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Prepare presales work and create offers for business customers. Analyze ICT and telecommunications requirements, gather and document data from systems and contracts, understand customer portfolios and existing agreements, and coordinate requirements with Sales and the A1 Austria business area. The role requires German communication skills, structured data research, SAP and CRM experience, Microsoft Office proficiency, attention to detail, and interest in ICT products.

Design, develop, and maintain scalable RESTful and gRPC APIs for telecom network services and integrations. Build secure, high-performance backend services, integrate with 5G, LTE, MPLS, and SDN infrastructure, and manage API versioning, documentation, monitoring, and lifecycle operations. Collaborate with network engineers and product teams, troubleshoot performance issues, and write reliable, tested code using modern cloud, containerization, and microservices technologies.

Drive presales for ERP, CRM, BI, and AI solutions by analyzing business requirements, designing end-to-end architectures, defining integrations, delivering executive presentations and demonstrations, supporting proposals and RFPs, and developing proofs of concept. The role partners with sales and technical teams to translate technology capabilities into business value for enterprise clients.

Design, develop, test, release, monitor, document, and support enterprise integration solutions using TIBCO technologies. The role includes managing ESB service updates, automating infrastructure and business-process monitoring, analyzing incidents, supporting failed-flow reporting, collaborating with international Agile teams, and providing on-call support for EAI/ESB issues.

Prepare financial statements under local GAAP, support external audits, participate in financial closing and statement reviews, and design and maintain SOX controls. The role requires accounting expertise, IFRS knowledge, Excel proficiency, strong organization and communication skills, English fluency, collaboration, accountability, and a commitment to continuous development.

Design, develop, and test scalable batch and near-real-time Big Data solutions. Build and architect the central Data Lake, optimize data flows, validate processing accuracy, and collaborate with data scientists and stakeholders. The role also involves developing data pipelines, evaluating new technologies, and working with Python, SQL, Linux, and distributed data-processing tools.

Supports high availability, monitoring, reporting, incident resolution, root-cause analysis, production changes, deployments, automation, and service design for A1 Group voice-channel and IVR applications. The role requires contact center platform administration, SIP/RTP/VoIP knowledge, IVR and CTI fundamentals, omnichannel and CRM integrations, telephony components, networking, and troubleshooting skills.

Develop, maintain, and support .NET Core backend services: implement features, fix bugs, ensure code quality, collaborate with business consultants and participate in daily team meetings.

Provide second-level support for billing systems: monitor, maintain and troubleshoot production and test environments; run billing/rating/batch jobs; execute SOX controls; create reports; automate routine tasks with scripts; handle incidents within SLAs and participate in on-call rotation.

Senior individual contributor owning end-to-end wholesale solution sales across IoT, roaming, IPX and travel SIM. Build strategic customer relationships, design commercial solutions, manage pricing and proposals, coordinate cross-functional teams, maintain pipeline, close complex multi-stakeholder deals and represent the company internationally.