Backend Developer Jobs in Belfast

Backend Developer jobs in Belfast hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $82,917/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.

Belfast
AI/ML
Data Science
Backend
Frontend
Mobile
DevOps
Web3
Games
Hardware
Robotics
Security
QA
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Networking
Product
Design
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Enterprise Apps
Quantum

Unmind

unmind.com
Unmind provides a B2B mental health platform that delivers clinically-backed tools and training for organisations. Unmind is based out of London, United Kingdom.
unmind.com • London • Health Care • Mental Health
London • Health Care • Mental Health
2 months ago

Technical Lead

$95k – $190k per year (Estimated) • Lead • London • Remote (United Kingdom) • Visa sponsorship • Bachelor's Degree • Staff
Go
Node JS
Python
SQL
TypeScript
JavaScript
AI/ML
Claude
Claude Code
Frontend
GraphQL
React.js
Apply
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Circuithub

circuithub.com
CircuitHub Inc. is a Web-based contract manufacturer and design hosting service. The company specializes in rapid, turn-key assembly for prototyping and short-run production of electronic goods.
circuithub.com • Cambridge • Deerfield • PCB & Assembly • Manufacturing • Electronics Manufacturing • 51-200 employees
Cambridge • Deerfield • PCB & Assembly • Manufacturing • Electronics Manufacturing • 51-200 employees
Verified live · 1 day ago 2 months ago

Haskell Engineer

$95k – $176k per year • Remote (United States, United Kingdom) • Full-Time
Haskell
Databases
PostgreSQL
AI/ML
Computer Vision
OpenCV
PyTorch
DevOps
AWS
Robotics
Path Planning
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Enode

enode.com
Enode's APIs enable you to instantly connect users' energy devices - including EVs, solar inverters, home batteries and thermostats - to your app. You can surface data, and then take action with it. Our out-of-the-box algorithms allow you to contr...
enode.com • Oslo • Hardware • Internet of Things • Energy & Utilities
Oslo • Hardware • Internet of Things • Energy & Utilities
Verified live · 1 day ago 2 months ago

Senior Software Engineer (Home Energy)

$68k – $192k per year (Estimated) • Senior • Remote (Europe) • Full-Time • Senior
TypeScript
Databases
PostgreSQL
TimescaleDB
DevOps
AWS
Apply
Verified live · 1 day ago 2 months ago

Software Engineer (Connect Platform)

Remote (Europe) • Full-Time
JavaScript
TypeScript
Databases
PostgreSQL
Frontend
React.js
DevOps
CI/CD
Platform Engineering
AWS
CloudFormation
Docker
Apply
Verified live · 1 day ago 2 months ago

Senior Software Engineer (Connect Platform)

$69k – $195k per year (Estimated) • Senior • Remote (Europe) • Full-Time • Senior
TypeScript
Databases
PostgreSQL
DevOps
CI/CD
Platform Engineering
AWS
CloudFormation
Docker
Apply
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Allica Bank

allica.bank
Allica Bank is a UK challenger bank and digital fintech platform headquartered in London and Milton Keynes, specifically tailored to serve established small and medium-sized enterprises (SMEs with 5–250 employees). Founded in 2019, the bank offers commercial mortgages, asset finance, business growth loans, rewards current accounts, and high-yield savings products. By combining modern digital banking infrastructure with dedicated local relationship managers, Allica addresses the underserved mid-market business sector across the United Kingdom.
allica.bank • HQ: London, Milton Keynes, United Kingdom • FinTech • Financial Services • Banking • Est. 2019
HQ: London, Milton Keynes, United Kingdom • FinTech • Financial Services • Banking • Est. 2019
2 months ago

Sr. Fullstack Engineer

$89k – $216k per year (Estimated) • Senior • Remote (United Kingdom, India, United States) • Senior
JavaScript
Kotlin
TypeScript
Java
Java
Spring Boot
AI/ML
Copilot
Frontend
React.js
DevOps
AWS
Azure
Azure DevOps
CI/CD
GCP
Rest API
GitHub
Apply
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BlueOptima

blueoptima.com
BlueOptima provides a "coding effort analytics" platform for developers and managers. It helps create better quality code. Developers can have visibility over their efforts and can receive feedback on it.
blueoptima.com • Bengaluru • London • Belfast • Cambridge • Information Technology • Data & Analytics • Code Intelligence • 51-200 employees • Est. 2006
Bengaluru • London • Belfast • Cambridge • Information Technology • Data & Analytics • Code Intelligence • 51-200 employees • Est. 2006
2 months ago

