Site Reliability Engineer (Apprentice) - France

Horizon Trading Solutions ?

• A Fintech specializing in the design of a platform facilitating various trading activities on electronic financial markets (automation of certain activities (Market Making, Algo Trading...), optimal order management and execution (Agency Trading, Order and Execution Management System…),

• State-of-the-art software deployed on-site or as Managed Services,

• An ambitious product roadmap: Machine Learning, AI, Crypto Currencies, Low Latency…

• A human-sized company (120 employees) where you can make a difference,

• An international company present in 6 countries to serve clients spread across 26 countries,

• A committed company: B-Corp certified, partner of Planet Tech’care, Ethical IA and Lakaa, endowment fund,

• A recognized company in its field: Best Sell Side OMS 2025, Best Multi-Asset Trading System 2025, Best trading solution for listed securities 2022 and 2023...

What you will do with us (Spoiler: it's technically exciting!)

• Design and implement a high-performance and scalable infrastructure: participate in the creation and deployment of critical infrastructure for our managed services offering, integrating hosting, exchange connectivity, and market data management.

• Deploy robust and optimized solutions: work on various environments (on-premises, colocation, cloud) within a global distributed infrastructure, meeting high performance and minimal latency requirements.

• Modernize our technological ecosystem: migrate existing services to an architecture based on microservices and containers (Docker, Kubernetes), while improving our deployment and integration stack.

• Ensure platform reliability: automate maintenance tasks, implement real-time monitoring, perform proactive checks, and ensure necessary updates and patches.

• Strengthen the security of our systems: deploy innovative solutions to protect our hosted platforms and ensure their compliance with security standards, particularly SOC2.

• Ensure process adherence: rigorously apply change management procedures (CAB, "four-eyes validation", temporary access management).

• Share and promote best practices: actively participate in technological awareness, standardization of tools and methods, and collaborate with experts in an Agile and DevOps environment.

• Collaborate in an international framework: interact with teams spread across multiple time zones and work on global projects involving Horizon, its clients, and partners.

Your essentials:

• The willingness to work from Sunday to Friday inclusive to ensure optimal coverage for our clients,

• Administration of Linux systems (RHEL) and scripting (bash, python, Gitlab, Ansible).

• Python development

• CI-CD configuration and associated tools (e.g. Gitlab CI, ArgoCD or equivalent)

• Docker or Kubernetes deployments and configuration

• Use of a monitoring solution (ideally Datadog or equivalent)

• First experience with a Cloud service provider (ideally Azure)

• Knowledge in:

  • On-prem and Cloud architectures

  • Network: VLAN, IP routing, BGP, firewalls (VPN, rules)

  • Alerting systems and procedures

  • Agile and DevOps methodologies

Your superpowers (if you have them, we love you even more):

• Networking skills: VLAN, IP routing, firewalls (VPN, rules)

• Experience with infrastructure-as-code (e.g. Terraform, Cloud init)

• Good foundation in deployment or development of Python applications (Django) or Java (Spring, Quarkus)

• PostgreSQL database administration

• Experience with Prometheus, InfluxDB, Telegraf, or Grafana

• Experience in a "follow the sun" work model

• Knowledge of trading or financial application operations

• Knowledge of one or more security repositories and audit processes like SOC2

• Proficiency in written and spoken English is a plus

Why join us?

• Flexibility and balance: remote work up to 1 day per week

• Realize your tech dreams: Machine Learning, AI, crypto, microservices, ultra-low latency... With us, you can explore them thoroughly.

• Immediate impact: work on critical solutions used worldwide.

• Grow with us: stimulating projects and passionate experts by your side.

• Compensation: Compensation and benefits are determined in accordance with our remuneration policy and the provisions of the Syntec collective agreement.

So don't hesitate and join the Horizon adventure!

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