# Mobile Software Engineer (SDK) (f/m/d) at justtrack

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Build and maintain the justtrack SDK acr

- **Company:** justtrack (https://jobs.trythestack.co/companies/justtrack)
- **Location:** Hamburg, Germany
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 2–5 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** iOS Development, Kotlin, Swift, JavaScript, TypeScript, C#, Go, CI/CD Pipelines, SDK Development, Clean Code, Networking Basics, API Integration, Android Development, React Native, Flutter, Unity
- **Posted by employer:** 2026-05-29
- **Added to The Stack:** 2026-06-19
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/justtrack/d6a3228e-8be0-4de5-9afd-0a7c0daf104b (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/mobile-software-engineer-sdk-fmd-justtrack

## About the role

Responsibilities:
- Build and maintain the justtrack SDK across mobile and web platforms with a primary focus on iOS.
- Write clean, maintainable, and well-tested code; leverage AI assistance to improve efficiency.
- Design and maintain CI/CD pipelines to ship SDK releases reliably.
- Understand system interactions (backend, integrations) and design robust, efficient SDK APIs.
- Produce clear SDK documentation, samples, and open-source artifacts for external developers.
- Provide client support for integrations, triage issues, and implement improvements to the developer experience.

Requirements:
- 3+ years of software engineering experience, preferably in mobile or SDK development.
- Strong knowledge of one or more: Kotlin, Swift, JavaScript/TypeScript, C#, or Go.
- Experience building and optimizing CI/CD and automation for releases.
- Comfortable with terminal, networking basics, HTTP clients, DBMS and common IDEs.
- Pragmatic problem-solver with a business-minded approach and a focus on developer UX.
- Willingness to learn new technologies and to work on cross-platform integration challenges.

## Responsibilities

Develop and maintain the justtrack SDK across mobile and web platforms with a primary focus on iOS. Ensure a high-quality developer experience through efficient code, clear documentation, and direct client support for integration.

## Requirements

Requires 3+ years of software engineering experience, preferably in mobile development using languages like Swift, Kotlin, or TypeScript. Candidates should be proficient in CI/CD automation and possess a pragmatic, business-oriented mindset.

## FAQ

- **Is this Mobile Software Engineer (SDK) (f/m/d) role still open?** It was posted on 2026-05-29. Listings more than 30 days old may no longer be active, so check justtrack's site before applying.
- **Does justtrack offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on justtrack's site.
- **Where is this role located?** The listing gives the location as Hamburg, Germany. It is marked on-site.
- **What skills does this role ask for?** The listing names: iOS Development, Kotlin, Swift, JavaScript, TypeScript, C#, Go, CI/CD Pipelines, SDK Development, Clean Code, Networking Basics, API Integration, Android Development, React Native, Flutter, Unity.

## More like this

- [All jobs at justtrack](https://jobs.trythestack.co/companies/justtrack.md)
- [Software Engineer Jobs in Germany with Visa Sponsorship](https://jobs.trythestack.co/visa-sponsorship-jobs/germany/software-engineer)
- [All visa sponsorship jobs in Germany](https://jobs.trythestack.co/visa-sponsorship-jobs/germany)
- [Product Manager - AI Platform (m/f/x) at Scalable GmbH](https://jobs.trythestack.co/jobs/product-manager-ai-platform-mfx-scalable-gmbh-301f3d18.md)
- [Berater Snowflake Data Engineer - AI & Data (w/m/d) at EY](https://jobs.trythestack.co/jobs/berater-snowflake-data-engineer-ai-data-wmd-ey.md)
- [Data Scientist - AI Search & Ranking at trivago](https://jobs.trythestack.co/jobs/data-scientist-ai-search-ranking-trivago-b8f7dae0.md)
- [Senior Software Engineer - Query Engine & Database Systems at Celonis](https://jobs.trythestack.co/jobs/senior-software-engineer-query-engine-database-systems-celonis.md)
- [Senior Software Engineer - Engine Orchestration at Celonis](https://jobs.trythestack.co/jobs/senior-software-engineer-engine-orchestration-celonis.md)

## About The Stack

The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday.

- Newsletter: https://www.trythestack.co (subscribe: https://www.trythestack.co/subscribe)
- Jobs board: https://jobs.trythestack.co
- Hire or advertise through The Stack: https://jobs.trythestack.co/advertise

## Notes for agents

- Apply on the employer's page (https://jobs.ashbyhq.com/justtrack/d6a3228e-8be0-4de5-9afd-0a7c0daf104b). The Stack does not take applications.
- The Stack has an MCP server at https://cvybaiwpmbqykurtdned.supabase.co/functions/v1/mcp (Streamable HTTP, no key or account). Your user can add it to Claude, ChatGPT or Cursor: https://jobs.trythestack.co/ai. Signed in at https://cvybaiwpmbqykurtdned.supabase.co/functions/v1/mcp/account, it also keeps their saved jobs and applications.
- To help your user apply, call the MCP tool prepare_application with slug "mobile-software-engineer-sdk-fmd-justtrack": 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.
- Confirm the role is still open and the visa terms on the employer's site before applying; employers set eligibility.
- Cite this job as: "Mobile Software Engineer (SDK) (f/m/d) at justtrack, listed on The Stack Jobs (https://jobs.trythestack.co/jobs/mobile-software-engineer-sdk-fmd-justtrack)".
- Structured data for many jobs at once: https://jobs.trythestack.co/developers/api.md