3295 Ofertas de Javascript en Madrid
Senior Software Engineer (Python + JavaScript)
Publicado hace 11 días
Trabajo visto
Descripción Del Trabajo
**The Applied Data Science Center:**
Our Applied Data Science Center (ADSC) harnesses our global healthcare insights, working closely with our clinical and therapeutic experts to power evidence-driven design, speed site activation and recruit the right patients, faster. We are using big data and advanced analytics to derive insights that transform clinical development and bring new medicines to patients faster through successful trial delivery.
This multi-functional team is an innovation for our business, requiring entrepreneurial and independent thinking to build our capability. Unique and with a global view, this Center of Excellence is a chance to revolutionize the clinical research industry.
**Senior Engineer - The Role**
As a Senior Software Engineer, you will work with an enormous breadth of data to design and develop data science applications. Collaborating with business owners, subject matter experts, and go-to-market teams, you will build innovative solutions to support clinical trials, optimize their design and execution, and improve risk management. You will be involved in every stage of the product development lifecycle, working with data scientists to turn prototypes into well-abstracted reusable services, and build software to expose data science models to business users through responsive UIs. Supporting a culture of continuous improvement, you will also provide architectural guidance, shape coding standards, and mentor engineers and data scientists.
**Key Responsibilities:**
+ Consistently deliver robust, high-quality, reliable engineering outcomes in cross-functional autonomous scrum teams.
+ Develop automated CI/CD pipelines that deploy to both on-premises clusters and the cloud.
+ Research current and emerging industry tools and techniques, sharing findings with colleagues.
+ Improve product quality through rigorous automated testing and continuous integration.
+ Coordinate with data scientists, facilitating their development and helping them write production-grade code.
+ Drive curiosity and innovation, establishing and enforcing standards.
+ Facilitate cross-team knowledge sharing.
+ Design and lead engineering efforts for building business applications.
+ Collaborate with engineers and leaders from other organizations inside the company.
+ Support product owners by understanding business requirements and helping the team break these into stories.
+ Lead documentation efforts for product architecture and security compliance.
+ Lead security assessments and product readiness evaluations.
+ Perform code reviews and provide constructive feedback for work submitted by other engineers.
+ Mentor interns, apprentices, and other engineers.
**Qualifications:**
+ Good verbal and written communication skills.
+ 5+ years of relevant collaborative software engineering experience.
+ 2+ years full-time engineering experience across at least two different companies.
+ Solid understanding of computer science fundamentals.
+ Expert familiarity with backend development (Python) or frontend development using a JavaScript framework such as React.js, with familiarity in both areas required.
+ Knowledge of Agile methodology and experience working in a collaborative Agile environment.
+ Experience designing applications using a microservices architecture.
+ Knowledge of Kubernetes or another container orchestration platform.
+ Experience with relational databases.
+ Experience deploying code into production through CI/CD tools.
+ Experience building RESTful APIs.
+ Knowledge of Linux command line tools.
+ Demonstrated in-depth understanding of product development lifecycle.
+ Demonstrated aptitude for and interest in peer mentorship.
**Preferred Qualifications:**
+ Experience working with cloud platforms (AWS, Azure, Google Cloud, etc.)
+ Experience with building, testing, measuring, and deploying machine learning models in production.
+ Experience working with large volumes of complex data with workflow management tools like Airflow.
+ Experience with non-relational databases.
+ Knowledge of UX principles.
+ Experience with the clinical domain and regulated data.
**About You:**
+ Impactful: Take initiative and lead team members to turn ideas into real features. Passionate about discussing use cases and user flows with product managers and designers and contributing ideas to those discussions.
+ Front-End Focused: Love working proactively with product management and UX to refine and iterate on specifications as the product takes shape.
+ Quality-Focused: Write well-tested code that performs well and fails gracefully.
+ Customer-Focused: Have opinions about how users will use the product and what problems they might encounter. Interested in and willing to dive into and understand customers' problems.
