Full-Stack Developer Intern
Letzstepin
- Locatie
- Anywhere
- Geplaatst
- 9 okt 2026
Controleer vóór je solliciteert op de website van de werkgever of de vacature nog openstaat en bekijk de volledige voorwaarden.
Functieomschrijving
De interface is in het Nederlands. Functietitels en beschrijvingen van werkgevers blijven in de oorspronkelijke publicatietaal, die Engels kan zijn.
Full Stack Developer InternBuild. Secure. Deploy. Scale.
LetzStepIn Private Limited is looking for a Full Stack Developer Intern who wants to build real products, solve real business problems, and see their work move from code to production.
This is a hands-on opportunity within a fast-growing technology startup, where you will contribute to LetzStepIn's in-house technology ecosystem, client requirements where applicable, VR/digital experiences, and the upcoming Immersive Marketplace (Super App).
We are looking for someone who can think independently, write custom code, build across the stack, create excellent user experiences, deploy applications, solve problems, and deliver with speed without compromising accuracy or security.
🚀 WHAT YOU'LL WORK ON1. Virtual Reality & Digital Solutions
Build and enhance responsive web experiences supporting LetzStepIn's 360° Virtual Tours, VR solutions and immersive digital experiences for real-world properties and businesses.
2. Immersive Marketplace — Upcoming Super App
Contribute to the development of LetzStepIn's upcoming Immersive Marketplace, including web applications, dashboards, listings, search, user flows, APIs, databases, authentication, integrations and other product modules.
3. In-House & Client Projects
Develop and maintain websites, web applications, dashboards, landing pages, APIs, integrations and custom digital solutions for LetzStepIn and its clients, whenever required.
💻 WHAT YOU'LL DO
Develop custom, scalable and maintainable full-stack applications.
Build modern, intuitive and functional UI/UX.
Ensure applications are fully responsive across mobile, tablet, laptop and desktop.
Develop frontend applications using HTML, CSS, JavaScript, React, Next.js or equivalent technologies.
Develop backend services, APIs and business logic using Node.js, Express, NestJS or equivalent technologies.
Work with MySQL, PostgreSQL, MongoDB or equivalent databases.
Build and integrate REST APIs and third-party services.
Use Git and GitHub for version control and collaborative development.
Deploy and maintain applications through Hostinger/hPanel and relevant hosting/server environments.
Understand domains, DNS, SSL, environment variables, databases, build processes and production deployment.
Debug independently and identify root causes rather than simply fixing symptoms.
Optimize applications for performance, responsiveness and reliability.
Test features across devices and browsers before release.
Convert business and client requirements into practical technical solutions.
Maintain clean, readable and maintainable code and appropriate technical documentation.
Node.js web applications including React, Next.js, Vite, Express and NestJS, with GitHub-based deployment and configurable build/start environments.
🔐 SECURITY IS NON-NEGOTIABLE
Security must be considered during development—not after development.
You will be expected to follow secure coding practices and understand common risks including:
Broken Access Control · Security Misconfiguration · Injection · Authentication Failures · Cryptographic Failures · Insecure Design · Software Supply-Chain Risks · Data Integrity Failures
You must:
Protect passwords, credentials, API keys, tokens and sensitive information.
Never hard-code secrets into source code.
Apply appropriate authentication and authorization.
Validate and sanitize inputs.
Secure APIs and database interactions.
Follow appropriate HTTPS/SSL practices.
Keep dependencies reasonably updated.
Avoid exposing sensitive information through errors, logs or APIs.
Identify and report security vulnerabilities.
Follow LetzStepIn's confidentiality and security requirements.
These expectations align with the current OWASP Top 10:2025 secure-development framework.
Our standard:
Functional + Responsive + Tested + Performant + Maintainable + Secure
🤖 AI-ASSISTED — NOT AI-DEPENDENT
AI tools are part of modern software development and may be used responsibly for research, learning, debugging and productivity.
However, AI cannot replace engineering fundamentals.
You must be able to:
Write custom code independently.
Understand the code you use.
Explain your implementation.
Debug without depending entirely on AI.
Review AI-generated code for bugs and security risks.
Modify solutions according to actual requirements.
Make technical decisions independently.
Validate before deploying.
Use AI to accelerate engineering—not to replace engineering thinking.
Selected assessments may include custom coding, debugging and problem-solving exercises without AI assistance.
⚡ STARTUP EXECUTION
We operate in a fast-moving startup environment.
Development speed matters.
Accuracy matters.
Security matters.
User experience matters.
You will be expected to:
Understand → Plan → Build → Test → Deploy → Improve
We value developers who can move quickly without sacrificing quality, security, performance or maintainability.
> “It works on my machine” is not considered finished.
🎯 MUST-HAVE SKILLS
HTML5
CSS3
JavaScript
Responsive Web Development
Frontend & Backend Development
REST APIs
Database Fundamentals
Git & GitHub
Debugging & Problem Solving
UI/UX Fundamentals
Hosting & Deployment Fundamentals
Secure Coding Fundamentals
Ability to write custom code independently
Strongly Preferred
React.js
Next.js
Node.js
Express.js / NestJS
TypeScript
MySQL / PostgreSQL / MongoDB
Authentication & Authorization
API Integrations
Figma or equivalent UI/UX tools
Web Performance Optimization
Web Security
Hostinger / hPanel
VPS / Server Fundamentals
Testing
CI/CD
Docker
🧠 WHO WE'RE LOOKING FOR
You don't need to know everything.
But you should be:
Curious enough to learn.
Independent enough to solve.
Technical enough to build.
Fast enough to deliver.
Disciplined enough to test.
Responsible enough to secure.
Adaptable enough to work in a startup.
We value problem-solving ability, learning speed, ownership and execution as much as technical knowledge.
🌐 YOUR IMPACT
Your work may contribute directly to:
LetzStepIn's In-House Technology → VR Solutions → Client Projects → Immersive Marketplace → Future Digital Products
You will gain exposure to the complete development lifecycle:
Requirement → Architecture → UI/UX → Development → Database → API → Testing → Security → Deployment → Optimization
This is an opportunity to learn how real software is engineered, deployed, maintained and improved inside a growing technology startup.
THE LETZSTEPIN ENGINEERING MINDSETDon't just learn to code. Learn to engineer.Don't just build features. Build experiences.Don't just use AI. Understand the code.Don't just ship fast. Ship right.Don't just make it work. Make it secure.Don't just complete the task. Own the outcome.
If you want to build real products, solve real problems, write real code and see your work go live—this is the opportunity to build your engineering career at LetzStepIn.