Senior Front-End Engineer with Focus on Test Automation
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ASP.Net Lead Architect / Sr. Developer
02/10/2025
Programming & Tech
Full time
Remote (Brazil)
Senior level
3200 to 5600 USD
About the Role Company is seeking a highly experienced ASP.NET Lead Architect / Senior Developer to join our team. This role is ideal for a deeply technical professional with proven experience in designing, optimizing, and maintaining high-performance systems within the .NET 5 and Azure ecosystem. You will play a critical role in ensuring scalability, cost efficiency, and top-tier performance of our technology stack while leading the development of new features and delivering timely bug fixes. This is a highly technical role, requiring advanced problem-solving skills, attention to detail, and the ability to mentor and guide peers in best practices. Responsibilities Architecture & Optimization Revamp and fine-tune our ASP.NET web application stack for performance, cost effectiveness, and scalability. Design and optimize high-performance API services, proxy technologies, and multi-tenant database infrastructures. Development Build new features across backend, web, and mobile applications. Ensure clean, maintainable, and scalable code with strong adherence to standards. Support legacy Xamarin components where necessary. Maintenance & Operations Quickly troubleshoot and fix bugs. Oversee CI/CD pipelines to ensure smooth deployments. Work with monitoring and observability tools to maintain system health. Collaboration Collaborate closely with cross-functional teams (product, QA, DevOps). Communicate clearly in English (spoken and written) with stakeholders across geographies. Handle “overly confident developers” tactfully, ensuring technical transparency and simplicity. Tech Stack Programming Languages C# / .NET 5 / ASP.NET Core – Core backend services, API layer, and daemon services TypeScript + Angular – Shopify embedded apps, admin portal, CRM features React Native (JavaScript/TypeScript) – Mobile apps (iOS/Android, offline capabilities) Liquid – Shopify storefront & embedded UI integration XML – Domain modeling + code generation workflows SQL (T-SQL) – Azure SQL Server (master + tenant databases) NoSQL (CosmosDB / MongoDB API) – Operational data, caching, and sync storage Frameworks & Libraries .NET 5 – Services and APIs Xamarin.Forms – Legacy mobile components Entity Framework Core – ORM for SQL backends Mermaid – C4 diagrams (context/container/component) Custom XML CodeGen Tools – Auto-generating scaffolding Platforms & Infrastructure Azure Cloud – Core hosting environment Azure SQL Database – Master + tenant-sharded stores Azure CosmosDB – JSON/NoSQL operational store Azure Blob Storage – File storage (documents, exports, results) Azure Service Bus – Messaging, event routing, background jobs Shopify – E-commerce storefront + embedded integration SendGrid – Transactional/notification emails Klaviyo – Marketing automation and campaigns Calendly – Scheduling integration USPS API – Label generation, shipping automation Twilio – SMS messaging and alerts Observability & Ops Logging/Tracing – Azure Monitor + custom observability layer Metrics – Prometheus-style metrics capture integrated with .NET services Backup/Restore – Azure SQL backups + Mongo dump strategies CI/CD – Git-based pipelines with automated deployments Required Qualifications 15+ years of professional development experience in complex systems. Deep expertise in ASP.NET Core, .NET 5, and Azure. Strong understanding of multi-tenant architectures, performance optimization, and cost-effective scaling. Demonstrated ability to lead technical initiatives and mentor other developers. Advanced English (spoken and written): capable of leading meetings, writing documentation, and engaging in negotiations. Proven track record of delivering high-quality, scalable systems. Soft Skills Trustworthy, respectful, and honest. Hardworking and committed to delivery. High attention to detail. Collaborative, not difficult to work with, and effective in managing differing personalities within the team. Interview Process 2–3 interview stages, including technical and behavioral assessments. Final decision made by Company’s senior leadership in coordination with the hiring manager.
QA engineer
24/09/2025
Programming & Tech
Full time
Remote (Colombia)
Entry level
960 to 1120 USD
Remote: Colombia or LATAM We are seeking a highly motivated and detail-oriented QA Analyst to join our team. The ideal candidate will be responsible for ensuring the quality and reliability of our web platforms through comprehensive testing and automation. This role requires a strong understanding of web technologies, testing methodologies, and experience with modern automation tools like Reflect and Tosca, as well as proficiency in API testing with Postman, database testing with SQL, and the ability to effectively gather and analyze requirements. Responsibilities Gather, analyze, and document software requirements from various sources. - Translate business requirements into clear and concise testable specifications. - Participate in requirements review meetings and provide constructive feedback. - Identify and clarify ambiguities in requirements. - Develop and execute test plans, test cases, and test scripts for web platforms. - Perform functional, regression, integration, and performance testing. - Identify, document, and track defects using bug tracking systems. - Collaborate with developers, product managers, and other stakeholders to ensure quality throughout the software development lifecycle. - Design, implement, and maintain automated test suites using automated tools. - Analyze test results and provide detailed reports. - Stay up-to-date with the latest testing trends and technologies. - Participate in code reviews and contribute to process improvements. - Create and maintain test data. - Perform API testing using Postman to validate web services. - Execute SQL queries to validate data integrity and perform database testing.Requisitos:- Bachelor's degree in Computer Science, Software Engineering, or a related field. - Proven experience as a QA Analyst, with a focus on web platform testing. - Strong understanding of web technologies (HTML, CSS, JavaScript). - Experience with manual and automated testing methodologies. - Hands-on experience with test automation tools, specifically Reflect, Tosca, Selenium or Functionize. - Familiarity with bug tracking systems (e.g., Jira, Bugzilla). - Excellent analytical and problem-solving skills. - Strong communication and collaboration skills. - Proficiency in API testing with Postman. - Strong SQL skills for database testing and data validation. - Ability to effectively gather and analyze requirements. - Strong ability to document requirements.
Senior ML Ops Engineer
16/09/2025
Programming & Tech
Full time
Remote
Entry level
1600 to 2000 USD
Own model serving for multiple LLM/speech models on Modal. Build and maintain the APIs around those models. Create the feedback/eval loop to improve quality while meeting strict latency/cost SLOs. Responsibilities Host and scale real-time & batch inference on Modal (autoscaling, images/volumes/secrets). Operate a multi-model fleet (versioning, routing, canaries/blue-green, traffic shaping). Ship endpoints; auth, RBAC, quotas, rate limits, telemetry. Implement feedback pipelines, online A/B evals, and guardrails with actionable alerts. Drive performance: profiling, batching, quantization, KV-cache, runtime tuning. Establish observability and reliability (OTel, metrics/logs, SLOs, runbooks, on-call). CI/CD and IaC for reproducible builds and one-click rollbacks. Must-haves 5+ years in ML Ops/Platform/SRE with production LLM/ML serving. Strong Python; high-throughput async APIs (FastAPI/Starlette) and GitHub-based CI/CD. Deep experience with vLLM, TensorRT-LLM, Triton, or ONNX Runtime. Hands-on with Modal or equivalent GPU/k8s platform. Solid observability (OTel) and incident response/postmortems. Preferred ONNX export expertise (PyTorch→ONNX), quantized/dynamic graphs, custom ops. Safety/guardrails and constrained decoding. Systems perf (CUDA/Triton kernels) or Rust for hot paths; load/chaos testing.