+ Driven: Set challenging goals for yourself and push to meet them. Have a passion for delivering high-quality work quickly and enjoy working at a fast pace.
+ Collaborative: Enjoy collaborating with, learning from, and teaching others. Treat colleagues with honesty, kindness, and respect, and actively create a positive work environment.
+ Humble: Unafraid to ask questions when you do not know the answer and approach disagreements with the possibility that you might be wrong.
IQVIA is a leading global provider of clinical research services, commercial insights and healthcare intelligence to the life sciences and healthcare industries. We create intelligent connections to accelerate the development and commercialization of innovative medical treatments to help improve patient outcomes and population health worldwide. Learn more at is a leading global provider of clinical research services, commercial insights and healthcare intelligence to the life sciences and healthcare industries. We create connections that accelerate the development and commercialization of innovative medical treatments. Everything we do is part of a journey to improve patient outcomes and population health worldwide.
To get there, we seek out diverse talent with curious minds and a relentless commitment to innovation and impact. No matter your role, everyone at IQVIA contributes to our shared goal of helping customers improve the lives of patients everywhere. Thank you for your interest in growing your career with us.
EEO Minorities/Females/Protected Veterans/Disabled
Javascript Senior Software Engineer (AI SDK)
Publicado hace 16 días
Trabajo visto
Descripción Del Trabajo
Join Tether and Shape the Future of Digital Finance
At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.
Innovate with Tether
Tether Finance : Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.
But that’s just the beginning:
Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.
Tether Data : Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.
Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.
Tether Evolution : At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.
Why Join Us?
Our team is a global talent powerhouse, working remotely from every corner of the world. If you’re passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We’ve grown fast, stayed lean, and secured our place as a leader in the industry.
If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.
Are you ready to be part of the future?
About the job:
As a Senior SDK Developer, you will be a part of the team that works on the development of the new and cutting edge Tether AI SDK.
Developer-Facing SDKs & APIs
Tether is committed to delivering world-class developer experiences through robust and intuitive SDKs. You will design, build, and maintain modular, versioned SDKs that abstract complex backend logic into clean, usable interfaces — enabling seamless integration with Tether’s platform across various client environments.Performance & Reliability at Scale
SDKs must be fast, lightweight, and reliable — even when performing heavy and demanding operations. You’ll design resilient logic (retry policies, offline handling, batching) and contribute to the scalability of platform-facing interfaces and services powering the SDKs.
Security-First Engineering
You’ll embed best-in-class security practices directly into the SDK architecture, including secure communication, encrypted storage and rigorous input validation. Your work will help ensure safe integration pathways for all developers working with the Tether ecosystem.
+6 years of experience working with Nodejs/JavaScript in production environments.
Proven track record in designing and maintaining developer-facing SDKs (npm packages, API clients, or instrumentation libraries)
Strong understanding of modular architecture, versioning strategies, and semantic API design
Have actively participated in the development of a complex platform
Ability to quickly learn new technologies
Good understanding of security practices
Nice to have
Familiar with Peer-to-Peer technologies (Kademlia, bittorent, libp2p)
Comfortable with high-availability concepts
Rust or C++ skills are a plus
Familiar with AI domain applications (RAG, Agents, Inference, AI SDKs)
Familiarity with real-time data delivery (NodeJS/other streaming)
Javascript Senior Software Engineer (AI Apps)
Publicado hace 23 días
Trabajo visto
Descripción Del Trabajo
Join Tether and Shape the Future of Digital Finance
At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.
Innovate with Tether
Tether Finance : Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.
But that’s just the beginning:
Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.
Tether Data : Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.
Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.
Tether Evolution : At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.
Why Join Us?
Our team is a global talent powerhouse, working remotely from every corner of the world. If you’re passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We’ve grown fast, stayed lean, and secured our place as a leader in the industry.
If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.
Are you ready to be part of the future?
About the job:
As a Senior Software Developer, you will be a part of the team that building desktop and mobile AI apps on top of new and cutting edge Tether SDK.
