蒋

Isaac Jiang

Work

About

Resume

Get in Touch

蒋

Isaac Jiang

蒋

Isaac Jiang

Work

About

Resume

Get in Touch

Toastie: Health tracking made quick, easy and informative.

For 3 months, I was appointed PM for Toastie whilst working full-time at DAPPA. Toastie is a startup creating an app focused faster and simpler symptom tracking. I directed a team of 5 UX designers aimed to improve their "Insights" page, navigating diverse team schedules, skill levels, and stakeholder expectations.

For 3 months, I was appointed PM for Toastie whilst working full-time at DAPPA. Toastie is a startup creating an app focused faster and simpler symptom tracking. I directed a team of 5 UX designers aimed to improve their "Insights" page, navigating diverse team schedules, skill levels, and stakeholder expectations.

My role

Product manager, quality assurer, and contributed to UX & UI efforts.

Timeline

Sep 2024 - Nov 2025 (3 months)


Impact

  • Streamlined symptom logging by reducing 52 symptoms → 9 identifiable categories, resulting in a 57% decrease in logging time (from an average of 58 → 25 seconds).

  • + SUS score from (15/100 to 75/100), a massive improvement meaning the designs are “good.”

  • + CSAT score from (2/5 to 4/5), showing users were pretty satisfied with initial design impressions.

  • + NPS score from (1/5 to 3/5), showing some promise in returning users but needing further improvement to solidify key offerings.

My role

Product manager, quality assurer, and contributed to UX & UI efforts.

Timeline

Sep 2024 - Nov 2025 (3 months)


Sep 2024 - Nov 2025

(3 months)


Impact

  • Streamlined symptom logging by reducing 52 unique symptoms → 9 identifiable categories, resulting in a 57% decrease in logging time (from an average of 58 → 25 seconds).

  • +SUS score (15/100 to 75/100), a massive improvement meaning the usability is “good.”

  • +CSAT score (2/5 to 4/5), showing users were pretty satisfied with initial design impressions.

  • +NPS score (1/5 to 3/5), showing promise in returning users but needing further improvement in key offerings.

STRATEGIC APPROACH + TIMELINE STRUCTURE

My PM framework: waterfall + agile structure.

I led with efficiency, clarity, and open communication, balancing logic and empathy to drive progress. I adapted quickly to get things done, and organised weekly client meetings/showcases to gather feedback, hit targets and bridge communication.

I led with efficiency, clarity, and open communication, balancing logic and empathy to drive progress. I adapted quickly to get things done, and organised weekly client meetings/showcases to gather feedback, hit targets and bridge communication.

PROBLEM

People with chronic diseases feel lost, trapped & hopeless, finding symptoms logging a hassle.

Chronic illness patients feel trapped in an endless loop, inconclusive symptom logging and costly treatments that don't work and cause more harm than good. Why do they feel lost, unable to find lasting solutions, and why do medical institutions fail them?

Chronic illness patients feel trapped in an endless loop, inconclusive symptom logging and costly treatments that don't work and cause more harm than good. Why do they feel lost, unable to find lasting solutions, and why do medical institutions fail them?

SOLUTION

Intuitive insights providing a holistic view, enabling data-driven decisions and self-understanding.

I ensured the quality of the final product was meeting expectations, via proper delegation of tasks and QA checkpoints. While also, as the most experienced UI designer, directly coaching and tweaking designs where I could to adhere to professional and accessibility standards.

I ensured the quality of the final product was meeting expectations, via proper delegation of tasks and QA checkpoints. While also, as the most experienced UI designer, directly coaching and tweaking designs where I could to adhere to professional and accessibility standards.

1. Insights hub w/ health overview and alerts

  • Engaging visualisations: Fun, vibrant graphics display insights to boost morale and help create heirarchy.

  • Engaging visualisations: Fun, vibrant graphics display insights to boost morale and help create heirarchy.

  • Actionable alerts: Important, relevant alerts provide guidance and clear next steps. Flags threats.

  • Actionable alerts: Important, relevant alerts provide guidance and clear next steps. Flags threats.

  • Holistic view: Insights formed from past logs and inputted data collated in one place.

  • Holistic view: Insights formed from past logs and inputted data collated in one place.

2. In-depth, yet digestible user data.

  • Understandable visuals: Visualised data and simple summaries for clear trend identification. Fast and easy.

  • Understandable visuals: Visualised data and simple summaries for clear trend identification. Fast and easy.

