Backend Developer Jobs in London

Backend Developer jobs in London hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $213,225/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.

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Quantum

TripAdvisor

tripadvisor.com
Tripadvisor builds a platform that connects travelers with experiences worth sharing, offering trusted insights and resources for meaningful travel and dining adventures. It's designed for anyone looking to explore, plan, and book their travel efficiently, featuring tools and services from its well-known brands like Viator and TheFork. What sets Tripadvisor apart is its commitment to curating authentic experiences and fostering community-driven content across a vast network of travel and restaurant options.
tripadvisor.com • HQ: Needham, United States • Travel & Tourism • Travel Agencies • Travel Technology
HQ: Needham, United States • Travel & Tourism • Travel Agencies • Travel Technology
$133k – $288k per year (Estimated) • Staff+ • 10+ years expIn office (London, United Kingdom) • Full-Time • Staff
Kotlin
Swift
Frontend
GraphQL
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Galaxy Digital

galaxy.com
Galaxy Digital is a financial services and investment management firm specializing in digital assets, cryptocurrency, and blockchain technology. Founded by Michael Novogratz, the company serves as a bridge between traditional finance and the crypto ecosystem through institutional trading, asset management, investment banking, and mining operations. Additionally, it has expanded into digital infrastructure, providing data center capabilities to support high-performance computing, artificial intelligence, and decentralized networks.
galaxy.com • HQ: New York, United States • Hardware • Financial Services • AI Infrastructure • Blockchain & Crypto • 501-1000 employees
HQ: New York, United States • Hardware • Financial Services • AI Infrastructure • Blockchain & Crypto • 501-1000 employees
Open 524 daysVerified live · 1 hour ago 1 year ago

Vice President, Software Engineer - Finance Engineering

$73k – $203k per year (Estimated) • Executive • In office (London, United Kingdom) • Architect
Go
Python
SQL
Python
pySpark
Databases
Databricks
Delta Lake
AI/ML
Tokenization
Spark
Pandas
DevOps
HPC
AWS
Docker
Kubernetes
Web3
DeFi
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Verified live · 1 hour ago 7 months ago

VP, Java Electronic Trading Engineer

$72k – $199k per year (Estimated) • Executive • 10+ years expIn office (London, United Kingdom) • Architect
Java
AI/ML
Tokenization
DevOps
HPC
AWS
Docker
Kubernetes
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Sportradar

sportradar.com
Sportradar is a multinational sports technology company that collects, analyzes, and distributes sports data to bookmakers, media companies, and sports leagues worldwide. Founded in 2001 and headquartered in Sankt Gallen, Switzerland, the company provides live sports data feeds, odds modeling, audiovisual content, and integrity monitoring services to combat match-fixing. By partnering with major global leagues like the NBA, NHL, and MLB, it powers real-time betting operations, broadcast visualizations, and digital fan experiences.
sportradar.com • HQ: Sankt Gallen, Switzerland • Sports Analytics • Fan Engagement • Sports • 1001-5000 employees • Est. 2001
HQ: Sankt Gallen, Switzerland • Sports Analytics • Fan Engagement • Sports • 1001-5000 employees • Est. 2001
Verified live · 14 min ago 2 months ago

Software Engineer

$81k – $182k per year (Estimated)In office (London, United Kingdom) • Full-Time • Middle
C#
C#
.NET
AI/ML
Copilot
Cursor
DevOps
AWS
GitLab CI
GitLab
Azure
CI/CD
Docker
GCP
Kubernetes
GitHub
Apply
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Palantir Technologies

palantir.com
Palantir Technologies is an American software company founded in 2003 that builds platforms for integrating, analysing and acting on large and fragmented datasets. Its Gotham platform serves defence, intelligence and law enforcement customers, Foundry brings the same data-operating model to commercial industries such as manufacturing, healthcare and energy, and the Artificial Intelligence Platform layers large language models over both. Headquartered in Denver, Colorado and listed on the New York Stock Exchange since 2020, the company is known for deploying forward engineers directly inside customer organisations.
palantir.com • HQ: Denver, United States • Information Technology • Software • Defense AI • Artificial Intelligence • National Security • Analytics Platforms • Data & Analytics • 1001-5000 employees • Est. 2003
HQ: Denver, United States • Information Technology • Software • Defense AI • Artificial Intelligence • National Security • Analytics Platforms • Data & Analytics • 1001-5000 employees • Est. 2003
$82k – $185k per year (Estimated)In office (London, United Kingdom) • Full-Time • English: C1
C++
JavaScript
Python
TypeScript
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$95k – $171k per year (Estimated) • Senior • 8+ years expIn office (London, United Kingdom) • Full-Time • Staff
C++
JavaScript
Python
TypeScript
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Open 131 day 5 months ago

Forward Deployed Reliability Engineer

$81k – $182k per year (Estimated)Remote/Hybrid (London, United Kingdom) • Full-Time
Java
Python
SQL
AI/ML
Spark
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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
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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
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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
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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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CURSOR Software AG

cursor.de
CURSOR Software AG is a German software company headquartered in Gießen, Germany, specializing in enterprise Customer Relationship Management (CRM) and Business Process Management (BPM) solutions. Founded over 30 years ago, the firm provides tailored, GDPR-compliant CRM platforms - including CURSOR-CRM, EVI, and TINA - specifically engineered for energy providers, financial institutions, and mid-to-large-scale industrial enterprises. Its modular software suite centralizes sales, marketing, and customer service operations while automating complex business workflows and energy sector compliance processes.
cursor.de • HQ: Giessen, Germany • Business Process Automation (BPA) • Software • 501-1000 employees
HQ: Giessen, Germany • Business Process Automation (BPA) • Software • 501-1000 employees
Verified live · 1 hour ago 2 months ago

