Sales Engineer I - Poland & CEE

Mollie; Warszawa; On-site; PLN 150,000 - 210,000; Full time

Job summary

Mollie in Warsaw is seeking a Sales Engineer to bridge technology and business, supporting the sales team through pre‑sales with solutioning, demos, and technical presentations. You’ll own complex API integrations and articulate technical value to mid‑market customers.

Fluency in Polish and English, 2–3 years in sales/solutions engineering, and experience with Postman and REST APIs are essential. You’ll work in a fast‑growing SaaS/fintech environment and collaborate across product and commercial

Qualifications

• 2–3 years in a sales engineering/solutions engineering or pre‑sales role.
• Background in engineering (mechanical, software, or similar) is a plus.
• Solid understanding of APIs and REST APIs; hands‑on experience with Postman.

Responsibilities

• Create custom technical demos and solution pitches.
• Conduct deep technical discovery across complex customer cases.
• Design scalable API integration solutions for mid‑to‑upmarket customers.
• Collaborate with sales, CS, and product teams to identify growth opportunities.
• Share knowledge through internal training and sessions.

Skills

Sales engineering

APIs & REST

Postman

Polish & English

Stakeholder mgmt

Tools

Postman

Job description

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

Want a peek behind the scenes? 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.

Step 2

Screening call

If you seem like a Mollie-in-the-making, we’ll invite you to a screening call so we can learn more about each other.

Step 3

Are you the one?

You’ll have two or more interviews. And if it’s a highly technical role, we’ll also assess the specific skills you’ll need.