We are looking for a Senior SAP BusinessObjects Expert with deep platform knowledge to diagnose and resolve critical refresh and publication failures in a BO 4.3 environment. This mission is ideal for a consultant who wants to engage in high‑level, high‑impact, short-term interventions, followed by occasional expert support throughout the year. You will join a client struggling with intermittent WebI refresh errors and unstable overnight publications, currently on BO 4.3 SP4 Patch 7, with an upcoming upgrade to SP5. Your role: quickly understand, stabilise, optimise, and guide their next steps. Location : Luxembourg (On-site & Remote Hybrid). Contract : Short-term expert mission (3-5 days) + on-call specialised consulting. Start date : ASAP Responsibilities Phase 1 - diagnostic & root cause analysis: Analyse Web Intelligence refresh failures and "generic/system error" messages. Investigate instability in scheduled and overnight publications. Review logs, traces, APS/WebI server configuration, JVM sizing, timeouts, and resource allocation. Reproduce issues, isolate causes, and validate hypotheses. Phase 2 - stabilisation of the BO platform: Optimise WebI processing servers and APS distribution. Implement corrective configuration changes to improve stability and refresh reliability. Support scheduling, publication workflows, and fail‑safe retries. Document all fixes and changes applied. Phase 3 - advisory & strategic recommendations: Provide a clear path to migrate safely from SP4 to SP5. Advise on future architecture, clustering, performance tuning, and robustness improvements. Evaluate the UNV-based semantic layer (4 universes, multiple versions each). Recommend a mid-term strategy for UNV ⇒ UNX migration (not required immediately). (Optional) Advise on BO & Power BI coexistence / integration patterns. Support & collaboration: Work closely with a small internal team (2 full-time report developers). Transfer knowledge and provide actionable guidance for long-term autonomy. Be available for occasional call‑on consulting during the year. Technical must-haves 10+ years SAP BusinessObjects experience, with deep understanding of: BO Platform Administration Web Intelligence processing engine APS configuration & optimisation Scheduling & Publication framework Windows-based BO deployments Proven ability to troubleshoot WebI refresh failures and inconsistent publication executions. Experience fixing SP4 instabilities and preparing/validating upgrades to SP5. Strong diagnostic abilities: logs, end-to-end traces, error patterns, JVM behaviour. Environment experience: BO 4.3 (SP4/SP5 experience strongly preferred) Windows Server environment Universes in UNV format (experience with UNV technical debt) Multi-version universe maintenance Soft skills: Highly autonomous and structured Strong analytical and problem-solving mindset Ability to explain complex concepts clearly Comfortable leading a diagnostic mission with limited initial information Excellent communication with both technical and non-technical stakeholders Language: English mandatory Nice to have: Experience with Power BI integration in SAP BO environments Experience planning or executing UNV ⇒ UNX migrations Ability to audit SQL performance behind Web Intelligence queries Knowledge of cloud or hybrid BO architectures Experience with BI 2025 preparation strategies Hays plc est l'un des principaux groupes mondiaux de recrutement de professionnels. Hays est l'expert du recrutement de personnes qualifiées, professionnelles et compétentes dans le monde entier. Hays est le leader du marché au Royaume-Uni et en Asie-Pacifique et également l'un des leaders du marché en Europe continentale et en Amérique latine. Hays intervient pour le compte de milliers d'entreprises des secteurs privé et public, sur des postes en CDI, CDD, Travail Temporaire et Contracting. Hays France & Luxembourg compte aujourd'hui plus de 650 salariés répartis au sein de 22 bureaux (Aix-en-Provence, Amiens, Biarritz, Bordeaux, Clermont-Ferrand, Dijon, Grenoble, La Rochelle, Lille, Lyon, Montpellier, Nancy, Nantes, Nice, Paris, Reims, Rennes, Rouen, Strasbourg, Toulouse, Tours et au Luxembourg) couvrant 25 secteurs d'activité.