Improve response shapes, caching, payload size, and web performance.
Establish shared components and patterns across customer-facing and internal admin tools.
Key Success Indicators for this Role
Delivers stable, well-designed APIs that internal product surfaces and other engineers can reliably build on.
Ships end-to-end features that handle real-world states beyond the happy path.
Improves the reliability and performance of integrations, asynchronous workflows, and web experiences.
Must Have
1. Professional Expertise (Hard Skills & Experience):
5+ years building and operating production web applications across APIs and browsers.
Deep TypeScript experience; able to become productive quickly with Bun and Elysia.
Strong API design judgment across resource modelling, versioning, pagination, error contracts, idempotency, and authentication.
Experience with third-party and partner API integrations, including authentication, webhooks, retries, rate limits, timeouts, and production failure modes.
Experience with queues, background jobs, and idempotent workers.
Practical caching knowledge, including cache placement and invalidation.
Self-sufficient SQL skills for modelling straightforward domains and writing queries.
Security fundamentals: authentication, authorization, session and token handling, input validation, and common web attack surfaces.
Deep Next.js and React knowledge, including server components, SSR, static rendering, and client rendering.
2. Communication & Documentation:
Designs API contracts with the needs of their consumers in mind.
Collaborates effectively across API and frontend work to deliver complete product experiences.
3. Personality & Behavioral Traits:
Moves between backend and frontend work without friction.
Takes ownership of features end to end and considers real-world states, not only the happy path.
Cares about how the product looks and feels, closing gaps between mockups and production-ready screens.
4. Culture & Career:
Contributes to shared components and product patterns that make future work faster and more consistent.
Balances reliability, performance, and product quality across customer-facing and internal tools.
Nice to Have
Experience with event-driven or queue-based distributed systems.
Production experience with realtime transport such as MQTT or an equivalent pub/sub broker.
Deep PostgreSQL knowledge, including query plans, indexing strategy, and schema migrations on live systems.
Production experience with Redis, DragonflyDB, ClickHouse, or other data stores beyond PostgreSQL.
Deep Next.js App Router knowledge, including server actions, streaming, caching, and revalidation.
Experience with web performance tooling, including Core Web Vitals, bundle analysis, image optimization, and font optimization.
100% salary during probation
Competitive salary + 13th-month bonus
Annual salary review
Premium health insurance from Bao Viet after probation
Transportation support
Lunch, coffee, and snacks
All statutory benefits per Vietnamese Labor Law
Work Environment
In-office, collaborative working environment
Professional English-speaking workplace
Supportive, fast-moving team
Opportunity to build new product areas from the ground up
Working time : 9am-6pm, Mon - Fri
Working Location: The Sun Avenue, 28 Mai Chi Tho, Binh Trung ward, HCM City