Responsibilities:
AI-Driven Desktop Integration
You will develop and maintain backend services and APIs that power AI-enhanced desktop applications. These services support intelligent features like local inference, contextual awareness, and model interaction, tailored specifically for Electron-based or hybrid clients.Platform-Aware API Design
Collaborating closely with desktop and React Native teams, you will shape API contracts that reflect platform constraints and performance considerations — ensuring native-like responsiveness and cross-platform consistency.Scalable Model Invocation & Resource Management
You’ll contribute to backend services that handle concurrent model invocations, manage GPU/CPU workloads, and intelligently queue or throttle requests based on system constraints — ensuring smooth AI on-device performance.
+6 years of experience working with Nodejs/JavaScript.
Experience with Desktop app development (Electron, Tauri, other)
Experience working with React Native or bridging backend systems into mobile/desktop hybrid stacks
Experience optimizing performance and resource usage on desktop/mobile clients
Have actively participated in the development of a complex platform
Ability to quickly learn new technologies
Good understanding of security practices
Nice to have
Familiarity with secure inter-process communication
Familiar with Peer-to-Peer technologies (Kademlia, bittorent, libp2p)
C++/Swift/Kotlin skills are a plus
Familiar with AI/Agentic domain applications (RAG, AI SDKs)
Familiarity with real-time data delivery (NodeJS/other streaming)
Javascript Senior Software Engineer (AI SDK)
Publicado hace 2 días
Trabajo visto
Descripción Del Trabajo
Join Tether and Shape the Future of Digital Finance
At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.
Innovate with Tether
Tether Finance : Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.
But that’s just the beginning:
Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.
Tether Data : Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.
Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.
Tether Evolution : At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.
Why Join Us?
Our team is a global talent powerhouse, working remotely from every corner of the world. If you’re passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We’ve grown fast, stayed lean, and secured our place as a leader in the industry.
If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.
Are you ready to be part of the future?
About the job:
As a Senior SDK Developer, you will be a part of the team that works on the development of the new and cutting edge Tether AI SDK.
Developer-Facing SDKs & APIs
Tether is committed to delivering world-class developer experiences through robust and intuitive SDKs. You will design, build, and maintain modular, versioned SDKs that abstract complex backend logic into clean, usable interfaces — enabling seamless integration with Tether’s platform across various client environments.Performance & Reliability at Scale
SDKs must be fast, lightweight, and reliable — even when performing heavy and demanding operations. You’ll design resilient logic (retry policies, offline handling, batching) and contribute to the scalability of platform-facing interfaces and services powering the SDKs.
Security-First Engineering
You’ll embed best-in-class security practices directly into the SDK architecture, including secure communication, encrypted storage and rigorous input validation. Your work will help ensure safe integration pathways for all developers working with the Tether ecosystem.
+6 years of experience working with Nodejs/JavaScript in production environments.
Proven track record in designing and maintaining developer-facing SDKs (npm packages, API clients, or instrumentation libraries)
Strong understanding of modular architecture, versioning strategies, and semantic API design
Have actively participated in the development of a complex platform
Ability to quickly learn new technologies
Good understanding of security practices
Nice to have
Familiar with Peer-to-Peer technologies (Kademlia, bittorent, libp2p)
Comfortable with high-availability concepts
Rust or C++ skills are a plus
Familiar with AI domain applications (RAG, Agents, Inference, AI SDKs)
Familiarity with real-time data delivery (NodeJS/other streaming)
Javascript Senior Software Engineer (AI Apps)
Publicado hace 3 días
Trabajo visto
Descripción Del Trabajo
Join Tether and Shape the Future of Digital Finance
At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.
Innovate with Tether
Tether Finance : Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.
But that’s just the beginning:
Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.
Tether Data : Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.
Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.
Tether Evolution : At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.
Why Join Us?
Our team is a global talent powerhouse, working remotely from every corner of the world. If you’re passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We’ve grown fast, stayed lean, and secured our place as a leader in the industry.
If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.
Are you ready to be part of the future?
