[HN] Full-Stack Engineer

Your role & responsibilities

What you will own

• Build and deliver full-stack features across frontend, backend, APIs, and integrations — from requirements through release.
• Translate product and delivery needs into technical designs, implementation milestones, and maintainable code.
• Own technical design decisions including data modelling, API design, and system integration patterns.
• Build and maintain RESTful APIs and service modules that integrate with internal and third-party services.
• Model, query, and serve data efficiently, with attention to query performance and data integrity.
• Improve maintainability, reliability, performance, security, and developer experience across the systems you touch.
• Diagnose and resolve issues across frontend, backend, APIs, databases, and deployment boundaries, including production incidents.
• Define and uphold coding standards, review code, and mentor other engineers.
• Participate in code reviews, estimation, and team delivery rituals; document what future engineers need.

 

Core technology stack

• Frontend: TypeScript, Vue.js, and React (Next.js-style modern web applications), component-driven UI, browser APIs, and frontend state management.
• Backend / API: Python and Node.js services, REST-style APIs, integrations, background jobs, and service-to-service interfaces.
• Data: Relational databases such as PostgreSQL — schema design, queries, query performance, and practical data modelling.
• Delivery: Git and pull-request workflows, automated tests, Docker/containerized services, CI/CD, and basic logging and observability.
• Quality & security: Web security fundamentals (OWASP), authentication and authorization, and a focus on reliability and maintainability.

Your skills & qualifications

What we are looking for

• Strong professional experience building full-stack web applications with modern TypeScript-based frontends and backend services (Python and/or Node.js).
• Ability to design, implement, test, debug, and deploy production-grade features.
• Comfort working across frontend, backend, APIs, relational databases, application state, and UI components.
• Sound understanding of reliability, performance, security, and maintainability.
• Strong Git, debugging, testing, and code-review habits, and a track record of mentoring other engineers.
• Clear communication about progress, uncertainty, blockers, and tradeoffs.
• Willingness to travel up to 50% of the time, on short notice when required (see Travel).
• Professional working English.

 

Travel

This role requires a willingness to travel up to 50% of the time. Travel is need-driven rather than scheduled — when a client engagement, on-site deployment, or operational requirement arises, you are expected to travel as required, including across Asia Pacific and the Middle East.

 

Nice to have

• Experience with Python/FastAPI and service-oriented architectures.
• Experience with geospatial data or GIS — PostGIS, GeoJSON, GDAL/OGR, spatial queries and indexing.
• Experience with map-based visualisation libraries (Mapbox GL JS, Leaflet, OpenLayers, deck.gl) or geospatial APIs.
• Authentication and authorization depth (OAuth2, JWT, RBAC); WebSockets and real-time or streaming architectures.
• Cloud platforms (AWS, GCP, or Azure), containers, CI/CD, and observability experience.
• Experience with data-heavy or enterprise web systems and distributed teams.
• Exposure to defense, government, or intelligence-adjacent technology environments.

 

First 90 days

• Understand the relevant systems, workflow, delivery context, and current risks.
• Deliver scoped improvements with clear communication and review.
• Reduce bottleneck pressure in your area by leaving behind maintainable code, documentation, checks, runbooks, or reusable patterns.

 

How we evaluate

We evaluate candidates through a practical full-stack design and debugging discussion, a past feature walkthrough, ownership and code-quality judgment, architectural decision-making, communication, and collaboration.

Benefits for you

• To be discussed during the hiring process.
• Working in international company, with chances to travel abroad for business trips
• Competitive salary and leave package
• Health insurance
• International company with travel abroad experience (full travel cost borne by company)
• Timely and well structured social insurance payouts
• Leadership development opportunities and training programs 

 

Working location:

• 5th Floor, CT2 Building, CT14 Bac Ha, To Huu Street, Dai Mo Ward, Hanoi