Lead / Senior Fullstack Engineer at GRADION

Availability unverified

Hands-on engineering and architecture across production systems, including LLM APIs, agents, RAG or evaluation. Requires 10+ years building production software and evidence of shipped AI systems. Remote work is explicitly offered to candidates based in Hanoi or Can Tho.

GRADION

Location: Hanoi / Can Tho · Remote eligible; other listed locations hybrid
Work arrangement: hybrid
Technologies: AI

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Role overview

We are looking for a pragmatic, adaptable, and seasoned Lead / Senior Fullstack Engineer to join our engineering team.

This is a hands-on individual contributor role. You'll design systems, write code, prototype ideas, debug the failures nobody else can reproduce, review the implementations that matter, and work alongside engineers and Tech Leads wherever deeper expertise is needed.

Your influence here won't come from managing people. It comes from the systems you improve, the technical decisions you shape, and the engineers who get better for having worked with you.

Responsibilities

Own architecture and design decisions on the hardest systems in our portfolio.
Write code, prototype, and debug alongside the teams rather than from a distance.
Review the implementations that carry the most risk, and raise the bar through the work itself.
Find where AI pays off, build it properly, and turn what works into something other teams can reuse.
Work with Tech Leads on scalability, performance, reliability, and technical debt.
Evaluate new technology, prototype it, make a call, and write down the reasoning.
Work with clients and non-engineering stakeholders to turn vague problems into technical direction.

Qualifications

10+ years building and running production software, and still writing code today.
Depth in system design and architecture: scalability, performance, distributed systems, reliability.
A track record of setting technical direction across several teams, or on one large and long-running program.
Quick to find your way around an unfamiliar codebase. Deep in at least one language and comfortable in several.
Hands-on experience in LLM-based systems. Things you have built, not only read about: AI APIs, prompt and context design, and at least one of agents, RAG, or evaluation.
Judgment about when not to build something, when to pay down debt, and when to say no.
The Able to mentor senior engineers and change their minds without formal authority.
Comfort working directly with clients and non-engineering stakeholders.
A habit of following where the field is going.
Production AI systems at scale: evaluation harnesses, guardrails, cost and latency tuning.
Depth in one of our domains: data platforms, cybersecurity, robotics, enterprise systems.
Internal tooling or platform work that made other teams faster.
Open source contributions, conference talks, or technical writing.

Technology in this role

AI: Find where AI pays off, build it properly, and turn what works into something other teams can .
Go: As a forward-thinking consultancy, we go beyond traditional engineering, combining technical excellence with a strategic mindset to deliver transformative solutions for ambitious .
LLM: Hands-on experience in LLM-based .
RAG: Things you have built, not only read about: AI APIs, prompt and context design, and at least one of agents, RAG, or .
CAN: You'll design systems, write code, prototype ideas, debug the failures nobody else can reproduce, review the implementations that matter, and work alongside engineers and Tech Leads wherever deeper expertise is .

Role-specific candidate guide

Preparation notes based on the employer’s stated responsibilities and qualifications.

Understanding the scope. This Lead / Senior Fullstack Engineer position at GRADION is best assessed through the work described in the employer’s posting, rather than the title alone. The available role overview says: “We are looking for a pragmatic, adaptable, and seasoned Lead / Senior Fullstack Engineer to join our engineering team.” Read that statement together with the responsibilities below to understand the likely balance between delivery, coordination and technical decision-making. The role belongs to the software engineering area, but that label is only a guide to the work; the employer’s own requirements remain decisive. Before applying, check the original listing for reporting lines, product or team assignment, employment terms and any details that may have changed since this copy was checked. Where this page says a fact is not specified, treat it as an open question rather than an implied promise.

What the responsibilities signal. The posting specifically names “Own architecture and design decisions on the hardest systems in our portfolio.”; “Write code, prototype, and debug alongside the teams rather than from a distance.”; “Review the implementations that carry the most risk, and raise the bar through the work itself.”. For each duty, identify a project where you performed comparable work and be ready to describe the context, your own contribution, constraints, decisions, and measurable result. Explain how you moved from the initial need to implementation, review, release or operational follow-through, where those stages apply. If the work involved other teams or users, distinguish your decisions from the group’s contribution. Avoid presenting a technology keyword as.

Benefits

Performance bonus of up to 2 months’ salary.
Performance review twice a year, so your growth is recognized and rewarded.
Premium healthcare for you, plus an annual health check.
15 days of annual leave.
Full salary during probation.
Hybrid working for real flexibility.
Monthly Happy Hour and Community Tech activities.
Work on global projects as part of an innovation team that shapes ideas for the hi-tech world.
Diverse training programs to keep you growing.

About GRADION

GRADION builds digital platforms and technology solutions for international clients, with engineering operations in Vietnam.

Employer website

How to apply

Check the original posting to confirm the role is still open before applying.

Check employer posting

Source checked: 2026-09-25