Proofpoint is an enterprise cybersecurity and compliance company specializing in human-centric security solutions. Headquartered in Sunnyvale, California (and operating as a portfolio company of Thoma Bravo), the firm provides threat protection, information protection, identity threat defense, and cloud security platforms designed to mitigate risks targeting employees, email systems, and corporate data assets.
HQ: Sunnyvale, United States • Information Security • Cybersecurity • Email Security • 1001-5000 employees
≈ $141k – $306k per year (Estimated) • Staff+ • In office (Belfast, United Kingdom) • Bachelor's Degree • Full-Time • Staff
Python
TypeScript
AI/ML
A2A
AI Agents
Anthropic
Claude
Claude Code
LangChain
LangGraph
LLM
Model Context Protocol
OpenAI
OpenAI Agents SDK
OpenAI Codex
DevOps
AWS
OpenTelemetry
≈ $140k – $302k per year (Estimated) • Staff+ • In office (Belfast, United Kingdom) • Bachelor's Degree • Full-Time • Staff
JavaScript
TypeScript
AI/ML
A2A
AI Agents
Claude
Claude Code
Model Context Protocol
OpenAI Codex
Frontend
React.js
DevOps
AWS
Design
Figma
≈ $87k – $195k per year (Estimated) • In office (Belfast, United Kingdom) • Bachelor's Degree • Full-Time
Python
TypeScript
AI/ML
A2A
AI Agents
Anthropic
Claude
Claude Code
LangChain
LangGraph
LLM
Model Context Protocol
OpenAI
OpenAI Agents SDK
OpenAI Codex
DevOps
AWS
OpenTelemetry
GitLab is a comprehensive, open-source DevSecOps platform that enables software teams to manage the entire software development lifecycle within a single application. It streamlines operations by offering integrated tools for source code management, continuous integration and deployment (CI/CD), security testing, and project planning. By consolidating the entire pipeline into one continuous workflow, it helps engineering teams accelerate code delivery, improve collaboration, and maintain strict security compliance.
HQ: San Francisco, United States • Information Technology • Cybersecurity • DevSecOps • DevOps • 1001-5000 employees • Est. 2011
≈ $87k – $166k per year (Estimated) • Equity • Senior • Remote (United Kingdom) • PhD • Full-Time • Senior
Python
Ruby
SQL
JavaScript
Ruby
RSpec
Ruby on Rails
Databases
PostgreSQL
AI/ML
Claude
Claude Code
AI Agents
OpenAI Codex
Frontend
GraphQL
Vue.js
DevOps
GitLab
Management
Slack
≈ $90k – $172k per year (Estimated) • Equity • Senior • Remote (United Kingdom) • PhD • Full-Time • Senior
ClickHouse
PostgreSQL
AI/ML
Prompt Engineering
AI Agents
DevOps
Kubernetes
GitLab
≈ $172k – $286k per year (Estimated) • Equity • Staff+ • Remote (United States, United Kingdom, Canada) • PhD • Full-Time • Staff
Go
Ruby
DevOps
CI/CD
GitLab
Blockchain Capital is one of the earliest dedicated digital asset venture firms, founded in 2013 in San Francisco. It has invested across many funds in exchanges, infrastructure, decentralised finance and consumer applications. The firm was also a pioneer of tokenised fund structures, issuing a security token to represent limited partner interests.
HQ: San Francisco, United States • Blockchain & Crypto • Est. 2013
≈ $87k – $165k per year (Estimated) • Senior • 5+ years exp • Remote (United Arab Emirates, United Kingdom, Argentina, Brazil, Canada) • Full-Time • Senior
Python
AI/ML
Anthropic SDK
Claude
Function Calling
LLM
AI Agents
Anthropic
Human-in-the-Loop
Model Context Protocol
Management
n8n
≈ $87k – $166k per year (Estimated) • Senior • Remote (United Arab Emirates, United Kingdom, Argentina, Brazil, Canada) • Full-Time • Senior
Python
AI/ML
Claude
LLM
AI Agents
Anthropic
Human-in-the-Loop
LLM Guardrails
Model Context Protocol
Web3
Staking
Management
n8n
≈ $86k – $164k per year (Estimated) • Senior • 8+ years exp • Remote (United Arab Emirates, United Kingdom, Argentina, Brazil, Canada) • Full-Time • Senior
Python
AI/ML
Anthropic SDK
Claude
AI Agents
Anthropic
Human-in-the-Loop
Model Context Protocol
Cybersecurity
GDPR
Management
n8n
Kalepa delivers critical risk insights and decision-ready quotes for every submission in minutes. Move faster, act decisively, and consistently select the most profitable risks - across every line you write.
