Senior Mobile Engineering Manager (iOS & Android SDK)

🏢 Summary: Leadership role responsible for owning and delivering high-quality mobile SDKs across Android and iOS, ensuring reliable releases, data integrity, and compliance while aligning engineering execution with business needs. The role combines hands-on technical oversight with team management, focusing on SDK stability, telemetry accuracy, and scalable third-party integrations. Success is measured by predictable releases, strong data quality, and effective adoption of AI-augmented engineering workflows. 🗂️ Requirements: 8+ years of mobile engineering experience, Leadership experience managing mobile engineers, Strong production experience in Android and iOS ecosystems, Deep expertise in at least one of Android or iOS, Strong SDK development experience including third-party integrations, Strong SQL proficiency, Experience with Python for data analysis, Experience with Git-based workflows and CI/CD pipelines, Experience with mobile observability and crash reporting tools, Understanding of telemetry and schema change management, Knowledge of networking fundamentals (TCP, UDP, QUIC, latency, TTFB), Experience with privacy and compliance requirements (GDPR, CCPA/CPRA, App Store, Google Play), Experience with experiment design and release validation practices, Degree in Computer Science, Software Engineering or equivalent experience 📃 Skills: Kotlin, Swift, Android, iOS, SQL, Python, Git, CI/CD, GitHub, Sentry, Firebase, Crashlytics, TCP, UDP, QUIC, GDPR, CCPA, CPRA 🏢 Description: How You Will Make an Impact You will be the clear, trusted owner for all things mobile at Opensignal, leading our iOS and Android SDK teams to deliver high-quality software that powers critical data products. You will align external business needs with engineering execution, ensure predictable releases, and protect data continuity and quality across first-party and third-party integrations. Our products rely on our ability to measure network performance accurately and consistently from our mobile apps and SDKs. Evolving our platform in step with business requirements and operating system changes is a critical success factor for this role. You will also help the team adopt AI in a pragmatic, safe, and outcomes-focused way, improving engineering velocity without compromising quality, privacy, or data integrity. Your impact will be measured by reliable on-time releases, stable SDK behavior in partner apps, strong stakeholder confidence, and zero major data outages or data perturbations. Early success includes smooth onboarding and delivery of new platform support (including Android 17 and upcoming iOS releases) without regression to data quality, alongside clear progress in AI-augmented engineering workflows and platform evolution that keeps pace with product needs. Primary Responsibilities Lead and directly manage the mobile engineering organization (currently 3 Android and 2 iOS engineers), including delivery planning, performance, coaching, and hiring support as needed. Serve as the primary cross-functional point of contact for mobile engineering with business, product, and data partnership stakeholders. Own end-to-end mobile release lifecycle management for our SDKs and related apps, ensuring high release quality and predictable delivery. Drive execution across first-party integrations (Opensignal app, Meteor app, ONX Connect) and third-party partner integrations that run our SDK at scale. Establish and enforce strong data-change discipline so SDK changes do not unintentionally alter critical metrics, schemas, or downstream product behavior. Lead experiment rollout and validation practices (feature flags, quality checks, and post-release verification) to confirm behavior changes as expected. Maintain compliance and policy alignment across privacy and platform requirements, including GDPR, CCPA/CPRA, Apple App Store, and Google Play policies. Drive pragmatic adoption of AI-augmented workflows across coding, QA, and data analysis, with clear guardrails for safety, privacy, security, and verification. Stay hands-on where valuable (technical reviews, architecture decisions, and targeted implementation support), while operating primarily as a manager and delivery owner. Knowledge & Skill Typically 8+ years of experience in mobile engineering, including meaningful leadership experience managing engineers and cross-functional delivery; equivalent depth of experience from non-linear career paths is also valued. Strong production experience across Android and iOS ecosystems, with deep expertise in at least one platform and demonstrated leadership capability across both. Strong SDK development experience (not only app development), including integration and maintenance in third-party applications. Strong data literacy, including SQL proficiency, ability to work with Python for analysis, and practical experience in data quality monitoring. Experience with experiment design and validation in software releases, especially where data integrity is business-critical. Strong understanding of telemetry/schema change management and the downstream impact of data contract changes. Solid networking fundamentals and practical experience relevant to mobile measurement use cases (for example TCP/UDP/QUIC behavior, packet flow timing, latency, and time-to-first-byte concepts). Demonstrated ability to communicate clearly with technical and non-technical stakeholders and translate business needs into execution plans. Experience operating within privacy, compliance, and platform-policy constraints for mobile SDKs. Proactive, curious mindset toward AI and modern engineering practices, with demonstrated judgment in adopting new tooling responsibly. We recognize that excellent candidates may not match every listed qualification exactly. If this role aligns with your strengths and experience, we encourage you to apply. Tools & Education Required: production experience with Kotlin and Swift. Required: experience with Git-based development workflows and CI/CD release pipelines (We use Github Actions). Required: experience with observability and crash tooling used in mobile environments (for example Sentry, Firebase, Crashlytics). Required: strong SQL proficiency. Preferred: Python for data analysis and validation workflows. Preferred: experience with feature flag rollouts, emulator/device testing strategies, and release validation frameworks. Preferred: experience with AI-assisted engineering tools/workflows and defining safe usage standards for teams. Education: degree in Computer Science, Software Engineering, or equivalent practical experience. About Us Opensignal is the leading global provider of