  • Trends answering the "why": Empowering users with data-backed knowledge for informed decisions and reduced confusion.

  • Trends answering the "why": Empowering users with data-backed knowledge for informed decisions and reduced confusion.

  • Effortless data export: Streamlining doctor consultations for accurate diagnoses and tailored treatments.

  • Effortless data export: Streamlining doctor consultations for accurate diagnoses and tailored treatments.

3. New Features: Actionable Page & Resources

  • Personalised Daily Tasks: Tailored tasks to help manage illness and build healthy habits.

  • Automated Alerts: Timely notifications to keep busy users on track and reduce manual tracking.

  • Streak functionality: Encouraging and helps track daily completion to build consistent habits.

  • Streak functionality: Encouraging and helps track daily completion to build consistent habits.

  • Community Support & Knowledge: Access to peer-shared tips, alternative solutions, relevant studies, and articles to foster a sense of belonging and empower informed health choices.

Fast track your review?

Fast track your review?

Skip Research Fluff
Skip Research Fluff
Skip Research Fluff
DESKTOP RESEARCH + ONLINE ETHNOGRAPHY + LITERATURE REVIEW

Confusing health data, increasing demand for easy, informative apps that facilitate self-care and personalised support.

Our 1st week focused on secondary research. I guided the team's desktop research, directing efforts towards efficiently gathering insights on chronic illness management, and symptom tracking to quickly validate assumptions and inform our interview strategy within the tight timeframe.

Our 1st week focused on secondary research. I guided the team's desktop research, directing efforts towards efficiently gathering insights on chronic illness management, and symptom tracking to quickly validate assumptions and inform our interview strategy within the tight timeframe.

COMPETITOR ANALYSIS

Competitors are good at logging, but lacked any actionable insights.

I oversaw competitive research, allocating tasks and guiding its direction to identify a crucial market gap. The 10 most popular health apps revealed a common shortcoming: while great at logging symptoms, they failed to provide users with detailed information, educate them, or give actionable insights.

I oversaw competitive research, allocating tasks and guiding its direction to identify a crucial market gap. The 10 most popular health apps revealed a common shortcoming: while great at logging symptoms, they failed to provide users with detailed information, educate them, or give actionable insights.

USER INTERVIEWS + AFFINITY MAPPING

Users track symptoms, but find the effort wasted due to a lack of productive outcomes.

We conducted 10 in-depth interviews with participants (aged 20-30) suffering from PCOS, gastrointestinal, or other chronic diseases. We each interviewed 2 people, scheduled via YouCanBook.me, then collectively affinity diagrammed the findings.

We conducted 10 in-depth interviews with participants (aged 20-30) suffering from PCOS, gastrointestinal, or other chronic diseases. We each interviewed 2 people, scheduled via YouCanBook.me, then collectively affinity diagrammed the findings.

MAIN INSIGHT

A guided, data-backed way to manage and understand their own illness is key.

Affinity mapping revealed that users want more control over their illness through clear data visualisation, trend insights, and relevant information to better understand, manage, and communicate with doctors.

Affinity mapping revealed that users want more control over their illness through clear data visualisation, trend insights, and relevant information to better understand, manage, and communicate with doctors.

How might we create a holistic, user-centred solution that has personalised insights w/ guidance on when to seek medical help - all in a simple, time-efficient manner for busy individuals?

How might we create a holistic, user-centred solution that has personalised insights w/ guidance on when to seek medical help - all in a simple, time-efficient manner for busy individuals?

How might we create a holistic, user-centred solution that has personalised insights w/ guidance on when to seek medical help - all in a simple, time-efficient manner for busy individuals?

PERSONA + USER JOURNEY MAP

People seek understanding & support for their condition amidst, a busy schedule.

I assigned teammates with free time to created personas, and user journey maps to focus our design efforts on a specific user type and address key chronic disease pain points, informing future decisions. after they were done they were reviewd by me

I assigned teammates with free time to created personas, and user journey maps to focus our design efforts on a specific user type and address key chronic disease pain points, informing future decisions. after they were done they were reviewd by me

PRIORITISATION MATRIX

Focused on empowering users with educational guidance and digestible, personalised insights with actionable outcomes.

As the 3rd week approached, I facilitated a meeting with the team (later confirmed with clients) to prioritise the pain points, guiding the team to select realistic, high-impact problems achievable within the project deadline, focusing on high-priority, low-effort solutions.

