Sigma Software Group

• Develop and maintain full-stack features in a production environment. • Build user-facing functionality using TypeScript, React, and Next.js. • Work with server-side rendering and general Next.js patterns. • Build, consume, and maintain GraphQL APIs, ideally using Apollo. • Read, write, and maintain backend services in Python. • Contribute to API design, data modeling, and service-to-service communication. • Support integrations with CRMs, telecom providers, and AI-related vendors. • Work with MongoDB and Aurora / PostgreSQL for data storage. • Participate in debugging across the stack — from browser DevTools to backend logs. • Work with Docker and containerized deployments. • Contribute to CI/CD improvements, deployment safety, logging, monitoring, and observability. • Help keep production services stable, reliable, and easy to support. • Communicate directly with the customer team and take ownership of tasks from start to finish.

• Assist the Data Engineering team with migration from BigQuery to Snowflake • Translate and optimize SQL queries across platforms • Perform end-to-end validation to ensure data correctness and pipeline reliability • Write and maintain incremental dbt models • Collaborate closely with data engineers, analysts, and stakeholders to understand data needs and deliver solutions • Participate in code reviews, share knowledge, and contribute to team best practices • Document work clearly to support maintainability and knowledge sharing

• Build and improve product dashboards and internal web tools used across the AdTech domain, including publisher- and platform-facing experiences • Develop and maintain backend APIs and microservices powering reporting, integrations, and core product workflows • Support internal services used by engineering and threat research teams, translating operational needs into reliable product capabilities • Refactor and enhance existing codebase for performance and maintainability • Collaborate closely with teammates on feature delivery, bug fixing, integration testing, and deployment through development/staging environments • Work across multiple products and codebases within the same sprint • Participate in engineering routines such as ticket grooming, task breakdown, estimation, and technical improvements • Contribute to system reliability and modernization efforts, including service migrations and improved deployment/rollback practices • Participate in code reviews, knowledge sharing, and team best practices • Document work clearly to support maintainability and knowledge sharing

• Collaborate directly with customers, providing strategic guidance and technical expertise. • Own the vision for AI operations implementation, building end-to-end workflows and taking them to production. • Translate complex business challenges into actionable technical plans. • Rapidly prototype AI solutions to demonstrate possibilities to clients. • Engineer production-grade AI solutions with deep knowledge of AI tooling, architecture, and deployment. • Manage stakeholder alignment, proactively escalating issues and requesting support when necessary. • Design and build LLM workflows, RAG pipelines, agentic systems, and custom data pipelines.

• Design separate components, modules, classes, devices • Code, debug, document, and maintain portions of software and hardware • Perform different types of testing • Participate in estimation and planning sessions • Contribute to the development of technical project documentation and user documentation • Provide assistance to test engineers and support personnel in solving technical issues of software installation and its operation • Participate in conference calls and face-to-face meetings with the Customer and Customer partners • Comply with the best engineering practices, technical standards, and quality criteria set forth on the project • Report status and progress according to the project and company demands • Spot current deficiencies in the development process, adopted procedures, and engineering practices, environment configurations, etc., and suggest improvements • Escalate technical issues to the Architect, Team Lead, and Project Manager

• Projetar, desenvolver e implementar sistemas distribuídos em larga escala para garantir escalabilidade, baixa latência e tolerância a falhas • Desenvolver e manter recursos front-end usando React JS • Implementar APIs e soluções orientadas a eventos para atender aos requisitos do sistema • Criar e executar testes unitários, testes de API, testes de regressão e testes de desempenho • Otimizar soluções para escalabilidade, confiabilidade e alto desempenho • Colaborar estreitamente com equipes multifuncionais para resolver incidentes de produção

• Attend all sessions regularly and actively participate in practical activities • Complete homework assignments after each session on time • Demonstrate fast learning and continuous progress • Work on real design tasks and receive feedback from mentors

• Design and implement large-scale software solutions and components using multiple technologies, with a primary focus on Node.js and ReactJS • Maintain a consistently high level of quality throughout all stages of the development • Communicate effectively to collaborate closely with the team and gain full context for complex tasks • Follow the best engineering practices, as well as company and client guidelines • Play supervisory, advisory, and coaching roles for less-experienced engineers on the team • Promote clean code, as well as design patterns and principles

• Develop and maintain scalable web applications using React.js and TypeScript • Build responsive, user-friendly, and reusable UI components following best practices • Integrate frontend applications with APIs and backend services • Collaborate with product, backend, and UX teams to clarify requirements and deliver solutions • Write clean, maintainable, and efficient code with strong testing and debugging practices • Troubleshoot and resolve issues across frontend applications and user flows • Participate in code reviews and contribute to continuous improvement and knowledge sharing • Work independently in a fast-paced environment, supporting estimations, problem-solving, and technical discussions

• Design and implement large-scale software solutions and components using multiple technologies, with a primary focus on Node.js and ReactJS • Maintain a consistently high level of quality throughout all stages of the development • Communicate effectively to collaborate closely with the team and gain full context for complex tasks • Follow the best engineering practices, as well as company and client guidelines • Play supervisory, advisory, and coaching roles for less-experienced engineers on the team • Promote clean code, as well as design patterns and principles