independent insight and data into network experience and market performance. Our user-centric approach allows communication providers to constantly improve their network and maximise commercial performance. Leading analysts, investors and financial institutions place a high value on our independent analysis and we are regular contributors to their reports. Real network experience is our focus and ultimately that’s what influences customer choice. Our mission is to advance connectivity for all and here at Opensignal, the team is leading the industry in enabling operators to link their network experience and market performance in a way that has never before been possible. With offices in London, Boston Victoria, British Columbia, and Warsaw, and employees around the world, we are a truly global organization. We are an equal-opportunity employer dedicated to building an inclusive and diverse workforce. Benefits We believe we are stronger when we not only celebrate our many differences, values, and voices but include them in everyday practice. Having a diverse and inclusive culture is essential, which is why we offer a flexible approach to work-life balance, operating in a remote-hybrid way. We also offer an attractive range of additional benefits, including: 95% remotely - the team meets in the Warsaw office for 1 day/month Summer party and other social events Comprehensive private health care package for you and your family (dental care included) Multisport Card

🏢 Summary: Technical leadership role for a Mobile Tech Lead responsible for building and scaling high-quality iOS and/or Android applications while owning the full mobile lifecycle. The position combines hands-on development with architectural ownership, mobile DevOps practices, and close backend integration. The role focuses on performance, scalability, and continuous improvement of mobile architecture and engineering standards. 🗂️ Requirements: Proven experience as Tech Lead in Agile mobile teams, Strong hands-on experience with iOS and/or Android development, Proficiency in Swift and/or Kotlin, Knowledge of MVVM and CleanArchitecture, Experience with CI/CD in mobile environments, Experience with mobile testing and monitoring, Experience with API integration and backend basics, Understanding of DevOps practices, Experience or interest in Cloud technologies, Fluent English 📃 Skills: iOS, Android, Swift, Kotlin, MVVM, CleanArchitecture, CICD, Testing, Monitoring, APIs, DevOps, Cloud, Flutter, ReactNative, Java, Node.js, Agile 🏢 Description: Your responsibilities: Lead, mentor, and grow a team of iOS and/or Android engineers, fostering a collaborative and high-performance culture Own the end-to-end mobile lifecycle (build, test, deploy, run – You build it, you run it) Develop scalable, high-quality mobile applications with a strong focus on performance and user experience Ensure code quality through pair programming, reviews, and defined engineering standards Align mobile solutions closely with backend systems, APIs, and enterprise architecture Drive the evolution of the mobile architecture, tooling, and overall application landscape Identify and reduce technical debt and operational risks Collaborate closely with Product, Design, SRE, and Security to deliver sustainable and reliable solutions Your Profile: Proven experience as a Tech Lead in Agile mobile teams Strong hands-on background in iOS (Swift) and/or Android (Kotlin) Solid understanding of modern architecture patterns (e.g. MVVM, Clean Architecture) Experience with CI/CD, testing, and monitoring in mobile environments Full-stack mindset (API integration, backend basics, DevOps awareness) Strong problem-solving skills, ownership, and decision-making capabilities Experience with or interest in cloud technologies Clear communication skills and strong self-initiative Fluent in English Nice to have -Experience with cross-platform frameworks (Flutter, React Native) -Backend knowledge (e.g. Java, Node.js) -Experience with cloud & DevOps You are comfortable coming to our Warsaw office 3 days a week. How about? Employment contract? Of course. With us you do not have to worry about stable employment. Benefits? We have them! Among other: corporate incentive program, sport card, private medical care. Lunch card? With the cooperation extended and permanent contract, you will receive additional funds to use for meal purchases. Working in a hybrid model? Of course! ! You work with us 2 days a week from home. Work wherever you want? In PAYBACK you have the opportunity. Working 100% remotely, also from European countries for 15 days a year. ‎Flexible working hours? Sounds great! We start working between 7 to 10. Trainings? Of course. We provide training to develop hard and soft skills. Convenient location? Sure! We invite you to our new office at Rondo Daszyńskiego, but we are currently also working remotely. Dress code? We definitely say no. There are no rigid dress code rules in our company, sneakers are more than welcome. Friendly atmosphere at work? Yes! In PAYBACK, people are the most important asset‎. Something is missing? Open communication is our priority, so dare to ask!‎

🏢 Summary: Lead a mobile engineering team to build and maintain scalable iOS and Android applications, owning the full mobile development lifecycle from development to operations. The role focuses on mobile architecture, engineering quality, API integration, and collaboration with cross-functional teams in a hybrid work environment. 🗂️ Requirements: Experience as a Tech Lead in Agile mobile teams, Strong hands-on experience with Swift and/or Kotlin, Knowledge of MVVM and Clean Architecture, Experience with CI/CD, testing, and monitoring, Understanding of API integration and backend basics, DevOps awareness, Strong problem-solving and decision-making skills, Fluent English, Availability to work from the Warsaw office 3 days per week 📃 Skills: Swift, Kotlin, MVVM, CI/CD, Testing, Monitoring, APIs, DevOps, Flutter, React, Java, Node.js, Android, iOS 🏢 Description: Your responsibilities: Lead, mentor, and grow a team of iOS and/or Android engineers, fostering a collaborative and high-performance culture Own the end-to-end mobile lifecycle (build, test, deploy, run – You build it, you run it) Develop scalable, high-quality mobile applications with a strong focus on performance and user experience Ensure code quality through pair programming, reviews, and defined engineering standards Align mobile solutions closely with backend systems, APIs, and enterprise architecture Drive the evolution of the mobile architecture, tooling, and overall application landscape Identify and reduce technical debt and operational risks Collaborate closely