Warsaw • New York • Salt Lake City • Artificial Intelligence • Financial Services • Insurance • Est. 2018
$100k – $185k per year • Equity • Staff+ • 8+ years exp • Remote (Europe) • Staff
Python
Databases
PostgreSQL
AI/ML
LLM
DevOps
Amazon EC2
AWS
AWS Lambda
$100k – $185k per year • Equity • Staff+ • 8+ years exp • Remote (Europe) • Staff
Python
Databases
PostgreSQL
DevOps
Amazon EC2
AWS Lambda
AWS
$80k – $165k per year • Equity • Senior • 5+ years exp • Remote (Europe) • Senior
Python
Databases
PostgreSQL
DevOps
Amazon EC2
AWS Lambda
AWS
Zencargo is a London company founded in 2017 that combines digital freight forwarding with supply chain software. Its platform gives importers visibility of shipments and recommends how to route and fund inventory. The company works with consumer brands and retailers moving goods from Asia into Europe.
HQ: London, United Kingdom • Freight Forwarding • Supply Chain • Transportation & Logistics • 51-200 employees • Est. 2017
Remote (Europe) • Full-Time
Shenzhen • Remote (United States, China, United Kingdom) • Full-Time
SpyCloud is a cybersecurity company that specializes in identity protection and threat intelligence. The company provides solutions for enterprise protection, consumer risk protection, and cybercrime investigations. SpyCloud's services include automated account takeover (ATO) prevention, post-infection remediation, ransomware prevention, session hijacking prevention, threat actor attribution, fraud prevention, dark web monitoring, and penetration testing.
Austin • Washington • Huntsville • Events & Ticketing • Artificial Intelligence • Cybersecurity
$131k – $170k per year • Senior • Austin • Remote (United States, United Kingdom) • PhD • Full-Time • Senior
Go
Python
TypeScript
JavaScript
Databases
Databricks
PostgreSQL
AI/ML
AI Agents
AWS Bedrock
LangGraph
LangChain
LLM Evaluation
LLM Guardrails
LLM
Spark
Frontend
React.js
Material UI
DevOps
Amazon EC2
AWS
AWS Lambda
CI/CD
GitHub Actions
Amazon ECS
API Gateway
GitHub
Docker
Rest API
Terraform
Best AI recruitment software with built-in CRM for executive search firms. Stardex combines the best ats system with AI recruiting tools, candidate tracking, and client management in one platform. Built for recruiters and agents of recruiters.
Amsterdam • New York • Cybersecurity • Artificial Intelligence • Human Resources • 51-200 employees
$60k – $90k per year • Equity 0.1–0.8% • Amsterdam • Remote (United States, Germany, France, United Kingdom, Canada) • Full-Time
SQL
TypeScript
AI/ML
Claude
Claude Code
Cursor
Analytics
ETL/ELT
Wingtra is a Swiss drone company founded in 2016 as a spin-off of ETH Zurich. Its WingtraOne vertical take-off aircraft maps large areas at survey-grade accuracy for mining, construction and agriculture. The company sells through a global distribution network across dozens of countries.
HQ: Zurich, Switzerland • Electronic Components • Drones & UAVs • Hardware • Est. 2016
≈ $107k – $169k per year (Estimated) • Remote (Europe) • Bachelor's Degree • Full-Time
TypeScript
JavaScript
Databases
PostgreSQL
Frontend
Next.js
React.js
DevOps
CI/CD
Marketing
HubSpot
Affirm is a U.S. fintech company founded in 2012 and headquartered in San Francisco. It offers buy now, pay later and installment payment products that let consumers split purchases into transparent, fixed payments. The company also provides merchant tools and a consumer app to support checkout financing and payment management.
