Remote Backend Developer jobs open to Spain.

Python · AWS · Kubernetes

4 years of experience, Python, Go, PostgreSQL, AWS, Docker, Kubernetes, Event-driven architectures, Kafka, Graph database, Cybersecurity background, Data encryption patterns

Horizon3 AIHorizon3.ai is a remote cybersecurity company specializing in the NodeZero autonomous pentesting SaaS platform, serving global enterprises and federal agencies in the B2B sector.

Python · Kotlin · AWS

8 years of experience, Python, Kotlin, AWS, MySQL, Spark, Kubernetes, Distributed systems, Technical strategy, KYC Verification, Identity Data Management, Global regulatory compliance

AffirmAffirm is a U.S.-based fintech company offering a buy now, pay later (BNPL) service that allows consumers to make purchases in installments, primarily targeting the retail sector with both B2C and B2B business models.

GraphQL · SQL · AWS

7 years of experience, EDR platform familiarity, GraphQL backend development, Third-party API integrations at scale, ETL pipeline development, Cloud platform experience (AWS, Azure, GCP), SQL expertise, Technical documentation skills

Horizon3 AIHorizon3.ai is a remote cybersecurity company specializing in the NodeZero autonomous pentesting SaaS platform, serving global enterprises and federal agencies in the B2B sector.

Java · Kotlin · AWS

Kotlin, Java, Spring Boot Reactive, AWS, Docker, Kubernetes, Kafka, Redis, Multi-threaded architectures, Web services, Caching, Customer-first mindset

VonageVonage is a Holmdel Township, NJ-based cloud communications provider specializing in unified communications and contact center solutions for B2B and B2C markets globally.

Linux kernel development, x86 computing architecture, Virtualization technologies, Open-source software development, Performance optimization, Low-level debugging tools, Memory management, Collaboration with open-source communities

AWS · Kubernetes · Docker

5 years of experience, Distributed backend systems, Web3 platform components, AI-assisted workflows, Strong ownership mindset, Client collaboration, Fast-paced startup environment, High code quality standards, Algorithms and data structures, Containerized systems: Docker & Kubernetes, AWS

ZerionZerion is a decentralized finance (DeFi) platform and Web3 wallet that enables global crypto investors to manage, trade, and track their assets across multiple blockchain networks.

Unreal Engine, C++, Streaming solutions, Memory system, Physics (ChaosPhysics), World building tools, AAA title experience, Multithreaded programming, System architecture, Debugging and optimization

CD PROJEKT REDCD PROJEKT RED is a Warsaw-based video game developer specializing in story-driven RPGs, including The Witcher series and Cyberpunk 2077, operating primarily in the B2C gaming industry with a global target market.

Unreal Engine, C++, Streaming solutions, Memory system, Physics (ChaosPhysics), World building tools, Multithreaded programming, System architecture, Debugging and optimization

CD PROJEKT REDCD PROJEKT RED is a Warsaw-based video game developer specializing in story-driven RPGs, including The Witcher series and Cyberpunk 2077, operating primarily in the B2C gaming industry with a global target market.

6 years of experience, C#/.NET, C++, Unreal Engine, Multi-threaded architectures, Networking protocols, Database technologies, Networked applications, Network optimization

Python

5 years of experience, Strong Python, AI-assisted development, Healthcare experience, Flask, SQLAlchemy, PostgreSQL, Redis

CollectlyCollectly is a San Francisco-based B2B SaaS healthcare technology company specializing in AI-driven patient billing and revenue cycle management solutions for healthcare organizations.

RTL design, CPU architecture, Microarchitecture development, Power-saving techniques, High-speed processor design, Design verification, Synthesis and timing closure, Problem-solving skills

Rust

3 years of experience, Rust, Network services, Asynchronous code, Security-first mindset, Distributed systems, RPC protocols, Kafka, Event-Driven Systems, End-to-end ownership, Mentorship

KrakenKraken is a global fintech B2B and B2C cryptocurrency exchange platform, dedicated to accelerating crypto adoption and headquartered remotely with a presence in over 70 countries.

3 years of experience, Full-stack or backend proficiency, Custom integrations experience, Technical implementation ownership, Technical discovery sessions, C1+ English proficiency

PearlPearl is a dental AI company specializing in SaaS solutions for dental x-ray analysis, headquartered in an unspecified location, operating in the B2B healthtech industry with a global market presence.

TypeScript · React · Node.js

5 years of experience, React, TypeScript, Node.js, REST, GraphQL, MongoDB, CI/CD, iPaaS, AI coding tools, Healthcare integrations, Security awareness

Kubernetes

Kubernetes, Datacenter experience, Distributed systems, Go, Terraform, Crossplane, Cluster-API, Networking components management, Operating code

Grafana LabsGrafana Labs is a San Francisco-based B2B observability platform specializing in open-source IT systems monitoring and data visualization for enterprises globally.

Kubernetes

Kubernetes, Distributed systems, Datacenter experience, Go, Terraform, Crossplane, Cluster-API, Tinkerbell, Talos, Ceph, Networking management

Grafana LabsGrafana Labs is a San Francisco-based B2B observability platform specializing in open-source IT systems monitoring and data visualization for enterprises globally.