with Product, Design, SRE, and Security to deliver sustainable and reliable solutions Your Profile: Proven experience as a Tech Lead in Agile mobile teams Strong hands-on background in iOS (Swift) and/or Android (Kotlin) Solid understanding of modern architecture patterns (e.g. MVVM, Clean Architecture) Experience with CI/CD, testing, and monitoring in mobile environments Full-stack mindset (API integration, backend basics, DevOps awareness) Strong problem-solving skills, ownership, and decision-making capabilities Experience with or interest in cloud technologies Clear communication skills and strong self-initiative Fluent in English Nice to have -Experience with cross-platform frameworks (Flutter, React Native) -Backend knowledge (e.g. Java, Node.js) -Experience with cloud & DevOps You are comfortable coming to our Warsaw office 3 days a week. How about? Employment contract? Of course. With us you do not have to worry about stable employment. Benefits? We have them! Among other: corporate incentive program, sport card, private medical care. Lunch card? With the cooperation extended and permanent contract, you will receive additional funds to use for meal purchases. Working in a hybrid model? Of course! ! You work with us 2 days a week from home. Work wherever you want? In PAYBACK you have the opportunity. Working 100% remotely, also from European countries for 15 days a year. ‎Flexible working hours? Sounds great! We start working between 7 to 10. Trainings? Of course. We provide training to develop hard and soft skills. Convenient location? Sure! We invite you to our new office at Rondo Daszyńskiego, but we are currently also working remotely. Dress code? We definitely say no. There are no rigid dress code rules in our company, sneakers are more than welcome. Friendly atmosphere at work? Yes! In PAYBACK, people are the most important asset‎. Something is missing? Open communication is our priority, so dare to ask!‎

🏢 Summary: Frontend-leaning Fullstack Engineer role focused on building and owning end-to-end SaaS features using modern frontend frameworks, scalable backend services, and AI-driven automation tools. The position combines React/Next.js development with Node.js backend work, async systems, and production AI integrations. Strong emphasis on speed, ownership, and delivering reliable, high-scale systems. 🗂️ Requirements: 3+ years professional full-stack development experience, Strong proficiency in React.js and Next.js, Solid backend experience with Node.js (NestJS preferred), Experience integrating external APIs (authentication, pagination, retries, rate limits), Experience with asynchronous processing, queues, and background jobs, Hands-on experience with AI tools (OpenAI, Claude, Cursor), Strong SQL skills (PostgreSQL preferred), Experience building reliable systems (error handling, retries, observability), Fluent English and Polish 📃 Skills: React, Next.js, Node.js, NestJS, JavaScript, TypeScript, PostgreSQL, SQL, REST, WebSockets, gRPC, Kafka, BullMQ, LavinMQ, AWS, GCP, DigitalOcean, Fly.io, GitLab, OpenAI, Claude, Cursor, Golang, Elixir, Rust, BigQuery, ClickHouse 🏢 Description: At Web Impact, we’re more than just an email marketing agency and digital solutions provider. We build cutting-edge, socially impactful products that redefine how businesses operate in the digital world. We’re looking for a frontend-leaning Fullstack Engineer who enjoys building complex systems, integrating external services, and leveraging AI tools to speed up development and automate workflows. If you’re excited about combining modern frontend development with AI-driven workflows and automation tools like Claude Code, Cursor, and LLM frameworks , this one is for you. What You’ll Do Own and deliver end-to-end features across SaaS products and internal tools Build modern, high-performance frontends using Next.js and React.js Develop scalable backend services using Node.js / NestJS Design and integrate APIs (REST, WebSockets, external services) Build and maintain automation workflows and background jobs Work with async systems, queues, and event-driven architectures Integrate third-party services with real-world constraints (rate limits, retries, auth flows) Use AI tools to improve development speed, testing, and automation Collaborate directly with product, data, and leadership teams AI & Automation This role includes working with modern AI tooling and automation systems, with a strong focus on speed, ownership, and execution : Using tools like Claude Code, Cursor, and OpenAI SDK in daily development Building AI-driven workflows and integrations quickly and iteratively Automating repetitive processes (data handling, content, integrations) Applying LLMs in production with a pragmatic, results-first approach Taking full ownership of problems - from idea to production Shipping fast, testing in real conditions, and iterating based on outcomes Being accountable for delivery - not just writing code, but making things work end-to-end Prioritizing execution over perfection - speed is key What We’re Looking For 3+ years of professional full-stack experience Strong frontend skills in React.js / Next.js Solid backend experience with Node.js (NestJS preferred) Experience integrating external APIs (auth, pagination, retries, rate limits) Experience working with async processing, queues, and background jobs Hands-on experience with modern AI tools (OpenAI, Claude, Cursor, etc.) Good SQL skills (PostgreSQL preferred) Understanding of building reliable systems (error handling, retries, observability) Strong communication skills and ability to work cross-functionally Fluent in English and Polish Nice to Have Experience with Rust (async, Tokio, Axum) Experience with Elixir (Phoenix LiveView, GenServer) Understanding of distributed systems and architectures Experience with multi-region deployments and geo-distributed infrastructure Experience building systems with high parallelism (a large number of workers processing jobs concurrently) Familiarity with distributed databases and data consistency trade-offs Experience with multi-tenancy architectures (tenant isolation, scaling strategies) Experience working with high-throughput event pipelines Our Tech Stack Frontend: Next.js, React.js Backend: Node.js, NestJS, Golang, Elixir, Rust Data: PostgreSQL, BigQuery, ClickHouse Infra: AWS, Fly.io , Google Cloud, DigitalOcean Queues & Workers: LavinMQ, BullMQ, Kafka CI/CD: GitLab CI AI/ML & Automation: Proprietary GenAI models, OpenAI, Claude, internal tooling Integrations: REST, gRPC, WebSockets, external APIs with rate limits Why Join Us? Work on high-scale SaaS systems processing hundreds of millions of events daily , with real-time pipelines and data-heavy workloads. Ownership from day one - influence architecture, technology choices, and product direction. Collaborate with world-class engineers, AI specialists, and PMs. Innovation-first culture - explore cutting-edge frameworks and architectures. Fast execution, minimal bureaucracy, no unnecessary meetings Opportunity to work with modern AI tooling in production Competitive senior-level compensation and career growth. Social impact - contribute to automation products that empower businesses and communities. Our Streamlined Hiring Process Initial call Technical deep dive with our team Decision

