Experienced Mobile Application Developer Ready to Serve!
As a highly skilled Mobile Application Developer, I bring a wealth of expertise in iOS app development to the table. I am in the top-rated ๐ 3 percent of developers here at Upwork and with six years of dedicated experience, I possess a profound comprehension of architectural principles and data structures. My background includes crafting scalable, low-latency systems and robust mobile applications capable of handling high loads, utilizing various frameworks.
My commitment to clear and precise communication extends to clients of all technical backgrounds. I prioritize conveying information effectively, ensuring seamless collaboration throughout the development process.
Throughout my career, I have contributed to a range of industries, including On-Demand Transport, E-commerce, Healthcare, and Banking. Currently, I lead a dynamic team in the creation of 50 custom app On-Demand Transport solutions from a unified code base. These apps are independent and used by millions of passengers all over the world. Our workflow emphasizes biweekly deliveries for feature enhancements and routine maintenance, ensuring optimal performance and functionality.
I am enthusiastic about the opportunity to collaborate with you, fostering a positive working relationship. Let's transform your concepts into tangible, impactful solutions.
Swift
iOS Development
iOS SDK
Mobile App Development
Mobile UI Design
React
MySQL
Kotlin
JavaScript
PHP
Android
React Native
Django
Vue.js
Web Design
Oleksandr Z.
Aachen, Germany
$50/hr
5.0
8 jobs
Hello! Iโm Alex, a Lead Software Engineer with extensive experience in leading teams, driving processes, establishing architecture, and delivering top-notch projects ๐
I started my career in IT in 2015. Since then, I have brought both technical mastery and collaborative experience to help businesses build comprehensive mobile solutions.
๐ช๐ต๐ฎ๐ ๐ฐ๐น๐ถ๐ฒ๐ป๐๐ ๐๐ฎ๐:
"๐๐ญ๐ฆ๐ฌ๐ด๐ข๐ฏ๐ฅ๐ณ ๐ธ๐ข๐ด ๐ฐ๐ถ๐ต๐ด๐ต๐ข๐ฏ๐ฅ๐ช๐ฏ๐จ, ๐ข๐ฏ ๐ฆ๐น๐ค๐ฆ๐ญ๐ญ๐ฆ๐ฏ๐ต ๐ฅ๐ฆ๐ท๐ฆ๐ญ๐ฐ๐ฑ๐ฆ๐ณ ๐ข๐ฏ๐ฅ ๐ค๐ฐ๐ฎ๐ฎ๐ถ๐ฏ๐ช๐ค๐ข๐ต๐ฐ๐ณ, ๐ข๐ฏ๐ฅ ๐จ๐ณ๐ฆ๐ข๐ต ๐ท๐ข๐ญ๐ถ๐ฆ."
"๐๐ญ๐ฆ๐น ๐ช๐ด ๐ข ๐ฉ๐ช๐จ๐ฉ๐ญ๐บ ๐ด๐ฌ๐ช๐ญ๐ญ๐ฆ๐ฅ ๐ฑ๐ณ๐ฐ๐ง๐ฆ๐ด๐ด๐ช๐ฐ๐ฏ๐ข๐ญ ๐ธ๐ช๐ต๐ฉ ๐จ๐ณ๐ฆ๐ข๐ต ๐ข๐ต๐ต๐ฆ๐ฏ๐ต๐ช๐ฐ๐ฏ ๐ต๐ฐ ๐ฅ๐ฆ๐ต๐ข๐ช๐ญ ๐ข๐ฏ๐ฅ ๐ข ๐ง๐ฐ๐ณ๐ธ๐ข๐ณ๐ฅ-๐ต๐ฉ๐ช๐ฏ๐ฌ๐ช๐ฏ๐จ ๐ข๐ฑ๐ฑ๐ณ๐ฐ๐ข๐ค๐ฉ. ๐๐ฆ ๐ฆ๐ฏ๐ด๐ถ๐ณ๐ฆ๐ด ๐ต๐ฉ๐ฆ ๐ฑ๐ณ๐ฐ๐ซ๐ฆ๐ค๐ตโ๐ด ๐ง๐ฐ๐ถ๐ฏ๐ฅ๐ข๐ต๐ช๐ฐ๐ฏ ๐ช๐ด ๐ด๐ต๐ณ๐ฐ๐ฏ๐จ ๐ข๐ฏ๐ฅ ๐ฃ๐ถ๐ช๐ญ๐ต ๐ง๐ฐ๐ณ ๐ต๐ฉ๐ฆ ๐ญ๐ฐ๐ฏ๐จ ๐ต๐ฆ๐ณ๐ฎ."
