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 $213,465/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.

London
AI/ML
Software
Data
Security
DevOps & Cloud
Leadership
Product
Design
Fintech
Hardware & Chips
Defense
Aerospace
Biotech
Energy
Robotics
Automotive
MedTech
Science

Viasat

viasat.com
viasat.com · HQ: Carlsbad, United States · C4ISR · Space & Aerospace · Telecommunications · Mobile Networks · Satellite Communications · 201-500 employees · Trust B · Hiring 236, 22 new
HQ: Carlsbad, United States · C4ISR · Space & Aerospace · Telecommunications · Mobile Networks · Satellite Communications · 201-500 employees · Trust B · Hiring 236, 22 new
Headquartered in Carlsbad, California, Viasat is a global communications company specializing in high-speed satellite broadband, secure networking, and defense communications services. The company designs, builds, and operates an advanced network of high-capacity satellites to deliver reliable connectivity to residential, commercial, aviation, and government users worldwide. Following its acquisition of Inmarsat, its expanded portfolio now spans global mobile satellite services, maritime communications, and critical national security infrastructure.
Ken Peterman · Executive Officer · decision-maker
Melinda Kimbro · Executive Officer · decision-maker
Robert Blair · Executive Officer · decision-maker
David Ryan · Executive Officer · decision-maker
No careers mailbox known
Verified live · 2 hours ago Visa sponsor 1 month ago Long shot · 24%

Senior Network and Software Systems Engineer

≈ $100k – $193k per year (Estimated) · Senior · In office (London, United Kingdom) · Senior
Python
DevOps
Linux
Apply
Open 95 daysVerified live · 2 hours ago Visa sponsor 3 months ago Long shot · 12%

Senior Full-Stack Developer

≈ $103k – $199k per year (Estimated) · Senior · In office (London, United Kingdom) · Senior
TypeScript
Python
JavaScript
Databases
Google BigQuery
AI/ML
Anthropic
Agentic Workflows
Model Context Protocol
OpenAI
Claude
LLM
AI Agents
Frontend
Next.js
React.js
DevOps
Google Cloud Run
AWS Lambda
API Gateway
Amazon S3
Terraform
GCP
CI/CD
AWS
Management
Agile
+14
Apply
Open 99 daysVerified live · 2 hours ago 3 months ago Long shot · 12%

Senior Software Engineer

≈ $97k – $189k per year (Estimated) · Senior · In office (London, United Kingdom) · Bachelor's Degree · Senior
SAS
Node JS
JavaScript
Databases
Apache Kafka
DevOps
Windows
Linux
Cybersecurity
Wireshark
Apply

Legora

legora.com
legora.com · HQ: Stockholm, Sweden · Legal Software · Document AI · Legal AI · 1001-5000 employees · Est. 2023 · Trust A · Hiring 303, 12 new
HQ: Stockholm, Sweden · Legal Software · Document AI · Legal AI · 1001-5000 employees · Est. 2023 · Trust A · Hiring 303, 12 new
Legora is a Swedish company founded in 2023 that builds artificial intelligence tools for lawyers, and it has grown unusually fast for a European enterprise software company in a market dominated by American incumbents. Its products handle document review, drafting, research and diligence inside the environments lawyers already work in, and it is designed for collaborative use so that a partner can see and correct what the system produced rather than receiving an opaque answer. Headquartered in Stockholm and valued in the billions within two years, it works with international law firms and in-house legal teams across Europe and the United States.
Sigge Labor · Executive Officer, Director · decision-maker
Max Junestrand · Executive Officer, Director · decision-maker
August Erséus · CPO · founder
Jacob Effron · Director
Careers mailbox is known
Verified live · 25 min ago 1 month ago Fading · 34%

Senior Software Engineer

≈ $123k – $239k per year (Estimated) · Senior · In office (London, United Kingdom) · Full-Time · Senior
Node JS
TypeScript
JavaScript
Frontend
React.js
DevOps
Kubernetes
Azure
AWS
Apply
Verified live · 25 min ago 5 months ago Long shot · 6%

