Sadi Hossain
Email Sadi

Service Designer & UX Designer · Helsinki

Bring your services closer to the people who need them.

I help product leaders turn research into coherent service direction and production-ready UX for complex workflows.

Tell me about a product or service challenge See selected work

Where I help

When to bring me in

I bring research, service design, and detailed UX together when growth, complexity, or uncertainty has made a service hard to understand or improve.

Your products share a portfolio, but not an experience.

Products brought together through acquisitions often retain different navigation models, interaction patterns, and product histories, which makes them feel like separate businesses to the people using them. I help define a shared experience direction, decide what should become common, and create reusable foundations without erasing differences that serve distinct users and workflows.

Explore related workOmaPosti Pro: the new brand became part of how the product worksRoima Intelligence: an adopted shared experience guide

Your team is building the service without a clear understanding of user needs.

When product decisions rely mostly on internal assumptions, it is difficult to know what already works, what gets in the way, which features matter most, or how people expect them to behave. I help product teams speak with users, turn what they learn into clear priorities, and test feature concepts before the team commits to building them.

Explore related workPosti Sustainable Packaging Venture: connecting research to testable directionsConnected laboratory service concept: concept continuation, not realised impact

Selected work

What that looks like in practice:

Four engagements where research, shared direction, and detailed UX informed important product and service decisions.

Engineering platform

Complex operational UX

A staged direction for complex document work

I researched how professional users create and reuse documents, turned the findings into a staged prototype, and tested it with small samples to give product and development teams a clearer basis for implementation decisions.

  • UX design
  • User research
  • Prototyping
View the Engineering platform Case Study
My role
UX/UI Designer
Proof state
Small-sample prototype validation, not production impact. Two participants rated the proposed staged flow highly for clarity and confidence; the result is directional only.
Posti Sustainable Packaging Venture

Validated direction

From broad sustainability questions to testable service directions

A seven-person venture team explored how Posti could help businesses reduce packaging waste. As Product Lead and Lead Designer, I helped map the end-to-end packaging journey, synthesise research, and shape three service directions around eliminating, reusing, and reducing packaging. We then turned venture goals into hypotheses, weekly experiments, success criteria, and a documented body of learning.

  • Service design
  • Product discovery
  • User research
View the Posti Sustainable Packaging Venture Case Study
My role
Product Lead & Lead Designer
Proof state
Team operating cadence and a completed pilot, not commercial or environmental impact. Research involving 118 companies informed the service directions, the team used the experiment system across multiple sprints, and Boxless was piloted.
New York Times R&D · Eclipse

Complex operational UX

Helping journalists keep reporting while critical video transfers

As UX/UI Designer, I designed mobile workflows for transferring large video files over unreliable connections without interrupting reporting. The work covered proxy creation, parallel and background uploads, visible status, annotation, batch captioning, and recovery. A high-fidelity prototype aligned the mobile developer and stakeholders around the direction.

  • UX design
  • UI design
  • Prototyping
View the NYT R&D — Eclipse Case Study
My role
UX/UI Designer
Proof state
Field-tested direction, not a production outcome or Sadi-only result. Field testing informed proxy-first transfer and reliability decisions; the prototype aligned design and development.

More selected work

Roima Intelligence

Portfolio coherence

Several products shared a portfolio, but not an experience

As UX Designer, I led the UX work to define what several products should share across page structures, interaction patterns, and guidance. Working with a colleague focused on visual design, I helped turn those foundations into the adopted One Roima Experience Guide.

Inspect this compact Case Study
My role
UX Designer
Proof state
Adopted shared experience guide. The guide clarified collaboration between UX, product, and development; Roima later built an internal UX team around the approach.
Connected laboratory service concept

Validated direction

A connected product idea needed to become a service grounded in laboratory work

As Service Designer, I worked with a business designer, technical architect, and illustrator to observe the pipetting workflow and connect its challenges to five use cases and three core scenarios. Together, we shaped a connected service concept and translated it into a business plan and roadmap.

Inspect this compact Case Study
My role
Service Designer
Proof state
Concept continuation, not realised impact. After board consideration, the client formed an internal team to continue developing the concept.

About Sadi

A hands-on design partner for difficult product and service decisions

For a focused engagement, I embed with one team from direction through detailed design. When related products or services need to become more coherent, I work across teams to align decisions and create shared foundations. I usually work with teams for several months or on an ongoing basis, staying close enough to the work to maintain momentum and quality.

Helsinki · Finnish and English · Hybrid preferred

Start a conversation

What has become fragmented, difficult to use, or hard to decide?

Tell me briefly about the situation. I’ll reply with an initial perspective and a sensible next step.

Email Sadi