Implementation Manager I - Poland & CEE

Mollie; Warszawa; On-site; PLN 140,000 - 190,000; Full time

Job summary

Mollie is seeking a post-sales integration lead to own the delivery of the most complex deals from handover to go-live and handover. You will coordinate with sales, onboarding, product and engineering to resolve issues, track timelines, and keep stakeholders informed throughout the process.

This newly formed function offers influence on process design and a flat, collaborative team culture, with a focus on delivering scalable, high-quality implementations across Europe.

Qualifications

• 3+ years in implementation, onboarding or delivery in a customer-facing role.
• Excellent communication in Polish and English.

Responsibilities

• Own post-sales integration from handover to go-live.
• Coordinate with sales, onboarding, product and engineering.
• Maintain project timelines and update stakeholders.

Skills

Implementation

Project management

Onboarding

Delivery

Customer-facing

Tools

APIs

Integrations

Technical documentation

Job description

Build with us

Since 2004, we've had one clear goal: to make payments and money management effortless for every business in Europe.

Today, more than 250,000 companies use Mollie to get paid, manage money and grow – with products designed to be simple, scalable, and dependable.

With 950+ Mollies across 14+ locations, we care deeply about autonomy and craft. So we work in small teams, with real ownership, and we trust you to make the right decisions.

We're building for the long term, so we provide the tools you need, processes you can rely on, and a balanced work environment to help you do work you're proud of.

Sound like your kind of place? Let's build together.

Your impact

You'll own the post-sales integration phase for Mollie's largest and most complex deals, taking full responsibility from contract signature through go-live and the handover that follows. That means acting as the central point of contact for the merchant and every internal Mollie team involved, setting out the activities, owners, and timelines needed to get each implementation live.

You'll coordinate closely with sales, sales engineering, onboarding, compliance, product, and other teams to resolve issues as they come up, using your technical understanding to assess merchant problems, work through documentation, and route issues to the right place. You'll keep merchants, digital agencies, and internal stakeholders informed with regular updates, and you'll monitor progress against the agreed go-live date so you can act early when timelines are at risk.

This is a newly formed function that's now expanding into new markets. That means you'll have genuine influence over how the role and its processes take shape, working closely with a flat, collaborative team where good practice is shared regardless of hierarchy.

What you'll ship

• Own the post sales integration phase for Mollie's largest and most complex deals, from handover through testing to go live
• Run kickoffs with internal and external stakeholders, setting go live dates and keeping progress on track
• Organise and track testing, raising issues and feedback as they surface
• Coordinate across sales, product and engineering colleagues, as well as with merchants directly, to keep everyone aligned
• Keep agreed go live dates on track, since delays mean missed revenue
• Maintain documentation and playbooks that make delivery predictable and scalable

What you'll bring

• At least 3 years of relevant experience in implementation, project management, onboarding, delivery, or a similar customer-facing role.
• Excellent communication skills in Polish and English

• Experience in payments, fintech, e-commerce is a plus
• Proven experience managing complex implementations from contract signature through go-live and handover.
• Solid understanding of APIs, integrations and technical documentation, with the ability to investigate implementation issues and work with technical teams.
• Strong project and stakeholder management skills, including managing timelines, blockers, dependencies and multiple internal and external stakeholders.
• Structured, proactive and pragmatic approach, with strong ownership and the confidence to challenge when needed.

Grow your way

At Mollie, growth is personal. We believe everyone should have the chance to develop their skills, explore new challenges and shape their career on their own terms.

You'll get regular feedback and performance reviews to support your development, with fair and transparent salary reviews along the way. Many Mollies move into new roles or take on new projects to stretch themselves, and we actively hire from within to help you take the next step.

No matter if you're aiming for promotion, exploring a different career path or building new skills, you'll be supported with the tools, trust and opportunities to grow your way.

Want a peek behind the scenes? Check out what life at Mollie is really like.

Unlock your full potential and join us to eliminate financial bureaucracy

If you're excited by the idea of building what's next, for yourself and for thousands of businesses across Europe, we'd love to hear from you.

AI at Mollie

We believe in Always Be Shipping, and AI brings that philosophy to life across every team, every role, every day.

AI is core to how we build. It helps us move faster, simplify work and make smarter decisions, creating real impact for the businesses we serve. We're looking for people who are excited to use AI to shape the future of finance with us.