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
Hardware & Chips
Defense
Aerospace
Biotech
Energy
Robotics
Automotive
MedTech
Science

Trade Republic

traderepublic.com
traderepublic.com • HQ: Berlin, Germany • Investing Apps & Robo-Advisors • Online Brokerage & Trading Platforms • 501-1000 employees • Startup • Trust A • Hiring 44, 2 new
HQ: Berlin, Germany • Investing Apps & Robo-Advisors • Online Brokerage & Trading Platforms • 501-1000 employees • Startup • Trust A • Hiring 44, 2 new
Trade Republic is on a mission to set millions of Europeans up for wealth creation with secure, easy and commission-free access to capital markets. With over one million customers, Trade Republic is already the home screen app for many Europeans ...
No named decision-maker yet.
No careers mailbox known
Verified live · 3 hours ago Visa sponsorship 1 year ago Fading · 27%

Backend Engineer (London)

≈ $89k – $173k per year (Estimated) • Senior • 5+ years exp • Hybrid (London, United Kingdom) • Relocation • Senior
Kotlin
Java
Java
Vert.x
JOOQ
DevOps
GitHub Actions
Kubernetes
CI/CD
AWS
Apply

Mytos

mytos.bio
mytos.bio • HQ: London, United Kingdom • CRO & CDMO Services • Regenerative Medicine • 51-200 employees • Est. 2016 • Startup • Trust C • Hiring 13
HQ: London, United Kingdom • CRO & CDMO Services • Regenerative Medicine • 51-200 employees • Est. 2016 • Startup • Trust C • Hiring 13
Scaling Regenerative Medicine to Millions of Patients. Mytos's Automated Regenerative Medicine CDMO, powered by IDEM, delivers unmatched speed, scale, and efficiency.
Ali Afshar · Executive Officer, Director · decision-maker
Ignacio Willats · Director
No careers mailbox known
Likely inactiveVerified live · 3 hours ago Visa sponsor 1 year ago Long shot · 3%

Junior/Mid Software Engineer

≈ $52k – $120k per year (Estimated) • Equity • Junior • Hybrid (London, United Kingdom) • Full-Time • GMP / cleanroom • Junior
Node JS
TypeScript
Python
C++
JavaScript
Python
FastAPI
C++
Google Test
Node JS
Prisma
Databases
PostgreSQL
AI/ML
Claude Code
Frontend
GraphQL
React.js
Storybook
DevOps
Netlify
Pulumi
Heroku
AWS
Cybersecurity
HIPAA
IoT
MQTT
Management
Linear
+12
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AWTG

awtg.co.uk
awtg.co.uk • HQ: London, United Kingdom • Telecom Infrastructure • IT Consulting & Digital Transformation • Est. 2006 • Trust D • Hiring 43
HQ: London, United Kingdom • Telecom Infrastructure • IT Consulting & Digital Transformation • Est. 2006 • Trust D • Hiring 43
AWTG Ltd. is an end-to-end engineering services and technology solutions provider for companies in Telecommunications, Smart Cities, Industry 4.0, Connected Health, Smart Hospitals, Smart Fashion, New Media, Internet and other markets that employ digital technologies.
No named decision-maker yet.
Careers mailbox is known
Likely inactive Visa sponsor 2 years ago Long shot · 2%

Backend Developer

In office (London, United Kingdom)
PHP
JavaScript
PHP
Laravel
WordPress
PHPUnit
Frontend
JQuery
DevOps
Git
GCP
Rest API
Docker
Management
Kanban
Scrum
Agile
+5
Apply
Likely inactive Visa sponsor 2 years ago Long shot · 2%

Part-Time O-RAN SMO Developer (ONAP-Based)

Hybrid (London, United Kingdom) • Bachelor's Degree • Part-Time
Java
Java
Spring Framework
DevOps
Docker
Linux
Kubernetes
gRPC
Apply
Likely inactive Visa sponsor 2 years ago Long shot · 4%

