Senior Full Stack Engineer

1. Role Overview

As a Senior Full-Stack you will be responsible for the continuous development, maintenance,

and technical enhancement of our modern sustainability platform. Leveraging a high-performance ecosystem built on .NET 8 and Next.js 15, you will drive the evolution of the

platform’s core features to ensure long-term scalability. Your role focuses on optimizing the

existing architecture, implementing robust new functionalities, and future-proof as it grows to meet global demands.

2. Technical Stack

Backend: .NET 8 (C#) using Clean/Hexagonal Architecture.

Frontend: React 19 / Next.js 15 (App Router).

Database: PostgreSQL 16 via AWS Aurora.

Infrastructure: AWS (ECS Fargate, RDS, ElastiCache, CloudFront, S3) in eu-west-2 (London).

IaC: Terraform Cloud and dbt Core.

Identity & Security: ZITADEL (OIDC/SAML 2.0).

Data Pipeline: Fivetran and Snowflake.

3. Key Requirements (Must-Have)

Modern Backend Engineering

5+ years of experience developing and maintaining web applications.

Ability to implement Clean Architecture patterns to ensure maintainability and testability.

Experience with PostgreSQL schema design and query optimization.

Experience with Entity Framework is a plus.

Experience with background job processing systems (Hangfire experience is a plus).

Frontend & Full-Stack Integration

Senior-level proficiency in React 19 and Next.js 15.

Deep understanding of TypeScript and state management using Tanstack Query.

Experience with internationalization (next-intl) for products supporting 15+ languages.Cloud Infrastructure & SRE

Operational experience with AWS ECS Fargate and networking components (ALB, WAF,

Route 53).

Advanced Terraform skills for managing Test, Staging, Demo, and Live environments.

Commitment to 99.5% availability and implementing graceful degradation.

4. Preferred Skills & Experience (Good to Have)

Experience in the development and maintenance of .NET 8 and C# based solutions in a

SaaS context.

Data Engineering: Experience with ETL processes via Fivetran and Snowflake

analytics.

Security: Implementation of MFA, TLS 1.3, and OWASP Top 10 mitigation strategies.

AI/ML: Familiarity with LLM-based "Knowledge Worker" tools and RESTful API

integration.

Integrations: Experience with ChargeBee (Billing), Stripe (Payments), and Salesforce

(CRM).

5. Responsibilities

Architect and develop the .NET-based core API and specialized Admin Application.

Implement robust Auditing systems for traceability of all user and admin actions.

Manage automated deployments via GitHub Actions and Terraform Cloud.

Ensure accessibility compliance to WCAG 2.1 AA standards.