Senior Software Engineer, Fullstack

ELSA•Thủ Đức, OR

11h•Remote

About The Position

ELSA is a global leader in AI-powered English communication training, dedicated to transforming how people learn and speak English with confidence. Founded in 2016 and headquartered in San Francisco, we operate across the U.S., Vietnam, Portugal, Indonesia, Brazil and Japan. Powered by proprietary speech-recognition technology and generative AI, ELSA delivers real-time, hyper-personalized feedback to help learners improve pronunciation, fluency, and overall communication effectiveness. With over 50 million learners and 1 billion hours of anonymized speech data, ELSAs depth of language training intelligence is unmatched in the industry. Our B2B flagship platforms ELSA Enterprise and ELSA Schools empower organizations and educational institutions to elevate communication capabilities and unlock personal and professional opportunities for their people. We design engaging, bite-sized learning experiences that adapt to each learner's goals and context, ensuring measurable improvement and lasting confidence. Our vision is to become the global standard for real-time English communication training, enabling 1.5 billion language learners worldwide to speak clearly, be understood, and share their stories with the world. Backed by world-class investors including Googles Gradient Ventures, Monks Hill Ventures, and SOSV, ELSA has been recognized among the top global AI innovators: Forbes Top 4 Companies Using AI to Transform the World Research Sniper Top 5 Best AI Apps ASU+GSV EdTech 150 CB Insights Top 100 AI Companies Join us in shaping the future of language learning and empowering millions to unlock opportunity through confident communication. About ELSA School ELSA School is our B2B platform that helps educational institutions deliver AI-powered English training at scale. We serve schools, universities, and government programs across Japan, Korea, and Southeast Asia markets where product quality, reliability, and attention to detail are non-negotiable. Role Summary We're looking for a Senior Fullstack Engineer to be the technical partner for ELSA School's growth in our most quality-conscious enterprise markets, starting with Japan. You'll own features end-to-end - from Flutter web frontends to backend APIs — with a sharp focus on quality, performance, and user experience

Requirements

8+ years of fullstack engineering experience with production-scale web applications
Strong frontend skills — Flutter Web preferred, or React/TypeScript with willingness to work in Flutter
Solid backend experience — Node.js, Python, or Go with RESTful API design
Experience with SSO/identity (SAML, OAuth2, OIDC) and multi-tenant SaaS architectures
Track record of shipping high-quality software in enterprise or B2B contexts
Comfortable working across timezones with distributed teams (Vietnam, India, APAC)
Strong written and verbal English communication

Nice To Haves

Experience building products for the Japanese market or working with Japanese enterprise clients
Familiarity with AWS (EKS, DynamoDB, Lambda), Firebase, or similar cloud-native stacks
Background in EdTech, language learning, or AI-powered products
Exposure to observability tools (Sentry, SigNoz, Datadog) and DevOps practices

Responsibilities

Architect and ship production features across the ELSA School web platform (Flutter Web + backend services)
Own technical quality for enterprise clients in Japan and APAC — driving zero-defect releases and pixel-perfect UIs
Design and build scalable APIs, SSO integrations (SAML, OIDC), and multi-tenant platform capabilities
Partner with Product, Design, and B2B Sales to translate enterprise requirements into robust technical solutions
Establish engineering standards: code reviews, testing, CI/CD, and observability
Mentor junior engineers and contribute to a culture of craftsmanship

Benefits

Flexible work setup: Remote-first for Singapore, India, Indonesia, Malaysia; hybrid model for Vietnam.
Comprehensive employee well-being benefits.
Free ELSA Premium courses to polish your language skills
Collaborative, international team culture.
Opportunity to contribute to a fast-growing, well-funded Silicon Valley startup with global impact.

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