Senior Python Software Engineer

Excelia; Castilla y León; A distancia; EUR 50.000 - 70.000; Jornada completa

Descripción de la vacante

A leading tech company in Spain is looking for a Senior Software Engineer to build scalable web applications using Lit and TypeScript. You will collaborate closely with teams to optimize performance and ensure high code quality. Ideal candidates should have over 6 years of experience in both frontend and backend development, proficient in Python and TypeScript. Join a dynamic culture that promotes innovation and offers remote-friendly policies.

Servicios

Flexible working hours

Focus on mental health and well-being

Ongoing professional growth opportunities

Formación

• 6+ years in frontend and backend development.
• Proficiency in TypeScript, Python, Lit, and Flask or FastAPI.
• Experience with Web Components, Strapi, Docker, Git, and CI/CD pipelines.

Responsabilidades

• Build and maintain scalable, modular UI components using Lit.Js and TypeScript.
• Work closely with designers, developers, and product managers to deliver responsive, high-performing web applications.
• Optimize application performance using Lighthouse, DevTools, and best practices for Core Web Vitals.

Conocimientos

TypeScript

Python

Lit

Flask

FastAPI

Web Components

Docker

Git

CI/CD pipelines

Debugging skills

Descripción del empleo

Senior Software Engineer (Python, Typescript And Lit)

47001 Valladolid, Castile and Leon Babel Profiles

Our client is a leading global platform for legal research and intelligence. They provide seamless access to one of the most comprehensive collections of legal information in the world - including case law, statutes, regulations, and expert commentary. By combining deep legal knowledge with the power of artificial intelligence and advanced analytics, helps legal professionals make faster, more informed decisions.

As part of the team, you’ll help shape the future of legal tech, collaborating with a passionate and diverse group of experts. This is your chance to work on impactful technology that empowers law firms, universities, corporations, and governments around the world.

Ready to be part of something meaningful? Let’s build the future of legal intelligence

Main responsibilities

• Build and maintain scalable, modular UI components using Lit.Js and TypeScript
• Work closely with designers, developers, and product managers to deliver responsive, high-performing web applications
• Optimize application performance using Lighthouse, DevTools, and best practices for Core Web Vitals
• Integrate front-end applications with headless CMS platforms (e.G., Strapi) and backend services
• Maintain high code quality through unit testing, code reviews, and adherence to best practices
• Identify and troubleshoot frontend and backend issues in collaboration with QA engineers and cross-functional stakeholders

Core skills/experience

• 6+ years in frontend and backend development
• Proficiency in TypeScript, Python, Lit, and Flask or FastAPI
• Experience with Web Components, Strapi, Docker, Git, and CI/CD pipelines
• Familiar with Core Web Vitals, Lighthouse, DevTools, and Unix systems
• Strong debugging, testing, and performance optimization skills
• Nice to have: React, Next.Js, SSR, or SSG and background in legal or regulatory tech

What's on offer

• A dynamic, collaborative culture that encourages innovation
• Flexible working hours and remote-friendly policies
• Focus on mental health and holistic well-being
• Ongoing professional growth and development opportunities
• Diverse, multicultural teams
• A space where creativity and experimentation are welcomed
• Regular team-building activities and community engagement
• Access to cutting-edge legal technology platforms and tools

Our recruitment process?

• Step 1: Interview with one of our recruiter
• Step 2: Interview with Hiring Manager
• Step 3: Interview with the Director

Project Manager - Embeded Software Development for Powertrain systems (Matlab/Simulink)

Valladolid, Castile and Leon Bertrandt Group

Tu rol:

Tareas:

• Experiencia con pruebas MiL (Model in the loop)

We are BERTRANDT, and you?

47001 Valladolid, Castile and Leon Ayesa

Skills clave:

• Pyspark
• Databricks

Developer Back (Python)

47001 Valladolid, Castile and Leon BBVA Technology en Europa

Senior Software Engineer - Remote

47001 Valladolid, Castile and Leon Hays

About Walkway is on a mission to revolutionize the tours and activities industry with AI-driven revenue intelligence. We empower operators with data-rich insights, competitive benchmarking, and dynamic pricing solutions to help them stay ahead in a rapidly evolving travel landscape. As a Senior Software Engineer, you’ll play a pivotal role in building and enhancing our data-intensive SaaS platform, delivering real-time analytics, automated pricing recommendations, and seamless user experiences.

About the Role

Please note that we’re a US-based company, so this position will be under a contractor agreement.

We’re hiring a Senior Software Engineer with a strong backend focus who can still navigate the full stack when needed. You’ll own core services (pricing, data ingestion, auth/permissions), shape our architecture, and partner with the founders on roadmap and trade-offs. This role is ideal for a self-starter who enjoys moving from design → code → production and can lead by example.

Beyond coding, you’ll drive engineering initiatives, collaborate with co-founders, product and data teams, and support other developers. You’ll ensure our application remains performant and scalable as we handle large data sets, complex filtering logic, and real-time updates for customers.

