Back End Developer

First Orion; Greater London; Hybrid; GBP 31,000 - 54,000; Full time

Benefits offered by this job

Competitive salary package

Paid time off & public holidays

Pension / retirement benefits

Annual home-country flight allowance (

Flexible working arrangements

Professional growth opportunities

Job summary

First Orion is hiring an experienced Backend Engineer to own core microservices across our platform. You will work on call treatment orchestration, brand data, analytics, and billing within a hexagonal, event‑driven architecture.

We seek 5+ years in backend or software engineering, strong Java 21 and Spring Boot experience, and proficiency with PostgreSQL, Redis, and Kafka. This is a distributed, collaborative role with regional flexibility in the UK or UAE.

Qualifications

• 5+ years of professional backend or software engineering experience.
• Strong experience with Java 21.
• Experience building services with Spring Boot.
• Hands-on experience with PostgreSQL.
• Experience working with Redis and Kafka.
• Understanding of microservice and event-driven architecture.
• Experience designing, building, testing, and supporting production services.
• Strong problem-solving and communication skills.
• Ability to work effectively in a collaborative, distributed environment.

Responsibilities

• Build, enhance, and own core microservices across the First Orion platform.
• Develop services supporting call treatment orchestration, brand data, analytics, and billing.
• Design and implement solutions using hexagonal and event‑driven architecture patterns.
• Build scalable, reliable backend services using Java and Spring Boot.
• Work with relational databases, caching technologies, and event-streaming platforms.
• Contribute to technical design decisions and help improve reliability and maintainability of services.
• Troubleshoot issues and support services throughout the development lifecycle.
• Collaborate with distributed engineering teams to deliver high‑quality solutions.

Skills

Java 21

Spring Boot

Gradle Kotlin DSL

PostgreSQL

Redis

Kafka

Microservices

Event-driven

Problem-solving

Communication

Distributed teams

Tools

Gradle

Job description

Location: Dubai, UAE (Onsite) or UK (Remote)

Employment Type: Full-time

About Us:

First Orion is a telecommunications technology company focused on restoring trust and transparency to phone communications. Founded in 2008 and headquartered in North Little Rock, Arkansas (USA), First Orion provides solutions that protect consumers from scam and spoofed calls while enabling businesses to deliver trusted, branded calling experiences.

With teams across North America, Europe, and the Middle East, First Orion operates in a highly collaborative, distributed environment that brings together world-class engineering, operations, and customer‑focused talent. This role will work closely with colleagues across multiple regions, contributing to products and services that help millions of consumers and businesses communicate with confidence.

About the role:

We are looking for an experienced Backend Engineer to help build and own core microservices across our platform. This is a hands‑on development role focused on services that support call treatment orchestration, brand data, analytics, and billing.

You’ll work within a hexagonal, event‑driven architecture and collaborate closely with engineering teams across First Orion to develop scalable, reliable services that support carrier‑grade communication solutions.

This is an individual contributor role with no direct people management responsibilities.

What you’ll do:

• Build, enhance, and own core microservices across the First Orion platform
• Develop services supporting call treatment orchestration, brand data, analytics, and billing
• Design and implement solutions using hexagonal and event‑driven architecture patterns
• Build scalable, reliable backend services using Java and Spring Boot
• Work with relational databases, caching technologies, and event‑streaming platforms
• Contribute to technical design decisions and help improve the reliability and maintainability of services
• Troubleshoot issues and support services throughout the development lifecycle
• Collaborate with distributed engineering teams to deliver high‑quality solutions

What you’ll need:

• 5+ years of professional backend or software engineering experience
• Strong experience with Java 21
• Experience building services with Spring Boot
• Experience with Gradle using Kotlin DSL
• Hands‑on experience with PostgreSQL
• Experience working with Redis and Kafka
• Understanding of microservice and event‑driven architecture
• Experience designing, building, testing, and supporting production services
• Strong problem‑solving and communication skills
• Ability to work effectively in a collaborative, distributed environment

Nice to have:

• Familiarity with hexagonal architecture, including ports and adapters
• Experience with MinIO or S3‑compatible object storage
• Experience using Vault or similar secrets‑management tools
• Experience building high‑throughput or low‑latency systems
• Telecommunications or real‑time call‑flow experience

While the position primarily follows local business hours in the employee's country of employment, occasional flexibility may be required to support planned maintenance activities, project implementations, and service escalations across time zones.

This position may be based in either the United Kingdom or Dubai, UAE.

• For UK‑based employees, the salary range for this position is £30,800 - £54,100, depending on experience
• Compensation for UAE‑based employees will be discussed during the recruitment process and will depend on experience

Company Benefits

Our work environment is energetic, focused, fun, and collaborative. We've created a unique culture built on trust, transparency, and empowerment, where employees are encouraged to take ownership, make decisions, and contribute to the success of the business. Our team is passionate about what we do and driven to make a meaningful impact every day. At First Orion, everyone plays an important role in the bigger picture.

Working hours and employment terms will comply with applicable local employment laws and regulations in the country of hire.

This role may be based in either the United Kingdom or Dubai, UAE, depending on the selected candidate's location. Applicants must have the legal right to work in their country of residence.

We offer a competitive benefits package that varies by location and may include:

• Competitive salary package
• Generous paid time off and public holidays in accordance with local employment requirements
• Retirement or pension benefits where applicable
• Annual home‑country flight allowance for eligible UAE‑based employees and dependents
• Flexible working arrangements and a collaborative team environment
• Opportunities for professional growth and development within a global organization

First Orion is an equal opportunity employer and is committed to creating an inclusive environment for all employees. All qualified applicants will be considered without regard to race, religion, gender, sexual orientation, age, disability, or any other protected characteristic.

By applying for this role, you acknowledge that your personal data will be processed in accordance with First Orion's privacy policy and applicable data protection laws.