Full Stack Developer

$88k – $216k per year (Estimated) • Senior • 5+ years exp • Remote (India, United Kingdom) • Visa sponsorship • Bachelor's Degree • Staff
JavaScript
SQL
TypeScript
Java
Java
Spring Boot
Frontend
Angular
React.js
D3.js
DevOps
CI/CD
Jenkins
Apply
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Reactive Markets

reactivemarkets.com
Reactive Markets is a financial infrastructure company that provides ultra-low-latency connectivity and execution for institutional trading across FX, equities and other asset classes. Its network connects clients to 35+ liquidity providers with deterministic sub-50 microsecond end-to-end latency, accessible via a single API, UI, or integrations with EMS/OMS/pricing engines. The platform is engineered for bilateral trading, systematic and manual strategies, and offers real-time latency reporting, analytics, global deployment (New York, London, Singapore), and FCA-regulated services for professional market participants.
reactivemarkets.com • London • FinTech • Financial Services • Capital Markets • Est. 2019
London • FinTech • Financial Services • Capital Markets • Est. 2019
Verified live · 5 hours ago 2 months ago

Senior C++ Software Engineer

$84k – $159k per year (Estimated) • Senior • 5+ years exp • Remote (United Kingdom) • Visa sponsorship • Full-Time • Senior
C++
Python
C#
C#
.NET
AI/ML
Claude
DevOps
AWS
Git
SLI/SLO/SLA
Apply
Verified live · 5 hours ago 2 months ago

C++ Software Engineer

$61k – $145k per year (Estimated) • Middle • 3+ years exp • Remote (United Kingdom) • Visa sponsorship • Full-Time • Middle
C++
Python
C#
C#
.NET
AI/ML
Claude
DevOps
AWS
Git
SLI/SLO/SLA
Apply
Report

Qcp

qcp.com
qcp.com • Kuala Lumpur • New York • Abu Dhabi • Ho Chi Minh City • Belfast • Crypto Exchanges • Blockchain & Crypto
Kuala Lumpur • New York • Abu Dhabi • Ho Chi Minh City • Belfast • Crypto Exchanges • Blockchain & Crypto
Verified live · 9 hours ago 2 months ago

Senior Software Engineer

$92k – $167k per year (Estimated) • Senior • 5+ years expIn office (Belfast, United Kingdom) • Bachelor's Degree • Full-Time • Senior
AWS
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LiveRamp

liveramp.com
LiveRamp is a data collaboration platform headquartered in San Francisco, California, and founded in 2011. The company provides an AI-powered platform for identity resolution, data onboarding, and secure data sharing through its proprietary RampID technology and clean room solutions. It serves a global network of brands, agencies, and publishers across industries such as retail, healthcare, and financial services, operating as a publicly traded entity on the New York Stock Exchange.
liveramp.com • HQ: San Francisco, United States • Marketing Analytics • Identity Management • Cybersecurity • Advertising • Sales & Marketing • Data Integration • Data Governance • Data & Analytics • 501-1000 employees • Est. 2011
HQ: San Francisco, United States • Marketing Analytics • Identity Management • Cybersecurity • Advertising • Sales & Marketing • Data Integration • Data Governance • Data & Analytics • 501-1000 employees • Est. 2011
2 months ago

Backend Engineer

$88k – $215k per year (Estimated) • Senior • 5+ years exp • Remote (United States, United Kingdom, Australia, Pakistan) • Visa sponsorship • Bachelor's Degree • Senior
Java
Databases
Apache Kafka
AI/ML
Spark
DevOps
AWS
Azure
GCP
Rest API
Apply
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PQShield

pqshield.com
PQShield is a cybersecurity enterprise specializing in quantum-safe cryptography, headquartered in Oxford, United Kingdom. Spun out of the University of Oxford in 2018 by Dr. Ali El Kaafarani, the venture has raised over $60 million from top-tier investors including Addition, Oxford Science Enterprises, and Chevron Technology Ventures.
pqshield.com • HQ: Oxford, United Kingdom • Science & Engineering • Quantum Science & Computing • Cybersecurity • Est. 2018
HQ: Oxford, United Kingdom • Science & Engineering • Quantum Science & Computing • Cybersecurity • Est. 2018
Open 103 daysVerified live · 1 day ago 4 months ago

