OPSWAT Software Vietnam ★ 3.7

OPSWAT, a global leader in IT, OT, and ICS critical infrastructure cybersecurity, delivers an end-to-end platform that gives public and private sector organizations and enterprises the critical advantage needed to protect their complex networks, secure their devices, and ensure compliance. Over the last 20 years our commitment to innovative technology has earned the trust of more than 1,700 organizations, governments, and institutions globally, solidifying our role in protecting the world’s critical infrastructure and securing our way of life.

Job Summary

We are seeking a highly skilled and experienced Middle Full Stack Developer with deep expertise in Python / .NET core. You will be a member of our engineering team, responsible for designing, developing, and deploying robust, scalable, and high-performance web applications. The ideal candidate is a proactive problem-solver who can take ownership of the entire development lifecycle, from conceptualization to deployment and maintenance

Role Summary

You will deliver end-to-end features (frontend + backend), lead technical decisions, improve scalability and reliability, and handle AWSd DevOps responsibilities (CI/CD, infrastructure, monitoring, incident response). Additionally, you will apply AI-assisted development (“vibe coding”) using tools like Cursor, Codex, and Claude to speed up implementation, testing, refactoring, and documentation—while maintaining strong engineering discipline.

Key Responsibilities

Product & Engineering Delivery

• Build and maintain backend services using Python (FastAPI/Django) and .NET (ASP.NET Core).
• Deliver frontend features using HTML & Javascript and/or React (or the platform’s current stack).
• Design and evolve REST APIs, integrate third-party services (SSO, email, analytics, etc.).
• Implement secure auth flows (OAuth2/OIDC, JWT), RBAC for learners/admins/instructors.
  
  
  

Architecture & Quality

• Drive architecture decisions: service boundaries, data modeling, caching, background jobs, scalability patterns.
• Establish and enforce engineering best practices: code reviews, testing strategy, CI gates, observability, documentation.
• Improve performance: database query optimization, caching, async processing, and frontend performance.
• Mentor engineers and raise team execution quality.
  
  
  

AWS DevOps & Platform Operations

• Own deployments and production reliability on AWS across environments.
• Maintain CI/CD pipelines (Argo CD) with automated tests and safe deployments.
• Manage infrastructure with IaC: Terraform / CloudFormation.
• Operate AWS services as needed:
• Compute/containers: EC2 / ECS / EKS / Lambda
• Data: RDS (PostgreSQL/MySQL), S3, optional DynamoDB/ElastiCache
• Networking: VPC, Security Groups, ALB/NLB, Route53
• Observability: CloudWatch dashboards/alarms/logs/traces
• Participate in incident response, RCA, postmortems, and preventive improvements.
  
  
  

AI-Assisted Development (Vibe Coding) Responsibilities

• Use Cursor / Codex / Claude (and similar AI tools) to accelerate:
• Feature scaffolding, refactoring, and code generation
• Writing unit/integration tests and improving coverage
• Debugging and log-driven troubleshooting
• Creating technical documentation, ADRs, runbooks
• Generating migration scripts, API clients, and tooling
• Validate AI-generated output rigorously:
• Ensure correctness, security, maintainability, and performance
• Enforce coding standards and architecture consistency
• Avoid introducing license/security risks or leaking sensitive data
• Contribute to team practices for AI usage:
• Prompt patterns, review checklist, guardrails, and reusable templates
  
  
  

Requirements (Must have)

• 3+ years of software engineering experience delivering full-stack systems in production.
• Strong hands-on experience with:
• Python backend development (FastAPI/Django/Flask)
• .NET / C# (ASP.NET Core Web API, background services)
• Solid frontend experience with React (or equivalent) and TypeScript/JavaScript.
• Strong knowledge of SQL databases (PostgreSQL/MySQL), schema design, indexing, query tuning.
• Production experience with AWS: deployments, monitoring, scaling, security basics (IAM least privilege).
• Proficient with Docker and working knowledge of ECS/EKS (or similar).
• Strong ownership: ability to lead technical decisions, break down work, deliver reliably.
• Experience using AI coding tools (Cursor/Codex/Claude) in real projects to improve development velocity and quality.
• Complete tasks as assigned by the Line Manager.
  
  
  

Nice to have

• Experience with LMS / e-learning platforms (quizzes, grading, certification, analytics).
• Experience with SSO/OIDC, SCORM/xAPI (if applicable).
• Event-driven systems and queues (SQS/SNS/RabbitMQ).
• Caching (Redis), search (Elastic), CDN (CloudFront).
• Experience mentoring and improving engineering processes.
  
  
  

Tech Stack (adjust to actual platform)

• Backend: Python (FastAPI/Django), .NET (ASP.NET Core)
• Frontend: React/TypeScript, HTML/Javascript
• Data: PostgreSQL/MySQL, Redis (optional)
• Infra: AWS (ECS/EKS/EC2, RDS, S3, CloudWatch, ALB, Route53), Azure (optional)
• Source Control: BitBucket, Azure GitHub
• IaC: CloudFormation
• CI/CD: Argo CD
• AI Tools: Cursor / Codex / Claude (prompting + review guardrails)
  
  
  

OPSWAT is an equal opportunity employer. We celebrate diversity and are committed to providing an environment where equal employment opportunities are extended to all employees and applicants, free of discrimination and harassment of any type. All employment decisions are based on individual qualifications, job requirements, and business needs without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other category protected by federal, state, or local laws.

Recruiting Agencies: we do not accept unsolicited resumes from third party agencies for any of our open positions. To submit resumes for our jobs, there must be a recruiting contract approved by our legal team and endorsed by both parties. We are currently not accepting additional 3rd party agencies at this time.