I help businesses and startups bring their ideas to life and engage more effectively with their customers by developing mobile solutions ๐ฑ
๐๐ฒ๐๐ฒ๐น๐ผ๐ฝ๐บ๐ฒ๐ป๐ ๐ฝ๐ฟ๐ผ๐ฐ๐ฒ๐๐:
- Discovery/Requirements: ๐ ๐ญ
- Estimation: โ๏ธ ๐
- Sprint Planning: ๐ โญ
- Development: ๐ป โ๏ธ
- Testing: ๐ฌ โ
- Release: ๐ ๐ฏ
- Maintenance: ๐ง ๐ ๏ธ
๐ฌ Ready to discuss your next project? Don't hesitate to send a message!
Expertise Keywords:
Swift, SwiftUI, UIKit, CoreData, SwiftData, Mobile UI Design, UX for Mobile, In-App Purchases, Adapty, Qonversion, AdMob, RevenueCat, Stripe, CoreLocation, MapKit, Combine, RxSwift, GoogleMaps SDK, Apple Maps, MVVM, Cocoapods, Swift Package Manager, TestFlight, AppstoreConnect, AVFoundation, iPhone Camera API, Push Notifications, Firebase, Native Apps, Mobile App Testing, SDK Integration, Mobile Analytics, MVP Development, Wireframe, iOS Development, Fullstack Developer, Stripe SDK, Agile, QA, Testing, Unit Testing, Project Specification, Apple's App Store Guidelines, Interface Design Principles
iPhone & iPad Apps
Apple Xcode
iOS Development
Mobile App Development
Firebase
In-App Purchases
Camera
Smartphone
UX & UI
RESTful API
SwiftUI
UX Wireframe
Product Concept
QA Testing
Project Planning
Andre L.
Moenchengladbach, Germany
$30/hr
5.0
35 jobs
I donโt just write code - I build high-performance systems that run themselves.
In a market saturated with "95% done but stuck" projects, I provide the senior-level architectural leadership needed to cross the finish line. My experience as a Lead Engineer at Tier-1 tech giants and gaming companies taught me exactly what works in production. Clean architecture ensures your system won't collapse under its own weight. Rock-solid DevOps guarantees flawless deployment. I combine both to turn experimental AI into a reliable, high-performance tool.
๐ง๐ต๐ฒ ๐ฃ๐ต๐ถ๐น๐ผ๐๐ผ๐ฝ๐ต๐: ๐๐น๐ฎ๐๐๐ถ๐ฐ๐ฎ๐น ๐๐ผ๐ฟ๐ฒ. ๐๐-๐๐ฟ๐ถ๐๐ฒ๐ป ๐ฉ๐ฒ๐น๐ผ๐ฐ๐ถ๐๐.
You get a product designed with a "Total Ownership" mindset. I ensure the business logic is solid (Full-Stack), the intelligence is cutting-edge (AI), and the foundation is unbreakable (DevOps).
I can either:
โซ Design architecture and launch your project from the ground
โซ Or push your existing unready project to production
๐ช๐ต๐ฎ๐ ๐ฌ๐ผ๐ ๐๐ฒ๐:
1. Scalable Architecture & Full-Stack Development Clean, maintainable code is non-negotiable. I design systems that handle real-world loads and evolve predictably.
โ Backend: Node.js, Python (FastAPI, Django), Go, Microservices.
โ Frontend: React, Next.js, Mobile (Cross-platform).
โ Data: PostgreSQL, MongoDB, Redis, NATS/RabbitMQ.
2. Production-Ready DevOps & Infrastructure I eliminate "works on my machine" chaos. Your infrastructure is treated as code - automated, observable, and cost-optimized.