What You’ll Do

• Design and implement services in Node.Js/NestJS (TypeScript) running on GCP (Cloud Run, Cloud SQL/Postgres, Pub/Sub, Cloud Storage, VPC).
• Build and evolve multi-tenant SaaS primitives: RBAC, org/workspace models, JWT/OAuth auth flows, API keys, rate-limiting.
• Ship reliable REST (and/or GraphQL) APIs with versioning, pagination, idempotency, and strong contracts.
• Build background workers & schedulers for pricing jobs, data ingestion, and sync tasks (Pub/Sub/queues, cron).
• Performance engineering: caching strategies (e.G., Redis), query optimization, profiling, hot-path tuning.
• Observability: metrics, tracing, structured logs (OpenTelemetry, Cloud Logging/Monitoring, Sentry).
• Secure by default: least-privilege IAM, secrets management, encryption in transit/at rest, audit trails, PII handling, SOC2-friendly habits.

Data & Integrations

• Integrate with OTA/partner APIs; design resilient adapters, retries, backoff, and data quality checks.
• Model data for analytics workloads; collaborate with data science on the pricing engine and evaluation loops.
• Co-drive the roadmap and architecture decisions (domain boundaries, service decomposition, buy vs build).
• Set engineering standards, review PRs, mentor teammates, and unblock delivery.
• Balance velocity with reliability, cost, and long-term maintainability.

Performance and Scalability

• Optimize data-fetching flows and caching strategies to minimize latency and network overhead.
• Identify bottlenecks in frontend or backend, propose architectural improvements, and ensure smooth scaling under high traffic.
• Collaborate with DevOps/Infrastructure teams for CI/CD, monitoring, and alerting setups; potentially work with Google Cloud, AWS, or Vercel.
• Lead engineering initiatives — work with the CTO and other senior engineers to define technical direction.
• Mentor other developers, conduct code reviews, and promote best practices in clean, testable code.
• Break down product requirements or complex technical tasks into achievable sprints, providing accurate estimates.

Frontend touchpoints (as needed)

• Contribute to Next.Js/React endpoints/components when integration or contract changes require it.

Our stack (you don't need all of it)

• TypeScript, Node.Js, NestJS
• Next.Js/React (for UI)
• Terraform (nice to have), GitHub Actions, Sentry, OpenTelemetry

Requirements

• 6+ years building production software; at least 3+ years leading/owning backend services.
• Expert in Node.Js/TypeScript and a framework such as NestJS; strong SQL and Postgres fundamentals (modeling, indexing, migrations, locks, performance).
• Hands-on GCP experience (or AWS/Azure with willingness to adopt GCP).
• Proven SaaS chops: RBAC, JWT/OAuth, API design, multi-tenancy, background jobs, rate limiting, feature flags, A/B testing.
• Security & reliability mindset: secrets management, least-privilege IAM, auditability, SLO/SLI thinking.
• Comfortable with CI/CD, Docker, and production debugging/observability.
• Clear communicator who enjoys owning problems end-to-end and participating in roadmap/architecture.

Nice to have

• Experience with pricing/revenue systems or marketplace dynamics.
• Data/ML adjacent experience (evaluation pipelines, offline/online experimentation).
• Experience with data stores beyond Postgres (BigQuery, DuckDB, Elasticsearch).
• Terraform/IaC, Kubernetes, or cost-optimization on GCP.

Why Join Walkway

• the Future of Travel: Influence architecture decisions on a high-impact, AI-driven SaaS platform (we recently won an Award!)
• Collaborative Culture: Work in a supportive, innovative environment that values continuous learning and open communication
• Growth & Ownership: As a senior engineer, you’ll have the autonomy to guide projects from concept to production.

If you’re based in Europe, North America, or Latin America, don’t hesitate to reach out!

Senior Java Software Engineer

47001 Valladolid, Castile and Leon Coforge

Location: Remote (person must be based in Spain, Poland or Portugal)

Role Type: Permanent

Requirement: Must be based in Spain, Portugal or Poland

Experience: 10+ years |

47001 Valladolid, Castile and Leon Morson Edge (Technology)

Location: Remote (anywhere in Spain)

Employment Type: Full-time

About the Role

We are seeking a Senior Product Engineer to help build advanced tools and platforms that empower designers and developers to create exceptional digital experiences. You’ll work on a React-based design and code ecosystem — including the core editor, canvas, plugins, and CMS — driving innovation and enabling users to design with speed, precision, and collaboration.

Key Responsibilities

• Design, build, and enhance features across the core editor, plugins, and CMS.
• Translate product concepts and user needs into high-quality, scalable solutions.
• Collaborate closely with engineers, designers, and product teams to solve complex challenges.
• Mentor and support junior engineers to foster technical growth and best practices.
• Deliver impactful, maintainable solutions while ensuring work‑life balance.

Qualifications

• 7+ years of professional software engineering experience.
• Hands‑on experience with full‑stack development (Node.Js, Go, or similar).
• Solid understanding of automated testing, CI/CD pipelines, and quality assurance.
• Strong problem‑solving and communication skills.

Preferred Experience (Bonus Points)

What’s on Offer

• Fully remote and flexible working environment.
• Access to modern tools, technologies, and professional development resources.
• Inclusive and collaborative culture that values innovation and growth.
• Competitive compensation and equity participation opportunities.
• Team retreats and growth budgets to support ongoing learning.

Senior C++ Software Engineer (Gameplay)

47001 Valladolid, Castile and Leon Playrix

Senior Java Software Engineer - Remoto

47001 Valladolid, Castile and Leon Apiux Tech

• Spring MVC
• Spring Boot