Let's start with the role

Back in 2021 we aimed to reform our team and increase its size twofold. After successfully achieving this goal, and looking ahead to 2026, our focus remains on crafting our skills and making Kaizen a "Mobile First" company.

Our mobile team consists of 17+ iOS Engineers and 18 Android Engineers and they are complemented by Software Engineers in Test, for the quality perspective.

Our Engineers work either in our Mobile Infrastructure team or they actively contribute to our cross-functional feature squads.

Our mobile applications have a widespread user base, reaching millions of people across many countries and continents. We use Swift/Kotlin to create a quality codebase and we heavily invest in covering our codebase with tests on all levels. Our goal is to enhance our technical practices and move to the next technical level.

Tech Stack: Swift, Alamofire, SwiftUI components, Modular architecture, GitLab for source code management, Bitrise for CI/CD, XCTest for Unit Testing, XCUITest for UI Testing, MVC to MVP, SwiftLint, Structured Concurrency, Firebase, Figma for designs, Transifex for localization

Supportive Stack/Processes: Scrum/Kanban, Jira / Confluence, Firebase / Google Analytics / Google Tag Manager, Pair programming, Unit testing, GitFlow, Code Reviews

What you’ll bring

• Proficient in Swift programming language.
• Solid understanding of iOS frameworks, UI/UX principles and design patterns.
• Experience with version control systems, such as Git.
• Strong focus on building user experiences of exceptional quality
• Excellent communication and teamwork skills.

Nice to have:

• Experience with code testing methodologies, such as unit testing and integration testing.
• Experience with SwiftUI and modern Swift APIs (Combine, Async/Await, Actors, e.t.c.)
• Familiarity with continuous integration and continuous deployment (CI/CD) processes

Kaizen Gaming Perks

• 🕑 Hybrid way of working;
• 🏃 A buddy will support you with your onboarding;
• 💸 Competitive pay & bonus scheme;
• ⭐Developmental 360° feedback framework;
• 🤸 Multi-sport card;
• 💰 Monthly meal allowance;
• 👩‍⚕️ Private health insurance for you and your family;
• 📚 Unlimited access to Udemy & continuous training;
• 👨‍👩‍👧‍👦 Family Support.

#LI-Hybrid

#LI-gs1

Mission

Speechify is the easiest way to listen to the world’s information. Articles on the web, documents in the cloud, books on your phone. We absorb it all and let you listen to it at your desk, on the go, at your own speed, and with tools that make learning easier, deeper, and faster.

What streaming services have done for audio entertainment, we’re doing for audio information. And whatever we’re doing seems to be working. We’re #1 in our category, and experiencing exponential growth.

Overview

We're looking for a Senior Software Engineer to join our Core Experiences Team. This team builds and maintains the foundational services and SDKs that power Speechify’s product experience across platforms. It's a critical role for someone who enjoys working at the intersection of product and infrastructure, thinks strategically, and is passionate about designing clear, reliable APIs and simple systems that directly enhance the user experience.

What You’ll Do

• Collaborate with Speechify’s Product Teams to scope projects, find ways to reduce scope to get faster feedback from customers, navigate the integration/UX tradeoffs relevant to different product teams, and deliver solutions via our cross-platform SDK
• Optimize existing functionality to ship things like faster loading and more intelligent parsing by designing more efficient abstractions and improving our algorithms
• Ship cloud functions, lightweight backend services, and jobs using Kotlin

An Ideal Candidate Should Have

• Systems thinking. You know that optimizing a system requires end-to-end design, and you believe simplicity is valuable.
• Speed. You work quickly to generate ideas and options and know how to decide which things can ship now and what things need time
• Focus. We’re a high-growth startup with a busy, remote team. You know how and when to engage or be heads down
• Collaboration. You know how to inspire, play, and negotiate with opinionated designers, marketers, and PMs
• Preferred Tech Stack:
  • Kotlin Multiplatform (Java experience is OK but role is Kotlin Multiplatform) 
  • Prior experience with GCP is a plus

What We Offer

• A fast-growing environment where you can help shape the company and product.
• An entrepreneurial-minded team that supports risk, intuition, and hustle.
• A hands-off management approach so you can focus and do your best work.
• An opportunity to make a big impact in a transformative industry.
• Competitive salaries, a friendly and laid-back atmosphere, and a commitment to building a great asynchronous culture.
• Opportunity to work on a life-changing product that millions of people use.
• Build products that directly impact and support people with learning differences like dyslexia, ADD, low vision, concussions, autism, and more.
• Work in one of the fastest growing sectors of tech, the intersection of artificial intelligence and audio.

