Full Stack Software Development Engineer II

About the Role

As a Full Stack SDE II in Sigmoid's Product Engineering team, you will take ownership of building scalable, reliable, and user-centric web applications. You will collaborate closely with product managers, designers, and system architects to drive features from design to deployment, ensuring robust frontend performance, clean backend services, and efficient database architectures.

Key Responsibilities

Full Stack Development

• Design and build responsive, high-performance web interfaces using React, TypeScript, Tailwind CSS, and Shadcn UI, backed by reliable API services using Node.js or Python (FastAPI).

Database & API Design

• Model, query, and optimize relational data structures in PostgreSQL.
• Design, build, and maintain clean RESTful APIs and microservices.

Code Quality & Best Practices

• Apply SOLID principles, basic design patterns, and clean code principles to write maintainable, scalable, and self-documenting code.

Testing & Quality Assurance

• Implement comprehensive test suites using Jest, React Testing Library, or backend testing frameworks (e.g., PyTest) to maintain high code coverage and prevent regressions.

Agile Execution

• Actively participate in Agile ceremonies (sprints, stand-ups, retrospectives, and planning) to deliver quality code incrementally.

Collaboration & Mentorship

• Partner with cross-functional teams and mentor junior engineers through constructive code reviews and technical guidance.

Requirements & Qualifications

Technical Skills

Frontend

• 3–5 years of hands-on experience with React, TypeScript, Tailwind CSS, and modern UI component libraries like Shadcn UI.

State & Data Fetching

• Experience with modern client-side state management and data-fetching libraries (TanStack Query, Zustand, or Redux Toolkit).

Backend

• Strong expertise in server-side development using Node.js or Python (FastAPI).

ORMs & Data Layer

• Experience with ORMs or Query Builders such as Prisma, Drizzle, TypeORM, or SQLAlchemy.

Database

• Strong expertise in relational database modeling, query optimization, indexing, and management with PostgreSQL.

System Design & Patterns

• Practical experience applying SOLID principles, basic software design patterns (Factory, Singleton, Observer, etc.), and clean architecture principles.

API Development

• Solid grasp of API design standards, authentication/authorization using OIDC and OAuth 2.0, and backend-frontend integration.

Testing

• Proficiency in unit, integration, and component testing using Jest, React Testing Library, and PyTest.

Methodologies

• Strong operational knowledge of Agile/Scrum software development workflows.

Culture & Mindset

Analytical & Data-Driven

• Problem-solver who relies on metrics, root-cause analysis, and objective evidence to make sound technical and design choices.

Entrepreneurial & Agile

• Thrives in a fast-paced, high-growth environment, displaying high ownership, adaptability, and resilience.

Leader & Doer

• Balanced builder who can lead initiatives and mentor peers while remaining deeply hands-on in code implementation and debugging.

Communication

• Exceptional written and verbal communication skills to articulate technical concepts, align with stakeholders, and author quality documentation.

Nice to Have

Database & Caching

• Experience with caching strategies using Redis, or exposure to NoSQL databases (e.g., MongoDB).

Architecture & APIs

• Exposure to GraphQL, microservices architecture, and event-driven patterns (e.g., Kafka, RabbitMQ).

Cloud & DevOps

• Hands-on experience with containerization (Docker, Kubernetes), CI/CD pipelines, and cloud infrastructure (AWS, GCP, or Azure).

Security & Performance

• Understanding of web security best practices (OWASP Top 10, OAuth2, JWT) and web performance optimization techniques.