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Jobs at Celfocus (Now Hiring) — 8 open

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Telco Network Graph Engineer

Lisbon, Portugal · Hybrid

Mid level

Make an impact by working in sectors where technology is the enabler and innovation is the key. At Celfocus, we make data actionable through Next‑Gen Intelligence - where data, AI and human creativity come together. You’…

Skills: Graph Databases, Data Modeling, Cypher, Python, Java

Celfocus logoCelfocus

AI Engineer

Lisbon, Portugal · Hybrid

Mid level

Make an impact by working in sectors where technology is the enabler and innovation is the key. At Celfocus, we make data actionable through Next‑Gen Intelligence - where data, AI and human creativity come together. You’…

Skills: Python, LLMs, Prompt Engineering, RAG, Vector Databases

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BRM Consultant

Cairo, Cairo, Egypt · Hybrid

Mid level

Make an impact by working for sectors where technology is the enabler, everything is ground-breaking and there’s a constant need to be innovative. Create and enhance projects in Java, Python, Angular, PHP, .NET and so mu…

Skills: Oracle BRM, Java, SQL, C/C++, Requirements Analysis

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BRM Consultant

Cairo, Cairo, Egypt · Hybrid

Mid level

Make an impact by working for sectors where technology is the enabler, everything is ground-breaking and there’s a constant need to be innovative. Create and enhance projects in Java, Python, Angular, PHP, .NET and so mu…

Skills: Oracle BRM, Java, SQL, C/C++, Requirements Analysis

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Pre-Sales & Delivery Manager

Lisbon, Portugal · Hybrid

Senior

Make an impact by working in sectors where technology is the enabler and innovation is the key. At Celfocus, we make data actionable through Next‑Gen Intelligence - where data, AI and human creativity come together. You’…

Skills: Pre-Sales, Solutioning, Bid Management, Architecture, Consulting

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Celfocus Academy | Analytics Engineer Trainee

Lisbon, Portugal · Hybrid

Entry level

Start your journey in a learning‑driven environment, inside a fast‑paced and ever‑evolving world of tech and innovation. At Celfocus, you’ll work with diverse teams on real projects and see how ideas turn into real impac…

Skills: SQL, PL/SQL, TSQL, ETL/ELT, Data Warehousing

Celfocus logoCelfocus

Celfocus Academy | Junior Agentic Engineer

Lisbon, Portugal · Hybrid

Entry level

Start your journey in a learning‑driven environment, inside a fast‑paced and ever‑evolving world of tech and innovation. At Celfocus, you’ll work with diverse teams on real projects and see how ideas turn into real impac…

Skills: Python, Agentic AI, Workflow Automation, AI-Assisted Engineering, Data Handling

Celfocus logoCelfocus

.Net Developer

Lisbon, Portugal · Hybrid

Mid level

Make an impact by working in sectors where technology is the enabler and innovation is the key. At Celfocus, we make data actionable through Next‑Gen Intelligence - where data, AI and human creativity come together. You’…

Skills: C#, ASP.NET, .NET Core, MVC, SQL Server

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Telco Network Graph Engineer

Celfocus

Lisbon, Portugal • Hybrid

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Mid level

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  • Full-time
  • bachelor degree, postgraduate degree
  • Hybrid Way Of Working, International Projects, Career Path Exploration, Continuous Learning And Development, AI-Driven Environment, General Benefits And Perks
  • Posted 3d ago
  • ~40 hrs/week

Responsibilities

Lead the design and operation of a Network Digital Twin using graph databases to create a real-time replica of network and service topology. Develop ingestion pipelines and implement graph queries to support predictive analytics, automation, and root cause analysis.

Requirements

Requires a degree in Computer Science or related field with 2+ years of production experience in GraphDBs and proficiency in languages like Python, Java, or Scala. Knowledge of network architectures and data modeling for complex systems is essential.

Full job description

Make an impact by working in sectors where technology is the enabler and innovation is the key.

At Celfocus, we make data actionable through Next‑Gen Intelligence - where data, AI and human creativity come together.

You’ll work with multidisciplinary teams and partner with leading companies to turn data into decisions, agility and long‑term value.

Explore your way in.

The opportunity:
We are seeking a highly skilled and motivated engineer to lead the design, development, and operation of a Network Digital Twin leveraging graph databases (GraphDBs). This role is central to our efforts to build a real-time, data-driven replica of our network and service topology, enabling predictive analytics, service assurance, automation, and advanced decision-making across network operations.

You will work with network architects, data engineers, and automation teams to model multi-domain topologies (physical, logical, virtual), ingest and correlate operational data, and develop scalable and query-efficient graph-based representations of the network.

Your day-to-day:

  • Design and implement a scalable network digital twin architecture using graph databases (e.g., AWS Neptune, Neo4j, Spanner Db).

  • Model complex network and service topologies, including resources, services, devices, users, and their relationships.

  • Develop real-time and batch ingestion pipelines from inventory systems, assurance platforms, telemetry streams, and orchestration systems.

  • Define and implement Cypher queries or other graph query languages to support analytics, root cause analysis, and impact assessment.

  • Collaborate with solution architects to ensure the digital twin supports intent-based networking, automation, and AI-driven use cases.

