MISSION

As a System Integration Engineer within the PAY Onboarding team, you will play a critical role in ensuring exceptional customer experience across the company Digital Payment solutions. You will act as a trusted technical partner for customers, guiding them through onboarding, integration and delivery phases deeply understanding their goals, constraints and full ecosystem.
This role goes beyond technical integration as it requires strong customer empathy, curiosity, proactive problem-solving or ability to understand the full picture, anticipate risks, propose effective solutions.
You will work closely with global customers and internal stakeholders to ensure successful, high-quality deliveries and long-term customer satisfaction.
You will be in direct and continuous contact with customers worldwide, representing company with professionalism, ownership and strong customer-first mindset.

A week in the life:
• You develop and maintain deep technical expertise in company’s product and SDKs, enabling you to assemble, configure and deliver solutions efficiently, on time.
• You actively engage with customers’ development teams, not only responding to questions, but understanding why the customer is asking it, identifying root causes and addressing the real underlying needs.

• You ensure customers clearly understand PAY concepts, flows, constraints, best practices by delivering:

Technical trainings.
• Integration workshops.
• Architecture discussions.
• Hands-on onboarding and technical support sessions.
• You take ownership of customer experience by looking at problems holistically, considering technical, functional, operational, business impacts and proactively proposing mitigations or improvement options.
• You collect, analyze and structure customer feedback and actively collaborate with R&D teams by: Suggesting product enhancements and new features.
• Highlighting recurring integration challenges.
• Representing the customer’s voice in internal discussions.
• You collaborate closely with R&D teams in Europe and Asia, Technical Leaders, Product Management to resolve complex issues and align on deliveries.
• You leverage R&D support when needed for advanced technical topics, such as security discussions or low-level SDK investigations, while remaining accountable for customer communication and follow-up.
• You participate in regular customer meetings, including on-site engagements when required, acting as a professional and reliable company representative.
• You maintain Live customer requests in parallel, providing field support as an L2 support engineer, ensuring stability, continuity and clear communication throughout the lifecycle.

PROFIL

Technical Expertise
• Solid experience in software development and validation, preferably using: Java / Kotlin (Android)
• Objective-C / Swift (iOS)
• Strong interest in mobile applications, SDKs and end-to-end integration flows.
• Preferred experience with: Mobile platforms, libraries, tooling.
• SDK development.
• Multiplatform frameworks (e.g. Cordova, React Native, Flutter).
• Experience with using Coding assistants such Claude and AI in general.

Customer & Communication Skills
• Excellent customer-facing skills, with the ability to communicate complex technical topics clearly, professionally and empathetically.
• Strong curiosity and analytical mindset: consistently asks “why” to understand the customer’s real need rather than providing answers only.
• Demonstrated ability to adapt communication style to different audiences (developers, architects, product teams, management).

Ways of Working
• Highly proactive, self-organized, able to manage multiple customer topics and priorities independently.
• Strong problem-solving and analytical skills with ability to observe situations from multiple angles and propose pragmatic solutions.
• Comfortable working in a global, multicultural environment, collaborating across regions and time zones.
• Shows leadership potential, with the ability to influence, guide customers and support less-experienced team members over time.

Languages & Education
• Fluent in English (spoken and written).
• University degree in Computer Science, Electrical Engineering, or a related technical field.
• Minimum 5 years of relevant experience in software development, system integration, or customer-facing technical roles.

Who We Are Really Looking For
We are looking for someone who:
• Is genuinely customer-oriented and takes pride in customer success.
• Balances technical depth with strong interpersonal skills.
• Thinks beyond tasks and tickets to understand the full customer journey.
• Is proactive, curious, continuously looking for better ways to deliver value.
• Has potential to grow into a senior or leadership role within onboarding or delivery teams.

Nice to have :
• Overall BackEnd technical and BackEnd integration knowledge is well appreciated

NOTRE AGENCE

Benefits:
• long-term employment or cooperation as a contractor
• individual benefit system Cafeteria
• meal contribution
• Multisport card
• Yearly public transport card
• 5 weeks holiday + 3 sick days
• Work & Life Balance (hybrid model of cooperation – 3 days per week onsite, Prague)
• Green Environment & 2022 label #GreatPlaceToWork
• #fungineers concept – events, sporting events, positive mood
• free entry to the Prague ZOO for you, friends or family members

GROUPE SII

Who are we?

The SII Group is at the heart of innovation, serving major accounts in a variety of engineering sectors. In 2026, for the ninth consecutive year, SII France was awarded the Great Place To Work® label.

This success reflects our culture, which is based on our desire to offer all our employees a fulfilling working environment in which they can develop their skills and careers.

Joining SII means embarking on a collective adventure: Let's Tech Together!

This promise represents our shared ambition: to build a technological future together, in an environment where experimentation and autonomy are encouraged, where innovation is at the heart of everything we do, and where every employee finds professional fulfilment and empowerment within an enthusiastic and inclusive team.

As a company with strong human values, we are signatories to the LGBT+ Commitment Charter with the Association l'autre Cercle and are a disability-friendly company.

Let's Tech Together embodies who we are and what we aspire to be: a dynamic, innovative and people-oriented company. So if these values resonate with you, join us!

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