OPEN Tech Stack

IT modernization and digital transformation services for enterprise clients

IT Services and IT Consulting Levallois-Perret, Île-de-France 1,001–5,000 employees Founded 1989 Privately Held

Open is a 4,000-person IT services firm scaling aggressively—hiring 1,200+ new staff in 2025—with deep expertise in application modernization, infrastructure migration, and AI-driven transformation. The tech stack spans Java/.NET enterprise backends, big-data platforms (Spark, Hadoop, Hive), and cloud infrastructure (AWS, Azure, GCP), with active adoption of containerization (Docker, Kubernetes) and infrastructure-as-code tools (Terraform, Ansible). The hiring mix is heavily engineering-skewed (149 roles) relative to sales (7), reflecting a delivery-centric, services model rather than sales-driven motion.

Tech Stack 200 technologies

Core StackJava C# Angular .NET React Apache Spark Scala Hadoop Python Elasticsearch MongoDB Cassandra AWS Linux Windows Server Docker Kubernetes Terraform Ansible Puppet Jakarta EE Hive HBase Cloudera Hortonworks Azure GCP Bash Perl PowerShell+170 more

AdoptingAWS Kubernetes Docker Ansible dbt Azure Scrum Kanban

ReplacingHadoop Red Hat Cloudera

What OPEN Is Building

◆Challenges

Si transformation
Transforming it systems
Modernizing information system
Data migration
Reducing silos between dev and ops
Acquisition of new markets
Operations processing efficiency
Monitoring application availability
Strengthening teams
Data quality for e-business

▲Active Projects

Strategic data migration project
Client migration
Banking it transformation program
Continuity plan implementation
Automation of production deployment
Trading automation
Front office decision support tools
Digital transformation of social protection
E-business data platform
Cloud infrastructure automation

Hiring Activity

Steady230 roles · 85 in 30d

Department

Engineering

149

Data

Ops

Sales

Finance

Product

Security

Consulting

Seniority

Senior

130

Mid

Lead

Director

Junior

Manager

Notable leadership hires: FullStack Lead, Java Technical Lead, Java Fullstack Lead, Test Lead, Tech Lead

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About OPEN

Open operates as a full-service digital transformation consultancy headquartered in Levallois-Perret, France, with offices in Luxembourg and Romania. The company generated €420M in revenue in 2024 across three core service lines: IT modernization (application ecosystem redesign, legacy system transformation), infrastructure services (cloud migration, on-premises to cloud infrastructure automation), and SaaS/AI solutions deployment. Their project portfolio reflects the customer base: banking IT transformation programs, social-protection system digitalization, trading automation platforms, and e-business data infrastructure. The organization prioritizes agile delivery (Scrum/Kanban adoption) and has identified data migration, application-deployment automation, and DevOps alignment as internal operational priorities.

HeadquartersLevallois-Perret, Île-de-France

Company Size1,001–5,000 employees

Founded1989

Hiring MarketsFrance, Romania, Luxembourg

Frequently Asked Questions

What is Open's tech stack?

Open's primary stack includes Java, Jakarta EE, C#, Angular, .NET, and React for applications; Apache Spark, Hadoop, Hive, and Scala for data processing; and AWS, Azure, GCP, Kubernetes, Docker, Terraform, and Ansible for cloud and infrastructure automation.

What countries does Open operate in?

Open is headquartered in France and operates primarily across France, with additional offices in Luxembourg and Romania. Hiring is active across all three countries.