Careers

Build the next stage of clean hydrogen with us

Design, manufacturing, operating data and field support are connected within one team. You can follow the full path from an engineering decision to a product used at a customer site.

How we work

How we work

01

From design to field service

The engineers who design and build our stacks also support them at customer sites. Operating results feed directly into the next design.

02

Connecting development and production

Electrodes, stacks and systems are built and tested at our site in Dongtan, Hwaseong, and business development and customer engineering sit in the same building. The KAIST Munji Campus address in Daejeon is our registered office.

03

Products used by customers worldwide

We supply more than 60 customers across 12 countries, from university laboratories to global companies. You can see how the products you build are used.

Open positions

Open positions

B2B Sales

Full-timeBachelor's degree or aboveOpen to all experience levelsDongtan, Hwaseong, KoreaBusiness team
Posted 2026.08.10

This is not spec-pushing. You start from the customer's application and site conditions, then shape the right configuration together with the engineers who designed the product. Counterparts range from research labs to system integrators and overseas resellers, and each needs a different answer.

What you will do

  • Take enquiries, capture the application, required output and site conditions first, then come back with a fitting configuration and the right documents
  • Find leads in Korea and overseas and run cold outreach (email sequences and LinkedIn)
  • Carry each opportunity from consultation through quotation to contract terms
  • Recruit and manage overseas resellers and partners, and cover exhibitions and conferences
  • Bring the customer's real blockers back to engineering so products and documents improve
  • Keep Q&A records and CRM current so the next person never rewrites the same explanation

Requirements

  • Able to read, write and hold technical discussions in English
  • Willing to say what you do not know. You will have to separate what we have verified from what we have not
  • A habit of looking for the real problem behind the customer's question

Nice to have

  • Experience in B2B or technical sales
  • Background in hydrogen, fuel cells, electrochemistry or energy equipment
  • Experience in overseas sales or export operations (Incoterms, payment, shipping documents)
  • Engineering or science degree

Hiring process Application review → Phone interview → On-site interview

Compensation Per internal pay scale

Apply for this roleinfo@hydroxpand.com

Electrolyzer Stack and System Production

Full-timeNo specific degree requiredOpen to all experience levelsDongtan, Hwaseong, KoreaBusiness team
Posted 2026.08.10

Assemble and test AEM water-electrolysis stacks and systems in house, from electrode and membrane stacking through stack assembly, system piping and wiring, to pre-shipment performance testing.

What you will do

  • Electrode and membrane stacking, stack assembly and torque control
  • System piping, electrical assembly and wiring
  • Pre-shipment performance and leak testing with recorded results
  • Incoming material checks and inventory management
  • Following work standards and proposing improvements

Requirements

  • Care and consistency in hands-on assembly work
  • Able to record and share work results

Nice to have

  • Experience in mechanical or electrical assembly, or on a production floor
  • Experience with piping and fittings, or electrical wiring
  • Experience producing energy equipment such as hydrogen, fuel cell or battery systems
  • Forklift or electrical certifications

Hiring process Application review → Phone interview → On-site interview

Compensation Per internal pay scale

Apply for this roleinfo@hydroxpand.com

Closed positions

  • Balance of Plant (BoP) Engineer · posted 2025.08.21
Open application

If no current role fits

You can still apply without an open posting. Tell us what you have worked on, what you want to do next and which products interest you. Letting us know whether you prefer electrodes, stacks, systems or controls helps us review your application more quickly.

Open applicationAbout the companyOur technology

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