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About the Role

Design and implement resilient, scalable, secure, and fault-tolerant architectures for the Network API, xSIM Management System, and Recording Platforms. Develop new features, support existing systems, and contribute to continuous improvement in a collaborative environment.

Responsibilities

Provide accurate effort estimates to support roadmap planning and effective expectation management.
Design and implement resilient, scalable, secure, and fault-tolerant architectures to ensure system reliability and performance.
Develop new features and support existing systems across the Network API, xSIM Management System, and Recording Platforms.
Contribute with small, incremental enhancements that seamlessly integrate into the established codebases.
Maintain and update existing solutions to keep them modern, efficient, and reliable.
Collaborate with team members to ensure smooth development processes and shared understanding.
Write and maintain comprehensive tests to ensure fast regression and reliable validation of new features.
Implement procedures and metrics to enable effective monitoring and observability of platform contributions.
Participate in code reviews to promote high standards of code quality, readability, and maintainability.
Take ownership of the quality and outcomes of your work, ensuring fully functional end-to-end flows.
Create and maintain accurate, up-to-date technical documentation.
Actively contribute to team discussions, with a mindset for continuous improvement and openness to new ideas or technologies.

Requirements

6+ years of professional experience in backend development, preferably with Go (Golang).
Strong Java experience with willingness to learn Go is also welcome.
Strong understanding of concurrency models, with practical experience in implementing asynchronous workflows, inter-process communication, and synchronisation techniques.
Skilled in designing, building, and consuming RESTful APIs, following best practices for API design and performance optimisation.
Proven experience working with databases, both relational (e.g., PostgreSQL) and non-relational (e.g., Redis, MongoDB, DynamoDB), including data modelling, query optimisation, and performance tuning.
Experienced in writing unit tests, integration tests, and benchmarks, with a test-driven development mindset.
Comfortable with networking protocols and distributed communication patterns (e.g., gRPC, WebSockets, TCP/UDP).
Experienced in building scalable microservices architectures and distributed systems.
Knowledgeable in applying software engineering best practices and design patterns for maintainable, testable code.
Skilled in using DevOps tools and practices, including Docker, CI/CD pipelines, and Infrastructure as Code.
Familiar with Git workflows and collaborative development processes such as pull requests, code reviews, and agile methodologies.
Demonstrated accountability for technical outcomes and ownership of end-to-end feature delivery.
Effective communicator in English, both written and verbal, suitable for a remote and largely asynchronous work environment.

Skills

Go (Golang)
Java
concurrency models
asynchronous workflows
inter-process communication
synchronisation techniques
RESTful APIs
API design
performance optimisation
PostgreSQL
Redis
MongoDB
DynamoDB
data modelling
query optimisation
performance tuning
unit tests
integration tests
benchmarks
test-driven development
networking protocols
gRPC
WebSockets
TCP/UDP
microservices architectures
distributed systems
software engineering best practices
design patterns
Docker
CI/CD pipelines
Infrastructure as Code
Git workflows
pull requests
code reviews
agile methodologies
idiomatic Go code
Go interfaces
Go structs
Go composition
Go error handling
pprof
trace
event-driven architectures
Kafka
RabbitMQ
ActiveMQ
Kubernetes
AWS
GCP
Azure
Oracle Cloud
cloud-native applications
Prometheus
Grafana
MSML
SIP

Location

remote

Work Type

remote
full-time

Experience Level

6+ years of professional experience

Benefits

Growth Opportunities
Major Transaction Exposure
Work with a Talented Team
Dynamic Work Environment
Professional Development
International Experience
Open Communication Culture
Get Things Done Attitude

About the Company

1GLOBAL is a technology-driven global mobile communications provider, delivering global connectivity solutions to enterprises and consumers.
Powered by a best-in-class telecom platform with its own owned and operated global mobile core network in 15 countries, fully fledged in-house developed eSIM technology, and an extensive portfolio of telecom licenses; 1GLOBAL operates as a fully regulated telecommunications provider across 43 countries worldwide.
The company serves many of the world’s leading banks, multinational enterprises, global retailers and digital-first businesses, including neo-banks, global fast moving consumer goods companies, travel leaders, and payment service providers.
Today, 1GLOBAL connects more than 80 million people and devices globally, enabling our customers to launch, scale, and innovate with confidence in the mobile ecosystem.
1GLOBAL is a profitable, fast-growing business. With full-year revenues in 2025 exceeding US$200 million and profits of over US$25 million, we generate strong cash flows to fund our growth allowing us to continuously invest in infrastructure, platform innovation, and global expansion.
In 2026 also the parent of the Lidl Group acquired a 10% interest in 1GLOBAL as part of a deal for Lidl to offer globally to its 180 million consumers communication services.
Recent years have marked a defining phase in 1GLOBAL’s journey, with major enterprise and mass-consumer client wins accelerating its evolution into a global mobile connectivity powerhouse, purpose-built to enable consumer brands to enter and succeed with their own aspirations to offer telecommunications services to their clients.
Founded in 2022 by experienced technology entrepreneurs, Hakan Koç and Pyrros Koussios, 1GLOBAL has rapidly emerged as a European technology leader shaping the future of global telecommunications.
It operates as a fully regulated Mobile Virtual Network Operator (MVNO) in 15 countries and as a regulated telecom operator in an additional 28 markets.
Headquartered in the Netherlands, with world-class R&D hubs in Lisbon, Berlin, and São Paulo, its team of close to 550 experts across 16 countries is united by a single ambition: to redefine global mobile connectivity through technology, scale, and execution excellence.

Equal Opportunity

1GLOBAL is an equal opportunity employer, we value your character as much as your talent.
Diversity drives our innovation, and we offer a collaborative, dynamic, and international work environment.
We are excited for you to join our mission to revolutionise connectivity globally.