Finance trainee (part-time) for a Sustainability SaaS
We are looking for a detail-oriented and proactive part-time Finance Trainee to join our effective and supportive team in Helsinki.
In this role, you will support our finance operations, focusing on accounts receivables, including communicating with customers to follow up on outstanding payments. In addition, you will assist with employee expense processing, bank reconciliations, and other related administrative finance tasks to help ensure smooth and accurate financial operations.
Why One Click LCA
One Click LCA's innovative carbon accounting and reduction SaaS platform is utilized in over 170 countries and is experiencing rapid growth. We primarily target the construction industry, where we proudly hold the global leadership position, as well as manufacturing verticals, which are collectively accountable for nearly half of global carbon emissions.
You will join a supportive, effective, and mission-oriented team in a flexible, friendly work environment.
This part-time, fixed-term position is based in Helsinki. The exact working hours and contract duration can be agreed upon depending on the preferences & availability.
What you will do:
- Manage accounts receivables, including initiating collections when required
- Provide clients with support throughout the payment process to ensure smooth and timely transactions
- Allocate payments to corresponding sales invoices and record any exchange rate differences on account statements
- Set up refunds when necessary and ensure they are processed accurately
- Complete supplier forms and questionnaires as needed to support operational and financial workflows
- Assist the team with other related administrative and finance tasks, contributing to the smooth running of day-to-day operations.
What you need:
- Degree in Finance or Accounting (e.g., still studying or recently graduated)
- Strong attention to detail and a diligent approach to administrative tasks
- Excellent communication skills, with the ability to communicate in a clear, direct, timely, and relevant manner both internally and externally
- Experience and understanding of billing and accounts receivable processes, including customer follow-ups and payment tracking
- Knowledge of sales processes and their connection to invoicing and revenue cycles
- Fluency in verbal and written English, as it is our working language
What we offer:
- The opportunity to contribute to a more sustainable and zero-carbon future
- Substantial freedom – with flexible hours and remote working supported
- Technical challenges and substantial responsibility, with the opportunity to witness the direct impact of your work
- Competitive compensation and opportunities for professional development
- A dynamic, friendly, motivated, and diverse team of professionals committed to creating a positive impact on the world
More information:
We are eagerly waiting for your application until 19 October 2025. Applications are reviewed upon receipt, so please apply promptly to be considered.
- Department
- Finance
- Locations
- Helsinki HQ
- Remote status
- Hybrid
How do we do this
We train, equip and support the makers of a zero-carbon future to tackle low-carbon design, planning, manufacturing, and procurement using life-cycle assessment to achieve zero.
This is how we do it:
- We train everyone in the world to life-cycle assessment via One Click LCA Academy for free.
- We provide software tools to decarbonize any project or product anywhere in the world.
- We create free resources and policy tools to power all the makers of zero-carbon future.
- We aim to power one million users by 2035.
How we live our purpose in our work
Maximizing our decarbonization impacts
- We’re training tens of thousands of people for free annually via One Click LCA Academy.
- We provide One Click LCA Planetary, a free embodied carbon software for everyone.
- We author free policy papers and best practice guidelines for governments and businesses.
- Supporting decarbonization outside our direct business
- We invested over 150 000 EUR in the creation of a surplus construction materials marketplace business to reduce site wastage and advanced regulations supporting this activity.
- We have invested 150 000 EUR in the construction of new primary wind power in Finland.
- We donate annually to a number of sustainability NGOs in line with our mission.
Minimizing our internal carbon impacts
- We’re a proud signatory of the World Green Building Council Net Zero commitment and shall achieve zero carbon facilities by 2030.
- We’ve invested in primary wind power generation capacity to power our entire operations.
- We minimize travel emissions by supporting remote work and encouraging public transport.
- We do not serve meat in any company events or dinners and use plant-based milk.
- We operate a paperless business.
Company culture
- We have a very supportive, highly expert, and friendly team of colleagues.
- We leave staff a great deal of autonomy & freedom; you can get done what needs to get done.
- We have a low hierarchy and support an open flow of information.
- Our team is highly international and represents well over 20 nationalities.
- We work on the same mission together with our customers to create a zero-carbon future.
Helsinki HQ
Join a supportive, effective and mission-oriented team
Work with cutting edge tools and a team of world-class professionals and leading organisations to solve one of the world`s biggest challenges - decarbonizing buildings and construction, responsible for 40 % of global carbon emissions.
About One Click LCA
One Click LCA is a Helsinki-based tech company decarbonizing construction and manufacturing with world-leading, easy-to-use, and automated life-cycle assessment (LCA) to calculate and reduce the environmental impacts of building, infrastructure, and renovation projects — as well as construction and other manufactured products. It also enables manufacturers to generate and publish third-party verified EPDs and allows assessment of circularity, life-cycle cost, and soon also biodiversity.
One Click LCA is used in +170 countries. Its decarbonization platform includes a unique global database with +250,000 LCA datasets, and it supports +80 standards and certifications, including LEED, BREEAM, GRESB and other national regulations.
One Click LCA was founded in Finland in 2001 and has a team of +230 people on all continents.
Learn more at: www.oneclicklca.com
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