Backend Developer Jobs in Luxembourg City

Backend Developer jobs in Luxembourg City hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $104,288/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.

Luxembourg City
AI/ML
Data Science
Backend
Frontend
Mobile
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Quantum

Toloka AI

toloka.ai
Toloka is a data company founded in 2014 and headquartered in Amsterdam that supplies human-generated training, fine-tuning and evaluation data for artificial intelligence systems. It began as a large-scale crowdsourcing platform and has repositioned around expert work, combining domain specialists, machine learning tooling and quality control pipelines to produce reasoning traces, preference rankings and agentic task data. Operating within the Nebius group and backed by Bezos Expeditions since 2025, the company serves frontier model laboratories and enterprises building their own systems.
toloka.ai • HQ: Amsterdam, Netherlands • Machine Learning • Data & Analytics • Data Collection • LLM & Generative AI • Artificial Intelligence • 51-200 employees • Est. 2014
HQ: Amsterdam, Netherlands • Machine Learning • Data & Analytics • Data Collection • LLM & Generative AI • Artificial Intelligence • 51-200 employees • Est. 2014
Verified live · 2 hours ago 1 month ago

Freelance Senior Software Engineer | AI Evaluation

Senior • 8+ years exp • Remote (EU, United States, United Kingdom, Serbia) • Freelance • Senior
Python
JavaScript
TypeScript
Python
FastAPI
Databases
Apache Kafka
PostgreSQL
Redis
AI/ML
AI Agents
Claude
Anthropic
Model Context Protocol
OpenAI Codex
Frontend
React.js
DevOps
Docker
Apply
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Tavily

tavily.com
Tavily is a developer infrastructure company headquartered in Tel Aviv, Israel, and founded in 2023. The company runs a search API built for large language model applications, returning ranked and summarised web results in a form agents can consume directly rather than raw pages of markup. It is used by teams building research assistants and autonomous agents, and integrates with common orchestration frameworks such as LangChain and LlamaIndex.
tavily.com • HQ: Tel Aviv, Israel • Data Collection • Data & Analytics • Internet Services • LLM & Generative AI • AI Agents • Artificial Intelligence • Search Engines • Est. 2023
HQ: Tel Aviv, Israel • Data Collection • Data & Analytics • Internet Services • LLM & Generative AI • AI Agents • Artificial Intelligence • Search Engines • Est. 2023
$66k – $189k per year (Estimated) • Senior • 5+ years exp • Remote (Europe, Israel) • Senior
JavaScript
TypeScript
AI/ML
AI Agents
RAG
Frontend
Angular
React.js
Svelte
Vue.js
Mobile
PWA
QA
Chrome DevTools
Playwright
Selenium
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Verified live · 4 hours ago 18 days ago

Senior Software Engineer (Agentic Search) - Web Access Engineer

$67k – $189k per year (Estimated) • Senior • 5+ years exp • Remote (Europe, Israel) • Senior
JavaScript
C++
Go
Python
Rust
AI/ML
RAG
AI Agents
DevOps
Kubernetes
QA
Chrome DevTools
Playwright
Selenium
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Affirm

affirm.com
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.
affirm.com • HQ: San Francisco, United States • Financial Services • Lending • FinTech • 1001-5000 employees • Est. 2012
HQ: San Francisco, United States • Financial Services • Lending • FinTech • 1001-5000 employees • Est. 2012
Verified live · 2 hours ago 1 month ago

Senior Software Engineer, Back-end (Fraud)

