Android Developer

5V Tech; Polska; On-site; PLN 210,000 - 330,000; Full time

Job summary

5V Tech is seeking an experienced Android engineer to take technical ownership within a large, multi-team mobile app. This hands-on leadership contract role focuses on defining architecture, improving stability and shipping high-impact features.

You’ll drive across the Kotlin/Compose stack, mentor engineers, and present outcomes to both technical and non-technical stakeholders. English fluency and a track record of scalable architecture are essential.

Qualifications

• 8+ years in Android development with Kotlin and Compose.
• Experience leading architecture in a large multi-team app.
• Strong English communication with stakeholders.
• Ability to navigate ambiguous, high-risk initiatives.

Responsibilities

• Owning high-risk initiatives from problem definition to production release.
• Setting technical direction and documenting designs backed by data.
• Driving app stability, performance and health across modules.
• Working across the Kotlin/Compose stack including UI, data, networking, and SDKs.
• Debugging root causes of crashes and ANRs, and guiding release practices.
• Leading design reviews and improving testing and monitoring.
• Partnering with PM/EM/stakeholders to clarify scope and risk.
• Mentoring senior engineers to preserve knowledge after the contract ends.
• Presenting work to technical and non-technical audiences.

Skills

Android

Kotlin

Jetpack Compose

Coroutines/Flow

Multi-module architecture

Architectural leadership

English communication

Stakeholder collaboration

Tools

Android Studio

Gradle

Job description

An exciting opportunity for an experienced Android engineer to take technical ownership within a large, multi-team mobile app. This is a hands-on leadership contract where you’ll tackle the most complex, high-impact challenges in the codebase and help shape how the team builds and ships.

What you’ll be doing

• Owning ambiguous, high-risk initiatives from problem definition through to production release
• Setting technical direction for your area, authoring solution designs and decision records backed by data
• Driving app-wide stability, performance and app-health improvements across modules and teams
• Working across the full Kotlin/Compose stack: UI, state, data, networking, SDKs and build
• Debugging and resolving the root causes of the hardest crashes, ANRs and regressions
• Leading design reviews and raising the bar on testing, monitoring and release practice
• Partnering with PM, EM and stakeholders to clarify scope, trade-offs and risk
• Mentoring senior engineers so knowledge and decisions remain after the contract ends
• Presenting and demoing work to technical and non-technical audiences

What you’ll bring

• 8+ years in Android, with expert Kotlin, Jetpack Compose, coroutines/Flow and multi-module architecture at scale
• A track record of leading architecture in a large, multi-team app with staged rollouts and crash/ANR ownership
• The ability to get productive in a large codebase within two weeks and act as the technical tie-breaker
• Strong understanding of OOP, design patterns, SOLID principles and clean coding practices
• Clear written and spoken English, comfortable with technical and non-technical stakeholders