Think you’re a good fit for this job? 

Tell us more about yourself and why you're interested in the role when you apply.
And don’t forget to include links to your portfolio and LinkedIn.

Not looking but know someone who would make a great fit? 

Refer them! 

Speechify is committed to a diverse and inclusive workplace. 

Speechify does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.

The mission of Speechify is to make sure that reading is never a barrier to learning.

Over 50 million people use Speechify’s text-to-speech products to turn whatever they’re reading – PDFs, books, Google Docs, news articles, websites – into audio, so they can read faster, read more, and remember more. Speechify’s text-to-speech reading products include its iOS app, Android App, Mac App, Chrome Extension, and Web App. Google recently named Speechify the Chrome Extension of the Year and Apple named Speechify its Design award winner for inclusivity for 2025.

Today, nearly 200 people around the globe work on Speechify in a 100% distributed setting – Speechify has no office. These include frontend and backend engineers, AI research scientists, and others from Amazon, Microsoft, and Google, leading PhD programs like Stanford, high growth startups like Stripe, Vercel, Bolt, and many founders of their own companies.

Overview

With the growth of our Android app, being the most used text-to-speech app in the Play Store, we find the need for a Senior Android Engineer to help us support the new user base as well as work on new and exciting projects to push us forward.   

This is a key role and ideal for someone who thinks strategically, enjoys fast-paced environments, passionate about making product decisions, and has experience building great user experiences that delight users.

We are a flat organization that allows anyone to become a leader by showing excellent technical skills and delivering results consistently and fast. Work ethic, solid communication skills, and obsession with winning are paramount. 

Our interview process involves several technical interviews and we aim to complete them within 1 week. 

What You’ll Do

• Owning major features and working closely with our design team - take ownership of features inside the app and become responsible of delivering high quality features
• Shape the future of our Android team
• Own, maintain and improve reliability metrics for key features
• Participate in discussions across different teams - Product, Design, Engineering
• Review pull requests, and support other teammates
• Handle critical issues or cope with unexpected challenges 
• Take ownership of feature releases and provide nightly builds for the QA team

An Ideal Candidate Should Have

• 5+ years of software engineering experience
• Familiarity with Android components
• Experience building or contributing to at least one Android app
• Product design intuition and user empathy
• Drive to push the boundaries of Android UI/UX
• Understanding of the importance of tests and how to approach writing tests
• Self-drive to improve the app and codebase above and beyond what's outlined in the spec
• Rock solid experience with Kotlin, Kotlin Coroutines, Kotlin Flow, Dagger 2, MVVM, Clean Architecture, Background Services, Music Player Service, Android Animations, Jetpack Navigation, JUnit tests
• Excellent communication skills
• User oriented problem solving approach
• Driven with continuous feedback from leaders

Bonus:

• Experience building, maintaining, or otherwise contributing to open source projects in Android
• Experience with iOS, Web or NodeJS

Technologies we use:

• Kotlin
• Kotlin Coroutines
• Kotlin Flow
• Jetpack Navigation
• Dagger 2
• Room
• Custom Views, Canvas & Paint
• Jetpack Compose
• JUnit

What We offer:

• A fast-growing environment where you can help shape the company and product.
• An entrepreneurial-minded team that supports risk, intuition, and hustle.
• A hands-off management approach so you can focus and do your best work.
• An opportunity to make a big impact in a transformative industry.
• Competitive salaries, a friendly and laid-back atmosphere, and a commitment to building a great asynchronous culture.
• Opportunity to work on a life-changing product that millions of people use.
• Build products that directly impact and support people with learning differences like dyslexia, ADD, low vision, concussions, autism, and more.
• Work in one of the fastest growing sectors of tech, the intersection of artificial intelligence and audio.

Think you’re a good fit for this job? 

Tell us more about yourself and why you're interested in the role when you apply.
And don’t forget to include links to your portfolio and LinkedIn.

Not looking but know someone who would make a great fit? 

Refer them! 

Speechify is committed to a diverse and inclusive workplace. 

Speechify does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.

Responsibilities

We are looking for an exceptional Senior Backend Developer (Ruby) to join our growing Engine team. The Engine team develops and maintains most things related to Workato Recipe runtime. Everything related to recipe execution: DSL, pulling events, processing webhooks, executing jobs. There are various aspects to it: performance, scaling, storage, durability, atomicity, concurrency guarantees, data protection, and encryption. 