HQ: San Francisco, United States • Financial Services • Lending • FinTech • 1001-5000 employees • Est. 2012
$192k – $257k per year • Equity • Staff+ • 8+ years exp • Remote (United Kingdom, Poland, Spain) • Internship • Staff
Kotlin
Python
Databases
MySQL
AI/ML
Spark
DevOps
AWS
Kubernetes
≈ $104k – $182k per year (Estimated) • Equity • Staff+ • 8+ years exp • Remote (United Kingdom, Poland, Spain) • Internship • Staff
Kotlin
Python
Databases
MySQL
AI/ML
Spark
DevOps
AWS
Kubernetes
$163k – $228k per year • Equity • Senior • 4+ years exp • United Kingdom • Remote (United Kingdom) • Internship • Senior
Kotlin
Python
Databases
MySQL
Mobile
Declarative UI
DevOps
AWS
Kubernetes
MetalBear builds mirrord for AI-powered teams. Run code against a real cluster from line one. 10× faster dev cycles, zero per-developer environment costs.
London • New York • Sydney • Information Technology • Software • Virtualization • DevOps • Artificial Intelligence
≈ $67k – $158k per year (Estimated) • Equity • Middle • 3+ years exp • Remote (United Kingdom) • Full-Time • Middle
Rust
AI/ML
AI Agents
DevOps
Docker
GitOps
Kubernetes
≈ $67k – $158k per year (Estimated) • Equity • Middle • 3+ years exp • London • Remote (United Kingdom) • Full-Time • Middle
Rust
AI/ML
AI Agents
DevOps
Docker
GitOps
Kubernetes
New York • Seattle • Software • Data & Analytics • 51-200 employees
$70k – $140k per year • Equity 0–0.2% • Junior • 1+ year exp • Remote (United Kingdom, Portugal) • Full-Time • Junior
Node JS
TypeScript
Node JS
Prisma
AI/ML
Gemini
LangChain
Langfuse
OpenAI
Frontend
React.js
shadcn/ui
Tailwind CSS
DevOps
ArgoCD
AWS
CI/CD
Kubernetes
SigNoz
Analytics
Tableau
Citi is a leading global financial services company headquartered in New York City, offering a broad range of banking, investment, and wealth management services to consumers, corporations, and institutions. As one of the world's largest banking institutions, it operates across more than 160 countries and jurisdictions, serving as a critical facilitator of global commerce. Through its primary consumer division, Citibank, alongside its institutional businesses, the company provides everyday banking, credit cards, capital markets solutions, and cross-border payment infrastructure worldwide.
HQ: New York, United States • Credit Cards • Financial Services • Banking • 1001-5000 employees • Est. 1900
≈ $64k – $178k per year (Estimated) • Executive • Remote/Hybrid (Belfast, United Kingdom) • Bachelor's Degree • Full-Time • Senior
Java
SQL
Java
Gradle
Maven
Spring Boot
Spring Data JPA
Spring Framework
Spring MVC
Spring Security
DevOps
Bitbucket
CI/CD
Docker
Git
OpenShift
TeamCity
Amazon ECS
Management
Jira
≈ $66k – $184k per year (Estimated) • Executive • Remote/Hybrid (Belfast, United Kingdom) • Bachelor's Degree • Full-Time • Senior
Java
SQL
C#
C++
Databases
Apache Kafka
Db2
Oracle
RabbitMQ
AI/ML
Hadoop
DevOps
Docker
Kubernetes
Rest API
≈ $66k – $183k per year (Estimated) • Executive • Remote/Hybrid (Belfast, United Kingdom) • Full-Time • Architect
Java
Perl
C++
Management
Confluence
Mindrift is an expert-sourcing and AI training platform owned by Toloka (a data services enterprise owned by Nebius Group, Nasdaq: NBIS), operating primarily out of Amsterdam, Netherlands. Launched by Toloka CEO and founder Olga Megorskaya to elevate crowd-sourced data generation into high-level human feedback, Mindrift operates on a B2B data-as-a-service (DaaS), custom enterprise AI training contract, and freelance expert marketplace model.
HQ: Amsterdam, Netherlands • Professional Services • Data Entry & Processing • Cybersecurity • 1001-5000 employees • Est. 2014
up to $90k per year • Senior • 5+ years exp • Remote (United Kingdom) • Freelance • Senior • English: C1
JavaScript
Python
Python
Beautiful Soup
AI/ML
OpenRouter
LangChain
LLM
DevOps
AWS
Docker
GitHub
QA
Selenium
Testlio is an AI-powered crowdsourced software testing and quality assurance (QA) platform headquartered in Austin, Texas, with operational origins in Tallinn, Estonia. Founded in 2012 by Kristel Kruustük and Marko Kruustük, the Series B enterprise has raised over $19 million in venture backing from investors including Spring Lake Equity Partners and Techstars.