Senior Software Engineer

$55k – $106k per year (Estimated) • Senior • 2+ years exp • Remote (France, United Kingdom, Belgium, Netherlands, Spain) • Master's Degree • Senior
Rust
Cybersecurity
Threat Modeling
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Autodesk

autodesk.com
Autodesk is a global software leader specializing in 3D design, engineering, construction, and entertainment technology solutions. The company provides industry-standard software platforms, including AutoCAD, Revit, Fusion 360, and Maya, enabling professionals to design, visualize, and simulate complex physical structures and digital media.
autodesk.com • HQ: San Francisco, United States • Design & Creative • Software • 3D Design • CAD & PLM • 1001-5000 employees
HQ: San Francisco, United States • Design & Creative • Software • 3D Design • CAD & PLM • 1001-5000 employees
$131k – $191k per year • Equity • Lead • 10+ years expLondon • Remote (United Kingdom) • Visa sponsorship • Bachelor's Degree • Contractor • Principal
Java
TypeScript
Node JS
JavaScript
Node JS
Nest.JS
Databases
DynamoDB
AI/ML
Claude
Claude Code
Copilot
AI Agents
Frontend
Next.js
React.js
DevOps
AWS
AWS Lambda
CI/CD
Docker
GitHub Actions
GitOps
Jenkins
Amazon ECS
API Gateway
GitHub
Apply
Report

Travelers

travelers.com
The Travelers Companies, Inc. is an American insurance provider headquartered in New York City and founded in 1853. The company offers a comprehensive suite of property and casualty insurance products, including coverage for automobiles, homes, and diverse commercial risks such as workers compensation and general liability. It operates as a major component of the Dow Jones Industrial Average and serves customers through thousands of independent agents and brokers across the United States, Canada, the United Kingdom, and Ireland.
travelers.com • HQ: New York, United States • Risk Management • Financial Services • Insurance • 1001-5000 employees
HQ: New York, United States • Risk Management • Financial Services • Insurance • 1001-5000 employees
$109k – $245k per year (Estimated) • Lead • 5+ years exp • Remote (United Kingdom, United States, Ireland) • Visa sponsorship • Bachelor's Degree • Staff
C#
Python
SQL
TypeScript
JavaScript
Databases
Amazon DocumentDB
MongoDB
AI/ML
AI Agents
Claude
LangGraph
LLM
LangChain
Anthropic
AWS Bedrock AgentCore
Function Calling
OpenAI
OpenAI Agents SDK
Frontend
Angular
DevOps
AWS
CI/CD
GitHub
Apply
Report

Investengine

investengine.com
InvestEngine brings unbeatable value and innovation to your investing. No buying and selling fees for 870+ exchange-traded funds from iShares, Vanguard and other leading brands. With powerful tools for automating, diversifying and analysing your portfolio. All you need to grow your wealth. Our portfolios are available in an ISA, General Account, or Business Account for companies — all with easy access and for a minimum investment of only £100.
investengine.com • London • Financial Services • FinTech • Asset Management
London • Financial Services • FinTech • Asset Management
$93k – $187k per year (Estimated) • Lead • 5+ years expLondon • Remote (United Kingdom) • Staff • Russian: C1
Python
Python
Django
Databases
Apache Kafka
MySQL
RabbitMQ
Redis
DevOps
AWS
Docker
TeamCity
GitHub
Apply
Report

KI

ki.com
KI offers smart contract furniture for education, workplace & healthcare – a full range of seating, tables & storage with personalized design support.
ki.com • London • Consumer Goods • Manufacturing • Furniture
London • Consumer Goods • Manufacturing • Furniture
2 months ago

