One Click LCA is looking for an Integration Engineer to join our fast-growing team, working to decarbonise buildings and construction, currently responsible for around 40% of global carbon emissions.Why One Click LCAOne Click LCA is a fast-growing and profitable Software-as-a-Service (SaaS) growth company powering the makers of a zero-carbon future. With customers in 170+ countries and a team of international professionals, we make LCA and Environmental Product Declaration (EPD) easy and affordable for the construction industry. It integrates with all the leading design software packages and all environmental databases in the industry and provides over 60 modules for low-carbon design and carbon transparency.You will join a supportive, effective and mission-oriented team in a flexible, friendly work environment. Join us and help us deliver exceptional automated sustainability solutions to our clients!This full-time, permanent role can be performed remotely and is open to candidates based in Europe or as a hybrid role for candidates based in Finland.What you will doDesign and build B2B SaaS integrations between complex enterprise systems and our sustainability platformTurn messy, inconsistent data into structured, validated, regulation-ready modelsBuild reusable connector frameworks, not one-off integrationsDesign two-way sync flows that handle scale, failure and change effectivelyWork directly with product, data, customers and partners to shape how integrations should work, not just how they are implementedUse AI tools as part of your daily workflow to move faster, test mappings, validate schemas and explore edge casesLike most real platforms, parts of our integration layer have evolved over time. Some work involves improving and modernizing existing integrations while building new ones the right way.What we are looking forYou have designed and shipped integrations in B2B SaaS that are used by real customers.You are comfortable modelling complex domains and turning messy real-world data into structured systems.You understand distributed system realities such as idempotency, retries, partial failure and two-way sync.You have implemented oauth2 or similar enterprise authentication flows.You think in platforms and reusable frameworks rather than one-off projects.You default to automation and AI-enabled workflows and are comfortable working in ambiguity to shape solutions.Nice to haveExperience working with integration platforms or middleware toolsExperience integrating ERP, PLM, PIM or other enterprise systemsHow we workSmall, cross-functional teamsHigh ownershipFast iterationsBuild → test → ship → learnInterested?We are eager to receive your application by 19 March 2026. Applications are reviewed on reception, so please apply swiftly.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 +500,000 LCA datasets, and it supports +140 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 +330 people on all continents. Learn more at:
