Principal Frontend Developer

Principal Frontend Developer.

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Wrocław/Warsaw, Poland (Hybrid)

We’re on the hunt for a Principal Frontend Developer to join our team!

You will work closely with our Head of Engineering to define and uphold frontend engineering standards, lead our Communities of Practice, develop the engineers around you, and act as a trusted technical partner to our clients. At the same time, you will remain hands-on — taking on Tech Lead responsibilities within client engagements when needed and leading by example in craft.

This is not a purely managerial role, nor a purely technical one. It requires fluency across both and the credibility to operate at the Principal level in all three pillars of our framework: client work, internal collaboration, and technical specialism.

This is a hybrid role – your time will be split between working from home and working in our Wrocław office.

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About You

• Proven ability to lead Communities of Practice and shape engineering culture, not just participate in it
• Strong stakeholder management and communication skills — equally comfortable talking to engineers and to senior client decision-makers
• Collaborative by nature — works closely across disciplines (Delivery, UCD, QA, DevOps) and brings people with them
• Willing to attend our Poland office as needed

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Requirements

• 8+ years of experience in frontend software engineering, with meaningful time at Senior Consultant level or equivalent
• A track record of technical leadership on complex, client-facing engagements — not just strong individual contribution
• Demonstrable experience mentoring or managing engineers and helping them grow
• Prior experience in a consultancy or agency environment is strongly preferred
• Deep expertise in modern frontend development — component architecture, state management, build tooling, and the wider ecosystem
• Strong, practical knowledge of accessibility (WCAG 2.1 AA as a baseline), web performance (Core Web Vitals), and testing across unit, integration, and E2E
• Able to make high-quality architectural decisions in complex, ambiguous environments and articulate the trade-offs clearly
• Comfortable contributing hands-on in critical delivery situations — this is not a purely strategic role

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Who We Are

TDS is a growing software consultancy of 200+ passionate engineers, designers, and strategists.

We specialise in delivering high-quality, scalable, and innovative software solutions — with particular depth in software engineering, quality engineering, and strategic AI. As our Engineering Practice continues to grow, we are looking for a Principal Frontend Consultant to help shape its future. This is a senior leadership role that sits at the intersection of technical strategy, people development, and client impact.

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Why Choose TDS

Progression Opportunities

A genuine step-up opportunity, with close mentorship from the Head of Account Management and direct exposure to the CEO and commercial strategy.

Culture

A culture that backs commercial ambition: you will be given real responsibility and the autonomy to go after it.

Salary

Competitive base salary with commission tied to new logo performance.

Exciting Portfolio

Strong delivery credentials and an exciting AI and engineering portfolio to take to market in sectors that matter.

Driving Growth

The chance to grow with a consultancy that is scaling fast and values the people helping to drive it.

Travel Opportunities

National and international travel, including our European hub in Poland.

UK Benefits

Work-Life Balance

25 days annual leave plus bank holidays and length of service annual leave reward, because time to recharge matters.

Flexibility to Suit Your Needs

We combine the benefits of collaboration and connection with the flexibility of remote hybrid working to suit your style of working.

Continuous Learning

From technical training to industry certifications, we provide the support and opportunities you need to develop your skills and progress your career.

Health & Wellbeing

We offer private medical and dental insurance through Bupa to help support your health, wellbeing and peace of mind.

Perks & Rewards

We offer a cycle to work scheme, wellbeing support, everyday discounts and resources through Perkbox and our Employee Assistance Programme.

Company Socials

From monthly socials to our annual company holiday, we make time to build connections. Each of our four offices hosts regular socials, and colleagues are welcome to join any of them. Our colleagues often work remotely and it’s important to us to bring people together and give everyone the chance to connect and unwind.

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