Full Stack Engineer

$78k – $176k per year (Estimated)London • Remote (United Kingdom) • Visa sponsorship • Bachelor's Degree
TypeScript
DevOps
CI/CD
Git
GitHub
Management
Jira
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Mural

mural.co
Mural is a SaaS company that builds a collaborative digital workspace for teams who need to think together, plan work, and make decisions when they are not in the same room. Its product centres on a visual canvas where people can map ideas, run workshops, and turn discussions into structured outcomes. The problem it tackles is a familiar one for modern organisations, keeping collaboration clear and inclusive across distributed teams, while avoiding the confusion that can come from long video calls, scattered documents, and decisions that only exist in someone’s notes.
mural.co • Professional Services • Communication & Collaboration • Artificial Intelligence • 51-200 employees
Professional Services • Communication & Collaboration • Artificial Intelligence • 51-200 employees
Verified live · 16 min ago 2 months ago

Staff Backend Engineer, AI Systems

$171k – $285k per year (Estimated) • Staff+ • 7+ years exp • Remote (United States, United Kingdom) • Full-Time • Staff
JavaScript
AI/ML
AI Agents
Embeddings
LLM
Function Calling
Knowledge Graph
OpenAI
Frontend
React.js
DevOps
Azure
Apply
Open 130 daysVerified live · 16 min ago 5 months ago

Senior Software Engineer, Canvas Core

$52k – $119k per year (Estimated) • Senior • 6+ years exp • Remote (Argentina, United Kingdom, Canada) • Full-Time • Senior
JavaScript
Node JS
TypeScript
AI/ML
AI Agents
Frontend
React.js
Apply
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RevenueCat

revenuecat.com
Founded in 2017, RevenueCat is a software infrastructure company that simplifies in-app subscriptions and purchase management for digital applications. Its developer-first platform provides unified SDKs, automated receipt validation, and cross-platform billing tools that allow engineering teams to handle complex app store transactions seamlessly. Beyond subscription logistics, the company offers dynamic paywall tools, data analytics, and A/B testing features to help businesses optimize pricing and maximize recurring revenue.
revenuecat.com • HQ: San Francisco, United States • Software • Commerce • Subscription Commerce • Billing & Invoicing • Mobile App Development • Est. 2017
HQ: San Francisco, United States • Software • Commerce • Subscription Commerce • Billing & Invoicing • Mobile App Development • Est. 2017
Top 25% payVerified live · 8 hours ago 2 months ago

Senior Software Engineer, Product

$230k per year • Equity • Senior • 5+ years exp • Remote (AMER, United Kingdom) • Full-Time • Senior
JavaScript
Python
SQL
TypeScript
Python
Django
Flask
Databases
PostgreSQL
AI/ML
OpenAI
Frontend
Angular
React.js
Vue.js
Mobile
MVC
RevenueCat
State Management
DevOps
AWS
Apply
Top 25% payVerified live · 8 hours ago 2 months ago

Senior Software Engineer, Agents

$230k per year • Equity • Senior • 5+ years exp • Remote (AMER, United Kingdom) • Full-Time • Senior
LangChain
Langfuse
AI Agents
Anthropic
Function Calling
OpenAI
Structured Outputs
Mobile
RevenueCat
Management
Slack
Apply
Top 25% payVerified live · 8 hours ago 2 months ago

Senior Backend Engineer

$230k per year • Equity • Senior • 5+ years exp • Remote (AMER, United Kingdom) • Full-Time • Senior
Python
SQL
Databases
PostgreSQL
AI/ML
OpenAI
Mobile
RevenueCat
Apply
Report

Databento

databento.com
Databento streamlines access to market data, offering a user-friendly self-service platform. Customers can quickly obtain live exchange feeds and vast amounts of historical data, with flexible pricing based solely on usage.
databento.com • San Francisco • New York • London • Beijing • Salt Lake City • Financial Services • Data & Analytics • Capital Markets
San Francisco • New York • London • Beijing • Salt Lake City • Financial Services • Data & Analytics • Capital Markets
$88k – $216k per year (Estimated) • Senior • 5+ years exp • Remote (United States, China, United Kingdom) • Visa sponsorship • Bachelor's Degree • Full-Time • Senior
C#
C++
Java
DevOps
CI/CD
Apply
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Data Intellect

dataintellect.com
Every question matters, every pathway, direction, thought process and conversation. Because every challenge makes us stronger, more knowledgeable, more determined and more valuable to our clients.
dataintellect.com • Belfast • London • Toronto • Dublin • New York • Investment Banking • Capital Markets • Financial Services
Belfast • London • Toronto • Dublin • New York • Investment Banking • Capital Markets • Financial Services
Verified live · 1 day ago 2 months ago

Python Engineer. New Product Team.

