Sales Engineer I - Poland & CEE

Mollie; Warsaw (IN); On-site; USD 31,000 - 46,000; Full time

Job summary

Mollie is looking for a Sales Engineer in Poland to join our professional services team. You will support the sales process with technical demos and deep API integration work, acting as the technical voice in commercial discussions.

You will own the customer lifecycle from discovery to deal closure, collaborating with product and sales teams to deliver tailored solutions and scalable integrations. This role emphasizes autonomy, craft, and continuous learning within a growing Europe-wide market.

Qualifications

• 2–3 years in a sales engineering, solutions engineering, or pre‑sales role; engineering background preferred.
• Strong understanding of APIs, REST APIs, and hands‑on Postman for demos & integrations.
• Fluency in Polish and English with excellent communication & presentation skills.
• Ability to translate technical concepts for both technical and non‑technical stakeholders.
• Proven ability to bridge business and technology perspectives and craft product solutions.
• Experience in SaaS/e‑commerce/fintech with external customers and merchants is highly desired.

Responsibilities

• Deliver custom technical demos and solution pitches using Mollie's API capabilities.
• Lead deep technical discovery from qualification to contract signature.
• Architect scalable API integration solutions for mid‑to‑upmarket customers.
• Collaborate on upsell and revenue initiatives with the CSM team.
• Share knowledge through internal training and sessions on Mollie products.

Skills

Sales engineering

API integrations

Communication

Problem solving

Stakeholder management

Education

Bachelor's degree in engineering or related field

Tools

Postman

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

As a Sales Engineer at Mollie, you sit at the intersection of technology and business, supporting our sales team through the pre-sales phase with solutioning, demos, and technical presentations. You are the technical voice in the room for our Poland commercial team, helping mid‑to‑upmarket customers understand exactly how Mollie's payment solutions solve their challenges and close deals through genuine technical value selling.

This role sits within a newly formed professional services structure, separate from the commercial organisation. That means real autonomy in how you work, dedicated leadership focused on craft and efficiency, and a direct line to product teams. You will own the full customer lifecycle from initial discovery through to deal closure, going deep on complex API integrations and custom solutions rather than off‑the‑shelf implementations.

You are joining at a pivotal moment. Mollie is growing fast, moving upmarket into more complex, longer deal cycles, and building out Sales Engineering as a true centre of excellence. The work you do here will directly shape how we win in one of our expansion markets.

What you'll ship

• Custom technical demos and solution pitches tailored to specific customer problems, built using tools like Postman and AI to bring Mollie's API capabilities to life in a compelling and relevant way

• Deep technical discovery across complex customer cases, from initial sales qualification through to contract signature, ensuring every deal is grounded in a thorough understanding of the customer's environment

• Scalable solutions architecture work that addresses mid‑to‑upmarket customer challenges, focusing on custom API integrations rather than standard plugin implementations

• Collaborative upsell and revenue initiatives with the CSM team, contributing technical expertise to identify and unlock growth opportunities within existing accounts

• Knowledge‑sharing sessions and internal training on Mollie products and the payments market, raising the technical bar across the broader sales and commercial teams

• Structured handovers to post‑sales implementation management at contract signature, ensuring a clean and high‑quality transition that sets customers up for success

What you'll bring

• 2 to 3 years of experience in a sales engineering, solutions engineering, or pre‑sales technical role, ideally with a background in engineering (mechanical, software, or similar)

• A solid understanding of APIs and REST APIs, with hands‑on experience using tools such as Postman to build and demonstrate integrations

• Fluency in Polish and English, with strong communication and presentation skills that allow you to translate complex technical concepts clearly for both technical and non‑technical stakeholders

• Proven ability to bridge business and technology perspectives, turning difficult technical problems into clear product solutions and pitching those solutions confidently to customers

• Strong stakeholder management skills, with the ability to work effectively across internal teams and with customers at varying levels of seniority, including examples of using AI in demos or pitches

• Experience in a SaaS, e‑commerce or fintech environment, with exposure to external customers and merchant interactions (strongly desired)

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.

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.

Check out what life at Mollie is really like.

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.