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Lim Wei Jie
From Singapore 03:21 PM (GMT+08:00)
$25/hr or $50,000/yr
Active 1 hour ago
Member since Aug 2026

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Senior Software engineer

Software Engineer
Available for hire
Years of experience
8+ years
Experience level
Senior
Available for
Full-time, Part-time, Contract, Freelance
Download Resume / CV

I have 8+ years of software engineering experience, with a strong focus on Python, backend systems, cloud applications, and AI. In recent years, I have worked on production AI solutions using LLMs, RAG, AI agents, FastAPI, Django, REST APIs, and data-processing workflows. I also have experience building secure and scalable software in healthcare environments, where reliability, data privacy, and system quality are critical.

I’m currently looking for a Senior Python / AI engineering role where I can build production-grade AI applications and scalable backend services. What sets me apart is the combination of strong traditional software engineering, hands-on AI experience, and full-stack knowledge. I focus not only on making AI features work, but on making them reliable, maintainable, secure, and ready for real users.

Skills

SQL Docker AWS Azure Kubernetes Microservices Natural Language Processing MongoDB PostgreSQL Git CI/CD Machine Learning Generative AI Large Language Models Python Django FastAPI LangChain

Languages

English

Employment History

Senior Healthcare Software Engineer at SleekDigital 2023 - 2026
• Engineered cloud-based healthcare software supporting revenue cycle management, claims processing, patient billing, payer workflows, and payment operations at enterprise scale. • Built and integrated automation-driven services that reduced manual handling across healthcare administrative workflows while preserving auditability and data integrity. • Developed scalable APIs and backend services for high-volume healthcare transactions, with robust validation, error handling, logging, observability, and production support. • Applied secure engineering practices for systems handling PHI, including authentication, authorization, encryption, audit logging, and least-privilege access patterns. • Collaborated with product, QA, platform, and healthcare-domain stakeholders to translate complex payer/provider requirements into maintainable software and CI/CD releases.
Senior Full Stack Engineer at Technology Rivers 2023 - 2023
Promoted from Healthcare Software Engineer to Senior Healthcare Software Engineer. • Led development of HIPAA-aware full-stack healthcare applications and integration services connecting remote patient monitoring devices, cloud platforms, and EHR ecosystems. • Designed scalable frontend and backend architecture, including API layers, healthcare data workflows, FHIR/HL7 integrations, and third-party service connections. • Built and optimized Python-based backend services, React applications, and data processing workflows for secure healthcare platforms. • Strengthened application security with role-based access control (RBAC), encryption, audit logging, secrets management, and secure handling of PHI across the stack. • Mentored engineers, reviewed architecture and code, improved reusable engineering patterns, and supported delivery from requirements through deployment and production troubleshooting.
Frontend Developer at Technology Rivers 2020 - 2023
• Developed responsive healthcare web applications supporting patient engagement, telehealth, remote patient monitoring, clinical workflows, and healthcare data exchange. • Built reusable React components, user interfaces, frontend architecture, and API-driven experiences for healthcare platforms. • Integrated frontend applications with REST APIs, backend services, databases, EHR systems, and third-party healthcare platforms. • Improved user experience, performance, accessibility, and maintainability through modern JavaScript frameworks, component design, and frontend optimization practices. • Collaborated with backend engineers, designers, QA teams, and product stakeholders while contributing to Agile delivery, testing, debugging, and production support.
Backend Developer at Definitive Healthcare 2017 - 2019
• Developed backend services and data-processing workflows for a healthcare commercial intelligence platform covering hospitals, providers, clinical activity, medical markets, and healthcare organizations. • Built REST APIs, backend services, SQL queries, and data models supporting healthcare analytics, reporting, provider-network intelligence, and customer-facing products. • Created backend validation, normalization, and processing logic for healthcare and commercial datasets sourced from multiple systems. • Worked across backend implementation, database optimization, testing, releases, code reviews, and production troubleshooting within an Agile engineering environment.

Education

No education history.

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