RVP, Forward Deployed Engineering - EMEA

$89k – $169k per year (Estimated) • Senior • 8+ years expLondon • Remote (EMEA) • Full-Time • Staff
JavaScript
Python
TypeScript
AI/ML
Cursor
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Verified live · 1 hour ago 3 months ago

Forward Deployed Engineer - EMEA

$82k – $184k per year (Estimated)London • Remote (EMEA) • Full-Time
JavaScript
Python
TypeScript
AI/ML
Cursor
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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
Apply
Open 260 daysVerified live · 1 day ago 9 months ago

Full Stack Engineer

$78k – $177k per year (Estimated)In office (London, United Kingdom) • Full-Time
TypeScript
DevOps
CI/CD
Git
GitHub
Management
Jira
Apply
Open 330 daysVerified live · 1 day ago 11 months ago

Senior Full Stack Engineer

$90k – $164k per year (Estimated) • Senior • In office (London, United Kingdom) • Full-Time • Senior
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 · 22 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 · 22 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
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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
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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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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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Medtronic

medtronic.com
Medtronic is a global healthcare technology enterprise that develops and manufactures advanced medical devices and intelligent clinical platforms. Operating across more than 150 countries, the company delivers solutions across key therapeutic areas, including cardiovascular health, neuroscience, medical-surgical equipment, and patient monitoring systems.
medtronic.com • HQ: Minneapolis, United States • Diagnostics • Health Care • Medical Devices • 5000+ employees • Est. 1949
HQ: Minneapolis, United States • Diagnostics • Health Care • Medical Devices • 5000+ employees • Est. 1949
Verified live · 1 hour ago 2 months ago

Senior Software Engineer

$88k – $160k per year (Estimated) • Senior • 6+ years expIn office (London, United Kingdom) • Full-Time • Senior
Python
AI/ML
Computer Vision
AI Agents
DevOps
AWS
Apply
Verified live · 1 hour ago 2 months ago

Senior Software Engineer

$104k – $156k per year • Senior • 2+ years expIn office (London, United Kingdom) • Bachelor's Degree • Full-Time • Senior
C++
C++
Google Test
Qt
AI/ML
Computer Vision
DevOps
gRPC
AWS
Robotics
Zenoh
Apply
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Salesforce

salesforce.com
Salesforce is a global leader in cloud-based customer relationship management (CRM) software, helping businesses connect with their customers in a whole new way. Its comprehensive Customer 360 platform provides integrated applications for sales, customer service, marketing automation, e-commerce, and analytics.
salesforce.com • HQ: San Francisco, United States • Software • Information Technology • Sales & Marketing • Media & Entertainment • AI Agents • Commerce • Books • Professional Services • Artificial Intelligence • Marketplaces • Marketing Automation • Cloud Computing • Customer Relationship Management (CRM) • 1001-5000 employees
HQ: San Francisco, United States • Software • Information Technology • Sales & Marketing • Media & Entertainment • AI Agents • Commerce • Books • Professional Services • Artificial Intelligence • Marketplaces • Marketing Automation • Cloud Computing • Customer Relationship Management (CRM) • 1001-5000 employees
$71k – $166k per year (Estimated) • Middle • 3+ years expIn office (London, United Kingdom) • PhD • Full-Time • Middle
Apex
JavaScript
Python
TypeScript
Databases
Databricks
Snowflake
Google BigQuery
AI/ML
AI Agents
Claude
Cursor
LLM
Agentforce
LangChain
LlamaIndex
Prompt Engineering
Marketing
Salesforce
Apply
$71k – $166k per year (Estimated) • Middle • 3+ years expIn office (London, United Kingdom) • PhD • Full-Time • Middle
Apex
JavaScript
Python
TypeScript
Databases
Databricks
Snowflake
Google BigQuery
AI/ML
AI Agents
Claude
Cursor
LLM
Agentforce
LangChain
LlamaIndex
Prompt Engineering
Marketing
Salesforce
Apply
Report

Brave

brave.com
Brave Software is an internet browser that is focused in on being privacy-oriented and is combined with its blockchain-based digital advertising platform. The company is based out of San Francisco, California.
brave.com • London • Search Engines • Artificial Intelligence • 501-1000 employees
London • Search Engines • Artificial Intelligence • 501-1000 employees
Top 25% payVerified live · 1 hour ago 2 months ago

Sr. Solutions Engineer - API and Developer Platform

$150k – $200k per year • Senior • Remote (Europe, United States) • Full-Time • Senior
JavaScript
Python
Databases
Supabase
AI/ML
LangChain
LlamaIndex
LLM
RAG
Semantic Search
AI Agents
Semantic Search
DevOps
Vercel
GitHub
QA
Postman
Apply
Open 193 daysVerified live · 1 hour ago 7 months ago

Sr. C++ Web Engineer

$92k – $223k per year (Estimated) • Senior • Remote (United Kingdom) • Cofounder • Senior
C++
JavaScript
TypeScript
Frontend
Lit
React.js
Svelte
Vue.js
Web Components
Mobile
State Management
Apply
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Backend Developer Jobs in London
Frequently asked questions
How many Backend Developer jobs in London are available on Alion?
There are currently 682 active listings from 259 hiring companies on Alion, refreshed daily.
What salary do Backend Developer jobs in London pay?
The average salary is around $213,225 per year based on the current listings.
Are remote options available for Backend Developer jobs in London?
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 London?
Open any listing on Alion and apply directly with the employer through the provided link - no lengthy sign-up required.