$100k – $142k per year • Equity • Senior • 5+ years exp • Remote (Europe) • Visa sponsorship • Internship • Senior
Kotlin
Python
SQL
Databases
MySQL
PostgreSQL
Snowflake
AI/ML
Claude
Claude Code
dbt
DevOps
AWS
CI/CD
Kubernetes
Apply
$83k – $115k per year • Senior • 4+ years expWarsaw • Remote (EU, Europe) • Full-Time • Senior
Kotlin
Python
Databases
MySQL
DevOps
AWS
Kubernetes
Apply
$83k – $115k per year • Senior • 5+ years expWarsaw • Remote (Europe) • Full-Time • Senior
Kotlin
Python
SQL
Databases
MySQL
PostgreSQL
Snowflake
AI/ML
Claude
Claude Code
dbt
DevOps
AWS
CI/CD
Kubernetes
Apply
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Docker

docker.com
Docker is a leading software platform that enables developers to build, share, and run applications inside lightweight, isolated containers. By packaging code together with all its dependencies, the technology ensures that applications run consistently across any computing environment - from local development machines to large-scale cloud infrastructure. The platform accelerates modern software development, simplifying microservices architecture, automated deployment pipelines, and cross-team collaboration.
docker.com • HQ: Palo Alto, United States • Software • Information Technology • Virtualization • DevOps • Est. 2011
HQ: Palo Alto, United States • Software • Information Technology • Virtualization • DevOps • Est. 2011
$96k – $182k per year (Estimated) • Senior • 8+ years expLondon • Remote (EU, United States, Canada) • Visa sponsorship • Bachelor's Degree • Full-Time • Senior
AI Agents
Claude
Claude Code
Model Context Protocol
OpenAI Codex
DevOps
Docker
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Circle

circle.com
Circle is a global financial technology company best known as the issuer of USD Coin (USDC) and EURC, two of the world's leading fully backed digital stablecoins. Headquartered in New York City, New York, the firm builds open financial infrastructure and developer APIs that enable internet-native payment settlement, treasury management, and blockchain integration. By bridging traditional banking networks with public blockchain systems, it allows businesses worldwide to store, send, and trade digital value seamlessly.
circle.com • HQ: New York, United States • Financial Services • Stablecoins • Blockchain & Crypto • Est. 2013
HQ: New York, United States • Financial Services • Stablecoins • Blockchain & Crypto • Est. 2013
$130k – $140k per year • Senior • 5+ years exp • Remote • Senior
Ruby
TypeScript
JavaScript
Ruby
Ruby on Rails
Databases
MySQL
PostgreSQL
Frontend
Next.js
React.js
Tailwind CSS
Analytics
A/B Testing
Apply
$130k – $140k per year • Senior • 6+ years exp • Remote • Senior
Ruby
JavaScript
Ruby
Ruby on Rails
Databases
MySQL
PostgreSQL
AI/ML
AI Agents
LLM
RAG
Edge AI
Frontend
React.js
Analytics
A/B Testing
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Tether

tether.to
Tether is a digital asset company founded in 2014 that issues USDT, the largest stablecoin in circulation and the most heavily traded asset in crypto markets. Each token is intended to hold a one-to-one peg with the United States dollar and is backed by a reserve portfolio dominated by short-dated Treasury bills, with regular attestation reports published on the reserve composition. Headquartered in San Salvador, El Salvador, the group has expanded beyond stablecoin issuance into gold-backed tokens, Bitcoin mining, energy, peer-to-peer communications and local artificial intelligence infrastructure.
tether.to • HQ: San Salvador, El Salvador • Crypto Payments • Data Centers • Artificial Intelligence • Blockchain & Crypto • Cryptocurrencies • Stablecoins • 1001-5000 employees • Est. 2014
HQ: San Salvador, El Salvador • Crypto Payments • Data Centers • Artificial Intelligence • Blockchain & Crypto • Cryptocurrencies • Stablecoins • 1001-5000 employees • Est. 2014
$90k – $220k per year (Estimated) • Senior • Remote • Senior
Node JS
JavaScript
C++
AI/ML
Tokenization
Frontend
npm
Web3
Bitcoin
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Verified live · 1 day ago 2 months ago

Senior Software Architect (100% Remote - Worldwide)

$150k – $281k per year (Estimated) • Staff+ • 5+ years exp • Remote • Architect • English: B2
Node JS
JavaScript
AI/ML
Tokenization
Web3
Bitcoin
Ethereum
Smart Contracts
Token Standards
Apply
Verified live · 1 day ago 2 months ago

