Company profile

Upstream Tech Stack

Mobile marketing and operator-billed digital subscriptions for emerging markets

Software Development London, 201–500 employees Founded 2001 Privately Held

Upstream runs mobile marketing and carrier-billed digital subscription services across emerging markets on a Java/Spring backend with Kafka, RabbitMQ, Redis and Hazelcast, a stack built for high-volume, low-latency transaction traffic. Accelerating, engineering-led hiring centers on South Africa, where job posts point to immutable, container-based deployment work and a parallel push to grow regional revenue.

Tech Stack 40 technologies

Core StackJira Google Ads Google Analytics VMware AWS Ansible Terraform Jenkins GitLab CI/CD Docker Kubernetes Java Python Go PHP SAP Cisco Spring Hibernate Maven RabbitMQ Kafka Redis Elasticsearch Couchbase Meta Ads Manager Azure Checkpoint Hazelcast Ehcache+10 more

What Upstream Is BuildingChallenges and projects from their job posts

◆Challenges

Scaling infrastructure while keeping production stable
Optimizing cloud infrastructure cost
Managing security incidents and vulnerability lifecycle
Expanding revenue in South Africa
IFRS reporting and financial consolidation
Tax and regulatory compliance posture

▲Active Projects

Immutable, container-based deployment platform
High-volume, low-latency mission-critical applications
Channel and account-specific marketing strategy
Automating operational tasks and procedures

Hiring Activity

Accelerating10 roles · 10 in 30d

Department

Engineering

Marketing

Finance

Ops

Sales

Security

Support

Seniority

Mid

Junior

Senior

Manager

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About Upstream

Upstream is a privately held mobile technology company founded in 2001 and headquartered in London, with 201–500 employees. It runs performance-driven, omnichannel mobile marketing and digital acquisition programs, alongside operator billing, digital subscriptions, mobile commerce and ad fraud protection. Its clients include telecom operators and brands in insurance, education, FMCG and retail. Operations span markets in Latin America, Africa, the Middle East and South-East Asia.

HeadquartersLondon,

Company Size201–500 employees

Founded2001

Hiring MarketsSouth Africa

Frequently Asked Questions

What tech stack does Upstream use?

Upstream runs Java, Python, Go and PHP on AWS and Azure, using Kubernetes, Docker, Terraform, Ansible, Jenkins and GitLab CI/CD. Its data layer includes Kafka, RabbitMQ, Redis, Elasticsearch, Hazelcast and Couchbase.

Where is Upstream hiring?

Upstream's current hiring is focused on South Africa. Hiring is accelerating, led by engineering, with smaller openings in marketing, finance, operations, sales, security and support.

What is Upstream working on?

Job posts point to an immutable, container-based deployment platform, high-volume low-latency mission-critical applications, task automation, and new channel and account-based marketing strategies.

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How this profile is built

Upstream's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.