  • Integrate with external APIs (e.g., TMF APIs, SNMP, Kafka, REST) and ensure data integrity, consistency, and completeness.

  • Contribute to the definition of graph ontology/taxonomy, including versioning, metadata tagging, and domain-specific extensions.

  • Work closely with AI/ML teams to feed the digital twin into predictive models for anomaly detection, capacity forecasting, and failure prevention.

  • Build dashboards and visualizations to explore and interact with the digital twin.

  • Maintain data security, access control, and compliance with relevant standards.

What you'll bring:

  • Bachelor’s or Master’s degree in Computer Science, Network Engineering, Data Engineering, or related field.

  • 3+ years experience working with GraphDBs (e.g., Neo4j, AWS Neptune) in production environments.

  • Knowledge of network architectures (any of IP/MPLS, SDN, 5G, transport, access, and/or cloud-native) is valued.

  • Proficiency in data modeling for complex systems and query languages like Cypher, Gremlin, SPARQL, etc.

  • Hands-on experience with network inventory systems, OSS/BSS platforms, or digital twins.

  • Familiarity with ETL processes, data pipelines, and integration frameworks (e.g., Kafka, NiFi, Apache Camel).

  • Strong programming skills in Python, Java, or Scala.

  • Knowledge of TM Forum Open APIs (especially TMF638, TMF640, TMF633) is a plus.

  • Experience with visualization tools (e.g., Neo4j Bloom, GraphXR, Gephi, or custom frontends) is also valued.

Nice to have:

  • Experience working in telecom or large-scale network environments.

  • Understanding of AI/ML integration with graph data.

  • Familiarity with cloud-native infrastructure and microservices (Kubernetes, Docker).

  • Exposure to digital twin frameworks or enterprise knowledge graphs.

  • Experience working in Agile/DevOps teams.

What’s in it for you:

• Hybrid way of working with flexibility and balance

• Opportunity to work on international projects

• Possibility to explore different roles and career paths

• Continuous learning and development opportunities

• A growing AI‑driven environment, working with the latest technologies

• A set of benefits and perks to support your day-to-day

A place for everyone

At Celfocus, we are committed to cultivate a diverse and inclusive workplace. As an equal-opportunity employer, we welcome applicants of all backgrounds, gender identities, and abilities.

If you require any adjustments during the selection process, please inform our Talent Acquisition Team.

Related keywords

GraphDBNeo4jAWS NeptuneSpanner DbCypherGremlinSPARQLDigital TwinIP/MPLSSDN5GTMF APIsKafkaNiFiApache CamelPython

About Celfocus

LinkedInVisit site
Industry
IT Services and IT Consulting
Company size
1,001-5,000 employees
Founded
2000
Headquarters
Lisbon, Parque das Nações
LinkedIn followers
45,505

Celfocus is pioneering the future of business through Next-Gen Intelligence — the convergence of data, AI, and human creativity to build more autonomous and adaptive organizations. Guided by our core belief — Making Data Actionable — we partner with leading companies to co-create intelligent solutions that turn data into insight, agility, and business value. Operating in over 25 countries, we bring together business experts, data scientists, and AI engineers to turn complexity into clarity and vision into measurable impact. Founded in 2000, Celfocus is part of Novabase, listed on Euronext Lisbon.

Offices: Av D. João II, 34, Lisbon, Parque das Nações 1998-031, PT · Office 206, EIB, Building 05, second floor, Dubai, Dubai Dubai, AE · Newbury, Newbury RG14 2PZ, GB · Rua Daciano Baptista Marques 245, 7, Oporto, Oporto 4400-617, PT · De Colonel, Stationsplein 8-K, 6221 BT Maastricht, Netherlands, Maastricht, NL

Business Intelligence & Customer InsightSPMBusiness Support SystemsEnterprise Application IntegrationNext Generation Intelligent NetworksIT ConsultingOnlineRetail and MobilePortalsTelecommunications
View all jobs at Celfocus

About Celfocus

LinkedInVisit site
Industry
IT Services and IT Consulting
Company size
1,001-5,000 employees
Founded
2000
Headquarters
Lisbon, Parque das Nações
LinkedIn followers
45,505

Celfocus is pioneering the future of business through Next-Gen Intelligence — the convergence of data, AI, and human creativity to build more autonomous and adaptive organizations. Guided by our core belief — Making Data Actionable — we partner with leading companies to co-create intelligent solutions that turn data into insight, agility, and business value. Operating in over 25 countries, we bring together business experts, data scientists, and AI engineers to turn complexity into clarity and vision into measurable impact. Founded in 2000, Celfocus is part of Novabase, listed on Euronext Lisbon.

Offices: Av D. João II, 34, Lisbon, Parque das Nações 1998-031, PT · Office 206, EIB, Building 05, second floor, Dubai, Dubai Dubai, AE · Newbury, Newbury RG14 2PZ, GB · Rua Daciano Baptista Marques 245, 7, Oporto, Oporto 4400-617, PT · De Colonel, Stationsplein 8-K, 6221 BT Maastricht, Netherlands, Maastricht, NL

Business Intelligence & Customer InsightSPMBusiness Support SystemsEnterprise Application IntegrationNext Generation Intelligent NetworksIT ConsultingOnlineRetail and MobilePortalsTelecommunications
View all jobs at Celfocus

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