🏢 Summary: Engineering role focused on maintaining and improving a production Ruby on Rails system in a sustainability-focused product. The position involves triaging client requests, resolving full-stack production incidents, and collaborating with Product and Customer teams in a dynamic, ticket-driven environment. It emphasizes system reliability, root-cause analysis, and continuous improvement of support processes. 🗂️ Requirements: 5+ years of Ruby on Rails experience, Strong experience with production systems, Ability to debug and perform root-cause analysis, Full-stack capability (backend, integrations, basic infrastructure), Experience handling incidents and production issues, Ability to work in on-call rotations, Experience with CI/CD pipelines, Experience with cloud infrastructure, Strong understanding of relational databases 📃 Skills: Ruby, Rails, Hotwire, Turbo, AWS, Docker, PostgreSQL, Datadog, GitHub, CI/CD, Jira, Slack 🏢 Description: Do you care about making an impact on sustainability? Help consumers and brands better understand their environmental impact and make better choices for the planet! 🌎 This role sits at the intersection of engineering, product, and client interaction. You will work in a dynamic, ticket-driven environment where priorities shift based on real usage, incidents, and business needs. What you’ll do: Handle and triage incoming client requests (Jira, Slack, calls) Investigate and resolve incidents across the full stack (backend, frontend, integrations) Work on production issues - from quick fixes to deeper root-cause analysis Collaborate with Product and Customer teams to understand and address user needs Implement small improvements and fixes independently Contribute to improving incident handling and support processes Participate in on-call rotations and ensure system reliability Provide technical input on feasibility and impact of client requests Tech stack: Ruby on Rails (monolith) Hotwire / Turbo AWS Docker GitHub Actions (CI/CD) PostgreSQL Datadog What are we looking for? 🎯 5+ years of experience with Ruby on Rails Strong experience working with production systems Excellent debugging and problem-solving skills Ability to work across the stack (backend, integrations, basic infra) Strong ownership and communication skills Comfortable working in a dynamic, reactive environment Nice-to-have: Experience in support / maintenance / -like roles Familiarity with monitoring tools (e.g. Datadog) Experience with AWS What you get: Real impact on system stability and client experience High ownership and autonomy in decision-making Exposure to a wide range of technical challenges Close collaboration with product and client-facing teams Opportunity to deeply understand how the system behaves in production A role suited for engineers who enjoy problem-solving over repetitive feature delivery It is not the best fit if: You are looking for a purely feature-driven role with long-term, predictable roadmaps You get frustrated by frequent context switching or changing priorities You expect a clean, well-structured codebase with minimal technical debt Sounds like a fit? Let’s talk! 🚀

🏢 Summary: Frontend-leaning Fullstack Engineer role building high-scale SaaS systems with modern React/Next.js frontends and Node.js/NestJS backends, heavily leveraging AI tools and automation. You will design APIs, async systems, and event-driven architectures, integrate external services, and ship MVPs to production with ownership and speed. The role emphasizes AI-driven workflows, rapid experimentation, and scalable, production-ready systems. 🗂️ Requirements: 2.5+ years professional full-stack experience, Strong React.js and Next.js skills, Backend experience with Node.js (NestJS preferred), Experience integrating external APIs (auth, pagination, retries, rate limits), Hands-on experience with modern AI tools (OpenAI, Claude, Cursor), Strong SQL skills (PostgreSQL preferred), Experience with async processing, queues, background jobs, Understanding of reliable systems (error handling, retries, observability), Fluent English and Polish 📃 Skills: React, Next.js, Node.js, NestJS, SQL, PostgreSQL, REST, WebSockets, OpenAI, Claude, Cursor, LavinMQ, BullMQ, Kafka, AWS, GCP, Fly.io, DigitalOcean, BigQuery, ClickHouse, Golang, Elixir, Rust, gRPC, GitLabCI 🏢 Description: At Web Impact, we’re more than just an email marketing agency and digital solutions provider. We build cutting-edge, socially impactful products that redefine how businesses operate in the digital world. We’re looking for a frontend-leaning Fullstack Engineer who enjoys building complex systems, integrating external services, and leveraging AI tools to speed up development and automate workflows. If you’re excited about combining modern frontend development with AI-driven workflows and automation tools like Claude Code, Cursor, and LLM frameworks , this one is for you. What You’ll Do Develop and contribute to end-to-end features across SaaS products and internal tools, collaborating with senior engineers on architecture and implementation decisions. Build modern, high-performance frontends using Next.js and React.js Develop scalable backend services using Node.js / NestJS Design and integrate APIs (REST, WebSockets, external services) Build and maintain automation workflows and background jobs Work with async systems, queues, and event-driven architectures Integrate third-party services with real-world constraints (rate limits, retries, auth flows) Use AI tools to improve development speed, testing, and automation Collaborate directly with product, data, and leadership teams Build MVPs, proof-of-concepts, and new product ideas from scratch Rapidly validate business ideas through experimentation and iteration Help evolve successful prototypes into production-ready systems AI & Automation This role includes working with modern AI tooling and automation systems, with a strong focus on speed, ownership, and execution : Using tools like Claude Code, Cursor, and OpenAI SDK in daily development Building AI-driven workflows and integrations