Full Stack Engineer

Solvedex LLC.; Polska; Hybrid; PLN 120,000 - 240,000; Full time

Benefits offered by this job

Job summary

Solvedex LLC is seeking a Mid to Senior Full Stack Developer to join a remote-first team building an advanced analytics and payments platform. You will own end-to-end features across frontend, backend, and production infrastructure.

Ideal candidates have 4+ years in full-stack roles, strong fundamentals, and experience with multiple languages; familiarity with Node.js, TypeScript, React, Docker, and cloud platforms is a plus. Excellent English communication is essential.

Qualifications

• Bachelor’s degree in Computer Science, Computer Engineering, or another STEM field (or equivalent practical experience).
• 4+ years of professional experience in full-stack or generalist software engineering roles.
• 4+ years of experience working on production systems used by real users.
• Experience contributing meaningfully to complex, production-grade systems.
• Experience working across backend, frontend, and infrastructure environments.
• Strong programming fundamentals and ability to reason about systems beyond a single language or framework.
• Proven ability to debug complex issues in unfamiliar codebases.
• Solid understanding of system design, data modeling, and API design.
• Experience with multiple languages such as C/C++, Java, Go, etc.

Responsibilities

• Own and develop full-stack functionality from problem definition through production deployment and iteration.
• Design, implement, and maintain backend services and APIs supporting analytics and payment workflows.
• Build and evolve frontend applications with a focus on performance, correctness, and maintainability.
• Take responsibility for production systems, including diagnosing and fixing production bugs and incidents.
• Make pragmatic architectural choices under real-world constraints.
• Integrate and maintain third-party services such as payment providers.
• Work with cloud infrastructure and deployments without extensive handholding.
• Review code and designs with clarity, simplicity, and long-term ownership.
• Collaborate with product and engineering peers to deliver measurable business value.

Skills

Distributed systems

System design

Debugging complex code

English fluency

Problem solving

Education

Bachelor’s degree in CS/Engineering or equivalent

Tools

Node.js

TypeScript

React

Docker

Cloud platforms

Kubernetes

Terraform

Job description

At Solvedex we're looking for a Full Stack Engineer to join our team.

About Us
Solvedex reshapes the future of tech talent through fractional technology leadership. We provide experienced, pre-vetted leaders who integrate seamlessly to guide strategy, execution, and growth—handling alignment and oversight so organizations can stay focused on innovation

About the Role

We’re looking for a Mid to Senior Full Stack Developer to join a remote-first team building an advanced analytics and payments platform.

This role requires an engineer who is comfortable working across the entire stack—from frontend interfaces to backend services and production infrastructure—and who understands that being “full stack” means owning systems end-to-end, not just implementing features.

You will work in a production environment where correctness, reliability, and operational awareness matter. While parts of the system currently utilize technologies such as Node.js, TypeScript, React, Docker, and cloud platforms, we value engineers who have broader exposure to multiple technologies and paradigms, and who can quickly learn unfamiliar stacks.

Key Responsibilities

Own and develop full-stack functionality from problem definition through production deployment and iteration

Design, implement, and maintain backend services and APIs supporting analytics and payment workflows

Build and evolve frontend applications with a focus on performance, correctness, and maintainability

Take responsibility for production systems, including: diagnosing and fixing production bugs, handling incidents or outages, and understanding system behavior under load and failure

Make pragmatic architectural choices and implement decisions under real-world constraints

Integrate and maintain third-party services such as payment providers

Work with cloud infrastructure and deployments without requiring extensive handholding

Review code and designs with an emphasis on clarity, simplicity, and long-term ownership

Collaborate closely with product and engineering peers to deliver measurable business value

Qualifications and Required Skill Set & Experience

Bachelor’s degree in Computer Science, Computer Engineering, or another STEM field (or equivalent practical experience)

4+ years of professional experience in full-stack or generalist software engineering roles

4+ years of experience working on production systems used by real users

Experience contributing meaningfully to complex, production-grade systems

Experience working across backend, frontend, and infrastructure/production environments

Strong programming fundamentals and ability to reason about systems beyond a single language or framework

Proven ability to debug complex issues in unfamiliar codebases

Solid understanding of system design, data modeling, and API design

Experience applying advanced algorithms and data structures in real-world applications

Professional experience with at least two compiled or functional languages such as C/C++, Java, Kotlin, Clojure, Go, C#, .NET, Erlang/Elixir/Gleam, Nim, Rust, Zig, Haskell or OCaml

Experience with scripting languages used for automation, tooling, or operational tasks such as Bash / Shell scripting, Python, Go, Perl

Hands‑on experience with cloud environments and compute platforms such as AWS EC2, Google Compute Engine, AWS Fargate, Google Cloud Run, Kubernetes (K8s), and/or Virtual Private Clouds (VPC)

Exposure to infrastructure automation and operational tooling, including Terraform, Pulumi, Ansible, and Jenkins

First‑hand experience dealing with production bugs, degraded performance or outages or incidents, and distributed systems behaving unexpectedly

Ability to clearly explain what you built, what made it complex, what went wrong, and how you improved it

Clear understanding of engineering ownership versus feature delivery

Strong communication skills and English fluency (written and verbal)

Nice to Have

Experience in fintech, payments or financial systems

Contributions to open‑source projects or substantial personal projects

Experience improving engineering or business metrics in measurable ways

Exposure to monitoring, observability, or incident response practices

Additional Requirements

Comfortable working remotely with minimal supervision

Proactive, detail‑oriented, and collaborative

Ability to thrive in a fast‑paced, startup ‑like environment.

Apply for the job

Do you want to join our team as our new Full Stack Engineer? Then we'd love to hear about you!