Senior Software Architect (100% Remote - Worldwide)

$150k – $281k per year (Estimated) • Staff+ • 5+ years exp • Remote • Architect • English: B2
Node JS
JavaScript
AI/ML
Tokenization
Web3
Bitcoin
Ethereum
Smart Contracts
Token Standards
Apply
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Agency AI

agency.ai
Agency AI is a developer platform and enterprise consulting firm specializing in AI agent observability, testing, and deployment, headquartered in San Francisco, California. Founded in 2023 by Alex Reibman, Adam Silverman, and Shawn Qiu, the company developed AgentOps, an industry-standard observability and evaluation tool suite that allows developers to monitor, debug, and optimize multi-agent autonomous workflows in real time across frameworks like AutoGen and CrewAI.
agency.ai • HQ: San Francisco, United States • AI Agents • Est. 2023
HQ: San Francisco, United States • AI Agents • Est. 2023
Open 118 daysVerified live · 2 days ago 3 months ago

3D Modeling & Python Specialist - Freelance AI Trainer Project

Remote (Luxembourg, United States, Singapore) • Freelance
JavaScript
Python
AI/ML
Structured Outputs
Frontend
Three.JS
Design
Blender
ZBrush
Apply
$160k – $300k per year • Remote (United States, Luxembourg, Singapore) • Bachelor's Degree • Freelance
JavaScript
Python
TypeScript
DevOps
Platform Engineering
Apply
$160k – $300k per year • Remote (Luxembourg, United States, Singapore) • Bachelor's Degree • Freelance
Java
DevOps
Platform Engineering
Apply
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Openhomefoundation

openhomefoundation.org
The Open Home Foundation fights for the principles of privacy, choice, and sustainability for smart homes. And for every person who lives in one. It does this by supporting the development of open source projects, and open connectivity and communication standards.
openhomefoundation.org • Wireless • Smart Home Devices
Wireless • Smart Home Devices
Verified live · 2 days ago 21 day ago

Senior Python Engineer

$66k – $187k per year (Estimated) • Senior • 5+ years exp • Remote (Europe) • Full-Time • Senior
Python
Python
Asyncio
AI/ML
llama.cpp
LLM
Model Context Protocol
Ollama
AI Agents
Edge AI
Function Calling
DevOps
Git
GitHub
IoT
Matter
Apply
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Customer.io

customer.io
Customer.io, legally Peaberry Software, Inc., is a customer engagement software company headquartered in Portland, Oregon, and founded in 2012. The company provides a platform that enables businesses to automate personalized messaging across email, SMS, push notifications, and in-app channels based on real-time customer behavior and data. Serving over 9,000 brands globally, the organization operates as a remote-first company with a focus on data-driven marketing automation and artificial intelligence integration for B2B and B2C enterprises.
customer.io • HQ: Portland, United States • Software • Customer Analytics • Data & Analytics • AI Agents • Artificial Intelligence • Sales & Marketing • Email Marketing • Marketing Automation • Est. 2012
HQ: Portland, United States • Software • Customer Analytics • Data & Analytics • AI Agents • Artificial Intelligence • Sales & Marketing • Email Marketing • Marketing Automation • Est. 2012
Open 150 daysTop 25% pay 4 months ago

Senior Software Engineer, Full Stack

$150k – $200k per year • Senior • 7+ years exp • Remote (AMER, EMEA) • Senior
Go
TypeScript
JavaScript
AI/ML
AI Agents
Frontend
React.js
Apply
Open 149 daysTop 25% pay 4 months ago

