Full-Stack Developer

OpsArmy; Kraków; On-site; PLN 120,000 - 190,000; Full time

Job summary

OpsArmy in Kraków is seeking a hungry, scrappy Full-Stack Developer to build, solve problems, and move quickly in a startup environment. This hands-on role expects ownership and the ability to work with limited direction, wearing multiple hats and learning new tech as needed.

You will develop and integrate front-end and back-end features, ship reliable code, and collaborate to turn product requirements into practical solutions while advancing product performance and scalability.

Qualifications

• Strong experience as a Full-Stack Software Engineer/Developer.
• Experience building and maintaining production applications.
• Strong understanding of both front-end and back-end development.
• Ability to work independently and take ownership of technical tasks.

Responsibilities

• Build, maintain, and improve full-stack web applications.
• Develop and integrate front-end and back-end features
• Work closely with the team to turn product requirements into working solutions
• Troubleshoot, debug, and resolve technical issues
• Write clean, maintainable, and scalable code
• Take ownership of projects and features from development through implementation
• Quickly research and learn new technologies, tools, and frameworks as needed
• Identify problems proactively and find practical solutions
• Work in a fast-pa ced environment where priorities may change quickly
• Collaborate with other team members to improve product functionality and performance

Skills

Full-Stack Software Engineer

Front-end & Back-end development

Ownership & independence

English communication

Problem-solving

Tools

React

Node.js

API design

Job description

About the Role

We are looking for a hungry, scrappy Full-Stack Developer who thrives in a startup environment and is excited to build, solve problems, and move quickly.

This is a hands‑on role for someone who can work independently, figure things out, and take ownership without needing everything mapped out for them. You should be comfortable wearing multiple hats, learning new technologies when needed, and finding practical solutions when there isn't an obvious answer.

We're especially interested in engineers with startup experience who are motivated by building products, solving real problems, and making an impact.

Key Responsibilities

• Build, maintain, and improve full-stack web applications
• Develop and integrate front-end and back-end features
• Work closely with the team to turn product requirements into working solutions
• Troubleshoot, debug, and resolve technical issues
• Write clean, maintainable, and scalable code
• Take ownership of projects and features from development through implementation
• Quickly research and learn new technologies, tools, and frameworks as needed
• Identify problems proactively and find practical solutions
• Work in a fast‑paced environment where priorities may change quickly
• Collaborate with other team members to improve product functionality and performance

Required Qualifications

• Strong experience as a Full-Stack Software Engineer / Developer
• Experience building and maintaining production applications
• Strong understanding of both front-end and back-end development
• Ability to work independently and take ownership of technical tasks
• Strong problem‑solving and debugging skills
• Comfortable working with ambiguity and figuring things out independently
• Strong English communication skills
• Ability and willingness to learn new technologies quickly
• Strong sense of urgency and ownership

Preferred Experience

• Previous experience working at a startup or fast‑growing company
• Experience working on products from early‑stage development through launch
• Experience working in small, lean engineering teams
• Experience with modern web development frameworks and technologies
• Experience working remotely with distributed teams
• A track record of taking initiative beyond assigned tasks

What We're Looking For

We're not just looking for someone who can code. We're looking for someone who is:

• Hungry — motivated to grow and take on bigger challenges
• Scrappy — resourceful and able to figure things out without constant direction
• Fast-learning — willing to learn whatever is needed to solve a problem
• Hands‑on — comfortable jumping into unfamiliar code or problems
• Proactive — sees problems and opportunities instead of waiting to be told what to do
• Startup‑minded — comfortable with changing priorities and limited hand‑holding