.Research Engineer and Doctoral StudentInfinera is looking for an excellent intern professional with a master's degree in electrical engineering, computer science, or physics to join our Optical Architecture Group in Lisbon, Portugal and enrol in a PhD program. The PhD work is part of the Doctoral Network (DN) NESTOR funded by the European Commission and it will be carried out at Infinera premises in Lisbon. As part of the training activities, the candidate will also have a secondment at Politecnico di Torino, Turin, Italy. The PhD degree will be awarded by Instituto Universitário de Lisboa (ISCTE).The evolution of optical networks will be paramount to sustain demanding applications such as 5G/6G, cloud services, and AI/ML. Coherent pluggable transceivers are one of the key innovations driving this evolution. The research and development work will focus on modelling and optimizing next-generation metro-aggregation networks leveraging coherent pluggable transceivers. The main objectives include:Investigating efficient and flexible node architectures to support both P2P and P2MP connections in metro networks.Investigation of accurate and fast performance estimation methods suitable for the converged metro network scenario.Development of an optimization framework tailored for the design and operation of converged metro networks using P2P- and P2MP-capable coherent pluggable transceivers.Benchmarking the effectiveness of the proposed methodologies and techno-economic assessment of the proposed solution against legacy ones.Within the framework of this program, the candidate will work most of the time at the site of Infinera in Lisbon, where he/she will be part of a multi-disciplinary architecture team that actively contributes to the definition and implementation of Infinera's next-generation optical line system and planning tools.Essential Functions / Key ResponsibilitiesInvestigate existing and new optical node architectures for converged metro networks leveraging point-to-point and point-to-multipoint coherent pluggable transceivers.Develop network design and operation frameworks tailored for converged metro networks optimizing metrics such as cost, power consumption, footprint and scalability. Execute detailed techno-economic comparisons.Implement simplified models to estimate optical performance in converged metro networks using coherent pluggable transceivers and the selected node architectures.Work collaboratively with other forward-thinking team members and external researchers from academic and industry.Write and present internal and public reports and deliverables.Write and present technical papers in high-impact journals and conferences from the IEEE and OPTICA.Knowledge / Skills / AbilitiesUnderstanding of digital communications and telecommunications systems.Knowledge of the most relevant subsystems of an optical communication system (i.E