 In this role, you will also be responsible to:

• Build/extend/troubleshot/fix complex heterogeneous GOlang and Ruby applications, as well as small self-contained GOlang microservices.

• Improve execution engine of custom third-party code (Ruby DSL, isolation, performance, new features).

• Write well designed, testable, efficient code in Ruby and GOlang.

• Integration of data storage solutions Postgres/S3/DynamoDB/Kafka/ClickHouse etc.

• Contribute in all phases of the development lifecycle.

• Provide code reviews to your teammates.

• Provide technical leadership. Work with other teams on shared projects.

• Evaluate and propose improvements to existing systems.

• Identify bottlenecks and bugs, and devise solutions to these problems.

• Help maintain code quality, organization and automatization.

• We always explore new technologies and work with Rust and Wasm can be foreseen.

Requirements

Qualifications / Experience / Technical Skills

• Strong experience in building scalable distributed backend applications (7+ years).

• Excellent understanding of distributed systems patterns and algorithms.

• Great understanding of all building blocks of large web applications: databases, load balancers, application servers, message brokers, caching, monitoring, etc.

• Excellent understanding of network protocols and stacks.

• Excellent understanding of DB technologies: classic databases and modern no-SQL.

• Knowledge of all common basic data structures and algorithms and how they are used is a must.

• Multilingual programming experience: our code base is primarily in Ruby, with a trend to migrate to GOlang and Rust. At least two languages are required.

• At least basic understanding of cloud deployments (k8s, Terraform, ArgoCD)

• Experience of working with public cloud infrastructure providers(AWS/Azure/Google Cloud).

• Excellent debugging, analytical, problem solving, and social skills.

• BS/MS degree in Computer Science, Engineering or a related subject, 7+ years of industry experience.

Optional

• Background in GOlang, Rust, WASM.

• Background in network programming.

• Background in Kotlin/Multiplatform. 

• Background in application, data security.

• Deep knowledge of physical DB design.

• Experience of working with Docker and other isolation technologies.

• Experience in related fields (DevOps, ML, DBA, Enterprise applications, etc).

• Experience in building/deploying data processing pipelines is a plus.

• Experience of working with third-party REST APIs at scale (request throttling, batch processing etc).

Soft Skills / Personal Characteristics

• Ability to technically lead projects. Work with requirements, cost analysis.

• Readiness to work remotely with teams distributed across the world and timezones.

(REQ ID: 2343)

Yotpo helps brands turn first-time shoppers into lifelong customers through reviews and loyalty.
As we modernize the UGC Product House into a scalable, self-serve platform, our infrastructure becomes a critical priority. If you’re passionate about technical leadership, engineering excellence, people growth, and driving modernization across multiple teams, this could be your dream job.

Your Mission at Yotpo:

We are seeking an R&D Team Lead to drive technical modernization, improve developer experience, and elevate engineering quality across the UGC Product House. In this role, you will lead an engineering team, shape the modernization roadmap, and work closely with Experience Teams to enable fast, scalable, and reliable product value delivery across the UGC Product House.
This position blends people leadership, architectural direction, and hands-on technical contribution, while working in close partnership with Yotpo’s Infra teams and technical leadership to shape the future foundations of the UGC platform.

What you'll do:

• Modernization Roadmap & Planning: Define and align the modernization roadmap for the UGC Product House, ensuring clear prioritization, stakeholder communication, and strong collaboration with engineering and product partners.
• Team Leadership & Coaching: Lead the Infrastructure Modernization Team, providing mentorship, fostering technical growth, and shaping a high-performing engineering culture.
• Embedded Execution Model: Ensure the team successfully embeds within Experience Teams to execute modernization initiatives and architectural consistency, while promoting knowledge transfer.
• Hands-on Technical Contribution: Actively contribute to complex design, architectural work, POCs, and infrastructure modernization through consistent hands-on execution.
• Engineering Standards & Best Practices: Define, promote, and enforce engineering standards across the Product House, raising quality in areas such as scalability, reliability, performance, and maintainability.
• Reliability & Stability Enablement: Partner with Experience Teams to support and nurture long-term resilience and stability initiatives and culture.
• Developer Experience & Velocity: Drive improvements in tooling, CI/CD, observability, testing, and AI-assisted workflows to increase engineering velocity and reduce operational friction.
• Strategic Alignment: Ensure modernization efforts and infrastructure investments support the UGC strategic focus.
• Stakeholder Collaboration: Work closely with engineering, product, design, data, and cross-PH stakeholders to gather input, align priorities, and maintain transparency across teams.
• Cross-R&D Initiatives & Leadership Forums: Participate in R&D-wide leadership forums, contributing to cross-organizational decisions, knowledge sharing, and long-term engineering direction.

