Join the Team Building AI Tools for Real Classrooms
We’re a small team shipping practical, educator-first products. If you love solving messy real-world problems with thoughtful design or brilliant engineering or strong communication, you’ll fit right in.
Life at 3Sigma
Mission, not noise
We build for educators. We prioritize impact, clarity, and outcomes over busywork.
High ownership
Small teams, fast shipping, clear decisions. You’ll own meaningful work end-to-end.
Flexible & human
We value focus, kindness, and a sustainable pace, supported by flexibility.
Open Roles
Ready to build with us? We’re hiring!!
Apply to an open role below. Don’t see the perfect match? Email us anyway — we love meeting great people. careers@3sigma.ai
Front End / Mobile Software Engineer
Remote
Full-time
Build reliable workflows for teachers: from data capture, to insights mining and reporting.
Responsibilities
- Collaborate closely with Designers, Product Managers, and other Engineers to deliver features and maintain availability.
- Design and implement features through well-defined interfaces across multiple components and services.
- Drive software engineering practices through code & design reviews.
Qualifications
- Obtained or in the process of getting a Bachelor’s Degree or higher in Computer Science, or related technical discipline.
- Technical engineering experience with coding in languages including, but not limited to, C, C++, Java, JavaScript, or Python.
- Proficiency in developing front-end applications based on provided UI/UX wireframes with component-based frameworks (specifically React), ensuring a responsive and user-friendly experience.
- Alternative Skillset: proficiency in React Native
- Bonus : strong ability to design and implement backend services following specified architectural principles and best practices.
- Bonus: experience working with ML/DL models.
Note: a short term contract is also available for this position.
UI / UX / Product Designer
Remote
Full-time
Design simple, usable, elegant flows to empower teachers.
Responsibilities
- Collaborate closely with product managers, engineers, and designers in a fast-moving, cross-functional startup environment.
- Support end-to-end UX design, from problem framing and concept exploration to wireframes, prototypes, and final designs.
- Explore and articulate multiple design directions (e.g., A/B variants), clearly explaining the UX rationale, assumptions, and trade-offs.
- Ground design decisions in user needs, behavioral observations, and constraints, and iterate based on feedback and learnings.
- Contribute to design systems and lightweight documentation to maintain clarity while moving quickly.
Qualifications
- Design experience through internships, startups, or personal projects.
- Strong UX thinking and communication skills, with the ability to explain why a design works, not just what it looks like.
- Comfort working with ambiguity and evolving requirements.
- Solid foundation in user-centered design and usability principles.
- Proficiency with Figma or similar tools.
- Bonus: experience in EdTech or learning-focused products.
Note: a short term contract is also available for this position.
AI / ML Engineer
Remote
Full-time
Use modern ML techniques to turn messy classroom artifacts (photos, PDFs, handwriting, text) into structured insights teachers can trust.
Responsibilities
- Prototype and productionize AI features across the full lifecycle: data → model/prompt → evaluation → deployment.
- Design pipelines for document/image understanding, retrieval, and structured outputs that integrate cleanly with product.
- Define metrics that match real classroom expectations.
- Optimize latency, cost, and robustness (edge cases, noisy inputs, multilingual content) with strong observability and error handling.
- Collaborate closely with Product, Design, and educators to scope work, iterate quickly, and communicate tradeoffs clearly.
Qualifications
- Obtained or in the process of getting a Bachelor’s Degree or higher in Computer Science, or related technical discipline.
- Strong Python skills and experience shipping production data systems.
- Hands on ML experiences, e.g., prompt design, embeddings / RAG, structured output validation, evaluation design, MLOps.
- Strong bonus: experience with multi modality and time series.
Customer Success Specialist
On Site (Thailand)
Full-time
Own school relationships from first demo to renewal: drive adoption, prove impact, and grow accounts.
Responsibilities
- Run structured discovery sessions with school leaders and teachers, understand needs, constraints, and recommend the right rollout plan.
- Deliver product demos, manage coordinate pilots, and support procurement conversations through to close.
- Lead onboarding and training and ensure early measurable value.
- Track and communicate product usage, risks and outcomes.
- Manage renewals and identify expansion opportunities (additional seats, schools, modules) with a healthy pipeline.
Qualifications
- 1+ years in customer success, account management, sales, or a customer-facing role with measurable targets.
- Strong communication and presence, e.g., comfortable leading meetings, trainings, and negotiations.
- Organized and data driven, e.g. comfortable using a CRM and keeping notes, comfortable recording and analyzing data to support decisions.
- Based in Thailand and able to travel locally for school visits as needed.
- Strong Bonus: experience selling to schools; Thai + English fluency.
We welcome applicants of all backgrounds.
If you need any help during the process, email careers@3sigma.ai.
How We Hire
1) Apply
Send your resume + links (GitHub/portfolio). A short note helps.
2) Interviews
Meet the people you’ll work with. We optimize for collaboration and clarity.
3) Offer
Clear expectations, transparent compensation, and a plan for onboarding.

© 2025 3Sigma Holdings Pte. Ltd.
All Rights Reserved.