Integration Engineer (Client facing), Professional Services

United States Digital Space LLC; Stockholms kommun; On-site; SEK 600,000 - 800,000; Full time

Job summary

United States Digital Space LLC in Sweden is seeking an Integration Engineer. The role involves owning the technical relationship with strategic users through to live integration, along with leading complex technical discussions.

The ideal candidate will have over 4 years of experience in integration engineering, be proficient in coding and debugging, and be capable of leading discussions regarding API architecture. The position offers an opportunity to work on high-visibility projects.

Qualifications

• 4+ years of experience in software engineering or integration engineering.
• Ability to write and debug code in Go, Java, C/C++, or similar.
• Strong generalist technical background including knowledge of data structures.

Responsibilities

• Plan and execute integration engineering end-to-end.
• Lead technical conversations and manage user expectations.
• Collaborate with Sales and Product teams for user engagement.

Skills

Software engineering

Integration engineering

Code debugging

SQL

Payments domain knowledge

Technical conversations

Job description

Who we are

About the company

the company is a financial infrastructure platform for businesses. Millions of companies—from the world's largest enterprises to the most ambitious startups—use the company to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career.

About the team

the company's Professional Services team works with our most strategic users. You'll work on the highest-visibility projects, providing technical expertise that helps enterprises accelerate their knowledge, refine solution design, and build robust integrations with the company. This role sits at the intersection of deep technical execution and strategic advisory—leading conversations and developing plans that transform the payments and financial infrastructure of leading businesses.

What you'll do

As an Integration Engineer on the Professional Services team, you'll own the technical relationship with the company's most strategic users—from initial discovery through to live integration and ongoing optimisation. You'll bring together deep technical expertise and consultative skills to help enterprises design and implement complex integrations, resolve issues at pace, and continuously improve how they use the company's platform.

Responsibilities

• Plan and execute integration engineering end-to-end, from high-level architecture to code implementation—conducting discovery sessions, parsing specific use cases, and guiding users through high-complexity integrations
• Serve as the primary ongoing technical point of contact for large users' and partners' technical teams, resolving integration issues and owning escalations for operational issues and priority requests
• Lead strategic technical conversations, articulating how the company works from both a product feature and API architecture perspective, and managing user expectations on timelines and product changes
• Collaborate with Sales, Solution Architecture, and Implementation teams to drive user engagement and commercial outcomes on behalf of the Professional Services team
• Work closely with Product and Engineering to proactively surface potential enhancements and new features based on field feedback
• Provide deep technical support and debugging—inspecting the the company codebase, testing functionality thoroughly, building proof-of-concept integrations, creating user-specific test plans, and answering ad-hoc technical questions
• Lead hands-on keyboard implementations where required, providing substantive feedback on coding practices, CI/CD, and software architecture
• Review and optimise existing user integrations, providing recommendations to improve performance, reliability, and efficiency
• Build tools and analytics—including dashboards, queries, and custom data reports—to support user business reviews and operational needs
• Develop reusable processes and shared knowledge to enable the broader Professional Services team

Who you are

We're looking for someone who meets the minimum requirements to be considered for the role. If you meet these requirements, you are encouraged to apply. The preferred qualifications are a bonus, not a requirement.

Minimum requirements

• 4+ years of experience in a software engineering or integration engineering role
• Ability to write and debug code in languages such as Go, Java, C/C++, or similar
• Comfortable with code-level debugging (both the company and user code) and using code as a practical problem-solving tool
• Strong generalist technical background, including proficiency in SQL and a solid understanding of data structures and algorithms
• Understanding of the payments domain and API security principles
• Able to lead technical conversations and clearly explain how the company works from both a product feature and API architecture perspective
• User-first mindset with the ability to map business requirements to reliable technical solutions
• Confident engaging with users and leading strategic technical discussions

Preferred qualifications

• Experience in a customer-facing technical role such as solutions engineering, technical consulting, or implementation engineering
• Experience mentoring engineers or guiding technical teams through complex implementations
• Demonstrated ability to apply structured methodologies to ensure consistency and repeatability across engagements
• Strong technical writing skills, including the ability to document complex integration guidance and processes
• Track record of navigating and resolving ambiguous, open-ended technical problems both independently and collaboratively