HQ: Austin, United States • Software • Information Technology • Quality Assurance • Est. 2012
Equity • Lead • 15+ years exp • Remote (United Kingdom, Poland) • Freelance • Architect • English: C1
LLM
LLM Guardrails
DevOps
AWS
CI/CD
Cybersecurity
ISO 27001
Gradle by Develocity is the open source build system for Java, Android, and Kotlin developers.
≈ $114k – $237k per year (Estimated) • Equity • Staff+ • Remote (Europe) • Staff • English
Java
Kotlin
Python
JavaScript
Java
Gradle
Maven
Micronaut
Quarkus
AI/ML
AI Agents
Context Engineering
Frontend
npm
Mobile
JUnit
DevOps
AWS
Docker
Kubernetes
Motorola Solutions is a global leader in public safety and enterprise security solutions, specializing in land mobile radio communications, video security, access control, and command center software. Created in 2011 following the spin-off of Motorola's mobile phone division, the Chicago-based company primarily serves law enforcement, emergency medical services, government agencies, and commercial enterprises. Its integrated ecosystem connects critical communications, AI-powered video analytics, and emergency dispatch systems to help organizations safeguard communities and operations.
HQ: Chicago, United States • Government • Military • Law Enforcement • Military Communication • 1001-5000 employees • Est. 2011
≈ $69k – $131k per year (Estimated) • Equity • Senior • 5+ years exp • Glasgow • Remote (United Kingdom) • Relocation • Bachelor's Degree • Full-Time • Senior
C#
Java
JavaScript
Kotlin
Swift
Frontend
React.js
Mobile
React Native
Alpaca is a developer-first financial infrastructure, clearing, and brokerage API enterprise headquartered in San Mateo, California. Founded in 2015 by Yoshi Yokokawa and Hitoshi Harada, the company has raised over $320 million in venture funding - including a $150 million Series D at a $1.15 billion valuation led by Drive Capital, alongside Citadel Securities, Portage, and Horizons Ventures.
HQ: San Mateo, United States • Cybersecurity • Blockchain & Crypto • Financial Services • FinTech • Capital Markets • Est. 2015
Equity • Remote (Europe)
C++
Go
Java
Python
Rust
Scala
AI/ML
Spark
DevOps
AWS
Heroku
Equity • Senior • 4+ years exp • Remote (Europe) • Senior
C++
Go
Rust
SQL
DevOps
GCP
Google GKE
Kubernetes
CI/CD
Equity • Senior • Remote (Europe, North America) • Senior
C++
Go
Java
Python
Rust
Scala
AI/ML
Spark
DevOps
AWS
Heroku
Docker
GCP
Kubernetes
With our behavioural science-based platform, you continuously empower your employees to protect your organisation.
Cologne • London • Paris • Madrid • Berlin • Data & Analytics • Artificial Intelligence • Cybersecurity
≈ $82k – $185k per year (Estimated) • Remote (United Kingdom, Ireland, Portugal) • Full-Time
TypeScript
JavaScript
AI/ML
Claude
Cursor
Frontend
React.js
DevOps
CI/CD
Datadog
GitHub
IAM
QA
Sentry
≈ $89k – $168k per year (Estimated) • Senior • 5+ years exp • Remote (United Kingdom, Ireland, Portugal) • Full-Time • Senior
TypeScript
JavaScript
Databases
Amazon Aurora
PostgreSQL
Frontend
React.js
DevOps
AWS
Datadog
Grafana
QA
Sentry
≈ $89k – $169k per year (Estimated) • Senior • Remote (United Kingdom) • Full-Time • Senior
Node JS
TypeScript
JavaScript
Node JS
Nest.JS
AI/ML
AI Agents
LangChain
LangGraph
Model Context Protocol
Frontend
React.js
Canonical is the publisher of Ubuntu, the world's most widely used Linux distribution, headquartered in London. Founded in 2004 by Mark Shuttleworth, the company provides enterprise-grade services, support, and security for open-source software, enabling organizations to deploy and manage workloads consistently across diverse environments. Their portfolio spans the entire compute spectrum - from public and private cloud infrastructure (OpenStack), container orchestration (Kubernetes/MicroK8s), and data center management to specialized edge and IoT computing.