Go · AWS · Kubernetes

8 years of experience, Trust Accounting subsystem, Production-grade financial infrastructure, AWS, Kubernetes, CI/CD pipelines, Golang, Financial systems familiarity, Architectural design, Cross-team influence

HostawayHostaway is a USA-based B2B SaaS provider specializing in vacation rental management software, serving property managers with 2-5,000+ properties globally.

Kubernetes

Kubernetes management, Datacenter experience, Crossplane, Terraform, Go, Distributed systems, On-call rotation, Cluster networking management

Grafana LabsGrafana Labs is a San Francisco-based B2B observability platform specializing in open-source IT systems monitoring and data visualization for enterprises globally.

PHP

6 years of experience, PHP, Go, High-traffic systems, Decomposing monoliths, API design, AI coding tools, Cloud environment, Event-driven architecture

HostawayHostaway is a USA-based B2B SaaS provider specializing in vacation rental management software, serving property managers with 2-5,000+ properties globally.

Python · Kubernetes · Docker

7 years of experience, Bash, Python, CI/CD systems, Container image building, Docker, Podman, Kubernetes, Linux systems, Security compliance, Cloud-native compatibility, Open source project contributions

CanonicalCanonical is a London-based B2B open-source software company specializing in Ubuntu and providing commercial support services to global enterprises in sectors like cloud, IoT, and data science.

Java · Kotlin

7 years of experience, Kotlin, Java, Distributed systems, Cloud infrastructure, Platform engineering principles, CI/CD, Observability, AI tools, Web3 passion

OpenseaOpenSea is a Miami-based B2C NFT marketplace specializing in buying, selling, and trading digital assets across multiple blockchains, serving the global crypto collectibles and digital art markets.

Java · Kotlin

7 years of experience, JVM languages (Kotlin, Java), Distributed systems design, Cloud infrastructure, Platform engineering principles, AI tools and workflows, Web3 passion, CI/CD and observability

OpenSeaOpenSea is a leading NFT marketplace headquartered in either Miami or New York, specializing in B2C transactions of digital assets across multiple blockchains in the crypto/Web3 industry.

Python

3 years of experience, Compiler optimizations, MLIR, C/C++, Python, AI workload implementation, LLM inference, Compiler framework design

NVIDIANVIDIA Corporation is a Santa Clara-based technology company specializing in designing GPUs and AI solutions for gaming, professional visualization, and cloud services, operating in both B2B and B2C markets globally.

TypeScript · Node.js

Staff-level architectural ownership, Distributed systems depth, Data architecture at scale, Configurable systems at scale, TypeScript & Node.js depth, Cross-team technical leadership, Platform enablement mindset, Long-horizon engineering

n8nn8n is a Germany-based B2B SaaS workflow automation platform that integrates over 400 tools and services, targeting industries like IT and fintech with a focus on low-code and AI functionalities.

Kubernetes

Go, Distributed systems, Cloud-native microservices, High availability systems, Operational excellence, Kubernetes, CockroachDB, NATS JetStream, CI/CD pipelines, Test automation, End-to-end project ownership

Form3 (via Otta)Form3 is a London-based fintech B2B SaaS provider specializing in Payments-as-a-Service, offering cloud-native payment solutions for financial institutions and regulated fintechs in the UK.

Python · Kubernetes · Docker

5 years of experience, Python, Linux, Automated testing frameworks, Distributed systems, Kubernetes, Docker, AI-assisted coding tools

NVIDIANVIDIA Corporation is a Santa Clara-based technology company specializing in designing GPUs and AI solutions for gaming, professional visualization, and cloud services, operating in both B2B and B2C markets globally.

Python · AWS · Azure

8 years of experience, HPC and AI solution technologies, Job scheduling tools (Slurm, K8s), Linux networking (Redhat/CentOS, Ubuntu), Storage solutions (Lustre, GPFS, Weka.io), Python programming, Automation tools (Jenkins, Ansible), Networking Protocols (InfiniBand, Ethernet), Virtual systems (VMware, Hyper-V), Cloud computing platforms (AWS, Azure)

NVIDIANVIDIA Corporation is a Santa Clara-based technology company specializing in designing GPUs and AI solutions for gaming, professional visualization, and cloud services, operating in both B2B and B2C markets globally.

Python · Kubernetes

Kubernetes, Terraform, Datacenter experience, Distributed systems, Go, Python, Shell, On-call rotation, Crossplane, Cluster-API, Tinkerbell, Talos, Ceph

Grafana LabsGrafana Labs is a San Francisco-based B2B observability platform specializing in open-source IT systems monitoring and data visualization for enterprises globally.

Python

Python, Linux, AI-assisted development tools, System design, Technical product ownership, C language code review, End-to-end project ownership, Scalable architecture design

Java

5 years of experience, Java, Spring Boot, Asynchronous messaging, Microservices, Financial services understanding, Crypto experience, Design patterns knowledge, Product lifecycle experience

BVNKBVNK is a UK-based fintech B2B platform specializing in stablecoin payment infrastructure, enabling businesses to send, receive, and convert currencies globally.