quickly and iteratively Automating repetitive processes (data handling, content, integrations) Applying LLMs in production with a pragmatic, results-first approach Taking ownership of problems - from idea to production Shipping fast, testing in real conditions, and iterating based on outcomes Being accountable for delivery - not just writing code, but making things work end-to-end Prioritizing execution over perfection - speed is key What We’re Looking For 2,5+ years of professional full-stack experience Strong frontend skills in React.js / Next.js Backend experience with Node.js (NestJS preferred) Experience integrating external APIs (auth, pagination, retries, rate limits) Hands-on experience with modern AI tools (OpenAI, Claude, Cursor, etc.) Good SQL skills (PostgreSQL preferred) Experience working with async processing, queues, and background jobs Understanding of building reliable systems (error handling, retries, observability) Strong communication skills and ability to work cross-functionally Fluent in English and Polish Nice to Have Experience with Rust (async, Tokio, Axum) Experience with Elixir (Phoenix LiveView, GenServer) Understanding of distributed systems and architectures Experience with multi-region deployments and geo-distributed infrastructure Experience building systems with high parallelism (a large number of workers processing jobs concurrently) Familiarity with distributed databases and data consistency trade-offs Experience with multi-tenancy architectures (tenant isolation, scaling strategies) Experience working with high-throughput event pipelines Our Tech Stack Frontend: Next.js, React.js Backend: Node.js, NestJS, Golang, Elixir, Rust Data: PostgreSQL, BigQuery, ClickHouse Infra: AWS, Fly.io , Google Cloud, DigitalOcean Queues & Workers: LavinMQ, BullMQ, Kafka CI/CD: GitLab CI AI/ML & Automation: Proprietary GenAI models, OpenAI, Claude, internal tooling Integrations: REST, gRPC, WebSockets, external APIs with rate limits Why Join Us? Work on high-scale SaaS systems processing hundreds of millions of events daily , with real-time pipelines and data-heavy workloads. Ownership from day one - influence architecture, technology choices, and product direction. Collaborate with world-class engineers, AI specialists, and PMs. Innovation-first culture - explore cutting-edge frameworks and architectures. Fast execution, minimal bureaucracy, no unnecessary meetings Opportunity to work with modern AI tooling in production Competitive senior-level compensation and career growth. Social impact - contribute to automation products that empower businesses and communities. Our Streamlined Hiring Process Initial call Technical deep dive with our team Decision

🏢 Summary: Senior Android Engineer role in a greenfield product team building a large-scale banking application using Kotlin Multiplatform and Compose Multiplatform. The position focuses on developing shared UI and business logic, owning Android-specific integrations, and shaping architecture and engineering standards from the ground up. Strong emphasis on high-quality delivery, CI/CD practices, and daily use of AI-assisted development tools. 🗂️ Requirements: Minimum 5 years of native Android development experience, Expert-level proficiency in Kotlin, Strong experience with Jetpack Compose, Hands-on production experience with Kotlin Multiplatform (KMP), Experience with Compose Multiplatform, Deep understanding of MVVM, MVI, Clean Architecture, Experience building and maintaining Design Systems in Compose, Strong knowledge of Android platform specifics (lifecycle, permissions, notifications, Play Store), Experience with testing frameworks (JUnit, MockK, Compose UI testing), Experience with mobile CI/CD tools (GitHub Actions, Bitrise, Fastlane), Daily professional use of AI-assisted development tools (Claude Code, Cursor, GitHub Copilot) 📃 Skills: Kotlin, Android, KMP, Compose, MVVM, MVI, CleanArchitecture, JUnit, MockK, GitHubActions, Bitrise, Fastlane, Claude, Cursor, Copilot 🏢 Description: Hi, nice you are here! 😊 Embrace change with Efigence! We are a technology company established in 1995, where people are a priority. A team of over 150 technology enthusiasts allowed us to implement hundreds of projects in the banking, insurance, e-commerce and other sectors. Many of them have gained recognition by winning awards in prestigious competitions. We are building a new, dedicated product team for a large-scale banking application and looking for a Senior Android Engineer to join from the ground up. This is a greenfield team setup - you will have direct influence on how the team works, what standards it follows, and how the product evolves. The application is built entirely on Kotlin Multiplatform (KMP) with Compose Multiplatform for shared UI across Android and iOS. We need people who work with agility - who thrive in short iterations, understand what they are building and why, and take ownership of delivering high-quality solutions end-to-end. Your Android expertise will be essential for platform-specific integrations and performance, but equally important is your ability to think in product terms: understanding user needs, challenging requirements, and proposing better approaches. Proficient, daily use of Agentic Engineering tools (Claude Code, Cursor) is a core expectation. Your Responsibilities: 🔹Design, develop, and maintain shared UI components and screens using Compose Multiplatform 🔹Contribute to shared business logic layer using Kotlin Multiplatform 🔹Own Android-specific platform integrations (permissions, notifications, biometrics, deep linking, app lifecycle) 🔹Build, extend, and maintain Design System components in Compose Multiplatform — ensure consistency, reusability, and alignment with design specifications across the product 🔹Participate actively in product discovery and sprint ceremonies — understand the why behind every feature, challenge assumptions, and propose better solutions 🔹Deliver working software in short iterations with high quality — own your work from concept through production 🔹Collaborate on architecture decisions and help establish best practices for the KMP/CMP codebase 🔹Write clean, testable, and well-documented code following Clean Architecture principles 🔹Conduct thorough code reviews focused on quality, consistency, and shared standards 🔹Collaborate closely with iOS engineers, backend teams, QA, product managers, and designers in a cross-functional product team 🔹Continuously improve development processes, tools, and CI/CD pipelines 🔹Leverage Agentic Engineering tools (Claude Code, Cursor, GitHub Copilot) daily for code generation, refactoring, test writing, and architectural exploration Who Are We