Software Engineer

≈ $102k – $248k per year (Estimated) · In office (London, United Kingdom) · Full-Time
Node JS
JavaScript
Frontend
React.js
DevOps
Kubernetes
Azure
AWS
Apply

Anemoi Marine

anemoimarine.com
anemoimarine.com · HQ: London, United Kingdom · Wind Energy · Sea Freight · Startup · Hiring 3
HQ: London, United Kingdom · Wind Energy · Sea Freight · Startup · Hiring 3
Global leaders in wind assisted ship propulsion. Installing Flettner Rotor Sails can reduce EEDI scores and help achieve IMO 2030 and 2050 decarbonisation targets.
Rotor Sails · Directors · decision-maker
Careers mailbox is known
Verified live · 14 min ago 1 month ago Fading · 27%

Senior Software Engineer (Python)

≈ $87k – $168k per year (Estimated) · Senior · In office (London, United Kingdom) · Contractor · Senior
SQL
Python
Python
Pydantic
AI/ML
Polars
SciPy
NumPy
Time Series
DevOps
Git
CI/CD
Analytics
Plotly
+2
Apply

JustPark

justpark.com
justpark.com · HQ: Dallas, United States · Marketplaces · Smart Mobility · 51-200 employees · Est. 2019 · Startup · Hiring 5
HQ: Dallas, United States · Marketplaces · Smart Mobility · 51-200 employees · Est. 2019 · Startup · Hiring 5
Find parking, wherever and whenever you need it, online or via the JustPark app. Reserve a space at over 45,000 locations. Trusted by 10 million drivers.
George Baker Sr. · Executive Officer, Director · decision-maker
George Baker · Executive Officer, Director · decision-maker
Chuck Haling · Director
Kareem El Sawy · Director
No careers mailbox known
Verified live · 10 min ago Visa sponsor 1 month ago Likely open · 59%

Senior Fullstack Developer (Backend First)

≈ $87k – $169k per year (Estimated) · Senior · In office (London, United Kingdom) · Full-Time · Senior
PHP
Go
TypeScript
Apply

Shield AI

shield.ai
shield.ai · HQ: San Diego, United States · Defense Manufacturing · Drone AI · Defense AI · Military Drones · 1001-5000 employees · Est. 2015 · Trust B · Hiring 623, 12 new
HQ: San Diego, United States · Defense Manufacturing · Drone AI · Defense AI · Military Drones · 1001-5000 employees · Est. 2015 · Trust B · Hiring 623, 12 new
Shield AI is an American defence technology company founded in 2015 that builds autonomy software and uncrewed aircraft for military missions. Its Hivemind autonomy stack lets aircraft fly, navigate and complete objectives without GPS, a remote pilot or a communications link, which matters in contested environments where those links are jammed. Headquartered in San Diego, California, the company fields the V-BAT vertical take-off aircraft with United States and allied forces, licenses Hivemind to other manufacturers and is developing the X-BAT jet for high-end missions.
Andrew Reiter · Co-Founder · decision-maker
Ryan Tseng · Co-Founder · decision-maker
Brandon Tseng · Co-Founder & President · decision-maker
Gary Steele · Executive Officer, Director · decision-maker
Careers mailbox is known
Verified live · 2 hours ago Visa sponsor 1 month ago Fading · 36%

Senior Systems Engineer - Autonomy & Software

≈ $106k – $205k per year (Estimated) · Senior · 5+ years exp · Hybrid (London, United Kingdom) · Bachelor's Degree · Senior
C++
Python
Apply
Verified live · 2 hours ago Visa sponsor 2 months ago Fading · 26%

Staff Engineer, Digital Infrastructure (R5602)