Senior Software Engineer, Backend

$150k – $200k per year • Senior • 7+ years exp • Remote (AMER, EMEA) • Senior
Go
Databases
MySQL
AI/ML
AI Agents
DevOps
AWS
GCP
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LiveKit

livekit.io
LiveKit is an open-source real-time audio, video, and AI voice infrastructure platform headquartered in San Francisco. The company provides cloud and developer infrastructure designed to build ultra-low-latency video conferencing, live streaming, and interactive multimodal AI voice agents into web and mobile applications. Powered by flexible SDKs and scalable server orchestration, LiveKit is widely used by developers and enterprise teams to deploy real-time voice and video applications at global scale.
livekit.io • HQ: San Francisco, San Jose, United States • Artificial Intelligence • AI Agents • Speech & Audio AI • Est. 2021
HQ: San Francisco, San Jose, United States • Artificial Intelligence • AI Agents • Speech & Audio AI • Est. 2021
Open 594 daysTop 25% pay 1 year ago

Software Engineer, Agents

$135k – $300k per year • Equity • Remote (EMEA, North America) • Full-Time
Python
TypeScript
AI/ML
AI Agents
LLM
LiveKit
OpenAI
Marketing
Salesforce
Apply
Top 25% payVerified live · 2 hours ago 1 month ago

Staff Software Engineer, Distributed Systems

$135k – $300k per year • Equity • Staff+ • Remote (EMEA, North America) • Full-Time • Staff
Go
Databases
ClickHouse
NATS
AI/ML
Multimodal AI
LiveKit
OpenAI
DevOps
gRPC
Kubernetes
OpenTelemetry
Prometheus
GitHub
etcd
Apply
Top 25% payVerified live · 2 hours ago 2 months ago

Senior Software Engineer, Distributed Systems

$135k – $300k per year • Equity • Senior • Remote (EMEA, North America) • Full-Time • Senior
Go
Databases
ClickHouse
NATS
AI/ML
Multimodal AI
LiveKit
OpenAI
DevOps
gRPC
Kubernetes
OpenTelemetry
Prometheus
GitHub
etcd
Apply
Report

Bitcoin

bitcoin.com
Bitcoin kopen, verkopen en opslaan, live crypto-nieuws en koersen volgen, en ontdekken hoe Bitcoin werkt — alles op één plek. Al meer dan 10 jaar een vertrouwde partner.
bitcoin.com • Warsaw • Dubai • DeFi • Blockchain & Crypto • Cryptocurrencies • Est. 2015
Warsaw • Dubai • DeFi • Blockchain & Crypto • Cryptocurrencies • Est. 2015
Verified live · 6 hours ago 21 day ago

Senior Software Engineer (L2)

$90k – $221k per year (Estimated) • Senior • 5+ years exp • Remote (Europe) • Bachelor's Degree • Contractor • Senior
Java
Kotlin
Rust
AI/ML
Claude
Claude Code
Mobile
Room
DevOps
AWS
CI/CD
Rest API
New Relic
Cybersecurity
PCI DSS
Web3
Bitcoin
Token Standards
QA
Sentry
Apply
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GitLab

gitlab.com
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.
gitlab.com • HQ: San Francisco, United States • Information Technology • Cybersecurity • DevSecOps • DevOps • 1001-5000 employees • Est. 2011
HQ: San Francisco, United States • Information Technology • Cybersecurity • DevSecOps • DevOps • 1001-5000 employees • Est. 2011
Verified live · 6 min ago 1 month ago

Senior Backend Engineer (Ruby), AI Engineering: AI Coding

$88k – $167k per year (Estimated) • Equity • Senior • Remote (Europe) • PhD • Full-Time • Senior
Python
Ruby
AI/ML
AI Agents
DevOps
CI/CD
Jenkins
GitLab
Management
Jira
Slack
Apply
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Oyster

oysterhr.com
Opportunities for all Where you are shouldn't govern what you do. We're changing the way the world works—one brilliant remote hire at a time.
oysterhr.com • Austin • Toronto • Chicago • Charlotte • Denver • Professional Services • Human Resources
Austin • Toronto • Chicago • Charlotte • Denver • Professional Services • Human Resources
Verified live · 8 hours ago 21 day ago

Senior Engineer (Platform)

