Senior Android Developer (f/m/d) at adjoe

✨ The Stack take on this adjoe job

• 🏢 adjoe has 15 jobs here, 15 with visa sponsorship see all
• 🛂 Visa: EU Blue Card. Minimum salary: €50,700 a year guide
• 💡 No salary shown. Ask adjoe if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

Apply with your AI assistant

With The Stack connected to Claude, ChatGPT or Cursor, paste this. Your assistant tailors your CV and cover letter, checks the visa facts and gives you the apply link.

Help me apply to this job on The Stack: https://jobs.trythestack.co/jobs/senior-android-developer-fmd-adjoe

Not connected yet? Connect in a minute. To help your user apply, call the MCP tool prepare_application with slug "senior-android-developer-fmd-adjoe": it returns the apply link, the visa facts and a CV and cover letter checklist. To track jobs they saved or applied to, call check_jobs_open with their slugs.

About the role

Responsibilities:
- Own design, development and optimization of the Android SDK (Kotlin) to ensure stability and low footprint inside third-party apps.
- Implement and maintain high-performance networking and API integrations (gRPC, Protobuf, OkHTTP) with strict backward compatibility.
- Profile and optimise CPU, memory and battery usage; apply ProGuard/R8 and other release-time optimisations.
- Build observability and diagnostics into the SDK using Sentry, Kibana and AWS tooling; investigate incidents at scale.
- Maintain CI/CD pipelines for SDK releases, write integration tests, and collaborate closely with backend, analytics and product teams.

Requirements:
- 8+ years Android experience or 3+ years focused on SDK/library development with deep Kotlin and Android internals expertise.
- Strong knowledge of multithreading, lifecycle management, performance profiling and ProGuard/R8 optimisations.
- Hands-on experience with networking stacks (gRPC/Protobuf/OkHTTP), API design and backward-compatibility strategies.
- Experience with CI pipelines (GitLab CI), observability tools (Sentry/Kibana) and AWS services used for diagnostics.
- Attention to detail, ability to work across teams and experience shipping reliable SDKs at scale; NDK/JNI knowledge is a plus.

Responsibilities

You will own the core development and optimization of the adjoe Ads SDK to ensure high performance and stability across millions of devices. Additionally, you will collaborate with backend teams to design APIs and maintain CI/CD pipelines for efficient SDK delivery.

Requirements

The role requires 8+ years of Android experience or 3+ years in SDK/library development with deep expertise in Kotlin and Android internals. Candidates must have a strong track record in high-performance network design and resource-constrained optimization.

Key skills

• Android — in 27 other listings on The Stack
• Kotlin — in 251 other listings on The Stack
• SDK development — in 18 other listings on The Stack
• API design — in 192 other listings on The Stack
• Multithreading — in 12 other listings on The Stack
• ProGuard — not in any other listing on The Stack
• R8 — not in any other listing on The Stack
• gRPC — in 61 other listings on The Stack
• Protobuf
• OkHTTP
• Gradle
• GitLab CI
• Sentry
• Kibana
• AWS

On The Stack (as of 2026-11-05)

• adjoe has 14 other listings on The Stack, 14 of them marked as offering visa sponsorship.
• 166 visa-sponsored jobs in Germany on The Stack, posted in the last 60 days.

Frequently asked questions about adjoe

Is this Senior Android Developer (f/m/d) role still open?

It was posted on 2026-09-04. Listings more than 30 days old may no longer be active, so check adjoe's site before applying.

Does adjoe offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on adjoe's site.

Where is this role located?

The listing gives the location as Hamburg, Germany. It is marked hybrid.

What skills does this role ask for?

The listing names: Android, Kotlin, SDK development, API design, Multithreading, ProGuard, R8, gRPC, Protobuf, OkHTTP, Gradle, GitLab CI, Sentry, Kibana, AWS.