Looking For? ✅Minimum 5 years of professional experience in native Android development ✅Expert-level proficiency in Kotlin ✅Strong experience with Jetpack Compose and Compose Multiplatform ✅Hands-on experience with Kotlin Multiplatform (KMP) in production environments ✅Deep understanding of architecture patterns: MVVM, MVI, Clean Architecture ✅Experience working with and contributing to a Design System — building reusable UI components, maintaining component libraries, ensuring design-to-code fidelity ✅Proven ability to work in agile, cross-functional product teams — short iterations, continuous delivery, close collaboration with product and design ✅Strong knowledge of Android platform specifics: lifecycle, permissions, notifications, Play Store distribution ✅Solid experience with testing frameworks (JUnit, MockK, Compose UI testing) ✅Proficiency with CI/CD tools and processes for mobile applications (GitHub Actions, Bitrise, Fastlane) ✅Proficient, daily use of AI-assisted development tools (Claude Code, Cursor, GitHub Copilot) — ability to write effective prompts, critically verify AI outputs, and integrate these tools into standard engineering workflows ✅Product thinking — demonstrated ability to understand business context, user needs, and communicate technical trade-offs to non-technical stakeholders ✅Fluency in Polish and English (written and spoken) ✅Availability for occasional on-site sessions in Warsaw (workshops, kickoffs, planning events) ✅Ownership mindset — responsible for outcomes, not just tasks, with a proactive, can-do approach to problem-solving ✅Clear communicator and collaborative team player, comfortable working in a new and evolving team ✅Growth mindset with continuous learning and openness to experimenting with AI tools and sharing best practices Nice to Have: ✅Experience in fintech or banking sector ✅Knowledge of security best practices for financial applications ✅Experience with iOS platform specifics (helpful for shared UI debugging) ✅Experience with feature flags and A/B testing frameworks ✅Familiarity with Ktor (client and/or server-side) ✅Contributions to open-source projects ✅Experience working at scale (large user base, complex systems) ✅Experience joining or building a team from scratch What Can You Expect from Us? 🌍Fixed-term contract – with the possibility of extension 🌍Career & Development – Trainings, workshops, and collaboration with top industry experts 🌍Exciting Challenges – Work with leading financial market brands and award-winning projects 🌍Supportive Team – Knowledge sharing during Wednesday Wisdom meetings & tech breakfasts 🌍Autonomy & Innovation – We welcome your ideas and initiatives 🌍Stable Collaboration – Clear, transparent B2B agreements in line with current regulations, ensuring mutual trust and predictability 🌍Work-Life Balance – Flexible working hours and a culture that values personal time 🌍Hybrid or Remote Work Model – It’s up to you 🌍Perks & Benefits – Private medical care, Multisport card, English lessons, training budget, and more 🌍Trust & Transparency – Open communication and a culture of feedback Join us as a Senior Android Engineer (Kotlin Multiplatform) and help shape cutting-edge cross-platform solutions while working in a collaborative, growth-focused team!

🏢 Summary: Senior iOS Engineer role in a greenfield product team building a large-scale banking application using Kotlin Multiplatform and Compose Multiplatform. The position focuses on iOS platform integrations, native API bridging, shared UI development, and establishing best practices for KMP on iOS. You will own end-to-end delivery, contribute to architecture, and leverage AI-assisted engineering tools daily. 🗂️ Requirements: Minimum 5 years of professional experience in native iOS development, Expert-level proficiency in Swift, Working knowledge of Objective-C, Hands-on experience integrating Kotlin Multiplatform in iOS projects, Working knowledge of Kotlin and Compose Multiplatform, Strong understanding of iOS internals (UIKit/SwiftUI lifecycle, Keychain, ATS, entitlements, provisioning), Experience with MVVM, MVI, Clean Architecture, Experience building and maintaining Design Systems, Experience with Xcode build system and CocoaPods or SPM integration, Experience with testing frameworks for iOS and KMP, Experience with CI/CD for mobile applications, Daily proficiency with AI-assisted development tools (Claude Code, Cursor, GitHub Copilot), Fluency in Polish and English, Availability for occasional on-site work in Warsaw 📃 Skills: Swift, Objective-C, Kotlin, KMP, Compose, UIKit, SwiftUI, Xcode, CocoaPods, SPM, XCTest, Quick, Nimble, CI/CD, MVVM, MVI, ATS, Ktor, Claude, Cursor, Copilot 🏢 Description: Hi, nice you are here! 😊 Embrace change with Efigence! We are a technology company established in 1995, where people are a priority. A team of over 150 technology enthusiasts allowed us to implement hundreds of projects in the banking, insurance, e-commerce and other sectors. Many of them have gained recognition by winning awards in prestigious competitions. We are building a new, dedicated product team for a large-scale banking application and looking for a Senior iOS Engineer to join from the ground up. This is a greenfield team setup — you will have direct influence on how the team works, what standards it follows, and how the product evolves. The application is built entirely on Kotlin Multiplatform (KMP) with Compose Multiplatform for shared UI across Android and iOS. Your deep understanding of the iOS platform will be critical for platform-specific integrations, bridging native APIs, ensuring smooth App Store distribution, and optimizing the Compose Multiplatform experience on iOS. We need people who work with agility — who thrive in short iterations, understand what they are building and why, and take ownership of delivering high-quality solutions end-to-end. Equally important is your ability to think in product terms: understanding user needs, challenging requirements, and proposing better approaches. Fluent use of Agentic Engineering tools (Claude Code, Cursor) is a core expectation, not a bonus. Your Responsibilities: 🔹Contribute to shared UI development using Compose Multiplatform, ensuring excellent rendering and performance on iOS 🔹Own iOS-specific platform integrations: Keychain, biometrics (Face ID/Touch ID), push notifications, deep linking, app lifecycle, permissions 🔹Bridge native iOS APIs (Swift/Objective-C) with the KMP shared layer using expect/actual and native interop 🔹Build, extend, and maintain Design System components in Compose Multiplatform — ensure iOS platform fidelity, consistency, and reusability across the product 🔹Participate actively in product discovery