HQ: London, United Kingdom • Artificial Intelligence • Software • Information Technology • 1001-5000 employees • Est. 2004
≈ $114k – $255k per year (Estimated) • Lead • Remote • Bachelor's Degree • Freelance • Staff
C++
Go
Python
Rust
DevOps
Ubuntu
≈ $114k – $256k per year (Estimated) • Lead • Remote • Bachelor's Degree • Principal
C++
Go
Python
Rust
TypeScript
SQL
DevOps
Ubuntu
Debian
Docker
gRPC
Kubernetes
OpenStack
≈ $66k – $172k per year (Estimated) • Junior • Remote • Bachelor's Degree • Internship • Junior
Bash
C++
Go
JavaScript
Python
Rust
DevOps
Kubernetes
Ubuntu
Debian
Fedora
Sony is a Japanese multinational conglomerate headquartered in Tokyo. It operates across gaming, music, movies, electronics, imaging sensors, and financial services, with PlayStation being one of its best-known brands. The company is organized into several major segments, including Game & Network Services, Music, Pictures, Entertainment Technology & Services, and Imaging & Sensing Solutions.
HQ: Tokyo, Japan • Gaming Consoles • Media & Entertainment • Consumer Electronics • 1001-5000 employees
≈ $213k – $354k per year (Estimated) • Staff+ • 5+ years exp • Remote (United Kingdom) • Staff
C++
AI/ML
LLM
RAG
LLM Guardrails
DevOps
CI/CD
Git
gRPC
≈ $143k – $271k per year (Estimated) • Senior • Liverpool • Remote (United Kingdom) • Bachelor's Degree • Senior
≈ $143k – $271k per year (Estimated) • Senior • London • Remote (United Kingdom) • Bachelor's Degree • Senior
Salary range
| Seniority |
Jobs |
25% |
Median |
75% |
| Middle |
11 |
$88K |
$149K |
$180K |
| Senior |
69 |
$140K |
$200K |
$300K |
| Staff |
21 |
$169K |
$185K |
$230K |
| All levels |
128 |
$124K |
$185K |
$250K |
Based only on the listings that state pay. Gross annual amounts, converted to USD so roles in different currencies stay comparable.
The market right now
Alion currently lists 440 open Backend Developer jobs in Belfast from 208 companies. 52 of them were posted or refreshed in the last seven days. 171 of the employers have posted something in the last three months, which is the pool worth watching if you are starting a search now. Every listing links straight to the employer, so you apply on their own board rather than through an intermediary.
What these roles pay
128 of these Backend Developer jobs in Belfast state pay directly. Across them the middle half of the market sits between $124K and $250K a year, with a median of $185K. By level, the median runs middle at $149K, senior at $200K, and staff at $185K. The step from middle to staff is worth about 1.2x on median pay. Figures are gross annual amounts converted to US dollars, so roles in different currencies stay comparable.
Where the work is
The largest concentrations of these roles are United Kingdom (12), Poland (5), Netherlands (5), Ireland (4), and Spain (3). 94% of the listings are fully remote, so a large part of this market is open to you regardless of where you live.
Who is hiring
The employers with the most open Backend Developer jobs in Belfast right now are Canonical (32), GitLab (14), Affirm (13), Speechify (13), Grafana Labs (9), and TRM Labs (8). Each company page on Alion carries its size, funding stage, tech stack and every other position it has open, so you can judge the employer before you spend an evening on the application.
What employers ask for
Reading across the current listings, the tools that come up most often are Python (191), AWS (180), JavaScript (157), Kubernetes (150), TypeScript (135), CI/CD (128), PostgreSQL (116), and AI Agents (107). The counts are how many of these openings name each one, which is a better guide to what is actually being hired for than a generic skills list.
Relocation, visas and equity
Of the current Backend Developer jobs in Belfast, 46 state visa sponsorship, 17 offer a relocation package, and 96 include equity. These are filters on the list above, so you can narrow it to the ones that make a move possible for you.