≈ $170k – $302k per year (Estimated) · Staff+ · 7+ years exp · Hybrid (London, United Kingdom) · Bachelor's Degree · Staff
C++
Python
DevOps
Puppet
Chef
Configuration Management
Unix
Linux
Kubernetes
Apply
Verified live · 2 hours ago Visa sponsor 2 months ago Long shot · 24%

Senior Staff Engineer, Autonomy Software Integration & Test (R5539)

≈ $170k – $301k per year (Estimated) · Staff+ · 3+ years exp · Hybrid (London, United Kingdom) · Bachelor's Degree · Staff · English: C1 (Optional) · Ukrainian: C1 (Optional)
C++
Python
DevOps
Linux
Robotics
ArduPilot
MAVLink
QGroundControl
ROS
Apply

Aave

aave.com
aave.com · HQ: London, United Kingdom · Cryptocurrencies · DeFi · 11-50 employees · Est. 2017 · Startup · Trust B · Hiring 13, 1 new
HQ: London, United Kingdom · Cryptocurrencies · DeFi · 11-50 employees · Est. 2017 · Startup · Trust B · Hiring 13, 1 new
Aave is a decentralised lending protocol, developed by the London-based company Avara, that lets users supply crypto assets to earn yield and borrow against them without an intermediary. Started in 2017 as the peer-to-peer lender ETHLend and relaunched under its current name in 2018, the protocol pioneered variable and stable interest rate markets, flash loans and cross-chain liquidity pools. Governance sits with holders of the AAVE token, and the wider Avara portfolio now also includes the GHO stablecoin, the Lens social protocol and consumer wallet products.
Stani Kulechov · Founder & Chief Executive Officer · decision-maker
Jordan Lazaro Gustave · Chief Operating Officer · decision-maker
Careers mailbox is known
Verified live · 2 hours ago Visa sponsor 1 month ago Hiring now · 70%

Principal Backend Engineer, Push

≈ $109k – $219k per year (Estimated) · Lead · 8+ years exp · Hybrid (London, United Kingdom, Dublin, Ireland) · Full-Time · Principal
Rust
Go
C++
Java
Databases
PostgreSQL
Web3
Aave
Apply

commercetools

commercetools.com
commercetools.com · HQ: Munich, Germany · AI Agents · Commerce · Artificial Intelligence · B2B Commerce · Retail & Shop Systems · E-commerce Platforms · 51-200 employees · Est. 2006 · Hiring 26
HQ: Munich, Germany · AI Agents · Commerce · Artificial Intelligence · B2B Commerce · Retail & Shop Systems · E-commerce Platforms · 51-200 employees · Est. 2006 · Hiring 26
commercetools is a Munich company founded in 2006 that builds a composable commerce platform delivered entirely through interfaces. Its approach lets retailers assemble checkout, catalogue and pricing services rather than buying a monolithic suite. The company works with global brands and helped define the composable architecture movement in retail technology.
No named decision-maker yet.
Careers mailbox is known
Verified live · 3 hours ago Visa sponsor 1 month ago Hiring now · 73%

Senior Search Backend Engineer

≈ $94k – $182k per year (Estimated) · Senior · 5+ years exp · Hybrid (London, United Kingdom) · Senior · English: C1
Scala
Rust
Databases
ElasticSearch
DevOps
Rest API
Kubernetes
Helm
Apply

Bauer Media Outdoor

bauermediaoutdoor.co.uk
bauermediaoutdoor.co.uk · HQ: London, United Kingdom · Advertising · 501-1000 employees · Hiring 8, 1 new
HQ: London, United Kingdom · Advertising · 501-1000 employees · Hiring 8, 1 new
Bauer Media Outdoor is a UK out-of-home advertising company with digital advertising platforms and more than 33,000 advertising sites across the UK and Europe. It is part of the Bauer Media Group, and its vacancies include product owners, posting and cleaning operatives and warehouse staff. The company is headquartered in London, United Kingdom.
No named decision-maker yet.
Careers mailbox is known
Verified live · 2 hours ago Visa sponsor 1 month ago Fading · 38%