and sprint ceremonies — understand the why behind every feature, challenge assumptions, and propose better solutions 🔹Deliver working software in short iterations with high quality — own your work from concept through production 🔹Collaborate on architecture decisions and help establish best practices for KMP/CMP on the iOS side 🔹Write clean, testable, and well-documented code following Clean Architecture principles 🔹Conduct thorough code reviews focused on quality, consistency, and shared standards 🔹Manage iOS-specific build, signing, and App Store submission processes 🔹Collaborate closely with Android engineers, backend teams, QA, product managers, and designers in a cross-functional product team 🔹Continuously improve development processes, tools, and CI/CD pipelines 🔹Use Agentic Engineering tools (Claude Code, Cursor, GitHub Copilot) daily for code generation, refactoring, testing, and exploration Who Are We Looking For? ✅Minimum 5 years of professional experience in native iOS development ✅Expert-level proficiency in Swift; working knowledge of Objective-C for interop scenarios ✅Strong understanding of iOS platform internals: UIKit/SwiftUI lifecycle, Keychain, App Transport Security, entitlements, provisioning ✅Hands-on experience with Kotlin Multiplatform (KMP) integration in iOS projects ✅Working knowledge of Kotlin and Compose Multiplatform sufficient for daily contribution to shared code ✅Deep understanding of architecture patterns: MVVM, MVI, Clean Architecture ✅Experience working with and contributing to a Design System — building reusable UI components, maintaining component libraries, ensuring design-to-code fidelity across platforms ✅Proven ability to work in agile, cross-functional product teams — short iterations, continuous delivery, close collaboration with product and design ✅Experience with Xcode build system, CocoaPods/SPM integration with KMP frameworks ✅Solid experience with testing frameworks (XCTest, Quick/Nimble, and KMP shared test suites) ✅Proficiency with CI/CD tools and processes for mobile applications ✅Proficient, daily use of AI-assisted development tools (Claude Code, Cursor, GitHub Copilot) — effective prompting, critical verification of outputs, integration into engineering workflows ✅Product thinking — ability to understand business context, empathize with users, and communicate trade-offs to non-technical stakeholders ✅Fluency in Polish and English (written and spoken) ✅Availability for occasional on-site sessions in Warsaw (workshops, kickoffs, planning events) ✅Ownership mindset — responsible for outcomes, not just tasks, with a proactive, can-do approach to problem-solving ✅Clear communicator and collaborative team player, comfortable working in a new and evolving team ✅Growth mindset with continuous learning and openness to experimenting with AI tools and sharing best practices Nice to have: ✅Experience in fintech or banking sector ✅Knowledge of security best practices for financial applications ✅Experience with iOS platform specifics (helpful for shared UI debugging) ✅Experience with feature flags and A/B testing frameworks ✅Familiarity with Ktor (client and/or server-side) ✅Contributions to open-source projects ✅Experience working at scale (large user base, complex systems) ✅Experience joining or building a team from scratch What Can You Expect from Us? 🌍Fixed-term contract – with the possibility of extension 🌍Career & Development – Trainings, workshops, and collaboration with top industry experts 🌍Exciting Challenges – Work with leading financial market brands and award-winning projects 🌍Supportive Team – Knowledge sharing during Wednesday Wisdom meetings & tech breakfasts 🌍Autonomy & Innovation – We welcome your ideas and initiatives 🌍Stable Collaboration – Clear, transparent B2B agreements in line with current regulations, ensuring mutual trust and predictability 🌍Work-Life Balance – Flexible working hours and a culture that values personal time 🌍Hybrid or Remote Work Model – It’s up to you 🌍Perks u0026amp; Benefits – Private medical care, Multisport card, English lessons, training budget, and more 🌍Trust & Transparency – Open communication and a culture of feedback Join us as a Senior iOS Engineer (Kotlin Multiplatform) and help shape cutting-edge cross-platform solutions while working in a collaborative, growth-focused team!

🏢 Summary: Leadership role to build and scale the engineering function for an early-stage, perimeter-safe data lineage and migration impact-analysis platform serving regulated enterprises. You will own delivery, quality, security readiness, and roadmap execution while partnering with the Chief Architect and leading a distributed team. This is a hands-on player-coach position focused on bringing engineering discipline and enterprise-grade maturity to a growing product. 🗂️ Requirements: Engineering leadership experience managing and growing teams, Hands-on technical depth in data platforms, metadata, backend or platform engineering, Experience building or rebuilding engineering functions in early-stage environments, Experience implementing testing, QA, CI/CD and release processes, Experience leading distributed or offshore teams, Knowledge of security and compliance practices (SOC 2, audit logging, SSO, secure deployment), Strong practical use of AI in engineering workflows, Authorization to work in the U.S. without visa sponsorship, Residence in an eligible U.S. state 📃 Skills: Data, Metadata, Backend, CI/CD, DevOps, QA, Containerization, Infrastructure-as-code, SOC2, SSO, AI, Security, Compliance, Audit, DevOps, Versioning 🏢 Description: Lead the engineering function behind an early-stage, perimeter-safe data lineage and migration impact-analysis platform for regulated enterprises. Description We are hiring a Director of Engineering to lead and grow the engineering organization behind a working product that is becoming a standalone business. This is a build-focused role where you will own delivery, quality, security readiness, engineering process, and execution of the technical roadmap, partnering closely with the Chief Architect. What You'll Work On - Lead a distributed engineering team across platform/product engineering, connectors, QA, DevOps/infra, AI implementation, data governance, and support. - Own delivery, quality, release discipline, and execution of the technical roadmap. - Implement automated testing, QA, CI/CD, release governance, and versioning. - Drive repeatable, perimeter-safe deployments including containerization, infrastructure-as-code, secure deployment, and SOC 2 readiness. - Partner on the connector framework, canonical metadata model, architecture decisions, and product IP. - Assess current talent, retain