Remote Software Engineering and Development jobs open to Spain.

AI-led engineering engagement, Backend engineering background, Experience managing engineers, Team building experience, System thinking, Customer engagement, Fluent English, Judgment and decision-making, Low ego

cargo.onecargo.one is a Berlin-based B2B SaaS platform specializing in air cargo management, offering tools for freight agents to streamline bookings and operations in the logistics industry.

Blockchain wallet experience, DeFi fluency, Experience managing engineers, Systems judgment, Experience integrating decentralized exchanges, Familiarity with Sui or Move, Experience leading products through growth

Mysten LabsMysten Labs is a Palo Alto-based Web3 infrastructure company specializing in the Sui Layer 1 blockchain platform, offering B2B solutions for gaming, DeFi, and NFT sectors globally.

GraphQL · Python · Rust

7 years of experience, Python, Go, Rust, Cloud platforms (AWS, Azure, GCP), Container technologies (Docker, Kubernetes), Agentic systems, SQL, Distributed systems design, Durable execution systems, Multi-tenant platform design, Third-party API integration, Database architectures (PostgreSQL, Neo4j), GraphQL backend development

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.

GraphQL

7 years of experience, Agentic systems, Durable execution engine, Multi-tenant platforms, Third-party API integration, Security control planes, PostgreSQL and Neo4j, GraphQL backends, Observability tooling, Prompt injection awareness

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 · Rust

Go, Kotlin, Rust, Python, SQL, Orchestration systems, Data lifecycle management, Schema evolution, Data correctness, Stateful stream processing, Distributed systems, AI tools proficiency, Clear written communication

Python

Python/Django, CI/CD systems, Automated testing workflows, Observability practices, Internal tools/platforms, Engineering standards, Debugging complex issues, Technical writing, Iterative development, Collaboration in distributed teams

MozillaMozilla is a Mountain View, California-based non-profit organization that develops open-source software, including the privacy-focused Firefox browser and Thunderbird email client, targeting global consumers.

Rust

7 years of experience, Rust, Distributed systems, Security-first mindset, Network services, Asynchronous code, End-to-end ownership, Building and scaling shared systems, Debugging across the stack

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.

Python · GCP · Kubernetes

C++, Python, Game engine development, Cross-platform development, Performance-critical software, Game editor extension systems, Cloud technologies (GCP, Docker, k8s), Observability tools (Sentry, Grafana), Facilitating workshops, Technical presentations

Python · Kubernetes · Docker

C++, CI automation (Gitlab), Python, Cross-platform environments, Build systems (MSBuild, gcc/make, xcode), VCS systems (svn, git), Unix/Linux systems, Docker/K8s, Technical writing

GCP · Kubernetes

Go, Kubernetes, Large-scale backend development, Microservices architecture, Performance analysis, Security product architecture, GCP services, Distributed systems optimization, API integration with SaaS applications

CyberhavenCyberhaven is a remote-based B2B cybersecurity company specializing in AI-powered data protection and advanced threat detection for organizations globally.

Rust

Rust, Interactive data visualization, Real-time applications, UI skills, Comfort with ambiguity, Great communication skills

RerunRerun is a Stockholm-based B2B open source data platform specializing in Physical AI, providing an SDK for logging and visualizing multimodal data streams.

SQL

Database performance optimization, Strong SQL, Backend engineering, Data architecture design, Lakehouse experience, Schema design for semi-structured data, Streaming ingestion experience, Migration or re-architecture track record

OscilarOscilar is a US-based fintech B2B SaaS provider specializing in AI-native risk decisioning for fraud prevention, credit underwriting, and AML compliance, serving banks and digital organizations.

Python · Java · AWS

10 years of experience, Cloud architecture, Microservices, Distributed systems, API design, Python, Java, C#, C++, AWS, Azure, GCP, Docker, Kubernetes, Data modeling, Infrastructure as code, Regulatory compliance, Technical leadership

Janea SystemsJanea Systems is a Seattle-based B2B consultancy specializing in expert software engineering solutions, focusing on AI and cloud technologies for enterprise clients globally.

AWS · Azure · GCP

AWS, Azure, GCP, Terraform, Docker, Kubernetes, Networking, TLS management, IAM, Client onboarding, Bioinformatics experience, AI fluency

SeqeraSeqera Labs is a Barcelona-based bioinformatics B2B company specializing in scalable data pipeline technologies for the life sciences industry.

AI feature shipping, Production software operation, Product conversation skills, Remote work autonomy, DevTools experience

ChecklyCheckly is a remote-first B2B SaaS platform specializing in application reliability, offering testing, monitoring, and observability solutions for engineering teams globally.