Senior • 5+ years exp • Remote (EMEA) • Full-Time • Senior • English: C1
Ruby
Ruby
Ruby on Rails
DevOps
AWS
CI/CD
Datadog
Platform Engineering
Terraform
Heroku
QA
Sentry
Apply
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DistroKid

distrokid.com
DistroKid is a software platform that helps musicians and other audio creators get their music into major digital stores and streaming services. Its core job is to take the practical work out of digital distribution, so artists can upload tracks, manage releases and credits, and keep their catalogue available across multiple services without having to negotiate separate deals or handle complex delivery requirements themselves. For creators, the problem it solves is straightforward but important, reducing the friction, time and administrative overhead involved in releasing music widely and reliably.
distrokid.com • New York • Streaming & OTT Platforms • Music Industry • Software
New York • Streaming & OTT Platforms • Music Industry • Software
Open 213 daysVerified live · 6 hours ago 7 months ago

API Engineer

$190k per year • Staff+ • 10+ years exp • Remote (EU, United States, United Kingdom) • Visa sponsorship • Staff
Apex
Apex
MuleSoft
AI/ML
Edge AI
DevOps
AWS
Azure
Kong
API Gateway
Apply
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Kestra

kestra.ai
kestra.ai • HQ: Paris, France
HQ: Paris, France
Verified live · 2 days ago 25 days ago

Full Stack Engineer, Data Orchestration

Remote (Europe) • Full-Time
Java
SQL
TypeScript
JavaScript
Java
Micronaut
Quarkus
Spring Boot
Databases
Databricks
Google BigQuery
MySQL
PostgreSQL
Snowflake
Apache Kafka
ElasticSearch
AI/ML
Dagster
dbt
Prefect
AI Agents
Frontend
Pinia
React.js
Vite
Vue.js
DevOps
CI/CD
Docker
Rest API
GitHub
AWS
Azure
GCP
Kubernetes
Apply
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Coder Technologies

coder.com
Coder is an enterprise cloud development environment (CDE) and developer workspace management platform headquartered in Austin, Texas. Founded in 2017 by Ammar Bandukwala, Kyle Carberry, and John Andrew Entwistle, the company is led by CEO Rob Whiteley and has raised over $170 million in venture funding - including a Series C led by KKR alongside investors such as Bessemer Venture Partners, Redpoint Ventures, and Uncork Capital.
coder.com • HQ: Austin, United States • Artificial Intelligence • Code Intelligence • Information Technology • DevOps • 51-200 employees • Est. 2017
HQ: Austin, United States • Artificial Intelligence • Code Intelligence • Information Technology • DevOps • 51-200 employees • Est. 2017
Verified live · 1 day ago 25 days ago

Senior Partner Deployed Engineer

$70k – $200k per year (Estimated) • Senior • 7+ years exp • Remote (Europe) • Full-Time • Senior • French: C1 • German: C1
AI Agents
LiteLLM
LLM
OpenRouter
EU AI Act
Human-in-the-Loop
Model Context Protocol
Scale AI
DevOps
AWS
Azure
GCP
Kubernetes
Terraform
IAM
Cybersecurity
GDPR
Apply
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Huzzle

huzzle.app
Huzzle is an early careers platform connecting students, societies, and employers. Starting out as a CRM for pre-professional student societies, Huzzle has evolved into the university career companion used by over 100,000 talents in the UK.
huzzle.app • HQ: London, United Kingdom • Professional Services • Education • Human Resources • 1001-5000 employees
HQ: London, United Kingdom • Professional Services • Education • Human Resources • 1001-5000 employees
Verified live · 1 day ago 26 days ago

FullStack Engineer - German speaking

$71k – $164k per year (Estimated) • Junior • 2+ years exp • Remote (Germany, Austria, Belgium, Switzerland, Luxembourg) • Full-Time • Junior • German: C2
Node JS
TypeScript
JavaScript
Databases
PostgreSQL
Supabase
AI/ML
Claude
Claude Code
AI Agents
Frontend
React.js
Apply
Report

