Staff Frontend Software Engineer

Blis; Greater London; Hybrid; GBP 90,000 - 140,000; Full time

Job summary

Blis in London/Edinburgh is seeking a Staff Frontend Software Engineer to own frontend architecture powering internal and customer-facing web apps for complex ad campaigns, reporting, analytics, and data visualization.

You will mentor engineers, shape the frontend platform roadmap, and collaborate with Product, Design, and backend teams to raise performance, accessibility, testing, and developer experience. This role is based in a hybrid environment with global impact.

Responsibilities

• Own the frontend architecture; shaping decisions around performance, scalability, accessibility, and design systems.
• Set the standard for frontend engineering quality; establish patterns, tooling, and practices for the organisation.
• Shape and maintain a technical roadmap for the frontend platform aligned with product and business goals.
• Lead cross-functional initiatives with Product, Design, and backend engineers to deliver major features.
• Mentor and develop engineering talent, driving a culture of engineering excellence.

Job description

London or Edinburgh based, hybrid working We are looking for a brilliant, creative, curious, and technically ambitious Staff Frontend Software Engineer to join our team. This team delivers internal and customer-facing web applications to manage complex ad campaigns and provide deep reporting, analytics, and data visualisation capabilities powered by big data and machine learning technologies. Geospatial data is at the heart of what we do, and this team helps make it beautiful, useful, and inspiring. As a tech-first product company, this team works on what's visible and matters to customers and the business!

The Role

• Own the frontend architecture; shaping architecture decisions that span multiple areas of our product, making foundational decisions around performance, scalability, accessibility, and design systems.
• Set the standard for frontend engineering quality; establish patterns, tooling, and practices that the whole organisation follows.
• Shape and maintain a technical roadmap for the frontend platform aligned with product and business goals.
• Lead cross-functional technical initiatives, collaborating with our Product, Design, and backend engineering teams to define and deliver major features.
• Develop engineering talent through mentorship, technical leadership, and driving a culture of engineering excellence.
• Improve developer experience across the frontend ecosystem, reducing friction in development, testing, and deployment workflows.
• Drive a clear testing ethos that balances confidence and delivery speed, including unit, integration, and end-to-end testing approaches.

What success looks like

In your first 90 days, you'll have developed a clear picture of where our frontend platform is today; its strengths, its debt, and its biggest opportunities. You'll have built trust with the engineers, product managers, and designers you'll work closest with, and you'll have a point of view on where we should go next.

About Us

Blis is the only omnichannel DSP that unites telco data, real-world movement patterns, and transactions to deliver a complete view of the consumer. Powered by T-Mobile and built for precision at scale, Blis' omnichannel platform helps marketers map the full purchase journey - from impression to transaction - and expand their audience reach, driving incremental results across every screen.

Founded in the UK in 2004, Blis employs over 300 global employees across 14 offices in 11 countries.

Our Values - B.L.I.S.

Brave

We're leaders not followers

An innovation and growth mindset helps us solve everyday challenges and achieve breakthroughs. Our passion drives us to innovate. We don’t see barriers, just possibilities.

We take ownership and hold ourselves accountable for outcomes, good and bad - and we don’t pass the buck.

Love our clients

We're client obsessed

We do what we say and build trusted relationships with our partners for the long term. We act with integrity. We put our clients at the center of our business. We obsess over the best insights, ideas and solutions to deliver WOW and work with honesty and accountability to get it done.

Inclusive

We're one team

We are empathetic and embrace diversity. Everyone has a voice and can bring their authentic self to work. We care about and support each other – with humility and good humor. Mutual respect and wellbeing are key. We strive to eliminate bias and be open and transparent.

Solutions driven

We're action oriented

Speed matters in business, so we're solution-driven and action-oriented. We value simplification and calculated risk taking. We are lean, agile and resourceful self-starters. We collaborate and break silos, working thoughtfully and with urgency to solve problems, while learning from mistakes and celebrating wins.