Lead Architect – SDK Technical Design

6 days ago

Malmo, Skåne, Sweden MittLogik Full time 120,000 - 180,000 per year

Who We Are

At MittLogik Group, we're driven by a passion for solving complex challenges through technology. As a growing IT services provider, we specialize in delivering high-impact consulting and engineering expertise across the Automotive, Embedded Systems, and Telecom industries.

With a strong focus on quality and adaptability, we help our clients accelerate development, scale innovation, and stay ahead in fast-moving technical environments. Our ability to connect niche talent with critical projects has made us a trusted partner to both startups and industry leaders.

Recognized with the DI Gasell award in 2020, 2021, and 2023, we're proud to be one of Sweden's fastest-growing companies.

Headquartered in Lund, with teams across Stockholm, Gothenburg, Linköping, and Bangalore, we operate globally with a local mindset.

Explore more at

Summary:

We're assembling a high-caliber technical team to design and deliver a next-generation Android and iOS SDK — along with a reference mobile application — for enabling resilient, secure digital payments.

As Lead Architect, you'll own the SDKs and reference app's end-to-end technical design, mobile architecture, and backend integration patterns. Your mission: ensure world-class performance, scalability, and security-by-design principles across the entire stack.

Key Responsibilities:

  • Lead the technical design of the SDK, including mobile architecture, modular component design, and backend integration patterns.
  • Define and drive performance and scalability strategies across the SDK and related mobile applications.
  • Enforce security-by-design principles throughout all phases — from threat modeling to secure coding and verification.
  • Provide hands-on technical leadership: mentor engineers, review code, and ensure high-quality deliverables.
  • Oversee integration of proximity communication technologies (NFC, Bluetooth, QR), secure element/TEE usage, and resilient payment flows within the SDK.
  • Ensure compliance with industry standards and regulations (OWASP MASVS, PCI, PSD2, EMV, GDPR).
  • Establish and oversee robust testing strategies: unit, integration, performance, and comprehensive security testing (including static/dynamic analysis and penetration testing).
  • Produce clear architecture documentation, API design guidelines, and developer-ready integration materials.
  • Promote an agile delivery model with regular sprint demos and transparent progress reporting.
  • Champion a top-tier developer experience — intuitive APIs, clean documentation, and smooth integration support.

Required Competencies:

  • Proven experience as a Lead Architect or equivalent, owning the design of mobile SDKs and backend integrations.
  • Native mobile development expertise (Android, iOS) using Kotlin and Swift; React Native or Flutter experience is a plus.
  • Deep understanding of proximity communication (NFC, Bluetooth, QR) and secure device-to-device protocols.
  • Expert-level knowledge of secure coding, encryption, secure storage, and transaction signing using TEE/secure elements.
  • Hands-on experience in SDK development: developer-friendly APIs, modular structures, error handling, and embedded security.
  • Familiarity with compliance and standards: OWASP MASVS, PCI, PSD2, EMV, GDPR.
  • Solid testing background — automation, performance, and penetration testing.
  • Excellent communication skills in English; Swedish is a plus.

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