Senior Software Engineer (Python) @ CodiLime

CodiLime; Polska; Remote; PLN 240,000 - 380,000; Full time

Benefits offered by this job

Flexible working hours

Training budget

Private healthcare

International projects

Job summary

CodiLime is seeking a Senior Software Engineer to join our AI-first backend team. You will implement integrations to third-party networks, build discovery agents, and deliver data through a robust ingestion layer. The role emphasizes Python, AI-assisted development, and scalable cloud infrastructure.

You will work in a distributed Europe/US team, with flexibility for remote, hybrid, or office work, and contribute to unit and E2E testing in a fast-paced startup-like environment.

Qualifications

• Extensive Python experience with production-grade software.
• Hands-on use of AI coding tools in daily workflow.
• Experience building/integrating REST APIs and gRPC is a plus.

Responsibilities

• Designing, building, and maintaining integrations that connect the platform to third-party network systems and controllers.
• Developing discovery agents/workers that securely connect to customer infrastructure and extract device, interface, and topology data.
• Building and maintaining the services and APIs that deliver discovered data into the platform's declarative ingestion layer.
• Writing and maintaining unit tests (pytest) and contributing to E2E test automation (Playwright, running in Docker Compose via CI).
• Exploring and applying AI-assisted engineering practices to speed up development and testing.
• Collaborating closely with a small, cross-functional engineering team.
• Proposing and helping ship ideas for platform improvements beyond core integration work.
• Contributing to architecture and design decisions as integrations scale to new vendors.

Skills

Python

Claude Code

REST APIs

gRPC

pytest

Docker

Docker Compose

Kubernetes

Networking basics

PostgreSQL

Grafana

Prometheus

GitHub Actions

AWS

English

Tools

Go

MQTT

FastAPI

Swagger

Postman

Playwright

Ansible

Job description

As a Senior Software Engineer, you must meet the following criteria:

• Strong professional experience with Python
• Hands-on, everyday use of AI coding tools (ideally Claude Code) in your engineering workflow
• Experience building and maintaining integrations or APIs (REST)
• Experience with gRPC is a strong plus
• Solid unit testing experience, ideally with pytest
• Fluency and experience with Docker, Docker Compose
• Experience with Kubernetes
• Working understanding of core networking concepts: IP vs MAC, VLANs, VRFs, DNS, BGP, ACLs
• Experience with relational databases (PostgreSQL/SQL)
• Comfortable in a startup-like, fast-paced, proactive environment
• Experience with monitoring tools (e.g. Grafana and/or Prometheus)
• CI/CD experience (ideally GitHub Actions)
• Experience with Cloud computing (Ideally AWS, e.g. EC2, S3, EKS)
• Good knowledge of English (minimum C1 level)

Beyond the criteria above, we would appreciate the following nice-to-haves:

• Experience with Go
• Experience with MQTT
• Familiarity with FastAPI
• Experience with Swagger and/or Postman
• Experience with Playwright or other E2E testing frameworks
• Experience with Ansible

Get to know us better

CodiLime is a software and network engineering industry expert and the first-choice service partner for top global networking hardware providers, software providers and telecoms. We create proofs-of-concept, help our clients build new products, nurture existing ones and provide services in production environments. Our clients include both tech startups and big players in various industries and geographic locations (US, Japan, Israel, Europe).

While no longer a startup - we have 250+ people on board and have been operating since 2011 we’ve kept our people-oriented culture. Our values are simple:

• Act to deliver.
• Disrupt to grow.
• Team up to win.

The project and the team

You will join the team behind a leading network source-of-truth (NSoT) platform, used by thousands of organizations - from fast-growing tech companies to Fortune 500 enterprises - to model, document, and automate their network infrastructure.

CodiLime engineers work within the platform's Assurance & Integrations area, building and extending the integrations that connect the platform to third-party network systems and controllers - such as Cisco Meraki, VMware vCenter, Juniper Mist, and Infoblox. These integrations run as lightweight discovery agents that securely connect to a customer's infrastructure, continuously identifying devices, interfaces, and the relationships between them. The discovered data is then delivered through the platform's declarative data ingestion API.

The platform is built AI-first, with its own Claude Code agent skills and MCP server, and that mindset carries over to how the team works: AI-assisted development is actively cultivated day to day to help the team move fast and consistently land high-quality results.

The scale is significant - some of the platform's largest customers manage hundreds of thousands of devices, each with multiple interfaces, across globally distributed environments. As the integration ecosystem keeps expanding to new vendors and use cases, the team is growing, and we're looking for another Senior Software Engineer to help build what's next.

Technology stack

• Small, cross-functional team of software engineers who share strong ownership of code quality (unit and E2E tests)
• AI tools are part of the daily workflow, including AI-assisted test writing and internal data/feed management tooling
• This is a backend-focused role
• Startup-like vibe: proactive, ownership-driven, fast-paced
• Distributed team across Europe and US

We work on multiple interesting projects at a time, so it may happen that we’ll invite you to an interview for another project if we see that your competencies and profile are well suited for it.

More reasons to join us

• Flexible working hours and approach to work: fully remotely, in the office or hybrid
• Professional growth supported by internal training sessions and a training budget
• Solid onboarding with a hands-on approach to give you an easy start
• A great atmosphere among professionals who are passionate about their work
• The ability to change the project you work on

• Designing, building, and maintaining integrations that connect the platform to third-party network systems and controllers
• Developing discovery agents/workers that securely connect to customer infrastructure and extract device, interface, and topology data
• Building and maintaining the services and APIs that deliver discovered data into the platform's declarative ingestion layer
• Writing and maintaining unit tests (pytest) and contributing to E2E test automation (Playwright, running in Docker Compose via CI)
• Exploring and applying AI-assisted engineering practices - such as interactive, Claude Code-driven testing flows - to make development and testing faster and more reliable
• Collaborating closely with a small, cross-functional engineering team
• Proposing and helping ship your own ideas for improving the platform, beyond your core integration work
• Contributing to architecture and design decisions as the integrations platform scales to new vendors and larger deployments
• Writing clean, maintainable, well-tested code and participating in code reviews

Requirements

Python, AI, Claude Code, REST, Docker, Docker Compose, Kubernetes, IP vs MAC, VLAN, VRF, DNS, BGP, ACL, PostgreSQL, SQL, Grafana, Prometheus, CI/CD, GitHub Actions, AWS, EC2, S3, EKS, gRPC, Go, MQTT, FastAPI, Swagger, Postman, Playwright, E2E Testing frameworks, Ansible

Additionally

• Sport subscription
• Training budget
• Private healthcare
• Flat structure
• Small teams
• International projects
• Masterclazz training
• Free coffee
• Bike parking
• Playroom
• Free beverages
• Free lunch
• In-house trainings
• Modern office
• No dress code