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Donnes

Senior Software Engineer – Backend

Donnes

. Design, develop, and enhance APIs, backend services, and integrations, primarily using C# and Python .

Posted 9/15/2026full-timeCuritiba • BrazilSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in backend development, API design, and microservices architecture, with a strong focus on AWS serverless solutions and automated testing practices. Capable of leading technical initiatives and translating business needs into scalable, resilient systems.

Highest-signal resume keywords
C# DevelopmentPython DevelopmentAWS LambdaMicroservices ArchitectureAutomated Testing

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Backend DevelopmentAPI DesignSoftware EngineeringRelational DatabasesNoSQL DatabasesDockerInfrastructure as CodeEvent-Driven ArchitectureGenerative AISystem Modernization
Soft Skills
Technical AutonomyCollaborationProblem-SolvingKnowledge SharingLeadership
Tools & Technologies
TerraformKubernetesCI/CDDevSecOpsObservability Tools
Industry Keywords
BankingFintechRegulated Financial EnvironmentsHigh Transaction VolumesLegacy Systems

Tech Stack

Tools & technologies
AWSDockerKubernetesNoSQLPythonTerraform

About the role

Key responsibilities & impact
  • Design, develop, and enhance APIs, backend services, and integrations, primarily using C# and Python
  • Participate in architectural decisions, building scalable, resilient, secure, and sustainable solutions
  • Contribute to the evolution of a microservices architecture and serverless services on AWS, with extensive use of AWS Lambda
  • Contribute to system modernization and the platform’s technical evolution
  • Investigate and resolve performance, availability, scalability, and reliability challenges in critical systems
  • Ensure engineering quality through automated testing, code reviews, observability, and sound development practices
  • Work closely with Product, Engineering, and business teams to translate business problems and needs into technical solutions
  • Lead initiatives autonomously, overseeing solutions from technical design through production operations
  • Share knowledge and contribute to the team’s technical growth through architecture discussions, code reviews, and pair programming
  • Participate, when applicable, in building solutions that use Artificial Intelligence and LLMs

Requirements

What you’ll need
  • Strong experience in backend development and software engineering, working with production systems
  • Experience with C# and Python
  • Experience building APIs, microservices, and system integrations
  • Solid knowledge of software architecture, design patterns, and distributed systems
  • Experience with AWS, preferably with serverless services such as AWS Lambda
  • Experience with relational and/or NoSQL databases
  • Hands-on experience with Docker and containerized applications
  • Knowledge of automated testing and software quality practices
  • Knowledge of observability, including logs, metrics, tracing, and monitoring
  • Knowledge of Infrastructure as Code (IaC), using Terraform, Terragrunt, or similar tools
  • Technical autonomy and the ability to understand business problems, make decisions, and lead end-to-end solutions
  • Experience in banking, fintech, credit, or other regulated financial environments
  • Experience with highly available systems and high transaction volumes
  • Experience with messaging, asynchronous processing, and event-driven architectures
  • Knowledge of Kubernetes, CI/CD, application security, and DevSecOps practices
  • Experience modernizing legacy systems
  • Practical experience with generative AI and LLMs, including API-based integration
  • Knowledge of RAG, embeddings, semantic search, vector databases, or frameworks such as LangChain, LlamaIndex, and similar tools

Benefits

Comp & perks
  • Meal Allowance
  • Food Allowance
  • Transportation Allowance
  • Health Insurance, with no monthly premium deduction or copayments for you and your dependents
  • Pharmacy Benefit
  • Dental Plan, with various plan and coverage options
  • Wellhub
  • Profit-Sharing and Results-Based Bonus (PLR)
  • Benefits Club, with partnerships with restaurants, gyms, universities, language schools, and other services
  • Employee Referral Program with rewards
  • Continuous learning environment
  • Feedback and one-on-one culture
  • Performance Reviews and Individual Development Plan (IDP)