Upstream
upstreamsystems.com
Actively hiring
Fraud Detection
Marketing Automation
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People
Growth
Offices
Jobs
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How Upstream hires
Truth index
A 95/100
Median time to fill
105 days
Ghost roles
0%
Stale roles
0%
Reposted roles
0%
Upstream scores A on the Alion truth index (A is best, E worst), measured over 7 open roles re-checked against its own hiring board: 0% look like ghost listings, 0% have gone stale and 0% are the same role posted again. Its roles close in a median of 105 days. It measures how much of what this employer publishes turns into a real, finite search - not the employer as a workplace. How the index is computed
News
Can Header Enrichment survive Chrome's HTTPS era?
The post Can Header Enrichment survive Chrome's HTTPS era? appeared first on Upstream.
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Η Intersel εξαγοράζει την Upstream - Ο κ. Salim Khoury αναλαμβάνει Εκτελεστικός Πρόεδρος
Η εξαγορά αυτή σηματοδοτεί επίσης την ολοκλήρωση της δεκαετούς παρουσίας της Actis ως κύριου επενδυτή της Upstream.
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5 marketing automation capabilities that are an absolute must for marketers
The post 5 marketing automation capabilities that are an absolute must for marketers appeared first on Upstream.
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Sponsored club and online betting: a sure winner - if there was ever one.
The post Sponsored club and online betting: a sure winner - if there was ever one. appeared first on Upstream.
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Πλέσσα (Upstream) στο CNN Greece: Κομβικός ο ρόλος των δομών ανθρώπινου δυναμικού για την ανάπτυξη
Για τον κομβικό ρόλο που καλούνται να φέρουν εις πέρας οι δομές ανθρώπινου δυναμικού των σύγχρονων επιχειρήσεων, μίλησε στο CNN Greece η κ. Ντένη Πλέσσα, Head...
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One world. One partner. One-stop, digital acquisitions shop.
How do you handle media management? How do you ensure that the digital acquisitions you make will be there tomorrow? This is where Marketing Technology (MarTech) comes into play.
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Unlock each channel's full potential with multichannel orchestration
The post Unlock each channel's full potential with multichannel orchestration appeared first on Upstream.
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Why one SMS is worth 40 emails
The global economic slowdown is being felt across every sector as businesses and consumers tighten their belts, says Chrysa Karamanidi, chief innovation officer at Upstream. Karamanidi adds that for retailers, the impact has been particularly stark.
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Make shoppers fall in love with your brand: 4 ways triggered messaging drives conversions
The post Make shoppers fall in love with your brand: 4 ways triggered messaging drives conversions appeared first on Upstream.
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Commentary: European Commission Approves Digital Advertising Joint Venture, Dubbed 'TrustPid'
The European Commission, last Friday, approved the creation of a joint venture between European operators Deutsche Telekom AG Orange, Telefónica and Vodafone
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Tech stack
Technologies named in job postings at Upstream over the last 12 months, by layer, with the share of postings for each.
Technologies in use
47
Postings analysed
11
Stack modernity
73/100
Languages
Java45%
SQL45%
Python36%
Go18%
Frameworks & libraries
Hazelcast27%
Hibernate27%
Spring Framework27%
Express9%
Databases
ElasticSearch55%
Redis55%
Couchbase27%
PostgreSQL27%
Cloud & platforms
Linux36%
Apache Kafka27%
Kubernetes27%
RabbitMQ27%
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Full Upstream tech stack
47 technologies · by team · pay by technology · changes · similar stacks
Growth
Hiring Momentum
77/100
Scaling fast
Open positions
10
5 opened / 4 closed in 30 days
Median time-to-fill
106 days
faster than 13% of the market
ATS activity
Every ~4 hours
Today
Hiring Dynamics
+100%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
DevOps
29% ▲
Management
29% ▲
Finance
14% ▼
Legal
14% ▲
Marketing
14% ▼
Activity Timeline
Added Node JS to stack
Oct 2026
Added TypeScript to stack
Oct 2026
Added React.js to stack
Oct 2026
Added Next.js to stack
Oct 2026
Added Memcached to stack
Oct 2026
Added JavaScript to stack
Oct 2026
Added Express to stack
Oct 2026
Added Scrum to stack
Sep 2026
Added Unix to stack
Sep 2026
Added TCP/IP to stack
Sep 2026
Added SIEM to stack
Sep 2026
Added DLP to stack
Sep 2026
Offices
Where the company hires and what each office is for
Cities
3
Hiring now
2
Countries
2
Busiest office
Gerakas
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Headquarters
Builds here
Office with open vacancies
No open vacancies right now Tap a pin for the office
Athens
Greece
HQ
Gerakas
Greece
Engineering / R&D
9 open roles 6 posted in 90 days 44% engineering
hires for Backend, DevOps, Legal
Johannesburg
South Africa
Sales office
1 open roles 1 posted in 90 days
hires for Marketing
Jobs
In office • Full-Time • Gerakas
Python
Go
Java
PHP
Bash
PostgreSQL
Redis
Cassandra
Couchbase
ElasticSearch
DevOps
Terraform
Ansible
Helm
Loki
VMWare
Prometheus
GitLab CI
Azure
CI/CD
Jenkins
AWS
Docker
Kubernetes
Grafana
GitLab
Linux
Management
Agile
Apply
≈ $27k – $76k per year (Estimated) • In office • Full-Time • Gerakas
Python
Go
Java
PHP
PostgreSQL
Redis
Cassandra
Couchbase
ElasticSearch
DevOps
Terraform
Ansible
Helm
Loki
VMWare
Prometheus
GitLab CI
Azure
CI/CD
Jenkins
AWS
Docker
Kubernetes
Grafana
GitLab
Linux
Management
Agile
Apply
In office • Full-Time • Gerakas
Java
SQL
Spring Framework
Maven
Hibernate
Hazelcast
Databases
Redis
RabbitMQ
ElasticSearch
Apache Kafka
DevOps
CI/CD
Git
Management
Agile
Apply
≈ $27k – $81k per year (Estimated) • In office • Full-Time • Gerakas
Java
SQL
Spring Framework
Maven
Hibernate
Hazelcast
Databases
Redis
RabbitMQ
Couchbase
ElasticSearch
Apache Kafka
DevOps
CI/CD
Git
Management
Agile
Apply