Middle Full-Stack Engineer (JS + Go)

• 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

• 3+ years of experience in software engineering
• Strong knowledge of JavaScript core concepts (Event Loop, Promises, Async/Await, Prototypes, Closures)
• Solid understanding of Golang fundamentals (Goroutines, Channels, Interfaces, Error handling)
• Experience with React (hooks, state management via Redux Toolkit/Zustand/Context API, component lifecycle)
• Strong backend development skills with Node.js and RESTful APIs using Express.js, NestJS, or Fastify
• Basic Docker knowledge for managing local development environments
• Advanced Git workflows (feature branching, rebasing, conflict resolution)
• Experience writing unit and integration tests (Jest, React Testing Library, Go testing package)
• Upper-Intermediate level of English

WILL BE A PLUS:

• Snowflake: DWH concepts, data processing, analytical queries
• MongoDB: NoSQL concepts, document modeling, aggregation pipelines
• SQL: Writing/optimizing complex queries, understanding indexes, joins, relational database design
• Basic DevOps tooling: Kubernetes (view logs, basic concepts), Grafana (use dashboards for monitoring)

PERSONAL PROFILE:

• Collaborative mindset and open communication style
• Curiosity and willingness to learn new tools
• Good organizational skills and task management in fast-paced environments

Are you passionate about building secure, high-performance applications and working with modern technologies? We are looking for a Middle Full Stack Engineer to join our team remotely and contribute to cutting-edge security solutions.

At Sigma Software, we value innovation, collaboration, and continuous growth. This role offers the opportunity to work on impactful data infrastructure, gain hands-on experience with a cloud-native stack, and be part of a feedback-driven culture where every voice matters.

If you’re eager to learn, improve your skills, and make a real difference in the digital security space, we’d love to hear from you.

CUSTOMER
Our Customer provides comprehensive security solutions designed to protect individuals, organizations, and communities. Operating across multiple sectors, they address vulnerabilities and ensure protection against a wide range of risks, with a strong focus on digital security.

PROJECT
The project delivers comprehensive visibility and autonomous governance over dynamic execution patterns. By enforcing real-time operational protocols, it safeguards high-value information assets against unauthorized exfiltration and proactively neutralizes systemic anomalies to ensure total environment stability.

Key Technologies: JavaScript, Golang, React, Node.js, Docker, Git, Jest, Snowflake, MongoDB, SQL, Kubernetes, Grafana