Mid-level Software Engineer

≈ $63k – $143k per year (Estimated) · Middle · In office (London, United Kingdom) · Full-Time · Middle
Node JS
TypeScript
JavaScript
SQL
Databases
PostgreSQL
DevOps
Grafana
Jenkins
Terraform
Kubernetes
CI/CD
AWS
+3
Apply

Prolific

prolific.com
prolific.com · HQ: London, United Kingdom · AI Research Labs · LLM & Generative AI · Artificial Intelligence · Market Research · AI Training Data & Annotation · 51-200 employees · Est. 2014 · Startup · Trust B · Hiring 27, 3 new
HQ: London, United Kingdom · AI Research Labs · LLM & Generative AI · Artificial Intelligence · Market Research · AI Training Data & Annotation · 51-200 employees · Est. 2014 · Startup · Trust B · Hiring 27, 3 new
Prolific is a British research technology company founded in 2014 by Oxford researchers that connects scientists, businesses and AI developers with a vetted pool of paid human participants. Its platform handles recruitment, demographic targeting, fair-pay enforcement, fraud screening and payment so studies return usable data instead of bot or duplicate responses. Originally built for academic behavioural research, the company now also supplies human feedback, preference data and evaluation for machine learning teams, and is headquartered in London with a large United States presence.
Phelim Bradley · Co-Founder & Chief Executive Officer · decision-maker
Katia Damer · Co-Founder · founder
Enrico D'Angelo · Director
Omri Benayoun · Director
No careers mailbox known
Verified live · 1 hour ago 1 month ago Likely open · 68%

Senior Product Engineer II

≈ $86k – $175k per year (Estimated) · Senior · London · Remote (United Kingdom) · Senior
TypeScript
JavaScript
Python
Python
Celery
Django REST Framework
Django
Databases
DynamoDB
Frontend
Vue.js
DevOps
CircleCI
Datadog
Amazon EventBridge
GitHub Actions
GCP
Kubernetes
AWS
+7
Apply
Verified live · 1 hour ago 2 months ago Fading · 38%

Senior Product Engineer

≈ $86k – $175k per year (Estimated) · Senior · London · Remote (United Kingdom) · Senior
TypeScript
JavaScript
Python
Python
Celery
Django REST Framework
Django
Databases
DynamoDB
Frontend
Vue.js
DevOps
CircleCI
Datadog
Amazon EventBridge
GitHub Actions
GCP
Kubernetes
Azure
AWS
Management
Agile
+9
Apply
ef.com · HQ: Lucerne, Switzerland · Travel Agencies · Higher Education · Language Learning · 1001-5000 employees · Est. 1965 · Trust B · Hiring 184, 24 new
HQ: Lucerne, Switzerland · Travel Agencies · Higher Education · Language Learning · 1001-5000 employees · Est. 1965 · Trust B · Hiring 184, 24 new
EF Education First is an international education company founded in 1965 that runs language schools, educational tours, academic exchange programs, au pair and gap year programs and corporate language training. It operates schools and offices in more than 100 countries, with large teams in Boston, Zurich, London and São Paulo, and hires sales consultants, coordinators and digital marketing staff. The company is headquartered in Lucerne, Switzerland.
No named decision-maker yet.
No careers mailbox known
Verified live · 1 hour ago 1 month ago Long shot · 10%

Agentic Software Engineer

≈ $74k – $180k per year (Estimated) · In office (London, United Kingdom)
AI Agents
Apply

