iOS Engineer

Build like a founder. Ship like Spartan.

Our customers are growing fast and so are we. We are looking for an iOS Engineer (Junior to Middle level) to join our team.

At Spartan, we do not work like a typical outsourcing company. We embed directly with startups backed by YC, Pear VC, a16z, Techstars and others. You will work with founders and engineers from Stanford, MIT, Google, Amazon, Uber and more to help them launch MVPs quickly and scale real products.

This role is a good fit if you are early in your iOS career but already care about building modern iOS apps. You will work on production features, learn from senior engineers, and see your code shipped to real users.

Many of our products use AI heavily. Around 70% of our portfolio involves LLMs, and engineers at Spartan use tools like Cursor, Claude, and Codex to work faster and learn better.

The Kind of People We Look For

We are looking for people who enjoy building things.

It does not matter whether you call it building a product or consulting. What matters is that you feel alive when something goes from nothing to real. We care about shipping, learning, fixing, and shipping again.

If you feel uncomfortable when you are not building, you will probably feel at home here.

We work closely and move fast. We value honesty, kindness, and transparency in how we work with each other. We expect people to speak up, defend their opinions, and fight for what they believe is right when it serves the common goal.

At the same time, we know how to listen, align, and move forward together. We argue when needed, but we do not carry ego. When we win, we win together. When things go wrong, we take it together, fix it together, and still laugh after.

What You Will Do

• Build and maintain modern iOS applications using Swift and SwiftUI

• Implement product features from design to production with guidance from senior engineers

• Participate in the full app lifecycle, including TestFlight, App Store submission, and handling Apple Review feedback

• Work closely with US startup founders, product managers, and designers

• Contribute to MVPs that go from idea to production in a short time

• Follow a structured delivery process including PRDs, async updates, and code reviews

• Apply best practices in SwiftUI, state management, and app architecture

• Use AI tools to reduce boilerplate and accelerate development

• Gradually take ownership of features and product quality

What We Are Looking For

Required

• Comfortable communicating in English

• 1 to 5 years of iOS development experience

• Solid knowledge of Swift

• Hands-on experience with SwiftUI

• Experience with SwiftUI state management and navigation (@State, @Binding, ObservableObject, etc.)

• Experience with Swift Concurrency (async/await) or Combine

• Experience integrating REST APIs and handling JSON

• Understanding of:

  • iOS app lifecycle

  • Basic concurrency concepts

  • State management principles

  • App performance and responsiveness

• Ability to:

  • Read and implement designs from Figma

  • Apply basic UI/UX principles and follow Apple Human Interface Guidelines

• Strong learning mindset and eagerness to improve quickly

Nice to Have

• Familiarity with MVVM or Clean Architecture

• Experience with Core Data or other local persistence solutions

• Experience with dependency injection

• Experience publishing or maintaining apps on the App Store

• Exposure to CI/CD tools such as Xcode Cloud, Fastlane, or GitHub Actions

• Basic testing experience

Tech Stack

iOS

• Swift

• SwiftUI

• Swift Concurrency (async/await) or Combine

• MVVM or Clean Architecture

• URLSession or Alamofire or Moya

Backend and Infrastructure

• REST APIs or GraphQL

• Postgres, MongoDB, Redis

• AWS, GCP, Docker

AI Tools

• Cursor, Claude, Codex

Growth at Spartan

• Mentorship from senior iOS and fullstack engineers

• Clear growth path from Junior to Middle to Senior iOS Engineer

• Work on real startup products, not internal demos

• Learn modern iOS, product thinking, and AI assisted development

• Every project feels like a small startup

Career Growth

• Work directly with founders from YC, Stanford, MIT, Yale, Google, Amazon, Uber, and more.

• Exposure to LLMs, AI agents, cloud infra, and real-time systems.

• Transparent career path and mentorship from engineers who’ve taken 3 companies to IPO.

• Every project feels like its own mini-startup.

Why Spartan

• 50+ MVPs launched, 3 IPOs, $100M+ raised by the startups we build with.

• 95% engineer retention. People stay because the work is worth staying for.

• You build zero to one. Blank repo to live product in weeks. Most engineers get that chance once in a career. Here it’s the job.

• Your work is visible. What you ship this month is in a founder’s investor demo next month.

• No layers, no bureaucracy. You talk to the decision-maker directly, and decisions land in hours, not weeks.

• Every project is a new market, a new stack, a new problem. One year here teaches what three years elsewhere would.

• You’ll never just take tickets. You’ll own problems, ship fast, and grow with the founders we partner with.

Benefits & Perks

• 💰 Competitive salary, 100% salary during probation

• 🏝 Unlimited PTO + public holidays

• 🩺 Premium healthcare insurance + annual health check

• ⚽ Sports clubs for every taste: football, badminton, billiards, pickleball

• 🎮 PS5 and Nintendo at the office

• 🏃 Strava yearly subscription

• 🏠 Hybrid working style, flexible hours

• ✈️ Annual company trip + monthly team parties

• 💻 MacBook provided

• 📜 Social insurance per Labor Law

Work Location

• HCM: 2nd Floor XL Building, 167 Tran Nao, An Khanh Ward

• Da Nang: 2nd Floor, 458 Nguyen Huu Tho, Cam Le Ward