Tech Lead/Senior Fullstack Engineer - B2B Healthcare Marketplace Platform

LOCATION: HANOI, HCMC
JOB DESCRIPTION
We are looking for a Technical Lead/Senior Software Engineer with strong expertise in system design, backend architecture, and scalable systems, along with hands-on coding, technical leadership, and end-to-end delivery ownership.
Write high-quality code for complex, business-critical components across buyer-facing and seller-facing marketplace platforms.
Design and develop scalable backend services, microservices, APIs, data pipelines, and distributed systems.
Architect internal operations platforms, workflow automation solutions, KYC/compliance checks, and partner integrations.
Make pragmatic technical decisions that balance delivery speed, reliability, security, and long-term scalability.
Lead engineering teams through hands-on guidance, pair programming, and thorough code reviews while establishing engineering standards and fostering a culture of ownership, continuous learning, and quality.
Support hiring, onboarding, and mentoring engineers from junior to senior levels.
Translate product priorities into practical engineering roadmaps and resource plans.
Own features end to end, from system design and development to deployment and post-launch monitoring.
Ensure high availability, performance, and security across distributed systems.
Automate manual business workflows and streamline internal processes.
Continuously improve development practices, including CI/CD pipelines, testing strategies, and DevOps workflows.
REQUIRED SKILLS & EXPERIENCE
7+ years of software engineering experience, including 2+ years in a Senior or Lead role with hands-on coding and technical coordination.
Strong Computer Science fundamentals: data structures, algorithms, distributed systems and software design.
Deep full-stack expertise across:
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ASP.NET Core (C#) for microservices and backend API
Relational database design, performance tuning and optimization
AWS, containerization and Kubernetes in production
Unix/Linux CLI and engineering workflow
RESTful and RPC microservices architecture.
Proven ability to work effectively in fast-paced environments with changing business requirements.
Fluent English with excellent cross-functional communication skills.
NICE TO HAVE
Experience building B2B marketplaces, e-commerce, fintech or healthcare/pharma platforms.
Knowledge of KYC, compliance and data privacy requirements in regulated industries.
Experience with event-driven architecture and message queues (Kafka, RabbitMQ, SQS/SNS).
Infrastructure as Code (Terraform, CloudFormation) and observability tooling (Grafana, Datadog, OpenTelemetry).
Experience scaling an engineering team in a startup or high-growth company.
BENEFITS:
Competitive and negotiable salary (UP TO 60M).
Probation salary is 100% of official salary.
13th-month salary and annual performance review.
Bonus for special occasions each year (Labor Day, National Day, Solar New Year, Lunar New Year).
Project bonus.
Employee's professional certification and training allowances subject to company regulations.
Opportunity to participate in internal training programs on AI, foreign languages, and professional development.
Health Care Insurance.
Annual Health Assessment.
Social, health and unemployment insurance following government policy.
Enjoy company summer trips and other team-building activities held monthly and quarterly.
Professional, creative and dynamic working environment.
Work five days per week with flexible check-in time.