About Filum

Founded in 2020, Filum (fē'lum) is dedicated to providing best-in-class customer experience solutions that enable companies to create more engaging customer experiences and sustainably grow their business. At Filum, we are on a mission to help businesses grow and operate sustainably with data-driven insights.

What's the opportunity? 🤔

Joining Filum means becoming part of a young and ambitious team, fearless enough to pursue excellent experiences for companies. A team committed to the mission of creating sustainable growth for businesses by driving a data-driven and more human culture.

As a Backend Engineer at Filum, you will play a critical role in designing and building scalable and secured backend systems that power our innovative products . You will work closely with cross-functional teams to solve complex problems, always striving for the best solutions and going the extra mile to exceed expectations.

Daily Work

Backend Development:

• Design, develop, and maintain backend services using Python and JavaScript.
• Build and optimize APIs using frameworks like FastAPI and NestJS.
• Participate in system design discussions and contribute ideas and feedback.

Technical Implementation:

• Write clean and easy-to-maintain code with tests to ensure high-quality output.
• Design schemas, optimize queries and indexes for Postgres and MongoDB.
• Troubleshoot and debug applications.
• Optimize applications for performance and scalability.
• Apply security and data protection best practices.

Collaboration & Innovation:

• Collaborate with front-end developers to integrate user-facing elements with server-side logic.
• Work closely with product teams to translate end-user requirements into backend solutions.
• Participate in code reviews and design discussions with mid and senior engineers to grow technical proficiency.
• Go the extra mile to identify areas of improvement and propose innovative solutions.

Must have

Technical Skills:

• Bachelor's degree or equivalent in Computer Science, Engineering, or related field.
• 1.5+ years of experience in backend development with strong focus on Python or JavaScript.
• Are actively working with frameworks such as FastAPI or NestJS.
• Solid experience with SQL or NoSQL databases.
• Good understanding of Backend design principles.

Experience & Knowledge:

• Strong problem-solving skills with a knack for finding the best solutions.
• Ability to work independently and as part of a team in a fast-paced environment.
• Strong communication skills to effectively collaborate with team members and stakeholders.
• Curious and have a passion for learning and staying updated with the latest industry trends.
• Pair-programming with GenAI experience.

Nice-to-have

• Knowledge of cloud platforms (GCP, AWS, Azure) and deployment strategies.
• Basic understanding of micro-services architecture.
• Experience with containerization technologies (Docker, Kubernetes).
• Experience with testing frameworks and CI/CD pipelines.
• Experience with Agile.

Not a good fit

• Have no experience working with production-level backend projects recently.
• Not comfortable working with Python or JavaScript.
• No experience with database management (SQL or NoSQL).

What You’ll Get

💰 Compensation & Perks

• 13th-month salary according to company policy.
• Full insurance coverage in compliance with Vietnam Labor Law (Social, Health, Unemployment Insurance).

🎉 Culture & Work Environment

• Agile and open startup culture – where you‘re encouraged to experiment, fail fast, and learn even faster.
• Have access to Filum’s founders and leadership team for fast feedback loops from people with deep experience.
• Open-space office located in District 2 .
• Regular team activities: Company Trips, Happy Hours, Birthday celebrations, and holiday gifts (e.g. Women‘s Day, Year-end, etc.).

📚 Learning & Career Growth

• Work with a small and fast-moving team , gaining insight into real enterprise-level production system.
• Hands-on experience solving complex customer challenges in areas like AI, CDP, and CXM .
• Clear growth path based on impact and ownership, with opportunities to grow from Junior to Mid-level and beyond.

🚀 Personal Development & Ownership

• You’ll be part of a growth-mindset, AI-native team – expected to take initiative, solve problems proactively, and always look for better ways to deliver value.
• You’ll get regular feedback, code reviews, and mentorship to help you grow safely in production systems.
• Real ownership: You’ll have the space and support to build → fail → learn → scale – not just execute tasks.