Principal Software Engineer

FanDuel; City of Edinburgh; On-site; GBP 140,000 - 190,000; Full time

Benefits offered by this job

Salary and bonus

Pension

Private healthcare

Share save scheme

Flexible working

Generous holiday

Job summary

FanDuel Group is seeking a senior engineering leader to own the CPE domain architecture and drive operational excellence across the payments, onboarding, geolocation, and marketing systems. You will influence a large engineering organization, shape architectural standards, and guide AI-enabled development within a regulated environment, balancing long-term strategy with immediate delivery.

Based in the UK, you will collaborate with senior engineers and executives to ensure scalable, auditable,

Qualifications

• Expert-level experience designing scalable, fault-tolerant systems that perform under peak loads around live events.
• Experience influencing technical direction across 200+ engineers.
• Deep understanding of design patterns and architectural approaches.
• Hands-on command of AI-assisted software development and related tooling.
• Proven track record turning experiments into measurable improvements in throughput, quality and security in regulated environments.
• Ability to balance short-term needs with long-term technology goals.
• Experience with modern back-end languages, including Java.
• Proven ability to raise operational excellence through collaboration.

Responsibilities

• Take ownership of CPE’s domain architecture and align Senior Staff Engineers on a target technical strategy.
• Own domain operational excellence; resolve incidents and drive preventive actions.
• Write approachable code and set patterns through prototypes and reference implementations.
• Influence domain teams on tradeoffs between short-term needs and long-term tech strategy.
• Drive engineering best practices and standards for the CPE domain.
• Coach and mentor Senior Staff Engineers; support escalation and knowledge sharing.

Skills

Technical leadership

Scalable architectures

AI-assisted development

Java

Cross-team influence

High-scale reliability

Communication at scale

Regulated environments

Job description

The Position

You are a technical voice the Engineering organization trusts and follows. You are part of a community of FanDuel’s most senior Engineers, focused on the organization’s most complex and ambiguous problems: shaping our future architecture, setting technical expectations and guidance, and setting and maintaining the highest engineering standards.

You guide, influence and are accountable for the final technical call on choices that affect hundreds of engineers across multiple domains and verticals. You embody our principle Challenge and Commit and have proven experience in judging when to look for consensus and when the call is yours to make. You know how to communicate and connect successfully at scale, in person and asynchronously.

You regularly interact with executives up to the c-suite, distilling the essentials from a complex technical strategy and folding business strategy into our technical direction.

You own the technical strategy for the CPE engineering domain, with ownership & responsibility for technical architecture (current and target state), operational excellence and engineering standards.

CPE builds the systems fans touch first and trust most: payments and money movement, account and onboarding, geolocation, responsible gaming and player integrity, and the promotions, rewards and loyalty, campaign orchestration, personalization, and marketing messaging that shape every fan's day-to-day experience. That means designing for extreme peak load that spikes around live events, and for a heavily regulated environment where auditability and evidence matter as much as availability. You take a leadership role on the domain's most important work, balancing a long view against short-term demands and taking a pragmatic approach to architectural design. Your work always follows our principle – Everything Begins with the Customer.

You do not accept the status quo, and you strongly influence other domains and verticals, and the organization’s “North Star” technical strategy. You will spend some of your time working with the Principal Community and other senior Engineers to set the standard for how AI is used across the SDLC, including where we choose not to use it, and to shape our engineering practices, back-end and front-end architecture, FanDuel’s product suite, our tools, approaches and processes. You wear your FanDuel hat first and foremost; you do not restrict yourself to organizational boundaries – We are One team.

You mentor and support our Senior Staff Engineers, themselves highly experienced, and serve as a role model to our engineering community and a visible part of how the domain is run. You are Humble and Hungry.

