Be an Early Applicant
The Role
The Senior Backend Engineer will develop and integrate AI systems for carbon footprint workflows, focusing on reliability and data quality, while collaborating with CTO and other engineers.
Summary Generated by Built In
Location: 100% Remote (CET +/- 1)
Reporting to: CTO
Team: Corporate Carbon Footprint (CCF) / Product Carbon Footprint (PCF) Squad
About Global Changer
Are you tired of working on products you don’t really care about?
Do you want to work on something that has a positive impact on humanity and our planet? Do you like to get stuck in and are you passionate about coding? Then we have a great opportunity for you.
At Global Changer, you will work on a solution with a clear goal: helping companies reduce emissions faster. We focus on one of the biggest levers to fight the climate crisis and work mainly with large organisations.
We are backed by well-known investors (including neosfer, part of the Commerzbank Group, and the former CIO of innogy) and work with renowned customers such as Heraeus, Tchibo and Haniel.
Our goal is to reach as many companies as possible worldwide with our software and contribute meaningfully to reducing emissions. Impact is therefore one of our core values.
About the software
Our product is a SaaS B2B platform that supports companies along their sustainability journey, with a strong focus on carbon accounting (Corporate Carbon Footprint (CCF) and Product Carbon Footprint (PCF)). We use AI to support data-heavy workflows and to generate estimates where data is incomplete, always with the goal of improving data quality over time.
Your role
As a Senior Backend Engineer - AI Agents (m/f/d), you will shape how AI is used in our Corporate Carbon Footprint (CCF) and Product Carbon Footprint (PCF) workflows.
Your focus is on building reliable, production-grade LLM-based systems and integrating them cleanly into our backend architecture. This is not a research role. It’s about making AI systems understandable, reproducible and trustworthy in a data-heavy, audit-relevant product.
You will work closely with the CTO, product management, senior engineers and sustainability experts, combining hands-on implementation with architectural responsibility.
You will work on:
* Designing and implementing agent-based LLM systems (tool calling, orchestration)
* Applying RAG to ground AI outputs in internal data
* Defining evaluation, quality control patterns and uncertainty signals for AI-generated results (e.g. LLM-as-a-judge)
* Combining AI-driven logic with rule-based mechanisms for reproducibility
* Making informed trade-offs between accuracy, cost, latency and reliability in production
You will not be building or training foundation models.
Tasks
* Own the backend services (agents) for AI-driven PCF and CCF workflows
* Implement and evolve agent orchestration, evaluation and quality mechanisms (ML Ops)
* Set technical direction for AI-related backend systems together with the CTO and other senior engineers
* Translate product and domain requirements into robust technical solutions
* Ensure code quality and knowledge sharing through code reviews and collaboration
Selective Technologies we use
* Languages: Golang, Python (FastAPI)
* Agents: Langgraph, Langfuse
* LLMs: self-hosted inference backends with battle-proven state-of-the-art models
* Messaging & Data: NATS, Postgres, Redis
Requirements
Must Haves
* 5+ years of experience in backend software development
* Strong Python skills
* Proven track in agent development in a professional environment
* Strong familiarity with agent frameworks, technologies and techniques (RAG, tool-calling, function-calling, agent design patterns)
* Experience balancing performance, cost and accuracy in production environments
* Fluent in English, clear written and verbal communication (German is a plus)
* You live in the EU (CET ±1) with a valid work permit
* You are passionate about the fight against the climate crisis and creating customer-oriented solutions that deliver real added value
* Startup or scale-up experience
Nice to have
* Experience in data-heavy or audit-relevant domains
* Degree in computer science or a related field
Benefits
* Creating long-lasting software with a positive impact - we are here to stay
* Play a decisive role in shaping our product and corporate culture
* A mission that drives us every day
* Fair compensation (first order of magnitude: around € 70,000 - 80,000 gross depending on experience)
* 28 vacation days and flexible vacation planning (you don't have to plan your entire vacation at the beginning of the year)
* Flexible working hours - family-friendly :)
* 100% remote is possible - work from your preferred location
* Freedom to contribute to the open source community
* Teamevents
Studies show that men apply for jobs if they fulfill around 60% of the criteria on average. Women and other members of marginalized groups, on the other hand, often only apply if they meet every single criterion. So, if you think you have the potential but don't exactly meet every point in the job description, apply anyway. Applicants of all ages are welcome.
Are you the right person to help take our company to the next level?
Then simply apply to us now with your LinkedIn or Xing profile.
We look forward to getting to know you!
Reporting to: CTO
Team: Corporate Carbon Footprint (CCF) / Product Carbon Footprint (PCF) Squad
About Global Changer
Are you tired of working on products you don’t really care about?