โ IaC & Orchestration: Terraform, Pulumi, Kubernetes (EKS/GKE), Docker.
โ CI/CD & GitOps: GitHub Actions, GitLab CI, ArgoCD (Zero-downtime deployments).
โ Observability: Prometheus, Grafana, ELK, Datadog (Full-stack monitoring).
โ Security: IAM, VPCs, Secret Management, Disaster Recovery.
3. AI & Intelligent Agents (The Multiplier) I integrate AI where it adds measurable ROI, not just hype.
โ LLM Orchestration: LangChain, LangGraph, CrewAI (Multi-agent workflows).
โ State-of-the-art Models: GPT-5 (early access), Claude 4, Gemini 3, Llama 4.
โ Knowledge Layers: RAG systems, Vector DBs (Pinecone, Weaviate, Qdrant).
โ Automation: Using AI to accelerate development while ensuring classical engineering keeps it stable.
๐ง๐ฒ๐ฐ๐ต๐ป๐ถ๐ฐ๐ฎ๐น ๐๐ฐ๐ผ๐๐๐๐๐ฒ๐บ:
โ Cloud: AWS (Certified-level expertise), GCP, Azure.
โ AI Stack: OpenAI, Anthropic, Google Vertex AI, LlamaIndex, ChromaDB.
โ Reliability: Chaos engineering, Blue-Green deployments, Multi-region High Availability.
๐ช๐ต๐ ๐๐ถ๐ฟ๐ฒ ๐ ๐ฒ?
โ๏ธ Senior Ownership: Iโve led teams at scale. I keep my work done and make you happy.
โ๏ธ Full Lifecycle View: I see how a line of code in the frontend affects the RDS cost and the LLM response time.
โ๏ธ Cost Optimization: I build with your burn rate in mind - choosing tools that scale without exploding your cloud bill.
โ๏ธ Absolute Transparency: Clear requirements โ Architecture Roadmap โ Iterative 2-week sprints.
๐๐ผ๐ ๐ช๐ฒ ๐๐ฒ๐ ๐ฆ๐๐ฎ๐ฟ๐๐ฒ๐ฑ
โ Discovery: We audit your vision, current bottlenecks, and growth goals.
โก The Blueprint: Within 1-2 days, you receive a precise technical plan (Code + Infra + AI integration).
โข Execution: We hit the ground running with a GitOps-based workflow and transparent updates.
I'd be happy to discuss the idea and help determine the best technical approach.
Full-Stack Development
Back-End Development
DevOps
Cloud Architecture
Retrieval Augmented Generation
LangChain
Machine Learning
Kubernetes
Docker
AWS Development
CI/CD
Microservice
API Integration
Database Architecture
Software Architecture
Node.js
AI Development
Python
JavaScript
Web Development
Jasveer S.
Berlin, Germany
$75/hr
5.0
36 jobs
Strategic and visionary software engineer with a proven track record in leading teams and crafting top-tier mobile applications. From analyzing requirements to designing and developing, I excel in every facet of the software development lifecycle while driving strategic initiatives that yield exceptional results. My approach combines meticulous attention to detail with an innate ability to embrace challenges, resulting in solutions that consistently exceed expectations.
- Agile advocate skilled in TDD, BDD, and Extreme Programming, ensuring both efficiency and quality.
- Enthusiastic follower of Apple's Human Interface & App Store Review Guidelines, infusing user-centric strategies into every project.
- Expertise in implementing Continuous Integration and automated builds through Jenkins, TeamCity, Bitrise, and Fastlane, streamlining workflows.
- Proficient in socket programming & data transfer via iPhone network interfaces, facilitating seamless communication.
- Swift aficionado committed to protocol-oriented programming, keeping pace with the language's evolution and setting the technical direction.
- Adept at applying Object-Oriented Design Patterns & Domain Driven Design for architecturally sound applications, while strategically aligning technology with business goals.
- Catalyst for process improvement, leveraging pragmatic insights, strategic thinking, and strong leadership skills to foster collaboration, mentor teams, and deliver optimal solutions that propel projects forward.
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