Senior Frontend Engineer

Relesys; Greater London; On-site; GBP 48,000 - 67,000; Full time

Benefits offered by this job

25 days paid vacation

Competitive salary EUR 5000–7000 gross

Office in Vilnius, London, Odense, and

Job summary

Relesys is seeking a Senior Frontend Engineer to lead complex frontend initiatives across our platform. You will own the delivery from discovery to production, collaborating with Product, Design and backend teams while advancing our architecture and design system.

This role offers an office‑based path in multiple locations and a chance to shape the frontend roadmap during a period of rapid growth as we expand globally.

Qualifications

• 5+ years of professional software development experience.
• Strong TypeScript and browser fundamentals with production React/Angular experience.
• Bachelor’s degree in Computer Science, Information Technology, or similar.

Responsibilities

• Own ambiguous, high‑impact frontend initiatives from discovery through production, including outcomes.
• Partner with Product and Design to clarify problems and shape achievable solutions.
• Lead frontend design, balancing delivery speed, user experience, maintainability and migration costs.
• Break complex initiatives into safe milestones with testing, telemetry and feature flags.
• Design accessible, responsive experiences while evolving architecture and design system.
• Take responsibility for production outcomes and investigate difficult problems.
• Mentor engineers and improve code quality through reviews.
• Collaborate across frontend, backend, Product, Design and Quality Engineering to align decisions.

Skills

5+ years experience

TypeScript

React/Angular

Education

Bachelor's degree in CS/IT

Job description

Join a 5x Private Equity growth journey and build amazing frontend solutions as we turn Frontline Workers into Frontline Winners

We are looking for a Senior Frontend Engineer to lead complex frontend initiatives across the Relesys platform. You will take ownership from an initially ambiguous product problem through technical design, delivery, rollout and learning in production.

Working closely with Product, Design, backend engineers and other frontend engineers, you will create clarity, make architectural trade-offs and help the team deliver maintainable, accessible and high-quality product experiences. This is a hands‑on individual-contributor role with significant technical and project leadership responsibility.

A significant part of the role will be helping us evolve our frontend architecture incrementally while continuing to deliver customer value. Our product includes modern and established frontend technologies, and we are introducing new product experiences and AI‑assisted capabilities. You do not need to be an expert in every framework, but you must be able to lead safely across technical boundaries.

You will have the possibility to form part of our established office environment in Lithuania, Copenhagen, London, or Odense!

This is an exciting and transformative time to join Relesys, as we have gone into a strategic partnership with the Private Equity fund, Copilot Capital, where the coming years will bring extensive growth and opportunities along the way. You get a unique opportunity to make a tremendous impact in taking your career, Relesys and our dear clients to the next level over the coming years – as we say it, joining a scale‑up at this stage is a rare opportunity that is "once in a lifetime".

Your Key Responsibilities

• Own ambiguous, high‑impact frontend initiatives from discovery through production, including the outcome and not only the implementation tasks
• Partner with Product and Design to clarify the customer problem, challenge assumptions and shape an achievable solution
• Lead technical discovery and frontend design, making trade-offs between delivery speed, user experience, maintainability and migration cost explicit
• Break complex initiatives into safe milestones with appropriate testing, telemetry, feature flags and rollback plans
• Design and implement accessible, responsive and resilient experiences while evolving our frontend architecture and design system incrementally
• Take responsibility for production outcomes, investigate difficult problems, prevent recurring issues and adjust the solution when evidence changes
• Mentor engineers, raise the quality of technical discussions and code reviews, and help others make better decisions
• Collaborate across frontend, backend, Product, Design and Quality Engineering to create alignment and bring decisions to closure

Who are you?