Morgan Stanley

morganstanley.com
morganstanley.com · HQ: New York, United States · Online Brokerage & Trading Platforms · Asset Management & Funds · Wealth Management & Financial Advisors · Investment Banking & M&A Advisory · 5000+ employees · Est. 1935 · NYSE: MS · Trust B · Hiring 688, 22 new
HQ: New York, United States · Online Brokerage & Trading Platforms · Asset Management & Funds · Wealth Management & Financial Advisors · Investment Banking & M&A Advisory · 5000+ employees · Est. 1935 · NYSE: MS · Trust B · Hiring 688, 22 new
Headquartered in New York City, New York, Morgan Stanley is a multinational investment bank and financial services enterprise. The firm operates across three primary business divisions: Institutional Securities, Wealth Management, and Investment Management - offering services such as mergers and acquisitions advisory, equity and debt underwriting, sales and trading, market research, and asset management. Managing trillions of dollars in client assets across dozens of countries, it serves corporations, governments, financial institutions, and individuals as a primary liquidity provider and core market maker in global capital markets.
No named decision-maker yet.
No careers mailbox known
Verified live · 1 hour ago Visa sponsor 1 month ago Likely open · 50%

Developer (Python)

≈ $84k – $163k per year (Estimated) · Senior · 7+ years exp · In office (London, United Kingdom) · Senior
Java
Python
TypeScript
JavaScript
Databases
PostgreSQL
AI/ML
A2A
Copilot Studio
Model Context Protocol
Copilot
RAG
LLM
Machine Learning
Frontend
Angular
DevOps
Unix
Linux
Azure
CI/CD
Management
Scrum
Agile
+11
Apply
Verified live · 1 hour ago Visa sponsor 4 months ago Long shot · 22%

Lead Software Engineer - Equities - VP

≈ $79k – $199k per year (Estimated) · Head+ · Hybrid (London, United Kingdom) · Staff
TypeScript
Java
JavaScript
AI/ML
Time Series
Frontend
Angular
Mobile
JUnit
DevOps
Unix
Jenkins
Rest API
Git
Linux
+3
Apply

The Vanguard Group

vanguard.com
vanguard.com · HQ: Malvern, United States · Wealth Management & Financial Advisors · Online Brokerage & Trading Platforms · Asset Management & Funds · 1001-5000 employees · Est. 1975 · Trust B · Hiring 279, 45 new
HQ: Malvern, United States · Wealth Management & Financial Advisors · Online Brokerage & Trading Platforms · Asset Management & Funds · 1001-5000 employees · Est. 1975 · Trust B · Hiring 279, 45 new
The Vanguard Group is an American investment manager founded in 1975 that pioneered the retail index fund and is now one of the two largest asset managers in the world. It is owned by the funds it runs, and therefore by their shareholders, a mutual structure that lets it push management fees toward zero and has reshaped pricing across the whole industry. From Malvern in Pennsylvania it operates mutual funds, exchange traded funds, brokerage, retirement plan administration and advice services for tens of millions of individual and institutional clients.
Greg Davis · President and Chief Investment Officer · decision-maker
Salim Ramji · Chief Executive Officer · decision-maker
John Bogle · Founder · founder
No careers mailbox known
Verified live · 2 hours ago 1 month ago Long shot · 17%

Senior Full Stack Software Engineer

≈ $90k – $175k per year (Estimated) · Senior · Hybrid (London, United Kingdom) · Full-Time · Senior
Node JS
Java
Python
JavaScript
Databases
DynamoDB
MySQL
PostgreSQL
Frontend
Vue.js
React.js
DevOps
GCP
Azure
CI/CD
AWS
+5
Apply

Arrive

arrive.com
arrive.com · HQ: Stockholm, Sweden · Public Transport · Smart Mobility · 51-200 employees · Est. 1955 · Trust A · Hiring 64, 7 new
HQ: Stockholm, Sweden · Public Transport · Smart Mobility · 51-200 employees · Est. 1955 · Trust A · Hiring 64, 7 new
Arrive is an urban mobility technology company headquartered in Stockholm that provides digital parking payments, parking meters and operator software, EV charging payments, mobility data and public transport ticketing to cities, businesses and drivers. Its brands include EasyPark, Flowbird, RingGo, ParkMobile and Parkopedia, it operates in more than 90 countries and 20,000 cities, traces its roots to parking meters first installed in Sweden in 1955, and is backed by Verdane, Vitruvian Partners and Searchlight Capital. It hires software, backend, data and DevOps engineers, data scientists, payments product managers, designers, risk analysts and B2B account and customer experience managers.
No named decision-maker yet.
No careers mailbox known
Verified live · 2 hours ago 1 month ago Fading · 41%

