Role Description

We are looking for the very Top Talent…and we would be delighted if you were to join our team!

More in details, UST is a multinational company based in North America, certified as a Top Employer company with over 35.000 employees all over the world and presence in more than 30 countries. We are leaders on digital technology services, and we provide large-scale technologic solutions to big companies.

What are we looking for?

We are looking for a Senior AWS Application Developer with strong AWS and software engineering expertise, experience building cloud-native solutions, and an AI-first mindset. The ideal candidate enjoys creating scalable platforms, developer tooling, and best-practice frameworks that enable engineering teams to build.

Position 100% remote for candidates based in Spain.

Essential

What we're looking for

- Strong application-development experience, enough real-world app-dev depth to define how applications should be built well, and to encode that as patterns and quick starts others rely on. This is the core of the role.
- Strong AWS application development and software engineering experience, ideally on developer tooling, delivery platforms, or cloud-native developer workflows.
- You already use AI daily for engineering work. You build with a coding harness/agent as a matter of course, and the more experience you have driving one, the closer to spec-driven development, the better. This is central to how we work, not a bonus.

- Solid knowledge of AWS serverless and event-driven services:
- Lambda
- API Gateway
- Step Functions
- Integration patterns across AWS services

- Experience automating CI/CD, SDLC, and engineering controls:

- GitHub Actions
- Infrastructure as Code
- Automated evidence capture





- Experience building automated governance, compliance, or operational controls into delivery pipelines, turning policy and regulatory requirements into code and evidence.
- Comfortable implementing both:

- Deterministic scripted checks
- Agentic applications that reason over the problem

- Financial services or regulated-industry experience is a plus.
- Good engineering practice as second nature:

- API design
- Automated testing
- Observability
- Documentation
- Secure-by-default delivery

- Comfortable operating independently in a fast-moving programme and contributing from early on.

Nice to have

- Python/FastAPI for building production APIs and services.
- TypeScript/React for web front ends and developer consoles.
- Experience building internal developer platforms or "platform-as-a-product."
- Experience building agentic applications, or designing APIs/CLIs and reusable skills for both human and agent consumers.
- You don't need to have built agentic apps, but experience working through a harness matters.

What You'll Be Like

- A hands-on engineer with a builder's mindset, happy close to the code, shipping practical capability.
- Fluent with AI-assisted engineering. You reach for a harness by default and think in terms of specs and outcomes.
- Opinionated about good application development, and able to turn that judgement into patterns others can follow.
- Pragmatic and self-sufficient,



able to make progress where priorities shift as the platform is proven with real users.
- Product-minded and customer-focused, genuinely interested in making the paved road useful.
- Security- and automation-conscious. You build controls and quality in, rather than leaning on manual process.
- Clear and collaborative across platform, application, security, identity, and service-management stakeholders.

What can we offer?

- 23 days of Annual Leave plus the 24th and 31st of December as discretionary days!
- Numerous benefits (Health Care Plan, teleworking compensation, Life and Accident Insurances).
- `Retribución Versátil´ Program: (Meals, Kinder Garden, Transport, online English lessons, Health Care Plan…)
- Free access to several training platforms
- Professional stability and career plans
- UST also, compensates referrals from which you could benefit when you refer professionals.
- The option to pick between 12 or 14 payments along the year.
- Real Work Life Balance measures (flexibility, WFH or remote work policy, compacted hours during summertime…)
- UST Club Platform discounts and gym Access discounts

If you would like to know more, don’t hesitate to apply and we’ll get in touch to fill you in detail.

We are waiting for you!

In UST we are committed to equal opportunities in our selection processes and do not discriminate based on race, gender, disability, age, religion, sexual orientation or nationality. We have a special commitment to Disability & Inclusion, so we are interested in hiring people with disability certificate.

Skills AWS, AWS Lambda, AWS Step Functions, Agentic AI, Axway, CI/CD, CLI, FastAPI, Event-Driven Architecture

📌 Senior AWS Application Developer | 100% Remote (Madrid)
🏢 Ust
📍 Madrid