Mid/Senior Golang Developer

DAFTCODE; Warszawa; On-site; PLN 180,000 - 260,000; Full time

Job summary

Daftcode in Warsaw, Poland is seeking a Mid/Senior Golang Developer to join our fintech and crypto-focused teams. You will design and develop applications, mentor teammates, and uphold architectural quality.

We value 4+ years of backend experience, 2+ years in Go, an AI-first mindset, and familiarity with Docker, Kubernetes, PostgreSQL, SQL, and CI/CD. Banking/Fintech exposure is a plus.

Qualifications

• At least 4 years of hands-on experience with backend development (any language).
• At least 2 years of commercial experience with Go.
• An AI-first mindset — you not only use AI tools in daily work, but also create flows and automate tasks with them.
• Experience in the banking industry or Fintech products
• Understanding business needs
• Knowledge of HTTP and REST
• Nice to Have : Familiarity with blockchain topics
• Experience integrating LLMs or AI APIs into products
• Experience with Docker and k8s
• Knowledge of CI/CD processes and deployment

Responsibilities

• Designing and developing applications
• Taking care of the technical quality of the application and system architecture
• Optimizing the application for performance
• Writing unit/integration tests
• Being a mentor and participating in code reviews

Skills

Go

Backend development

HTTP/REST

AI tools usage

Code reviews

Mentoring

Unit tests

Problem solving

Analytical mindset

Tools

Docker

Kubernetes

CI/CD

PostgreSQL

SQL

Job description

Daftcode is a technology group driven by an analytical approach to business. As a venture builder, it creates, scales and invests in startups in such areas as: Deep Tech, FinTech, InsurTech, Cyber Security and Blockchain, among others. The company offers its startups tech and business support, which facilitates market launch and growth of new companies. Daftcode works with individual startup founders, early-stage projects and existing startups looking for financing rounds or support in commercialization and business scaling.

We’re looking for a Mid/Senior Golang Developer to join one of our technical teams around Fintech and crypto products.

Your responsibilities:

• Designing and developing applications
• Taking care of the technical quality of the application and system architecture
• Optimizing the application for performance
• Writing unit/integration tests
• Being a mentor and participating in code reviews
• At least 4 years of hands‑on experience with backend development (any language)
• At least 2 years of commercial experience with Go
• An AI-first mindset — you not only use AI tools (e.g. Copilot, Cursor, Claude) in your daily work, but also create flows and automate your tasks with them
• Experience in the banking industry or Fintech products
• Understanding business needs
• Experience with relational databases (Postgresql is preferred)
• Knowledge of HTTP and RESTNice to Have :
• Familiarity with blockchain related topics
• Experience integrating LLMs or AI APIs into products
• Experience with Docker and k8s
• Knowledge of CI/CD processes and deployment

Application

On some positions we need additional verification. We might send you a task to solve.

Interview

Let’s talk about your experience & expectations. You will also solve problems of the type you’ll work on.

Results

Now you can join our team and start a great adventure!