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Researcher&Scientists - INTERNATIONAL DIAGNOSTICS COMPANY LIMITED

INTERNATIONAL DIAGNOSTICS COMPANY LIMITED · Bangkok and its Vicinity

Location
Bangkok and its Vicinity
Salary
Negotiable
Job Type
Full Time
Work Type
Onsite
Education
Master's Degree or Higher
Posted
23/06/2026

Responsibilities

Role Overview
We are seeking Protein Conjugation Scientist to lead our antibody–fluorophore conjugation efforts. This is a key scientific role, central to ensuring the quality, stability, and performance of our diagnostic products. The successful candidate will bring deep technical expertise in bioconjugation chemistry and protein purification, and will drive the design, execution, and optimization of conjugation workflows in our Bangkok R&D laboratory.

Key Responsibilities
1. Design and lead conjugation strategies: Independently plan and execute antibody and protein labeling with fluorescent dyes (e.g., Atto, Alexa, or other advanced markers) using chemistries such as NHS-ester (amine reactive), thiol–maleimide, and click chemistry.

2. Develop and optimize protocols: Establish best practices for conjugation efficiency, reproducibility, and long-term stability of conjugates.

3. Purification & characterization: Apply advanced purification methods, including affinity chromatography, SEC, and ion-exchange, with expertise in FPLC operation and troubleshooting. Characterize conjugates using spectrophotometry, fluorimetry, SDS-PAGE, and analytical chromatography.
4. Scientific interpretation: Evaluate the optical and photophysical properties of dyes to guide conjugate design and product integration.

5. Documentation & compliance: Maintain rigorous experimental documentation aligned with ISO standards. Prepare technical reports and contribute to scientific publications or patent filings when applicable.

6. Collaboration & leadership: Act as the subject-matter expert for conjugation chemistry. Mentor junior scientists and collaborate closely with cross-functional teams (imaging, diagnostics, and quality). Provide consultation to international partners when needed.

Qualifications

1. Master's degree or higher in Medical technology, Medical science, Biology, Biotechnology Biochemistry, or related field.

2. Proven expertise in protein/antibody conjugation with fluorescent dyes and advanced knowledge of bioconjugation chemistries.

3. Several years of hands-on laboratory experience (academic postdoc and/or industry) in protein labeling and purification.

4. Strong command of protein purification methods (affinity, SEC, IEC) and extensive experience with FPLC systems.

5. Solid understanding of fluorescence principles, dye properties, and photophysics relevant to biological applications.

6. Demonstrated ability to innovate, troubleshoot, and independently drive scientific projects from concept to completion.

7. Excellent organizational skills, scientific writing ability, and teamwork.


    Benefits

    • Staff training and development
    • Overtime
    • 5-day work week
    • Social security
    • Health insurance
    • Accident Insurance
    • Flexible working hours
    • Performance/results-based bonus

    About INTERNATIONAL DIAGNOSTICS COMPANY LIMITED

    About International Diagnostics

    International Diagnostics is an innovative medical technology company dedicated to improving disease detection and advancing diagnostic accuracy worldwide. We develop cutting-edge solutions that support pathology and cytology laboratories in identifying rare and abnormal cells — helping clinicians make faster, more reliable decisions for patients.

    Founded as the first spin-off from Mahidol University, we have grown into an international organization headquartered in Singapore, with offices in Thailand, Germany, and the United States. Our global team is guided by our core values: Curiosity, Ambition, Responsibility, and Equality (CARE).

    Behind every technological breakthrough is a strong operational foundation. If you are a structured, proactive professional who enjoys keeping processes efficient and supporting international teams, you will play a key role in our continued success.

