Our client is a leading European online car marketplace, connecting car buyers and sellers across the continent. The platform serves over 30 million monthly users and operates across 18 countries, making it one of the largest and most trusted digital marketplaces for vehicles in Europe.
We are looking for two Senior Integration Engineers to join an established client squad, working closely with its members and reporting to the squad's Tech Lead. You will contribute to two integration initiatives — Workday-to-Data-Lake and Marketplace-to-HubSpot — and are expected to work across both solutions, with sufficient overlap in skills to avoid dependency on a single consultant.
You will not be solely responsible for the solutions: technical direction, architecture alignment, prioritisation, and delivery oversight remain with the client squad and its Tech Lead. This is a hands-on engineering role within a collaborative, established team that values knowledge sharing and clear documentation.
Responsibilities:- Design, build, and maintain .NET-based integration services and microservices supporting the Workday-to-Data-Lake and Marketplace-to-HubSpot initiatives.
- Develop, deploy, monitor, and operationally support cloud solutions on AWS, ensuring secure configuration throughout.
- Implement robust API integrations covering authentication, data contracts, pagination/batching, rate limits, retries, error handling, and idempotent processing.
- Build event-driven and asynchronous integration flows, including webhooks, scheduling, historical loads, and incremental data feeds.Ensure data quality and reconciliation across integration pipelines, with clear source-of-truth ownership and secure handling of financial and operational data.
- Partner with the squad's Tech Lead and team members to align with the existing reference architecture, priorities, and delivery plans.
- Produce clear technical documentation and actively share knowledge within the engineering team.
- Maintain skill overlap with the second integration engineer across both solutions to ensure delivery continuity.
- 3+ years of experience in AWS/cloud and .NET Core development, ideally in an integration-focused engineering role.
- Proven experience building .NET-based integration services and microservices.
- Hands-on AWS/cloud experience across development, deployment, monitoring, secure configuration, and operational support.
- Strong API integration expertise: authentication, data contracts, pagination/batching, rate limits, retries, error handling, and idempotent processing.
- Solid grounding in event-driven and asynchronous integration patterns.
- Experience with data ingestion and integration pipelines, including historical loads, incremental feeds, scheduling, and webhooks.
- Track record of ensuring data quality, reconciliation, and secure handling of financial or operational data.Strong collaboration, documentation, and knowledge-sharing skills within an established engineering team; excellent verbal and written English skills.
- HubSpot API integration experience.
- Workday API or finance/ERP integration experience.
- Data Lake ingestion and structured data landing patterns.
- CRM and operational-workflow integrations.
- Experience extending or aligning with an existing reference architecture.
We offer*:
- Flexible working format - remote, office-based or flexible
- A competitive salary and good compensation package
- Personalized career growth
- Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
- Active tech communities with regular knowledge sharing
- Education reimbursement
- Memorable anniversary presents
- Corporate events and team buildings
- Other location-specific benefits
*not applicable for freelancers
Skills Required
- 3+ years of experience in AWS or cloud development and .NET Core development
- Experience building .NET-based integration services and microservices
- Hands-on AWS or cloud experience in development, deployment, monitoring, secure configuration, and operational support
- Strong API integration experience, including authentication, data contracts, pagination or batching, rate limits, retries, error handling, and idempotent processing
- Experience with event-driven and asynchronous integration patterns
- Experience with data ingestion and integration pipelines, including historical loads, incremental feeds, scheduling, and webhooks
- Experience ensuring data quality and reconciliation, with secure handling of financial or operational data
- Strong collaboration, documentation, and knowledge-sharing skills within an established engineering team
- Excellent verbal and written English skills
- HubSpot API integration experience
- Workday API or finance or ERP integration experience
- Data Lake ingestion and structured data landing pattern experience
- CRM and operational-workflow integration experience
- Experience extending or aligning with an existing reference architecture
What We Do
N-iX is a global software solutions and engineering services company that helps world’s leading organizations turn challenges into lasting business value, operational efficiency, and revenue growth using advanced technology. Whether you need to build a custom solution, modernize your digital product or acquire extra tech expertise - we have the experience and capabilities to ensure your success. With over 2,000 professionals in 25 countries across Europe and the Americas, N-iX offers expert solutions in cloud, data analytics, embedded software, IoT, AI, machine learning, and other tech domains. Being in business for over two decades, we have worked with dozens of industry-leading enterprises and Fortune 500 companies creating value across a wide variety of sectors, including finance, manufacturing, supply chain, retail, e-commerce, healthcare, and more. Our unique combination of business domain expertise and technical know-how enables us to effectively collaborate with ISVs, tech companies, and enterprises of all sizes. Thanks to the strong tech ecosystem and partnerships with AWS, GCP, Microsoft, SAP, OpenText, Snowflake, and others, we bring extra speed, scale and efficiency to more than 160 organizations across the globe. N-iX is recognized by numerous industry awards, such as CRN Solution Provider 500, Global Outsourcing 100 by IAOP, ISG Provider Lens™, Modern Application Development services providers by Forrester, etc