AWS · Kubernetes · Docker

Kubernetes in production, AWS at meaningful scale, Hands-on AI building, Solid o11y practices, Infrastructure as code with Terraform, CI/CD systems, Docker, Running a reliability practice, People leadership in SRE, Coaching craft and soft skills, Conflict resolution, Hiring engineers, Understanding regulated environments

Remote - Referral BoardRemote Referral Board Inc. is a fully remote HR technology company providing a SaaS platform for employee referral programs tailored to distributed teams, targeting global businesses in need of efficient hiring solutions.

AWS · Kubernetes

SRE team leadership, Kubernetes in production, AWS at scale, AI infrastructure scaling, Incident response, SLOs and error budgets, Infrastructure as code with Terraform, CI/CD systems, Observability practices, Conflict resolution in teams

RemoteRemote is a global HR tech B2B SaaS platform headquartered remotely, specializing in payroll, compliance, and employment management for businesses hiring international teams.

JavaScript · Python · GCP

5 years of experience, Cloud-native technologies (GCP preferred), Kubernetes, ArgoCD, Terraform, GitHub, Python, JavaScript, Go, Technical leadership, Internal Developer Platforms, Cost optimization

MozillaMozilla is a Mountain View, California-based non-profit organization that develops open-source software, including the privacy-focused Firefox browser and Thunderbird email client, targeting global consumers.

TypeScript · React · Python

Python, Typescript, React, API design, Platform reliability, ML/GenAI exposure

ElevenLabsElevenLabs is a Poland-based AI voice technology company specializing in advanced speech synthesis and audio solutions for a global market, operating in both B2B and B2C contexts.

Unity, Scalable architectures, Rapid prototyping, Optimisation, Live iteration workflows, Integrating new technologies, Passion for strategy games

MythwrightMythwright is a B2C video game publisher specializing in indie games across niche genres, operating primarily on Steam with no physical headquarters.

Python

UVM testbenches, SystemVerilog, IP-level ASIC verification, Debugging RTL, Python, AI-assisted workflows, Networking processor architectures, Data-driven analytics, Automation solutions, Scripting languages

Java

10 years of experience, Mobile development, Managing teams of 25+ engineers, Change management, Engineering excellence, Game development experience, C++/C#/Java/Scala expertise, High-load product experience, Game engine architecture understanding

PlayrixPlayrix is a Dublin-based mobile game developer specializing in free-to-play casual puzzle and city-building games, with a global reach and a B2C business model.

Swift

5 years of experience, Deep Swift, SwiftUI, UIKit, Combine, Startup experience, AI workflows, Attention to detail, Feature success perspective

OpalOpal is a US-based B2C mobile app focused on personal productivity and digital wellness, helping users track screen time and enhance focus, particularly for the ADHD community.

Kubernetes

7 years of experience, Generative AI, NVIDIA GPU architectures, High-performance computing, Large-scale AI/ML training, Distributed systems, CUDA-X libraries, NeMo frameworks, TensorRT, Model architecture optimization, Cloud Native technologies, Kubernetes, Large language models, Influencing senior leadership, Technical advocacy for NVIDIA systems

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.

3 years of experience, Metal, DX11, DX12, C++, Objective-C, GPU profiling tools, multithreading, console SDKs, XCode, CPU profiling tools

Azure

5 years of experience, Microsoft Azure, Azure DevOps, Enterprise networking, GitOps, Infrastructure-as-Code, CI/CD pipelines, Containerized architectures

Aequilibrium Software Inc.Aequilibrium Software Inc. is a Vancouver-based B2B technology consulting firm specializing in custom software solutions for FinTech and Immersive Learning, supporting digital transformation for businesses globally.

Python · SQL · AWS

5 years of experience, Production Python, AWS, Linux fundamentals, Practical SQL, Infrastructure as Code, Advanced coding-agent workflows, Autonomous delivery, English B2 or higher

Kubernetes

Linux systems administration, Kubernetes in production, Infrastructure as code (Ansible, Terraform), GitLab administration, Prometheus and Grafana, Technical writing for engineers, Strong communication skills, Advanced use of AI engineering assistants

5 years of experience, Vulkan, Metal, C++, real-time rendering, shader optimization, GPU performance profiling, mobile GPU architecture, Unity SRP, compute-based rendering techniques

ScopelyScopely is a Culver City-based global interactive entertainment company specializing in mobile-first free-to-play video games, operating primarily in the B2C sector with a strong presence in the mobile gaming industry.

Go · GCP · Kubernetes

Golang, Architectural vision, Distributed microservices, Domain-Driven Design (DDD), High-scale distributed databases, Google Cloud Platform (GCP), Kubernetes, Mentorship