Senior Software Engineer

FX Digital; Greater London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A specialist Connected TV agency is seeking a Senior Software Engineer to lead technical solutions for innovative user experiences across mobile and large screen devices. The role requires 5+ years of experience in application development, a strong command of TypeScript and Javascript, and excellent leadership skills. You will collaborate with cross-functional teams and mentor junior developers while delivering engaging solutions for high-profile clients. The position is full-time, and the work environment is located in Old Street, London, demanding at least three days a week in the office.

Benefits

MacBook Pro on start

Annual profit share

Pension contributions

Generous annual leave

Mental health coaching

Health Insurance options

Cycle-to-work scheme

Flexible start time

Employee referral scheme

Weekly training time

Diversity and inclusion culture

Monthly Show and Tell

Qualifications

• 5+ years of professional experience in front-end or full-stack application development.
• Expert knowledge of TypeScript and the Javascript eco-system.
• Solid grasp of web architecture and transfer protocols.

Responsibilities

• Engineer and develop user experiences for mobile and large screen devices.
• Lead technical solutions for Connected TV and smart devices.
• Mentor team members and improve their skills.

Skills

TypeScript

Javascript eco-system

RESTful APIs integration

Unit testing frameworks

Debugging tools

Leadership

Time-management

Communication

Education

Bachelor’s degree in Computer Science or related field

Tools

CLI tools (e.g., yarn, npm)

Job description

Role

Senior Software Engineer

About FX Digital

FX Digital is a specialist Connected TV agency, providing a wide range of services, including Product Strategy, Design, Engineering, and Test Automation. We partner with global streaming brands such as Discovery+, BritBox, ATP Media, ITV, and Dyn.

As a Senior Software Engineer at FX Digital, you take a leading role in shaping the technical direction of our Connected TV and living room experiences.

With your extensive experience in application development and web technologies, you will lead technical solutions, mentor team members, and deliver engaging user experiences for large screen devices.

Key Responsibilities

• Engineer and develop responsive, fluid, and data driven user experiences for mobile and large screen devices
• Lead technical solutions for Connected TV, mobile and interactivity across smart devices
• Contribute to product development initiatives that reach hundreds of thousands of users
• Collaborate with product, design, and QA to understand customer needs and structure work for efficient delivery
• Provide technical guidance and inspire the development team to deliver optimised, reliable, and maintainable code
• Mentor team members, supporting them to improve their craft and grow their impact
• Implement tools and processes that support the team’s continuous delivery of value to users
• Provide technical insight in customer meetings, presenting solutions and advising on architectural decisions
• Collaborate with sales and marketing teams to present technical solutions to prospective clients
• Stay current with industry developments by attending relevant events and training to maintain cutting-edge skills

Requirements

• 5+ years of professional experience in front-end or full-stack application engineering / development
• Expert knowledge of TypeScript and the Javascript eco-system
• Extensive experience integrating with RESTful APIs, unit testing frameworks, and debugging tools
• Solid grasp of web architecture, including APIs, transfer protocols, and browser internals
• Proficiency with CLI tools (e.g., yarn, npm) and some familiarity with CI/CD pipelines
• Strong leadership, time-management, and communication skills

Desirable Skills

• Passion for efficient code, performance optimisation, and pushing limits of constrained devices
• Experience with video/audio player playback (e.g., hls.js), video delivery protocols, DRM
• Experience with WebGL, RxJS, and stream-based programming
• Experience in one or more native and cross-platform development environments Android/Google TV/Kotlin, or iOS/tvOS, React Native
• Bachelor’s degree in Computer Science, Mathematics, or a related field (or equivalent experience)

Why work at FX?

• MacBook Pro on your first day at FX
• Annual profit share distributed equally across all roles and departments
• Pension contributions with Nest pensions
• Generous 35 days of annual leave, including bank holidays and Christmas office shutdown
• Monthly one-on-one Sanctus mental health coaching session
• Optional Vitality Health Insurance with discounted Apple Watch, cinema tickets, and Amazon Prime
• Cycle-to-work scheme with up to 47% savings on a new bike
• Flexi start time between 9am and 10am
• Employee referral scheme
• Regular appraisals for feedback and growth
• Weekly dedicated training time for personal development
• Collaborate with prestigious global brands in media, sports, and entertainment
• We take great pride in our culture of acceptance, diversity and inclusion
• Complete regular surveys to provide anonymous feedback on the business, leadership team and your role to ensure that we are doing everything we can to keep improving and making FX a great place to work
• Join us at our monthly Show and Tell, where team members update us on what they’ve been working on
• Get nominated for the monthly FX Factor by your peers and get recognised for your contribution to the business.
• Get a chance to earn a £20 voucher for high project NPS scores

Additional Information

If you’re passionate about this role and believe you can add value, we encourage you to apply, even if your background doesn’t match the job description exactly.

This is a full-time role based out of our office in Old Street, London. We can only consider applicants who are able to work 3 days per week from the office.