---
title: 'Mobile Developer at Reaktor'
canonical: 'https://feeny.ai/job/mobile-developer-reaktor-helsinki-93yw2vyr6axd'
type: 'job'
last_seen: '2026-09-05'
---

# Mobile Developer at Reaktor

- **Company:** Reaktor
- **Location:** Helsinki, Finland
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-07-23
- **Last confirmed live:** 2026-09-05
- **Apply:** https://jobs.ashbyhq.com/Reaktor/7bebee84-fdbd-464d-80f3-c0f598d7a86c/application

**Skills:** Swift, UIKit, Reactive Programming, Java, Kotlin, iOS, Android, Production app monitoring, Testing ownership, Motion Designer collaboration, SwiftUI, C++, Flutter, Fullstack development, Finnish language

> Develop native iOS and Android mobile applications for the Gaming & Entertainment Business Unit in Helsinki. The role involves collaborating with clients to clarify requirements, contributing to architectural decisions, and participating in the full development cycle from implementation to testing.

## Job description

Reaktor's tech community is looking for an experienced Senior Native Mobile Developer to join our Gaming & Entertainment Business Unit in Helsinki.

If you thrive in native mobile development, enjoy solving complex challenges in multidisciplinary teams, and are curious to work in a low-hierarchy environment, you might just be what we’re looking for.

You will join our Gaming & Entertainment Business Unit, where you will support clients in this domain across both iOS and Android native mobile development.

Your daily tasks may include:

- Developing native mobile applications for both iOS and Android
- Building polished mobile UI experiences, including high-performance animations
- Working on mobile SDKs, integrations, analytics, ads, or attribution frameworks depending on the client project
- Collaborating with clients and stakeholders to clarify requirements, autonomously driving initiatives across the client organization and guiding technical and business teams in selecting the right technologies for their needs.
- Contributing to architectural decisions and long-term technical direction
- Participating in discovery, concepting, and iterative delivery — not just implementation
- Taking ownership of testing, debugging, monitoring, troubleshooting, and production quality
- Occasionally contributing beyond mobile when the project benefits from backend, API, or cloud infrastructure understanding

To thrive in this position, you’ll need:

Must-haves

- Strong experience in native iOS development using Swift and/or Objective-C
- Strong experience in native Android development using Kotlin and/or Java
- A testing ownership mindset - you take responsibility for the full development cycle, from implementation to ensuring features are defect-free and shipped to users
- Experience with production app monitoring and troubleshooting
- Experience engaging with multiple stakeholders to solve challenging, ambiguous problems
- Fluent verbal and written English to collaborate in an international environment

We notice that it usually takes several years of professional experience to build this level of depth across both mobile ecosystems.

Nice-to-haves

- Experience with SwiftUI and/or Jetpack Compose
- Experience with reactive programming
- Experience with Flutter
- Experience with C++
- Familiarity with backend development, APIs, databases, or cloud infrastructure
- Interest in building polished animations and working closely with Motion Designers
- Finnish language skills

Adaptability

Willingness to work in a hybrid setup. This means balancing office, client premises, and remote work.

WHY JOIN US?

For two decades, we’ve been developing qualities and capabilities for adapting, reacting, and supporting change – building Reaktor to hold up in a fast-paced environment while ensuring the well-being of our people.

While working at Reaktor, we’ll provide you with:

- The ability to impact how you work. Together with the client, your team chooses the approach, technologies, and methodologies you think will work best in any given situation
- A community with as much support as your heart desires
- A team that’s not only experienced but considerate as well – they all want you to succeed
- A sustainable work-life balance and support for your daily life outside of work. (e.g., free moving day, Reaktor car share, sick child care services, office space to use for your private events, etc.)
- An opportunity to grow as a professional. In addition to the day-to-day work, we offer internal training courses, community events, and 15-minute coffee breaks to discuss hot topics in tech and design
- A possibility to take part in more extended academy-like studies like Cloud Academy
- 300+ hobby clubs, from winter swimming and running to knitting and archery, that bring people together outside of (and sometimes inside) office hours. Many of these are supported by Reaktor

Diversity, equity, and inclusion

Together, we are committed to making Reaktor an environment that embraces and values all of our employees for the whole of who they are. We encourage applicants from all backgrounds to apply, knowing that studies show that members of underrepresented communities don’t apply for jobs unless they fully satisfy all of the requirements. If you're thinking twice about applying for this reason, we invite you to send us your application anyway. You could be just the person we're looking for. Read more about our DEI work here https://www.reaktor.com/dei.

Interested? Drop us a line – We'll be happy to hear from you!