What We’re Looking For

• Expert-level experience building and designing scalable, fault-tolerant and highly available systems, including systems under extreme peak load that spikes around live events
• Experience influencing technical direction across 200+ person Engineering organizations
• Expert-level understanding of engineering design patterns and architectural approaches.
• Deep, current, hands-on command of AI-assisted software development: agentic coding and spec-driven development workflows, the context and tooling that make them work, and review, testing and verification practices that hold up as code volume rises
• A proven track record taking an engineering organization past experimentation to a measured change in how software is built: setting the standards for where AI is and is not used, evidence of the effect on throughput, quality and security, and the judgment to tell real uplift from theatre. Able to do this in a regulated environment, where auditability and data boundaries constrain what AI is allowed to touch
• Experienced in making pragmatic tradeoffs between short-term needs and long-term needs
• Able to build trust and shared understanding with teams and engineers who do not report to you
• Deep experience in modern back‑end languages, functional and object‑oriented, including Java
• Demonstrated ability to raise operational excellence and best practice through influence and collaboration

What You'll Do

• Take ownership of CPE’s domain architecture, aligning the domain’s Senior Staff Engineers on a target technical architecture and strategy
• Take ownership of the domain’s operational excellence, taking a hands‑on approach to the resolution of its most complex issues when needed. This includes supporting resolution and mitigation of production incidents, and the corrective actions that prevent them recurring.
• Write simple code, taking complex paradigms and implementing them in a way that Engineers at all levels can understand and contribute to. You set the pattern through prototypes and reference implementations rather than owning feature delivery. Insist on high standards for code quality while not letting perfection be the enemy of the good
• Influence the delivery of the domain’s teams and their Staff and Senior Staff Engineers, helping them understand how to make technical tradeoff decisions between short-term business needs and long-term technology needs
• Drive engineering best practices (e.g., Operational Excellence, Security, Quality) and set standards for the CPE domain
• Help others leverage your expertise, by coaching and mentoring Senior Staff Engineers in your organization
• Support our software as part of the domain’s senior escalation tier, rather than the primary on‑call rotation

What You Can Expect

• Interesting work - working in a fast‑paced and ever‑changing industry, new problems and exciting solutions are never too far away. There are always opportunities to learn new skills and broaden your horizons
• A sense of achievement - Our teams own their own software and when that awesome new feature ships to users and the positive feedback starts rolling in, you can feel really proud of what you and your team created
• Personal development - clear and defined career pathways for every role at every level, a supportive manager, loads of learning opportunities and even 10% of your time to dedicate to your learning
• Belonging - everyone at FanDuel works for each other, we win together, make mistakes together and have lots of fun doing it
• Trust - A trusting work environment where productivity is valued above all else, giving you autonomy and ownership of your time and work
• Great financial package - Including salary, bonus, pension, private healthcare, share save scheme, flexible working & holiday policy along with a number of other benefits

ABOUT FANDUEL

FanDuel Group is the premier mobile gaming company in the United States and Canada. FanDuel Group consists of a portfolio of leading brands across mobile wagering including: America’s #1 Sportsbook, FanDuel Sportsbook; its leading iGaming platform, FanDuel Casino; the industry’s unquestioned leader in horse racing and advance‑deposit wagering, FanDuel Racing; and its daily fantasy sports product.

In addition, FanDuel Group operates FanDuel TV, its broadly distributed linear cable television network and FanDuel TV+, its leading direct‑to‑consumer OTT platform. FanDuel Group has a presence across all 50 states, Canada, and Puerto Rico.

The company is based in New York with US offices in Los Angeles, Atlanta, and Jersey City, as well as global offices in Canada and Scotland. The company’s affiliates have offices worldwide, including in Ireland, Portugal, Romania, and Australia.

FanDuel Group is a subsidiary of Flutter Entertainment, the world’s largest sports betting and gaming operator with a portfolio of globally recognized brands and traded on the New York Stock Exchange (NYSE: FLUT).

Diversity, Equity and Inclusion

FanDuel is an equal opportunities employer. Diversity and inclusion in FanDuel means that we respect and value everyone as individuals. We don't tolerate bias, judgement or harassment. Our focus is on developing employees so that they reach their full potential.

FanDuel is committed to providing reasonable accommodations for qualified individuals with disabilities. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please email [e-mail].

The requirements listed in our job descriptions are guidelines, not hard and fast rules. You don’t have to satisfy every requirement or meet every qualification listed. If your skills are transferable and you are in the ballpark experience-wise, we'd love to speak to you!