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Urgent! Senior Backend Engineer (Python) Job Opening In Kraków – Now Hiring SCALEWORKS SP Z O O

Senior Backend Engineer (Python)



Job description

Grassroots Carbon Public Benefit LLC offers reliable, fast, and flexible nature-based soil carbon storage solutions to companies aiming to reduce their carbon footprint.

We bring together landowners who store carbon in their grassland’s soil with buyers willing to purchase measured and independently certified soil carbon storage.

Across America’s hundreds of millions of acres of grazing lands, Grassroots Carbon pays ranchers and farmers to restore soil health and for the measured increase in soil carbon.


Leading companies like Marathon Oil and Shopify trust Grassroots Carbon to help them to reach their carbon reduction goals.

Grassroots carbon has developed a rapidly growing portfolio of companies interested in procuring carbon credits.

Our rancher network covers over 6 million acres of US grasslands, enabling Grassroots Carbon to deliver millions of tons of CO2 storage every year.


 


About PastureMap


PastureMap helps ranchers plan grazing, improve soil health, and track carbon outcomes.

We build tools for livestock and grazing management, forage monitoring, weather-aware plans, and sustainability reporting.

If you want your code to make the land healthier and ranching more profitable, you’ll feel at home here.


The role


We’re hiring a Senior Backend Engineer to own critical services across our FastAPI/Django platform.

You’ll design and scale APIs, data models, and background jobs that power ranch operations, offline-first sync, and environmental reporting.

You’ll collaborate with product, data, frontend and carbon science team to ship reliable features fast.


 

Requirements

You’ll be great if you have




  • 6+ years professional backend experience (or equivalent impact).




  • Strong Python skills with FastAPI and/or Django in production.




  • Deep SQL chops with PostgreSQL (query tuning, indexes, migrations, transactional integrity).




  • Asynchronous Python (async/await), task queues (Celery/RQ), event systems.




  • Experience building distributed, containerized systems on AWS with Terraform.




  • Proficiency with Redis (caching, queues, locks) and designing idempotent background jobs.




  • Ownership mindset: you ship, monitor, and iterate; you write tests and docs by default.




  • Excellent collaboration and product sense.




Nice to have




  • Geospatial experience: PostGIS, Shapely/GEOS, GDAL/PROJ; tiling/geometry operations.




  • Data/compute: Polars/Pandas, NumPy; report generation (PDF/CSV pipelines).




  • Security & compliance best practices (authN/Z, secrets, least privilege).




  • Offline-first sync, CRDTs, or merge/conflict-resolution patterns for mobile clients.




  • Observability: structured logging, metrics, tracing; SLOs.



Responsibilities

What you’ll do




  • Design and scale APIs (REST/JSON) in Python 3.10+ using FastAPI and understand Django where appropriate.




  • Model complex domain data (livestock, paddocks, seasons, grazing events) with PostgreSQL (+ SQLAlchemy, PostGIS must-to-have).




  • Build robust background processing (task queues, scheduling, idempotency, retries) and conflict-free offline sync for mobile clients.




  • Drive performance, security, and reliability: profiling, caching (Redis), rate limiting, pagination, observability (logs/metrics/traces).




  • Own infrastructure-as-code with Terraform; containerize with Docker and deploy on AWS (ECS, S3, VPC).




  • Maintain clean CI/CD pipelines (GitHub Workflows), code quality (type hints, pytest), and documentation.




  • Partner with product to scope pragmatic solutions; mentor peers and review code.




  • Contribute to sustainability features (forage & ADA calculations, grazing plans, carbon/soil reporting, science team data collection).




Our stack (you’ll touch most of this)




  • Python 3.10+, FastAPI, Django




  • PostgreSQL (SQLAlchemy/ Alembic), Redis




  • AWS (ECS, S3, CloudWatch, VPC), Terraform




  • Docker, Git




  • CI/CD: GitHub Workflows / Actions



Benefits


  • Development fund of 3k PLN per year per head

  • Flexibility in choosing the type of contract

  • Paid holiday

  • Private healthcare (Luxmed via Warta)

  • Sports card (Multisport)

  • Free English classes

  • Team building and socializing events

  • Competitive salary

  • Udemy access etc.


Required Skill Profession

Computer Occupations



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