O-RAN rApp & xApp Developer

AWTG Ltd.; Greater London; Hybrid; GBP 65,000 - 90,000; Full time

Job summary

AWTG Ltd. in London is seeking a mid-level O-RAN rApp & xApp Developer to join our O-RAN engineering team, delivering rApps for the Non-RT RIC and xApps for the Near-RT RIC, integrating with SMO services and data layers.

The role requires 3-5 years in software development, Python/Go, Docker/Kubernetes, REST APIs, and experience with 5G NR RAN, E2/O1/R1 interfaces, and CI/CD pipelines; on-site Monday to Friday.

Qualifications

• 3-5 years of software development experience in relevant domains.

Responsibilities

• Design, develop and test rApps for Non-RT RIC to consume data and issue A1 policies.

Skills

Python

Go

O-RAN architecture

5G NR RAN protocols

REST APIs

Git

Linux

Analytical thinking

Education

Bachelor's or Master's degree in Computer Science / Telecommunications / Electronic Engineering

Tools

Docker

Kubernetes

Helm

Redis

InfluxDB

MariaDB

Job description

AWTG LTD is seeking a mid-level O-RAN rApp & xApp Developer to join our O-RAN engineering team. This role spans software development across both the Non-RT RIC (rApps) and Near-RT RIC (xApps) layers of the O-RAN architecture, building intelligent applications that automate and optimise radio access network behaviour.

Key Responsibilities

• Design, develop and test rApps for the Non-RT RIC / SMO layer, using the R1 interface to consume data and issue A1 policies to the Near-RT RIC.
• Design, develop and test xApps for the Near-RT RIC, using the E2 interface to implement near-real-time control loops.
• Integrate rApps and xApps with SMO services, data pipelines and data layers (e.g. the R-NIB).
• Collaborate with RAN and network engineers to translate use cases into working applications.
• Design and implement CI/CD pipelines for automated build, test and deployment of RIC applications.
• Ensure compliance with relevant O-RAN Alliance specifications (A1, E2, O1, R1) and coding standards.
• Participate in code reviews, unit/integration testing, and technical documentation.
• Troubleshoot and debug issues across the RIC platforms and application stack.

Required Skills & Experience

• 3-5 years' software development experience, with strong programming skills in Python and Go.
• Solid understanding of the O-RAN architecture: SMO, Non-RT RIC, Near-RT RIC, and the A1, O1, R1 and E2 interfaces, including E2 Service Models.
• Knowledge of 5G NR RAN protocols and 3GPP specifications.
• Experience with Near-RT RIC Message Routing and Shared Data Layer (SDL).
• Experience working with multiple databases (e.g. Redis, Influx, MariaDB).
• Hands-on experience with the O-RAN SMO/Non-RT and Near-RT RIC platforms.
• Experience developing, packaging and deploying containerised applications with Docker, Kubernetes and Helm.
• Working knowledge of REST APIs and microservices architecture.
• Proficiency with Git and collaborative development workflows.
• Comfortable working in a Linux environment.
• Strong analytical and problem-solving skills, with the ability to work independently and in a team.

Qualifications

• Bachelor's or Master's degree in Computer Science, Telecommunications, Electronic Engineering or a related field.

Candidates need to be available to workMonday to Friday on-site.