strong contributors, hire to fill gaps, and align the team to the roadmap. - Promote practical AI usage across coding, review, testing, operations, and engineering productivity. What You'll Bring - Experience leading and growing engineering teams, owning delivery, and shipping products. - Hands-on technical depth in data platforms, metadata, backend systems, or platform engineering. - Experience building or rebuilding engineering functions in startup or early-stage environments. - Experience implementing testing, QA, CI/CD, and release practices. - Experience leading distributed or offshore teams. - Security and compliance literacy for regulated environments, including SOC 2, audit logging, SSO, data security, and secure deployment. - Strong AI fluency with practical application across engineering workflows. How You Work - Player-coach mindset with ability to go deep technically and ship pragmatically. - Comfortable operating with incomplete information and defining direction. - Ability to improve quality, process, and security without slowing momentum. Bonus Points - Experience maturing early-stage products to enterprise-grade. - Background in regulated industries such as financial services, insurance, healthcare, or government. - Familiarity with perimeter or on-prem deployment, lineage, metadata, graph data, or migration impact-analysis. What Success Looks Like - Clear team ownership and strong delivery rhythm with a credible roadmap-to-release model. - Testing, QA, CI/CD, release governance, and versioning in place without slowing product momentum. - Progress toward enterprise-grade readiness for regulated buyers. - Trusted partnership with the Chief Architect and credible leadership across engineering and executive stakeholders. Additional Requirements - Must be authorized to work for any employer in the U.S. (no visa sponsorship available). - Must reside in one of the following U.S. states: AL, AR, AZ, CA, CO, CT, DE, FL, GA, IA, ID, IL, IN, KS, MA, MD, MI, MN, MO, NC, NH, NJ, NV, NY, OH, OK, OR, PA, TN, TX, VA, WI, or Washington DC.

🏢 Summary: Senior backend‑heavy fullstack engineer to build a greenfield prenatal screening diagnostics product, owning features end‑to‑end across backend and frontend. The role focuses on Java/Spring Boot architecture, data modeling, APIs, and AWS infrastructure, with React/TypeScript contributions as needed. AI coding tools are expected as a core part of daily development in a regulated, production environment. 🗂️ Requirements: Strong Java and Spring Boot expertise, Experience designing APIs and domain models, Solid understanding of OOP and SOLID principles, Ability to define service boundaries and system architecture, Working proficiency in React and TypeScript, Proven experience using AI coding tools in daily development, Experience writing unit, integration, and API tests, Experience with PostgreSQL schema design and query optimization, Experience deploying and operating workloads on AWS, Ability to work in greenfield, ambiguous environments 📃 Skills: Java, Spring, SpringBoot, React, TypeScript, PostgreSQL, AWS, ECS, EKS, RDS, Lambda, S3, OOP, SOLID, REST, AI, Claude, Cursor, Testing 🏢 Description: Our client — a global leader in healthcare and diagnostics — is building a new prenatal screening diagnostics product from the ground up. We are looking for a senior backend‑heavy fullstack engineer who can own features end‑to‑end — from data modeling and APIs to the UI. The role offers real ownership within a highly regulated, impact‑driven product environment. Using AI tooling as a core part of daily engineering work is expected — not as an experiment, but as a standard way of building and delivering software. What You'll do: Own features end-to-end: design, implement, test, deploy, and maintain across the full stack. Work split ~80% backend, 20% frontend. Make foundational architectural decisions on a greenfield codebase — data models, API contracts, service boundaries, test strategy Build and maintain the Java/Spring Boot backend that powers the product's core logic Contribute to the React/TypeScript frontend when needed — you're backend-primary, but you ship UI when the team needs it Integrate AI coding tools into your daily workflow to accelerate delivery while maintaining code quality — and help the team adopt these practices Collaborate directly with product stakeholders to refine requirements in a fast-moving, low-ceremony environment Requirements: Strong Java and Spring Boot expertise — clean API design, domain modeling, sound architectural trade-offs. You think in terms of service boundaries, data flow, and maintainability, not just making it work Solid grasp of software design principles — object-oriented programming, SOLID, clean architecture, separation of concerns. You write code that the next person can read, extend, and trust. You know when a pattern helps and when it's ceremony Working proficiency in React and TypeScript — you can pick up frontend tasks, build components, and integrate with backend APIs independently Proven experience integrating AI coding tools (Claude Code, Cursor, or equivalent) into daily development workflow — including prompt design for code generation, output validation, and actively preventing AI-generated technical debt. You can describe concrete examples of where AI accelerated your delivery and where you chose to override it Testing as a professional discipline, not a checkbox — you write unit, integration, and API tests as part of delivery, own the test pyramid decisions, and treat untested code as unfinished code PostgreSQL — schema design, query optimization, migrations in a production context AWS experience — you've deployed and operated production workloads on AWS (ECS/EKS, RDS, Lambda, S3) and can make informed infrastructure decisions Comfort working in ambiguous, greenfield settings — you define scope with stakeholders rather than waiting for pre-scoped tickets Nice-to-Have: Infrastructure as Code (Terraform) Healthcare, diagnostics, or regulated-environment experience Security hardening practice — threat modeling, dependency scanning, secure defaults Observability tooling (CloudWatch, Prometheus, Grafana) CI/CD pipeline design (GitHub Actions or similar) Our offer: Permanent full-time contract (B2B contract) Ability to work entirely remotely or in one of our cool offices around Poland International project environment - challenging and rewarding projects Access to private medical service, life insurance, and multisport card Access to training and certificate courses (including free access to Udemy training platform) Cafeteria Benefits System - vouchers for purchases and sevices Awesome company events and parties