Senior AWS Application Developer | 100% Remote

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

• 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 Flexible´ 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

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., provider of digital technology and transformation, information technology and services