Senior Back End Engineer

Software Mind

. Design and implement backend microservices following clean architecture principles .

Posted 10/14/2026full-timeRemote • Costa RicaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and implementing backend microservices using C# and .NET, with a strong focus on clean architecture principles and event-driven architectures. Proficient in building REST and GraphQL APIs, managing CI/CD pipelines, and mentoring engineers on effective software development practices.

Highest-signal resume keywords

C# / .NET DevelopmentMicroservices ArchitectureREST and GraphQL API DesignEvent-Driven ArchitectureCI/CD Pipeline Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

MicroservicesREST APIsGraphQL APIsNoSQL DatabasesRelational DatabasesAutomated TestingJWT AuthenticationEvent-Driven FlowsData ModelingAgile Methodologies

Soft Skills

Strong Communication SkillsMentoringCollaboration

Tools & Technologies

AWS ECSAWS SQSAWS SNSDockerKeycloakASP.NET CoreMediatRXUnitFluentValidationCI/CD Tools

Industry Keywords

E-CommerceOrder ManagementTransactional Domains

Tech Stack

Tools & technologies

ASP.NETAWSAzureCloudDockerGraphQLMicroservicesNoSQL.NET

About the role

Key responsibilities & impact

Design and implement backend microservices following clean architecture principles
Build and maintain REST and/or GraphQL APIs, defining consistent data contracts and request/response models
Implement and consume event-driven flows across message queues, including webhook handling, retry logic, and error handling
Design data models and implement persistence logic against NoSQL and/or relational databases
Implement JWT-based authentication and authorization flows with identity providers such as Keycloak or equivalent services
Write unit, integration, and BDD-style tests and maintain test coverage
Build and maintain CI/CD pipelines for build, test, and cloud deployment
Deploy containerized services on managed platforms such as AWS ECS
Participate in code reviews and uphold engineering standards
Mentor less experienced developers and engineers on effective AI coding-tool workflows
Collaborate with architects, QA, and developers to resolve integration gaps and deliver features across multiple services within sprint timelines

Requirements

What you’ll need

5+ years of professional software development experience building backend services with C# / .NET
Demonstrated experience designing and building microservices, including REST and/or GraphQL APIs
Solid understanding of clean architecture or similarly layered design patterns, with clear separation between domain, application, and infrastructure concerns
Experience with NoSQL and/or relational databases, including schema and data modeling and query optimization
Practical experience with event-driven architectures and message queues, such as AWS SQS/SNS or an equivalent service
Experience writing automated tests (unit, integration, and/or BDD) and integrating them into a CI/CD pipeline
Comfortable working in an agile team environment, prioritizing pragmatically under sprint deadlines
Strong written and verbal communication skills, comfortable flagging blockers, gaps, and risks early and directly
Experience with disciplined AI-assisted software development practices, including specification-driven development, TDD, and iterative refactoring
Able to mentor engineers on using AI coding tools effectively within structured development workflows
Preferred: Backend experience with ASP.NET Core and related tooling, such as MediatR/CQRS, xUnit, Reqnroll/BDD, and FluentValidation
Preferred: AWS experience, including ECS, SQS, SNS, or similar managed container/queue services
Preferred: Experience with Docker and containerized deployments
Preferred: Experience in e-commerce, order management, or similarly transactional domains
Preferred: Familiarity with identity providers such as Keycloak or Azure AD
Preferred: Experience integrating third-party platforms via webhooks, such as storefront platforms or payment providers
Employees can work remotely
Applications accepted from LATAM countries

Benefits

Comp & perks

Educational resources
Flexible schedule
Work From Anywhere
Referral Program
Supportive and chill atmosphere