• You have 5+ years of professional experience within software development and a proven track record of building, delivering, and maintaining high‑quality software solutions in a professional environment
• You have a demonstrated record of leading substantial frontend initiatives from an unclear problem to a production outcome
• You have strong TypeScript and browser fundamentals, with deep production experience in React, Angular or a comparable modern frontend framework
• Sound judgment in frontend architecture, state management, API integration, component design and maintainability
• Experience building accessible, responsive and well‑tested interfaces and improving performance using measurable evidence
• The ability to work effectively in a large or evolving codebase and modernise it incrementally rather than requiring a complete rewrite
• The ability to explain technical decisions clearly, mentor engineers and resolve disagreement constructively
• A product mindset and a habit of taking accountability beyond completing a backlog
• You are a team player and wishes to engage in the office and its succes while enjoying a collaborate positiv environment
• You have a bachelor’s Degree in Computer Science, Information Technology, or similar
• You believe that performance is not a matter of fast deliveries but high‑quality deliveries and a strong team spirit
• You have excellent communication skills in verbal and written English

Furthermore, it would be great, but not required, if you have/are:

• Modernising AngularJS or another legacy frontend while continuing normal product delivery
• Working across both React and Angular applications
• Creating design systems, shared frontend capabilities or visual‑regression practices
• Building mobile web experiences or applications delivered through a native WebView
• Introducing frontend observability or accessibility practices
• Using AI‑assisted development responsibly, including verification, testing and protection of confidential data

What do we offer?

• "Once in a lifetime" growth opportunity in an aspiring unicorn business that will 5x over the coming 4‑5 years backed by the Private Equity fund, Copilot Capital
• Great level of responsibility from day one in a dynamic and international environment
• A collaborative and thriving office‑first culture where team spirit and fun are at the heart of everything we do
• Access to cutting‑edge technology and resources, enabling you to excel in your role and drive impactful change
• The chance to make a significant impact on the long‑term strategic direction of our platform
• 25 days of paid vacation per year
• We offer a competitive compensation package based on your skills and experience, with a starting salary of EUR 5000‑7000 gross depending on level
• Office and team in Vilnius, London, Odense and Copenhagen
• Free coffee, tea, soda, or similar at the office
• Global Summer Party in Copenhagen with the whole organization
• Thriving Culture Club that plans Friday bars, running club, Tuesday fitness w. professional instructor, Wednesday bathing club, Summer parties, Christmas Parties and many other social events

The hiring process

• Teams call with Talent Department
• In‑office or online interview and casual first talk with our Head of Engineering
• Official Interview and Technical Challenge with the Head of Engineering, CTO, & Talent online
• Final step is the Assessio Personality test, which all Relesys colleagues take, with the purpose of strengthening our cross‑collaboration by becoming more aware of each person's unique strengths, communication style and where we make each other stronger!
• Follow‑up conversation about our match – If successful, we are excited to welcome you to the team!

When do you start?

• We are looking for a colleague to start as soon as possible
• We are always looking for great Talents, so the starting date is flexible depending on when we find our right match

We can't wait to hear from you and meet our future colleague!

Who are we?

Relesys isn't just another SaaS company; we are a dynamic force revolutionizing communication and performance management platforms. Established in 2014, we set out on a mission to bridge the gap between HQ and non‑desk workers, fostering a thriving workforce.

What value do we bring? People are the heartbeat of our client's business. When employees are thriving and successful, businesses flourish and retention rates increase. Relesys enables our clients to achieve this through an all‑in‑one app that streamlines communications, training, and daily operations into their own customized and ever‑evolving app.

With clients such as Salling Group, COOP, Carlsberg, and Vestas - to name just a few - Relesys serves clients in 15 different countries, supporting them in 40 languages with +500,000 licenses across 20,000 stores and users in +100 countries. We have a strong presence in the Nordics and EMEA, and we continue to increasingly attract clients from across the globe, as we are breaking into new, dynamic markets.

At Relesys, we're shaping the future for frontline workers across various industries: Retail, Hospitality, Production/Manufacturing, and Transportation – while having FUN, as our rule number one! Join us on this thrilling journey as we grow and venture into new horizons.

Our Culture

Building a world‑class organization and culture is our highest priority. We believe in the talent of our people and in long‑term collaborations where we value an informal yet highly professional culture. We always go 'the extra mile' for our colleagues and clients, but rule number one - Have fun! This rule is always at the forefront of our minds when we come to work, creating an environment that is filled with passion, energy, and inspiration. We are eager to see what exciting contributions you, as our new colleague, will bring, as we believe that each and every individual has a tremendous influence on the whole.