$64k – $148k per year (Estimated) • Middle • 3+ years expIn office (Belfast, United Kingdom) • Full-Time • Senior
Python
AI/ML
Airflow
Pandas
Time Series Forecasting
DevOps
Kubernetes
Apply
Open 188 daysVerified live · 1 day ago 7 months ago

Python Contractor

$62k – $145k per year (Estimated) • Middle • 3+ years expIn office (Belfast, United Kingdom) • Contractor • Senior
Python
SQL
Python
FastAPI
Flask
Databases
PostgreSQL
QA
Pytest
Apply
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Wayflyer

wayflyer.com
Providing eCommerce businesses with fairer, faster, and more flexible funding. Our mission at Wayflyer is to support the ambition of the eCommerce businesses we work with. We do this by solving the toughest problems in eCommerce, giving founders ...
wayflyer.com • New York • Dublin • Charlotte • London • Berlin • Commerce • Est. 2019
New York • Dublin • Charlotte • London • Berlin • Commerce • Est. 2019
Verified live · 7 hours ago 2 months ago

Full Stack Software Engineer

$66k – $187k per year (Estimated) • Senior • 5+ years exp • Remote (Europe) • Bachelor's Degree • Full-Time • Senior
Python
SQL
TypeScript
JavaScript
Python
Django
FastAPI
Flask
Databases
PostgreSQL
Frontend
React.js
Storybook
DevOps
AWS
CI/CD
Git
GitHub Actions
GitHub
QA
Playwright
Pytest
Vitest
Apply
Open 187 daysVerified live · 7 hours ago 7 months ago

Backend Software Engineer

$66k – $188k per year (Estimated) • Senior • 5+ years exp • Remote (Europe) • Bachelor's Degree • Full-Time • Senior
Python
SQL
Python
Django
FastAPI
Flask
Databases
PostgreSQL
DevOps
AWS
Git
QA
Pytest
Apply
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Monzo

monzo.com
Monzo is a major UK-based digital bank that operates primarily through a mobile application to deliver modern personal and business financial services. Founded in 2015, the platform provides current accounts, savings, loans, and international transfers equipped with real-time transaction alerts and automated budgeting features. By offering a branchless, user-friendly experience, it enables millions of customers to manage their everyday finances with transparency and convenience.
monzo.com • HQ: London, United Kingdom • FinTech • Financial Services • Banking • 51-200 employees • Est. 2015
HQ: London, United Kingdom • FinTech • Financial Services • Banking • 51-200 employees • Est. 2015
Open 810 daysTop 25% pay 2 years ago

Senior Staff Backend Engineer

$210k – $271k per year • Staff+ • Cardiff • Remote (United Kingdom) • Relocation • Visa sponsorship • Part-Time • Staff
Go
Databases
Apache Kafka
DevOps
AWS
Docker
GCP
Kubernetes
Apply
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UpGuard

upguard.com
The AI risk operations center for your. Cut cyber risk with the only platform that spans your supply chain, attack surface, workforce, and trust relationships.
upguard.com • Sydney • Los Angeles • Mumbai • Melbourne • Austin • Supply Chain • Artificial Intelligence • Cybersecurity
Sydney • Los Angeles • Mumbai • Melbourne • Austin • Supply Chain • Artificial Intelligence • Cybersecurity
$51k – $173k per year (Estimated) • Middle • 4+ years expSydney • Remote (United States, India, United Kingdom, Australia) • Internship • Middle
Go
JavaScript
Databases
PostgreSQL
AI/ML
AI Agents
Frontend
React.js
DevOps
GCP
Kubernetes
Apply
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Backend Developer Jobs in Belfast
Frequently asked questions
How many Backend Developer jobs in Belfast are available on Alion?
There are currently 36 active listings from 14 hiring companies on Alion, refreshed daily.
What salary do Backend Developer jobs in Belfast pay?
The average salary is around $82,917 per year based on the current listings.
Are remote options available for Backend Developer jobs in Belfast?
Yes, many of these roles offer remote or hybrid work, and you can filter listings by remote, relocation and visa sponsorship.
How do I apply for Backend Developer jobs in Belfast?
Open any listing on Alion and apply directly with the employer through the provided link - no lengthy sign-up required.