Senior Python Engineer (Data)

≈ $90k – $174k per year (Estimated) · Senior · Hybrid (London, United Kingdom) · Full-Time · Senior
Python
Python
FastAPI
Databases
Apache Kafka
Redis
PostgreSQL
AI/ML
Pandas
NumPy
Machine Learning
Spark
DevOps
AWS CDK
Pulumi
Amazon ECS
Terraform
Docker
Kubernetes
AWS
+8
Apply
Verified live · 2 hours ago 1 month ago Fading · 41%

Senior Backend Engineer - Revenue

≈ $84k – $162k per year (Estimated) · Senior · 5+ years exp · Hybrid (London, United Kingdom) · Full-Time · Senior
PHP
SQL
PHP
Laravel
AI/ML
Machine Learning
DevOps
Rest API
CI/CD
AWS
Analytics
A/B Testing
Apply
Verified live · 2 hours ago 2 months ago Fading · 27%

Staff Python Engineer (Data)

≈ $145k – $257k per year (Estimated) · Staff+ · Hybrid (London, United Kingdom) · Full-Time · Staff
Python
AI/ML
Airflow
Pandas
NumPy
Scale AI
Feature Store
Spark
Machine Learning
DevOps
Docker
Linux
CI/CD
AWS
+4
Apply

BOXT

boxt.co.uk
boxt.co.uk · HQ: Leeds, United Kingdom · Solar Energy · HVAC & Refrigeration · 201-500 employees · Est. 2025 · Startup · Trust A · Hiring 17, 1 new
HQ: Leeds, United Kingdom · Solar Energy · HVAC & Refrigeration · 201-500 employees · Est. 2025 · Startup · Trust A · Hiring 17, 1 new
Fast, fixed-price quotes for boilers, air conditioning, solar, battery, EV chargers & heat pumps. With finance options available.
No named decision-maker yet.
No careers mailbox known
Verified live · 2 hours ago 1 month ago Hiring now · 77%

Senior Backend Engineer (Ruby)

≈ $88k – $171k per year (Estimated) · Senior · 5+ years exp · Hybrid (London, United Kingdom) · Full-Time · Senior
Ruby
TypeScript
SQL
JavaScript
Ruby
Ruby on Rails
RSpec
Sidekiq
Databases
Redis
PostgreSQL
Frontend
Next.js
React.js
DevOps
New Relic
Git
Docker
Kubernetes
CI/CD
AWS
Management
Agile
+10
Apply

incident.io

incident.io
incident.io · HQ: London, United Kingdom · DevOps & Platform Engineering · Incident Response · 201-500 employees · Est. 2021 · Startup · Trust B · Hiring 37, 3 new
HQ: London, United Kingdom · DevOps & Platform Engineering · Incident Response · 201-500 employees · Est. 2021 · Startup · Trust B · Hiring 37, 3 new
incident.io is a software reliability platform company founded in London in 2021 that unifies on-call scheduling, incident response, AI-driven root cause analysis and status pages, with workflows that run inside Slack and Microsoft Teams. It reports more than 2,000 customers, including OpenAI, Netflix, Airbnb and Etsy, has raised over $100 million from investors such as Index Ventures and Insight Partners, and runs offices in London, San Francisco, New York and Boston. It hires product engineers and interns, account executives, business development representatives, customer success managers and engineers and technical support engineers.
No named decision-maker yet.
Careers mailbox is known
Verified live · 18 min ago 1 month ago Long shot · 24%