What You Bring:

• Experience & Leadership: 8+ years as a senior backend, platform, or infrastructure engineer, with at least 2 years leading engineers or driving cross-team technical initiatives.
• Modernization Expertise: Proven track record of leading modernization, replatforming, or large-scale technical transformation efforts in high-scale environments.
• Architectural Strength: Deep understanding of distributed systems, service architectures, and scalable backend design, with the ability to define and communicate architectural direction.
• Reliability & Stability Focus: Experience improving performance, reliability, operational hygiene, and reducing production noise across complex systems.
• Developer Experience Mindset: Passion for improving developer workflows, internal tooling, CI/CD pipelines, observability, and engineering velocity.
• Coaching & Mentorship: Strong ability to mentor senior engineers, elevate technical thinking, and create an environment that encourages growth and ownership.
• Collaboration & Influence: Excellent communication and stakeholder management skills, with the ability to influence without authority and align multiple teams.
• Strategic Problem-Solving: A long-term thinker able to balance modernization priorities with product needs, making pragmatic, data-informed decisions.
• Quality-Driven Approach: Deep commitment to maintainability, security, performance, and overall engineering excellence.

Technical Skills:

• Backend & Architecture: Expertise in Java/Kotlin, Node.js, Ruby on Rails, or similar technologies, with strong system design and architecture capabilities.
• Cloud & Infrastructure: Hands-on experience with AWS, Kubernetes, Terraform, CI/CD systems, and cloud-native operational practices.
• Data & Messaging: Familiarity with MySQL/PostgreSQL, Redis, Kafka, and event-driven or streaming architectures.
• Observability & Reliability: Strong understanding of logging, metrics, tracing, alerting, and resilience patterns.
• Developer Tooling: Experience with internal platforms, automation, quality gates, static analysis, and workflow/tooling improvements.
• AI-Assisted Development: Familiarity with GitHub Copilot, LLM APIs, and AI-driven developer acceleration workflows.

What we offer:

• Track to success – work in a dynamic organization with ambient and laid-back office atmosphere
• Individualized career development, rewards, and recognition.
• Work-life balance – 25 days paid vacation with add-ons for loyalty, regular team buildings and celebrations in and outside the country
• Additional health insurance package
• Internal mobility program and refer-a-friend program
• Managing a fixed monthly budget for social benefits thru Re:Benefit – a flexible online benefits solution
• Food vouchers
• E-learning portals and knowledge sharing sessions.
• Company backed Hackathons, Tech conferences, workshops events, etc
• Stocked kitchen and bar.
• Equity in options.
• Flexible hybrid capacity

If you don’t meet 100% of the qualifications outlined above, that’s okay! We believe in hiring people, not just skills. If you have a passion to learn and are excited about eCommerce and technology, then we want to hear from you.

Help us be the best version of Yotpo by building something great together!

Why us? 

Our company vision is to be recognized as the preeminent and most trusted digital agent for insurance comparison, purchase, and management.  Our team is critical to achieving our visio,n and fostering the right culture is essential to our team’s success.

How you will make an impact

• Work with our product team to architect and develop new mobile app features 
• Build and maintain our React Native application for iOS and Android
• Optimize existing features to improve performance, reliability, and user experience
• Write comprehensive unit, integration, and end-to-end tests
• Deploy to production often and contribute to improving mobile release processes

What you need to succeed

• 5+ years of professional software engineering experience
• Strong experience building mobile applications with React Native
• Experience working with Expo in production environments
• Understanding of mobile application fundamentals (performance, navigation, lifecycle, state management)
• Solid knowledge of TypeScript
• Experience integrating mobile apps with backend APIs
• Experience writing unit and integration tests
• Fluent spoken and written use of English and Bulgarian language

It would be considered a plus:

• Experience with Expo Application Services (EAS) for builds and releases
• Experience with mobile analytics, experimentation, or A/B testing
• Familiarity with push notifications, deep linking, and in-app messaging
• Experience with native iOS (Swift) or Android (Kotlin)
• Web development experience (we use Python, Django, React)

Benefits

• 25 days of annual leave
• Enhanced private medical, dental, and vision insurance plans
• Yearly wellbeing budget or Multisport card
• Personal budget for learning and books
• Employee Assistance Program and other wellbeing perks
• Office kitchen and fun area with snacks and beverages
• Regular social events
• Friendly office culture
• Hybrid office