Python Developer

≈ $84k – $215k per year (Estimated) • Senior • 5+ years exp • Hybrid (London, United Kingdom) • Bachelor's Degree • Full-Time • Senior
Python
Python
FastAPI
AI/ML
RAG
Machine Learning
Fine-tuning
TensorFlow
PyTorch
DevOps
Docker
GCP
Azure
CI/CD
AWS
Git
Analytics
ETL/ELT
+6
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Pigment

pigment.com
pigment.com • HQ: Paris, France • ERP & Business Management Software • Revenue & SaaS Metrics Analytics • 501-1000 employees • Est. 2019 • Startup • Trust B • Hiring 125, 4 new
HQ: Paris, France • ERP & Business Management Software • Revenue & SaaS Metrics Analytics • 501-1000 employees • Est. 2019 • Startup • Trust B • Hiring 125, 4 new
Pigment is a SaaS company that builds planning and performance management software for organisations that need a clearer, faster way to budget, forecast and track results. Many finance and business teams still rely on spreadsheets or older planning tools that are difficult to maintain, slow to update, and hard to share across departments. Pigment’s product is designed to bring financial and operational planning into a single platform, so teams can model different scenarios, collaborate on assumptions, and keep plans aligned as business conditions change.
Romain Niccoli · Legal representative · decision-maker
Careers mailbox is known
Likely inactiveVerified live · 4 hours ago 2 years ago Long shot · 8%

Senior Backend Software Engineer (UK)

≈ $109k – $207k per year (Estimated) • Senior • London • Remote (United Kingdom) • Full-Time • Senior
Rust
Ruby
Go
C#
C++
Java
Python
TypeScript
JavaScript
C#
.NET
Databases
Snowflake
RabbitMQ
PostgreSQL
Frontend
React.js
DevOps
CircleCI
Terraform
Docker
Linux
GCP
Kubernetes
+12
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Decisal

decisal.com
decisal.com • HQ: London, United Kingdom • Commercial Aviation • Custom Software Development • Hiring 1
HQ: London, United Kingdom • Commercial Aviation • Custom Software Development • Hiring 1
Decisal is a software company that develops products enabling airlines worldwide to optimise and analyse their planning and scheduling. It describes itself as having invented methods that increase airline profits, and it is expanding its products with C++ software engineers who work directly with customers. The company is headquartered in London, United Kingdom.
No named decision-maker yet.
No careers mailbox known
Open 850 daysVerified live · 7 hours ago 2 years ago Long shot · 5%

Software Engineer C++

≈ $68k – $167k per year (Estimated) • London • Remote (United Kingdom) • Bachelor's Degree • Full-Time
C++
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Report

Manual

manual.co
manual.co • HQ: London, United Kingdom • Consumer Health Apps • Est. 2018 • Likely startup • Trust D • Hiring 14
HQ: London, United Kingdom • Consumer Health Apps • Est. 2018 • Likely startup • Trust D • Hiring 14
Manual is a London digital health company founded in 2018 that provides men's health treatment and advice online. Its service covers hair loss, sexual health and weight management with clinician review and discreet delivery. The company operates across several European markets.
No named decision-maker yet.
No careers mailbox known
Likely inactiveVerified live · 1 hour ago 2 years ago Long shot · 4%

Senior Backend Engineer

≈ $83k – $162k per year (Estimated) • Senior • 5+ years exp • Hybrid (London, United Kingdom) • Full-Time • Senior
PHP
DevOps
CI/CD
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Ansatz Capital

ansatzcapital.com
ansatzcapital.com • HQ: New York, United States • Hedge Funds & Alternative Investments • 11-50 employees • Est. 2013 • Trust B • Hiring 4
HQ: New York, United States • Hedge Funds & Alternative Investments • 11-50 employees • Est. 2013 • Trust B • Hiring 4
Ansatz Capital is an investment firm with a deeply technical culture, running a Linux-based C++20 and Python research infrastructure in the cloud where everyone programs. Its engineers work on performance engineering and low-latency networking, and it hires software and research engineers in New York and London. The firm is based in New York, United States.
No named decision-maker yet.
No careers mailbox known
Open 974 daysVerified live · 4 hours ago Visa sponsor 2 years ago Long shot · 6%

Software Engineer (London)

≈ $74k – $182k per year (Estimated) • Hybrid (London, United Kingdom) • Full-Time
C++
Python
DevOps
Linux
AWS
Apply
Machines can read this selection · checked 05:08 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.