Product Engineer Summer Internship

$87k per year · Intern · In office (London, United Kingdom) · Bachelor's Degree · Internship · Intern
C#
TypeScript
JavaScript
SQL
Python
Ruby
Ruby
Ruby on Rails
Databases
Google BigQuery
PostgreSQL
Frontend
React.js
DevOps
Kibana
CircleCI
Google GKE
Prometheus
Grafana
Terraform
GCP
Kubernetes
QA
Sentry
+11
Apply
Verified live · 18 min ago 1 month ago Fading · 25%

Product Engineer Placement (6 Months)

$87k per year · In office (London, United Kingdom) · Bachelor's Degree · Full-Time
C#
TypeScript
JavaScript
SQL
Python
Ruby
Ruby
Ruby on Rails
Databases
Google BigQuery
PostgreSQL
Frontend
React.js
DevOps
Kibana
CircleCI
Google GKE
Prometheus
Grafana
Terraform
GCP
Kubernetes
QA
Sentry
+11
Apply
Verified live · 18 min ago 1 month ago Fading · 25%

Product Engineer Placement (1 year)

$87k per year · In office (London, United Kingdom) · Bachelor's Degree · Full-Time
C#
TypeScript
JavaScript
SQL
Python
Ruby
Ruby
Ruby on Rails
Databases
Google BigQuery
PostgreSQL
Frontend
React.js
DevOps
Kibana
CircleCI
Google GKE
Prometheus
Grafana
Terraform
GCP
Kubernetes
QA
Sentry
+11
Apply

AlphaSense

alpha-sense.com
alpha-sense.com · HQ: New York, United States · Market Research · Financial AI · AI Search · Financial Data & Market Intelligence · 1001-5000 employees · Est. 2011 · Trust B · Hiring 172, 10 new
HQ: New York, United States · Market Research · Financial AI · AI Search · Financial Data & Market Intelligence · 1001-5000 employees · Est. 2011 · Trust B · Hiring 172, 10 new
AlphaSense is a market intelligence company founded in 2011 that indexes company filings, earnings call transcripts, broker research, regulatory documents and news, and lets analysts search across all of it at once. Its differentiator is search that understands financial language and synonyms rather than matching keywords, layered with generative summarisation, and it also owns the expert call network Stream, which adds transcripts of interviews with industry specialists. Headquartered in New York and privately held at a multi-billion dollar valuation, it sells mainly to investment firms, corporate strategy teams and consultancies.
Raj Neervannan · Co-founder and Chief Technology Officer · decision-maker
Jack Kokko · Co-founder and Chief Executive Officer · decision-maker
Careers mailbox is known
Verified live · 2 hours ago 1 month ago Fading · 37%

Principal Engineer, Mobile Platform & Backend Systems

≈ $110k – $222k per year (Estimated) · Lead · In office (London, United Kingdom) · Principal
Apache Kafka
Frontend
GraphQL
Mobile
Combine
DevOps
Platform Engineering
Rest API
Cybersecurity
Auth0
Apply

Unity Technologies

unity.com
unity.com · HQ: San Francisco, United States · Advertising · AR & VR Software · Developer Tools · Game Development · 1001-5000 employees · Est. 2004 · Trust A · Hiring 136, 15 new
HQ: San Francisco, United States · Advertising · AR & VR Software · Developer Tools · Game Development · 1001-5000 employees · Est. 2004 · Trust A · Hiring 136, 15 new
Headquartered in San Francisco, California, Unity Software Inc. (Unity Technologies) is a technology enterprise specializing in real-time 3D (RT3D) content development software and engine solutions. The company provides an integrated platform that enables developers, creators, and engineers to build, run, and monetize interactive 2D, 3D, virtual reality (VR), and augmented reality (AR) experiences across mobile, console, PC, and spatial computing hardware. By combining cross-platform runtime engines with developer services, cloud tools, and advertising monetization networks, it serves as a core infrastructure provider for the global gaming industry as well as industrial sectors such as automotive, architecture, and film production.
No named decision-maker yet.
Careers mailbox is known
Verified live · 9 hours ago 1 month ago Fading · 33%