About the job:
As a Senior Software Developer, you will be a part of the team that building desktop and mobile AI apps on top of new and cutting edge Tether SDK.
Responsibilities:
AI-Driven Desktop Integration
You will develop and maintain backend services and APIs that power AI-enhanced desktop applications. These services support intelligent features like local inference, contextual awareness, and model interaction, tailored specifically for Electron-based or hybrid clients.Platform-Aware API Design
Collaborating closely with desktop and React Native teams, you will shape API contracts that reflect platform constraints and performance considerations — ensuring native-like responsiveness and cross-platform consistency.Scalable Model Invocation & Resource Management
You’ll contribute to backend services that handle concurrent model invocations, manage GPU/CPU workloads, and intelligently queue or throttle requests based on system constraints — ensuring smooth AI on-device performance.
+6 years of experience working with Nodejs/JavaScript.
Experience with Desktop app development (Electron, Tauri, other)
Experience working with React Native or bridging backend systems into mobile/desktop hybrid stacks
Experience optimizing performance and resource usage on desktop/mobile clients
Have actively participated in the development of a complex platform
Ability to quickly learn new technologies
Good understanding of security practices
Nice to have
Familiarity with secure inter-process communication
Familiar with Peer-to-Peer technologies (Kademlia, bittorent, libp2p)
C++/Swift/Kotlin skills are a plus
Familiar with AI/Agentic domain applications (RAG, AI SDKs)
Familiarity with real-time data delivery (NodeJS/other streaming)
JavaScript Developer
Publicado hace 20 días
Trabajo visto
Descripción Del Trabajo
4 weeks ago Be among the first 25 applicants
Join Plexus Tech. We are looking for a JavaScript developer with at least 4 years of experience developing with Front-end technologies (Vanilla JavaScript, HTML, CSS, etc.)
Requirements
- Vanilla JavaScript.
- Experience in unit testing.
- Experience with Jenkins and Sonar.
- Good programming practices.
- Experience working in Agile/Scrum.
Work with leading professionals
Access to ongoing training.
Professional development
Flexible compensation with health insurance, meal vouchers, childcare, and transportation
JavaScript, HTML, CSS,
Seniority level
- Seniority level Mid-Senior level
- Employment type Full-time
- Job function Engineering and Information Technology
- Industries IT Services and IT Consulting
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#J-18808-LjbffrJavaScript Developer
Publicado hace 4 días
Trabajo visto
Descripción Del Trabajo
4 weeks ago Be among the first 25 applicants
Join Plexus Tech. We are looking for a JavaScript developer with at least 4 years of experience developing with Front-end technologies (Vanilla JavaScript, HTML, CSS, etc.)
Requirements
- Vanilla JavaScript.
- Experience in unit testing.
- Experience with Jenkins and Sonar.
- Good programming practices.
- Experience working in Agile/Scrum.
Work with leading professionals
Access to ongoing training.
Professional development
Flexible compensation with health insurance, meal vouchers, childcare, and transportation
JavaScript, HTML, CSS,
Seniority level
- Seniority level Mid-Senior level
- Employment type Full-time
- Job function Engineering and Information Technology
- Industries IT Services and IT Consulting
Referrals increase your chances of interviewing at Plexus Tech by 2x
Madrid, Community of Madrid, Spain 10 months ago
Madrid, Community of Madrid, Spain 6 days ago
Madrid, Community of Madrid, Spain 6 months ago
Madrid, Community of Madrid, Spain 11 months ago
Madrid, Community of Madrid, Spain 1 month ago
Madrid, Community of Madrid, Spain 2 months ago
Madrid, Community of Madrid, Spain €45,000.00-€60, months ago
Madrid, Community of Madrid, Spain 7 months ago
Madrid, Community of Madrid, Spain 6 months ago
Madrid, Community of Madrid, Spain 1 week ago
Frontend software engineer (React) - Europe RemoteMadrid, Community of Madrid, Spain $35,000.00-$0,000.00 2 months ago
Spain 100,000.00- 150,000.00 2 months ago
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