Senior Software Engineer (.NET + TypeScript)

The company and our mission: Zartis is a global AI transformation and technology consulting partner where talented engineers and technologists work on cutting edge innovation. We partner with ambitious organizations to design, build, and scale technology solutions that deliver real impact. Our teams bring deep expertise in AI driven platforms, secure API architectures, and cloud native engineering. You will work on meaningful projects that accelerate the adoption of advanced technologies, from strategy and discovery through to full product delivery, helping turn complex challenges into measurable outcomes. With engineering hubs across EMEA and LATAM, and long term partnerships in financial services, healthcare and life sciences, and energy and climate, we offer opportunities to work on projects that truly matter. Here, you will not just build technology, you will drive business impact and grow your career alongside industry leaders. We are looking for a Senior Software Engineer to join a project in the environmental health sector, working with a leading provider of technology for the efficient collection of recyclable materials and general waste management. The project: Our teammates are talented people that come from a variety of backgrounds. We’re committed to building an inclusive culture based on trust and innovation. You will be part of a distributed team developing new technologies to solve real business problems. Our client builds intelligent digital solutions to simplify the distribution of complex resources and streamline challenging logistics in waste, recycling, complex logistics, and utility operations. We are looking for someone with strong communication skills, who is proactive, comfortable taking ownership, and experienced in building scalable systems in a fast-paced environment, with a strong attention to detail and a production-focused mindset. What you will do: Build and maintain scalable backend services using C# and .NET Core, following Clean Architecture principles and RESTful API design. Develop and integrate APIs supporting payment systems, including card tokenisation and payment method management. Contribute to frontend development using Angular and TypeScript, building UI components within an Nx monorepo structure. Work within a cloud-native, containerised architecture on Azure, utilising Docker, Kubernetes, and ArgoCD for deployments. Participate in a spec-first, test-driven development process using xUnit, Vitest, and Playwright, with strict architectural standards enforced through automated code review. Collaborate with architecture teams to align with platform strategy, contributing to a greenfield-to-production SaaS product with active development. Support observability and reliability across production systems using OpenTelemetry and Grafana for distributed tracing and metrics. Engage with CI/CD pipelines built on Azure Pipelines, including SonarQube analysis, Trivy security scanning, and automated test gates. Contribute to frontend development using Angular and TypeScript, building UI components within an Nx monorepo structure. What you will bring: 6+ years of experience in software development. Strong experience with C# and .NET Core, including Clean Architecture, EF Core, and REST API design. Strong understanding of multi-tenancy patterns and building scalable, production-ready SaaS applications. Hands-on experience with cloud-native development on Microsoft Azure, including Docker and Kubernetes. Experience with TypeScript, and ideally Angular (v17+) and Nx monorepo architecture. Experience integrating with OAuth2/OIDC flows and identity providers such as Auth0. Familiarity with Azure services including Azure Key Vault, Azure Container Registry, and Azure Pipelines. Solid knowledge of software engineering principles (SOLID, Clean Architecture, DI) and testing practices. Experience working in Agile environments with a structured, spec-first development approach. Strong problem-solving skills and the ability to work independently within a distributed team. Nice to have: Familiarity with PostgreSQL and Entity Framework Core. Experience with OpenTelemetry, Grafana, or similar observability tooling. Background in payments, financial systems, or multi-tenant SaaS products. What we offer: 100% Remote Work 3 months collaboration with the possibility of extension. WFH allowance: Monthly payment as financial support for remote working. Career Growth: We have established a career development program accessible for all employees with a 360º feedback that will help us to guide you in your career progression. Training: For Tech training at Zartis, you have time allocated during the week at your disposal. You can request from a variety of options, such as online courses (from Pluralsight and Educative.io, for example), English classes, books, conferences, and events. Mentoring Program: You can become a mentor in Zartis or you can receive mentorship, or both. Zartis Wellbeing Hub (Kara Connect) : A platform that provides sessions with a range of specialists, including mental health professionals, nutritionists, physiotherapists, fitness coaches, and webinars with such professionals as well. Multicultural working environment: We organize tech events, webinars, parties, and activities to do online team-building games and contests.