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Senior Software Engineer (f/m/d)
* Full Time
* Hybrid
* Saarbrücken, Deutschland
* With Professional Experience
* 2/24/26
As a Senior Software Engineer, you are responsible for designing and developing IMCs platform architecture covering both the software and infrastructure aspects of the platform with a key focus on its platform search feature. The role is expected to work closely with the Tech leadership and product teams to define short- and long-term improvements to address the growth of our customer experience.
What you'll be doing
* Plattform & Application Engineering:
o Partner with Software Architects, Tech Leaders, and Product Managers to analyze and transform business requirements into robust software specifications
o Design and develop highly scalable, secure, and low-latency RESTful APIs for our platform
o Contribute to the design of distributed, cloud-native application components, ensuring resilience, observability, and operational excellence
o Actively participate in architecture decisions and contribute to short- and long-term technical strategies
o Build, operate, and continuously improve infrastructure and platform services following DevOps and GitOps principles
o Collaborate in small, agile, cross-functional teams and contribute to knowledge sharing and mentoring
* Search Technology (Full-Text & Vector):
o You will be a domain lead or key contributor for the platform’s search capabilities. Responsibilities include:
+ Design, implement, and optimize search pipelines covering full-text indexing, retrieval, ranking, and faceting
+ Vector-based semantic search (ANN: HNSW, IVF, PQ, graph-based indexing, hybrid fusion techniques)
+ Own the architecture and lifecycle of search indexes across multiple modalities (documents, metadata, embeddings)
+ Optimize and tune search engines and vector databases, such as: Elasticsearch/OpenSearch, Pinecone, FAISS, etc.
+ Optimize system-level performance, including: Indexing throughput, refresh strategies, segment merging, query latency, ranking accuracy, and memory/CPU footprint
+ Design hybrid retrieval strategies combining BM25/TF-IDF with vector similarity (RRF, fusion scoring, re-ranking models)
+ Implement monitoring and observability for search systems, including relevancy metrics, degradation detection, and anomaly tracking
What you'll need
* 5+ years of professional experience in agile software development
* Strong expertise in Java, Spring Framework, and Spring Boot
* Experience with Containers and Kubernetes or similar technologies (e.g., Docker)
* Solid understanding of distributed systems and cloud-native architectural patterns
* Advocate of Clean Code and the DevOps culture (e.g. one of, GitLab CI, Jenkins, Gradle, Maven, Ant, Gulp, Ansible, Salt, Terraform, Prometheus, Kibana, Grafana, Logstash, Beats, Helm)
* Experience with cloud-native development technologies and practices is a plus (IaC, GitOps, DevOps, Cloud Computing)
* Knowledge of Microsoft Azure, AWS or similar cloud computing platforms is a plus
* Fluency in English is mandatory, Fluency in German would be a big advantage
* Bring a positive and solution-oriented mindset
* Self-motivated and self-managing, with strong organizational skills
* Great communicator that can easily explain ideas and engage people while translating business requirements into technical solutions
What's in it for you
* You can actively participate in and drive agile approaches and processes for improving our cloud native strategy
* You build and operate platform and infrastructure core services in a distributed service-oriented architecture in a small autonomous agile team
* Flexible working hours, flat hierarchies, and a cooperative culture
* Hybrid working: We offer "Full flexibility, but not 100% remote". You can combine the advantages of both worlds depending on your personal preferences
* Numerous corporate benefits, such as childcare subsidy, job ticket, sports offer, company pension scheme, employee discounts
* An individual development plan for each employee guarantees continuous personal growth and learning
* With a highly sophisticated onboarding program we ensure a smooth integration
* You have a share in the best practice of the e-learning industry
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