Senior Software Engineer

$75k – $112k per year (gross) · Equity · Senior · In office (Montreal, Canada, Copenhagen, Denmark, London, Brighton, United Kingdom) · Relocation · Full-Time · Senior · English
Apache Kafka
AI/ML
Flink
Game Dev
Unity
Apply

Catapult

catapult.xyz
catapult.xyz · HQ: London, United Kingdom · AI Agents · Startup · Hiring 2
HQ: London, United Kingdom · AI Agents · Startup · Hiring 2
Catapult is the AI agent for ambitious knowledge work. It deeply understands you and your work across email, messages, meetings, documents and tools so it can handle ambitious knowledge work end to end.
No named decision-maker yet.
No careers mailbox known
1 month ago Long shot · 6%

Founding Engineer

≈ $145k – $312k per year (Estimated) · In office (San Francisco, United States, Oslo, Norway, London, United Kingdom)
Rust
TypeScript
C++
SQL
Python
AI/ML
NLP
DevOps
Kubernetes
Apply

Zinc

zincwork.com
zincwork.com · HQ: London, United Kingdom · Human Resources · 51-200 employees · Est. 2017 · Startup · Hiring 12, 1 new
HQ: London, United Kingdom · Human Resources · 51-200 employees · Est. 2017 · Startup · Hiring 12, 1 new
Zinc is a London technology company founded in 2017 that automates employment background checks. Its platform collects references and verifications with the candidate's consent and returns results faster than manual screening. The company works with technology employers and staffing firms across Europe and North America.
No named decision-maker yet.
No careers mailbox known
Verified live · 7 min ago Visa sponsor 1 month ago Long shot · 22%

Senior Full Stack Product Engineer

$94k – $107k per year · Senior · Hybrid (London, United Kingdom) · Full-Time · Senior
TypeScript
JavaScript
Node JS
Node JS
Nest.JS
Frontend
Vue.js
React.js
DevOps
AWS Lambda
API Gateway
Amazon S3
CI/CD
AWS
QA
Cypress
Jest
+5
Apply
Verified live · 7 min ago Visa sponsor 1 month ago Long shot · 22%

Senior Full Stack Engineer

$94k – $107k per year · Senior · Hybrid (London, United Kingdom) · Full-Time · Senior
TypeScript
JavaScript
Node JS
Node JS
Nest.JS
Frontend
Vue.js
React.js
DevOps
AWS Lambda
API Gateway
Amazon S3
CI/CD
AWS
QA
Cypress
Jest
+5
Apply

RVU

rvu.co.uk
rvu.co.uk · HQ: London, United Kingdom · Financial Comparison & Loan Marketplaces · Price Comparison · 201-500 employees · Est. 2018 · Likely startup · Hiring 11, 1 new
HQ: London, United Kingdom · Financial Comparison & Loan Marketplaces · Price Comparison · 201-500 employees · Est. 2018 · Likely startup · Hiring 11, 1 new
RVU is a London company that owns the comparison and switching brands Uswitch, Money.co.uk, Tempcover and Bankrate UK. Its platforms help consumers compare energy, broadband, insurance and financial products and complete the switch online. The group was formed in 2018 when ZPG separated its comparison businesses from its property portals.
No named decision-maker yet.
Careers mailbox is known
Verified live · 1 hour ago 1 month ago Fading · 30%

Senior Software Engineer (GoLang)

≈ $86k – $166k per year (Estimated) · Senior · Hybrid (London, United Kingdom) · Full-Time · Senior
Apply
Machines can read this selection · checked 16:11 UTC
Backend Developer Jobs in London
Frequently asked questions
How many Backend Developer jobs in London are available on Alion?
There are currently 1060 active listings from 474 hiring companies on Alion, refreshed daily.
What salary do Backend Developer jobs in London pay?
The average salary is around $213,465 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.