Creatunity LLC

creatunity.com
We are based in the wonderful city of Dallas, Texas and was founded in 2005 on a desire to help bring the web to local businesses. We are a small agency with a highly focused, creative and fun group of web marketing professionals that love what we...
creatunity.com • Warsaw • Amsterdam • London • Prague • Zagreb • Sales & Marketing • Design & Creative • Web Design
Warsaw • Amsterdam • London • Prague • Zagreb • Sales & Marketing • Design & Creative • Web Design
Verified live · 1 day ago 27 days ago

Lead Full Stack Engineer (AI-first) | Remote (from Europe)

$71k – $118k per year (Estimated) • Lead • Warsaw • Remote (Europe) • Bachelor's Degree • Full-Time • Staff
TypeScript
JavaScript
Node JS
Node JS
Prisma
Databases
PostgreSQL
Supabase
AI/ML
Claude
Cursor
OpenAI
Frontend
Next.js
React.js
DevOps
Vercel
Apply
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Omnygroup

omnygroup.co.uk
Omny Group offers professional services in Human Resources, Law, Health & Safety, & Employee Benefits, tailored to support your business needs.
omnygroup.co.uk • San Francisco • New York • London • Legal Services • Professional Services • Human Resources
San Francisco • New York • London • Legal Services • Professional Services • Human Resources
Top 25% payVerified live · 8 hours ago 27 days ago

Forward Deployed Software Engineer (EU)

$180k – $240k per year • Senior • 5+ years exp • Remote (EU) • Full-Time • Senior
JavaScript
Python
SQL
TypeScript
Python
Django
Databases
PostgreSQL
Frontend
GraphQL
Next.js
React.js
DevOps
AWS
WebRTC
Marketing
HubSpot
Apply
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SentinelOne

sentinelone.com
SentinelOne is an American cybersecurity company founded in 2013 and headquartered in Mountain View, California that builds autonomous endpoint and cloud protection. Its Singularity platform runs behavioural AI models directly on each protected device, so threats can be detected, blocked and rolled back without waiting for a cloud signature lookup or an analyst decision. The platform has expanded from endpoint detection into cloud workload security, identity threat protection and a security data lake, and the company has traded on the New York Stock Exchange since 2021.
sentinelone.com • HQ: Mountain View, United States • Threat Intelligence • Security Operations • Cybersecurity • Artificial Intelligence • Cybersecurity AI • Cloud Security • Endpoint Security • 1001-5000 employees • Est. 2013
HQ: Mountain View, United States • Threat Intelligence • Security Operations • Cybersecurity • Artificial Intelligence • Cybersecurity AI • Cloud Security • Endpoint Security • 1001-5000 employees • Est. 2013
Open 417 daysVerified live · 1 hour ago 1 year ago

Staff Windows Low Level C++ Engineer - Endpoint security

$91k – $158k per year (Estimated) • Equity • Staff+ • Remote (EU) • Relocation • Full-Time • Staff
C++
Cybersecurity
SentinelOne
Apply
Open 110 daysVerified live · 1 hour ago 3 months ago

Staff Windows Low Level C++ Engineer - Endpoint security

$77k – $160k per year (Estimated) • Equity • Staff+ • Remote (EU) • Relocation • Full-Time • Staff
C++
Cybersecurity
SentinelOne
Apply
Open 412 daysVerified live · 1 hour ago 1 year ago

Staff Windows Low Level C++ Engineer - Endpoint security

$75k – $156k per year (Estimated) • Equity • Staff+ • Remote (EU) • Relocation • Full-Time • Staff
C++
Cybersecurity
SentinelOne
Apply
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Backend Developer Jobs in Luxembourg City
Frequently asked questions
How many Backend Developer jobs in Luxembourg City are available on Alion?
There are currently 16 active listings from 7 hiring companies on Alion, refreshed daily.
What salary do Backend Developer jobs in Luxembourg City pay?
The average salary is around $104,288 per year based on the current listings.
Are remote options available for Backend Developer jobs in Luxembourg City?
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 Luxembourg City?
Open any listing on Alion and apply directly with the employer through the provided link - no lengthy sign-up required.