively prevent all forms of discrimination, harassment, and victimisation—whether direct, indirect, associative, or perceptive.

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