We are looking for a Senior Backend Engineer to join our AI Integrations team and help build the backend services, integrations, and data capabilities that enable innovative new solutions within our products. 

You will work on scalable Java applications, event-driven architectures, and data-intensive integrations that connect business processes with intelligent services. If you enjoy solving complex technical challenges, collaborating with skilled engineers, and exploring new technologies, we'd like to meet you.

Key about your role 

As a Senior Backend Engineer – AI Integrations, you will help build and maintain the backend services that enable new capabilities within our insurance platform. Working primarily in Java, you will design and develop scalable integrations that connect business processes, data platforms, and intelligent services. You enjoy solving complex technical challenges and building reliable solutions that can operate at scale. 

In this role, you will work extensively with integration patterns, distributed systems, and event-driven architectures. You will contribute to the design and implementation of data flows that support both operational processes and data-driven use cases. While this is not an AI specialist role, you are interested in emerging technologies and enjoy exploring how intelligent services can create value for customers. 

You will collaborate closely with Software Engineers, Product Owners, Architects, and other specialists in an agile environment. We are looking for someone who enjoys working as part of a team, shares ideas openly, and contributes to creating high-quality solutions together. 

Key about your team 

You will join the AI Integrations team within our insurance domain. This team focuses on building and maintaining integrations that enable intelligent capabilities across our products and services. 

The team consists of experienced engineers working in a collaborative and agile environment where experimentation, knowledge sharing, and continuous improvement are encouraged. Together, you will tackle complex integration challenges, explore emerging technologies, and help shape the future of our software landscape. 

Check out our blog posts and videos to see what it is like to work at Keylane. 

Requirements

You are an experienced backend engineer who enjoys working on complex systems and solving technical challenges together with others. You combine strong software engineering fundamentals with curiosity about emerging technologies and modern integration patterns. 

• At least 5 years of experience in backend software development. 

• Strong professional experience with Java and enterprise application development. 

• Experience designing and building distributed systems and integrations. 

• Hands-on experience with event-driven architectures and messaging platforms, such as: NATS, Kafka 

• Experience designing and implementing data pipelines and data flows. 

• Experience working with SQL and large-scale data platforms. 

• Experience modelling and exposing data for analytical or AI-driven use cases 

• Experience working in Agile development teams. 

• Experience building cloud-native solutions, preferably on Microsoft Azure. 

• Contribute to architectural decisions and help establish engineering standards and best practices within the team. 

The Tech Stack Must Haves 

• Java  

• Spring Boot  

• Event-driven architectures  

• Kafka / Event Hubs / Service Bus  

• REST APIs  

• SQL  

• Distributed systems  

• Cloud (Azure preferred)  

Nice to Haves 

• Data engineering  

• AI / LLM integrations  

• Container platforms (Docker/Kubernetes)  

• Temporal.io 

• NATS 

• Experience with columnar data formats like Parquet or Apache Arrow"  

• Experience with Query Engines (e.g. DuckDB, Datafusion) 

• Insurance or Pension domain 

A Certificate of Conduct (VOG) and reference check are part of the application process. 

Each employee within Keylane must follow training on information security and irrespective of the role, basic information security responsibilities apply. 

Benefits

• A monthly gross salary between € 4300 and €6300 based on 40 hours per week; 
• 8% holiday allowance of your total gross salary; 
• A profit share; 
• A pension scheme, with the option to save extra; 
• Travel reimbursement: Receive a mileage allowance of €0.23 per km or an NS Business Card, which can also be used for personal travel; 
• 24 holiday days (with the option to buy extra) and 7 inclusion days, which can be exchanged with fixed Dutch national holidays, allowing you to take them when you like; 
• Flexibility in working environment. As part of a hybrid working team, you will work partly from home and partly from the office. If you work in the office, a free lunch is waiting for you every day. If you work from home, you will receive a working from home allowance (€4 net per day) and internet allowance (€35 net per month); 
• The possibility of working remotely from abroad for up to 2 months per year; 
• The possibility to lease a bike through our bike leasing program; 
• A one-year contract that, subject to satisfactory performance, will be converted into a permanent contract; 
• The opportunity to develop yourself at our Academy through courses and training, both professionally and personally; 
• A comprehensive vitality offer to help you stay healthy; 
• An active and fun community of Keylaners. We also have after-work drinks at our in-house pub every Thursday.