Do you want to work on something that has a positive impact on humanity and our planet? Do you like to get stuck in and are you passionate about coding? Then we have a great opportunity for you.
At Global Changer, you will work on a solution with a clear goal: helping companies reduce emissions faster. We focus on one of the biggest levers to fight the climate crisis and work mainly with large organisations.
We are backed by well-known investors (including neosfer, part of the Commerzbank Group, and the former CIO of innogy) and work with renowned customers such as Heraeus, Tchibo and Haniel.
Our goal is to reach as many companies as possible worldwide with our software and contribute meaningfully to reducing emissions. Impact is therefore one of our core values.
About the software
Our product is a SaaS B2B platform that supports companies along their sustainability journey, with a strong focus on carbon accounting (Corporate Carbon Footprint (CCF) and Product Carbon Footprint (PCF)). We use AI to support data-heavy workflows and to generate estimates where data is incomplete, always with the goal of improving data quality over time.
Your role
As a Senior Backend Engineer - AI Agents (m/f/d), you will shape how AI is used in our Corporate Carbon Footprint (CCF) and Product Carbon Footprint (PCF) workflows.
Your focus is on building reliable, production-grade LLM-based systems and integrating them cleanly into our backend architecture. This is not a research role. It’s about making AI systems understandable, reproducible and trustworthy in a data-heavy, audit-relevant product.
You will work closely with the CTO, product management, senior engineers and sustainability experts, combining hands-on implementation with architectural responsibility.
You will work on:
* Designing and implementing agent-based LLM systems (tool calling, orchestration)
* Applying RAG to ground AI outputs in internal data
* Defining evaluation, quality control patterns and uncertainty signals for AI-generated results (e.g. LLM-as-a-judge)
* Combining AI-driven logic with rule-based mechanisms for reproducibility
* Making informed trade-offs between accuracy, cost, latency and reliability in production
You will not be building or training foundation models.
Tasks
* Own the backend services (agents) for AI-driven PCF and CCF workflows
* Implement and evolve agent orchestration, evaluation and quality mechanisms (ML Ops)
* Set technical direction for AI-related backend systems together with the CTO and other senior engineers
* Translate product and domain requirements into robust technical solutions
* Ensure code quality and knowledge sharing through code reviews and collaboration
Selective Technologies we use
* Languages: Golang, Python (FastAPI)
* Agents: Langgraph, Langfuse
* LLMs: self-hosted inference backends with battle-proven state-of-the-art models
* Messaging & Data: NATS, Postgres, Redis
Requirements
Must Haves
* 5+ years of experience in backend software development
* Strong Python skills
* Proven track in agent development in a professional environment
* Strong familiarity with agent frameworks, technologies and techniques (RAG, tool-calling, function-calling, agent design patterns)
* Experience balancing performance, cost and accuracy in production environments
* Fluent in English, clear written and verbal communication (German is a plus)
* You live in the EU (CET ±1) with a valid work permit
* You are passionate about the fight against the climate crisis and creating customer-oriented solutions that deliver real added value
* Startup or scale-up experience
Nice to have
* Experience in data-heavy or audit-relevant domains
* Degree in computer science or a related field
Benefits
* Creating long-lasting software with a positive impact - we are here to stay
* Play a decisive role in shaping our product and corporate culture
* A mission that drives us every day
* Fair compensation (first order of magnitude: around € 70,000 - 80,000 gross depending on experience)
* 28 vacation days and flexible vacation planning (you don't have to plan your entire vacation at the beginning of the year)
* Flexible working hours - family-friendly :)
* 100% remote is possible - work from your preferred location
* Freedom to contribute to the open source community
* Teamevents
Studies show that men apply for jobs if they fulfill around 60% of the criteria on average. Women and other members of marginalized groups, on the other hand, often only apply if they meet every single criterion. So, if you think you have the potential but don't exactly meet every point in the job description, apply anyway. Applicants of all ages are welcome.
Are you the right person to help take our company to the next level?
Then simply apply to us now with your LinkedIn or Xing profile.
We look forward to getting to know you!
Skills Required
- 5+ years of experience in backend software development
- Strong Python skills
- Proven track in agent development in a professional environment
- Strong familiarity with agent frameworks, technologies and techniques
- Experience balancing performance, cost and accuracy in production environments
- Fluent in English, clear written and verbal communication
- You live in the EU (CET ±1) with a valid work permit
- Passionate about the fight against the climate crisis
- Startup or scale-up experience
- Experience in data-heavy or audit-relevant domains
- Degree in computer science or a related field
Am I A Good Fit?
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.
Success! Refresh the page to see how your skills align with this role.
The Company
What We Do
Global Changer provides a decarbonization platform and AI-powered sustainability software to help companies manage carbon emissions, achieve net-zero targets, and streamline sustainability efforts.