    Access our website to learn more: https://www.x-zell.com/

    241/1 ซอย อาคารพิบูลวัฒนา ถนน พระรามหก แขวง พญาไท เขต พญาไท กรุงเทพมหานคร 10400

    พรพรรณ ไทยเจริญ

    0-2087-8499, 08-3061-4468

    http://www.x-zell.com/

    INTERNATIONAL DIAGNOSTICS COMPANY LIMITED
    Researcher&Scientists
    INTERNATIONAL DIAGNOSTICS COMPANY LIMITED
    View all jobs
    Bangkok and its Vicinity
    Full Time
    Master's Degree or Higher
    Negotiable
    2-5 Years
    3d ago
    YOU SAY / HR SAY
    View Review
    What you will do
    Responsibilities
    Role Overview
    We are seeking Protein Conjugation Scientist to lead our antibody–fluorophore conjugation efforts. This is a key scientific role, central to ensuring the quality, stability, and performance of our diagnostic products. The successful candidate will bring deep technical expertise in bioconjugation chemistry and protein purification, and will drive the design, execution, and optimization of conjugation workflows in our Bangkok R&D laboratory.

    Key Responsibilities
    1. Design and lead conjugation strategies: Independently plan and execute antibody and protein labeling with fluorescent dyes (e.g., Atto, Alexa, or other advanced markers) using chemistries such as NHS-ester (amine reactive), thiol–maleimide, and click chemistry.

    2. Develop and optimize protocols: Establish best practices for conjugation efficiency, reproducibility, and long-term stability of conjugates.

    3. Purification & characterization: Apply advanced purification methods, including affinity chromatography, SEC, and ion-exchange, with expertise in FPLC operation and troubleshooting. Characterize conjugates using spectrophotometry, fluorimetry, SDS-PAGE, and analytical chromatography.
    4. Scientific interpretation: Evaluate the optical and photophysical properties of dyes to guide conjugate design and product integration.

    5. Documentation & compliance: Maintain rigorous experimental documentation aligned with ISO standards. Prepare technical reports and contribute to scientific publications or patent filings when applicable.

    6. Collaboration & leadership: Act as the subject-matter expert for conjugation chemistry. Mentor junior scientists and collaborate closely with cross-functional teams (imaging, diagnostics, and quality). Provide consultation to international partners when needed.

    Qualifications

    1. Master's degree or higher in Medical technology, Medical science, Biology, Biotechnology Biochemistry, or related field.

    2. Proven expertise in protein/antibody conjugation with fluorescent dyes and advanced knowledge of bioconjugation chemistries.

    3. Several years of hands-on laboratory experience (academic postdoc and/or industry) in protein labeling and purification.

    4. Strong command of protein purification methods (affinity, SEC, IEC) and extensive experience with FPLC systems.

    5. Solid understanding of fluorescence principles, dye properties, and photophysics relevant to biological applications.

    6. Demonstrated ability to innovate, troubleshoot, and independently drive scientific projects from concept to completion.

    7. Excellent organizational skills, scientific writing ability, and teamwork.


      Welfare
      • Staff training and development
      • Overtime
      • 5-day work week
      • Social security
      • Health insurance
      • Accident Insurance
      • Flexible working hours
      • Performance/results-based bonus

      About Company

      About International Diagnostics

      International Diagnostics is an innovative medical technology company dedicated to improving disease detection and advancing diagnostic accuracy worldwide. We develop cutting-edge solutions that support pathology and cytology laboratories in identifying rare and abnormal cells — helping clinicians make faster, more reliable decisions for patients.

      Founded as the first spin-off from Mahidol University, we have grown into an international organization headquartered in Singapore, with offices in Thailand, Germany, and the United States. Our global team is guided by our core values: Curiosity, Ambition, Responsibility, and Equality (CARE).

      Behind every technological breakthrough is a strong operational foundation. If you are a structured, proactive professional who enjoys keeping processes efficient and supporting international teams, you will play a key role in our continued success.

      Access our website to learn more: https://www.x-zell.com/

      Location

      241/1 ซอย อาคารพิบูลวัฒนา ถนน พระรามหก แขวง พญาไท เขต พญาไท กรุงเทพมหานคร 10400

      Contact person

      พรพรรณ ไทยเจริญ

      Telephone

      0-2087-8499, 08-3061-4468