As the 3rd week approached, I facilitated a meeting with the team (later confirmed with clients) to prioritise the pain points, guiding the team to select realistic, high-impact problems achievable within the project deadline, focusing on high-priority, low-effort solutions.

WIREFRAMES

In-person hangout: crazy 8s ideation, retrospective and addressing client feedback of wireframes.

I organised an in-person crazy 8s session with stickers to combine preferred wireframe elements, followed by a team dinner. I allocated tasks by skill: experienced designers handled complex work (wireframes, hi-fi mock-ups), while less experienced members focused on design systems and prototyping. I ensured everyone contributed, guiding rather than dictating.

I organised an in-person crazy 8s session with stickers to combine preferred wireframe elements, followed by a team dinner. I allocated tasks by skill: experienced designers handled complex work (wireframes, hi-fi mock-ups), while less experienced members focused on design systems and prototyping. I ensured everyone contributed, guiding rather than dictating.

IMPROVEMENTS

Make insights useful, actionable, and visually clear.

Based on client feedback and A/B testing, these improvements span from the original client designs to our first hi-fi iteration, and finally to my final QA version. I stepped in for the final polish to ensure client-ready designs, collaborating closely with the team to preserve original design intent.

Based on client feedback and A/B testing, these improvements span from the original client designs to our first hi-fi iteration, and finally to my final QA version. I stepped in for the final polish to ensure client-ready designs, collaborating closely with the team to preserve original design intent.

1. Evolution of Insights Hub

  • Streamlined Navigation: More structure with clear tabs, navbar, and headings for top insights, actionables, and resources eliminate confusion and reduce information overload.

  • Streamlined Navigation: More structure with clear tabs, navbar, and headings for top insights, actionables, and resources eliminate confusion and reduce information overload.

  • Personalised Data Views: Customisable date ranges and visually scannable data (colours, sizing, graphics, font weights) ensure relevant insights.

  • Personalised Data Views: Customisable date ranges and visually scannable data (colours, sizing, graphics, font weights) ensure relevant insights.

  • Proactive Guidance: Actionable alerts for alarming symptoms reduce user stress and uncertainty.

  • Proactive Guidance: Actionable alerts for alarming symptoms reduce user stress and uncertainty.

Original Toastie

Our Hi-fi

My QA

2.. Improved Symptom Analysis Page

  • Condensed data: Paginated tabs to prevent overwhelming users.

  • Structured summaries: Trends use icons and colours for glanceable information.

  • Balanced visual hierarchy: Toning down gradients and excessive colours, creating a more breathable feel.

Original Toastie

Our Hi-fi

My QA

3. Data Export Page

  • Balanced design: Using neutral colours; reduced eye strain and improved heirarchy from excessive orange usage.

  • Simplification: Streamlined data export by condensing elements; reduced cognitive load.

Our Hi-fi

My QA

USABILITY TEST RESULTS

Overall successful testing scores with SUS, CSAT and NPS surveys.

We couldn't conduct more thorough testing for specific metrics due to time and team/interviewee scheduling conflicts. However, we did gather some valuable insights below.

We couldn't conduct more thorough testing for specific metrics due to time and team/interviewee scheduling conflicts. However, we did gather some valuable insights below.

15 → 75/100 AVG SUS

UX/UI issues on the original Toastie insights page made it hard to navigate and overwhelming.

2/5 → 4/5 AVG CSAT

Original insights page was unsatisfactory; new design significantly improved initial user satisfaction.

1/5 → 3/5 AVG NPS

Improved user return, with potential for further gains with more iteration and promising features.

58s → 25s AVG decrease logging time

We drastically condensed and categorised the number of symptoms from 52 down to 9, resulting in a 57% decrease in symptom logging time for users.

CHALLENGES

Adapting to technical and social challenges & constraints.

Delivering this solution demanded elevated social and management skills beyond my previous leadership roles. I'm proud to have successfully completed the project.

Delivering this solution demanded elevated social and management skills beyond my previous leadership roles. I'm proud to have successfully completed the project.

  1. Inexperience & Unstructured Design: I was new to PM, so I could've used more efficient processes, managing skills and provided more direction. Additionally, the team's limited UI skills led to unorthodox design files; I taught best practices, but often had to clean up issues due to slow adoption.

  1. Inexperienced Team & Unstructured Design:
    The team's limited UI skills led to unorthodox design files; I taught best practices, but often had to clean up issues due to slow adoption.