## About Reaktor

## Company Overview
- **One-liner**: Reaktor is a global technology company that designs and builds category-defining digital solutions across industries, from software development and strategic design to AI and data capabilities.
- **Entity Type**: Private (pre-IPO; planning a listing on Nasdaq Helsinki)
- **Headquarters**: Helsinki, Finland
- **Founded**: 2000
- **Founders**: Not publicly listed

## Core Business
- Primary industries: aerospace & defense, finance, healthcare, industrial, gaming, retail, public sector
- Target customers: large enterprises, government agencies, and high-stakes organizations (B2B, predominantly enterprise)
- Mission / purpose: Create category-defining products that perform when it matters most, driven by a “Culture of Better” – iterative improvement, autonomy, and deep domain expertise

## Products & Services
- **Custom Solutions**: Embedded engineering, design, and strategy teams that partner with clients on mission-critical technology challenges. 97% net revenue retention (2025) and DORA scores 7.5–16% above industry average.
- **Productized Solutions**: Ready-made software products built from 25 years of domain knowledge, already deployed in defense and security markets.
- **Reaktor Ecosystem**: A network of >45 independently operating technology companies that Reaktor invests in or co-founds, providing engineering credibility, domain expertise, and a two‑decade network.

## Market Standing
- **Valuation / Market Cap**: Not disclosed (private pre-IPO)
- **Key Metric**: Estimated annual revenue of ~€190 million (based on company‑stated figures; exact numbers not confirmed in public filings)
- **Notable Investors/Partners**: No external venture investors; partners include ABB, ZAP Surgical Systems, and others across industries.
- **Growth Signals**: Planning an IPO on Nasdaq Helsinki; headcount of 700+ professionals across 9 offices on 3 continents; 58 nationalities; expanding productized software and AI/Data offerings; strong retention and quality metrics.

## Competitive Advantages
- Deep industry specialization (aero, defense, finance, healthcare, etc.) rather than generalist consulting
- 25 years of Nordic‑rooted agile practices and a culture of autonomy and continuous learning
- Full lifecycle partnerships – from problem identification to design, development, and long‑term maintenance
- Productized approach that turns accumulated domain expertise into scalable, reusable software
- Ecosystem model that extends reach and innovation capacity beyond a single firm

## Strategic Focus
- Initial Public Offering on Nasdaq Helsinki to accelerate growth and increase market visibility
- Growth of productized software business, especially in defense & security and other high‑stakes verticals
- Deepening AI and data capabilities (e.g., LLM applications, AI developers) integrated into every client engagement
- Continued expansion of the Reaktor Ecosystem through co‑founding and investing in independent technology companies

## Why Work Here
- **Culture**: “Culture of Better” – people‑first, Nordic values of trust, autonomy, and continuous improvement. 58 nationalities in a global, collaborative environment.
- **Work Model**: Hybrid; team‑specific agreements on on‑site vs. remote work depending on client and project needs.
- **Perks**: Minimum 25 vacation days, top‑class health benefits (including mental health support and ergonomic solutions), professional growth programs (mentoring, internal academies, external courses/books budget), 200+ hobby clubs, relocation support, latest tech equipment.
- **Growth**: Six‑month onboarding, strong emphasis on learning and mastery; opportunities to work on challenging, high‑impact projects across industries.
- **Autonomy**: Cross‑functional teams have freedom to choose tools, methodologies, and tech stacks.

## Sources
1. [reaktor.com – About](https://www.reaktor.com/about-us)
2. [reaktor.com – Careers](https://www.reaktor.com/careers)
3. [reaktor.com – Culture](https://www.reaktor.com/culture)
4. [reaktor.com – All Open Positions](https://www.reaktor.com/careers/all-open-positions)

## Other roles at Reaktor

- [Machine Learning Engineer](https://feeny.ai/job/machine-learning-engineer-reaktor-helsinki-0nt2f0pa5t2c) — Helsinki, Finland
- [Cross Platform - iOS and Android | Retail](https://feeny.ai/job/cross-platform-ios-and-android-retail-reaktor-helsinki-g9j3fzmzrc39) — Helsinki, Finland
- [AI Developer - LLM Applications](https://feeny.ai/job/ai-developer-llm-applications-reaktor-helsinki-hb6354vrjmcj) — Helsinki, Finland
- [Head of Communications & Investor Relations, Global](https://feeny.ai/job/head-of-communications-investor-relations-global-reaktor-helsinki-rcm4d5mn8pys) — Helsinki, Finland
- [Head of Marketing, Global](https://feeny.ai/job/head-of-marketing-global-reaktor-helsinki-hggdvqdatkxw) — Helsinki, Finland
- [Product Management Lead, Retail](https://feeny.ai/job/product-management-lead-retail-reaktor-amsterdam-a1ceagp3jzek) — Amsterdam, Netherlands
- [Senior Fullstack Developer](https://feeny.ai/job/senior-fullstack-developer-reaktor-helsinki-xqkv56tjdmq3) — Helsinki, Finland
- [Senior Fullstack Developer](https://feeny.ai/job/senior-fullstack-developer-reaktor-amsterdam-fnev0zr951jj) — Amsterdam, Netherlands
- [Senior Fullstack Developer](https://feeny.ai/job/senior-fullstack-developer-reaktor-lisbon-er4gb7vwnwzc) — Lisbon, Portugal
- [Business Development Specialist](https://feeny.ai/job/business-development-specialist-reaktor-helsinki-btr7j41wvf0d) — Helsinki, Finland