  1. Commitment & Scheduling Challenges: Faced ghosting, shifting schedules, and inconsistent attendance; I filled gaps by taking on more work and used tools like When2meet for scheduling to make management more efficient.

  1. Commitment & Scheduling Challenges:
    Faced ghosting, shifting schedules, and inconsistent attendance; I filled gaps by taking on more work and used tools like When2meet for scheduling.

  1. Communication & Task Management Gaps: Lack of proactive communication and improper Notion deadline use hindered oversight; I fostered open discussion, organised in-person hangouts to build rapport, and provided self-made video tutorials on how to use Notion.

  1. Communication & Task Management Gaps:
    Lack of proactive communication and improper Notion deadline use hindered oversight; I fostered open discussion, organised in-person hangouts to build rapport, and provided self-made video tutorials on how to use Notion.

  1. Balancing my schedule and others' was challenging - I juggled full-time UX/UI work at DAPPA with PM duties for Toastie. Smarter scheduling and being more proactive earlier could of made it easier. Frequent changes in team availability also highlighted the need for more automated scheduling tools (e.g., When2meet.com) to streamline coordination.

  1. Balancing my schedule and others' was challenging -
    I juggled full-time UX/UI work at DAPPA with PM duties for Toastie. Smarter scheduling and being more proactive earlier could of made it easier. Frequent changes in team availability also highlighted the need for more automated scheduling tools (e.g., When2meet.com) to streamline coordination.

CONCLUSIONS + LESSONS LEARNED

What I’d do differently next time.

My first PM role was challenging. I successfully delivered designs, met deadlines, and maintained strong client and team communication. Despite limitations, I led and mentored the team to good results, gaining invaluable lessons that can’t be learnt through a ordinary text book.

My first PM role was challenging. I successfully delivered designs, met deadlines, and maintained strong client and team communication. Despite limitations, I led and mentored the team to good results, gaining invaluable lessons that can’t be learnt through a ordinary text book.

  1. Organise more team bonding/outings - More could've boosted morale and camaraderie. In hindsight, building rapport quickly is crucial for new teams on short timelines, as face-to-face communication simplifies clarity.

  1. Organise more team bonding/outings - More could've boosted morale and camaraderie. In hindsight, building rapport quickly is crucial for new teams on short timelines, as face-to-face communication simplifies clarity.

  1. Allocate more time to testing and interviewee - Small sample size, hindered reliable finding verification and improvement measurement KPIs.

  1. Allocate more time to testing and interviewee -
    Small sample size, hindered reliable finding verification and improvement measurement KPIs.

  1. Be more hands-on - While balancing autonomy is key, earlier direct involvement in UI/UX aspects could have prevented common mistakes, reducing later rework and strengthening product scope.

  1. Be more hands-on -
    While balancing autonomy is key, earlier direct involvement in UI/UX aspects could have prevented common mistakes, reducing later rework and strengthening product scope.

  1. More restrospectives - This was neglected when deadlines were approaching, doing it more consistently can ensure the team is on the same page and that we're all on the same page.

  1. Be more hands-on -
    While balancing autonomy is key, earlier direct involvement in UI/UX aspects could have prevented common mistakes, reducing later rework and strengthening product scope.

Back to Top
Back to Top
Back to Top

Explore other projects.

Virtual Outfit Try-on, Powered by AI
UX/UI Designer
@Dappa
Startup
Virtual Outfit Try-on, Powered by AI
UX/UI Designer
@Dappa
Startup
Virtual Outfit Try-on, Powered by AI
UX/UI Designer
@Dappa
Startup
Optimising Website User Flow
UX/UI Designer
@Uniqlo
Personal Project
Optimising Website User Flow
UX/UI Designer
@Uniqlo
Personal Project
Optimising Website User Flow
UX/UI Designer
@Uniqlo
Personal Project
Let's talk

isaac.jiang01@gmail.com

Navigation
Home
Work
About
Resume
Socials
LinkedIn
Dribbble

Copyright © 2025 Isaac Jiang.

Powered by 96 cups of coffee, thanks for reading!

Let's talk

isaac.jiang01@gmail.com

Navigation
Home
Work
About
Resume
Socials
LinkedIn
Dribbble

Copyright © 2025 Isaac Jiang.

Powered by 96 cups of coffee, thanks for reading!

Let's talk

isaac.jiang01@gmail.com

Navigation
Home
Work
About
Resume
Socials
LinkedIn
Dribbble

Copyright © 2025 Isaac Jiang.

Powered by 96 cups of coffee, thanks for reading!