World-class customer service is one of the cornerstones of Wolt 💙 Over the years we have invested a lot in our in-house built support tooling. Why? Because we're convinced it's the secret sauce that ensures smiles on the faces of our customers and partners across all 30 countries that we operate in. We take huge pride in our customer operations’ quality, so on top of building delightful support experiences in our consumer app we also aim to uncover and tackle issues before our customers and partners even notice something might be wrong.

In a nutshell, the Support Productivity team is building world-class internal tools for our customer, merchant and courier support. Support is a big deal for us and we will do our best to keep our 25M+ registered customers, 200.000+ courier partners, and 100.000+ restaurant and retail partners happy. Support Productivity is a new team is playing a key role in this equation and it takes some real serious work from our dedicated support teams in each of the 30 countries to ensure the satisfaction of those customers and partners 

We are building several admin applications on top of our inhouse chat application to provide a custom support platform that is scalable, reliable and efficient. Our tool supports several thousand concurrent users on top of our in-house chat application built to serve 20mil+ conversations each month. 

So, if you're ready to roll up your sleeves and craft tools that match the same level of quality and passion we dedicate to creating our external solutions, you've found your tribe at Wolt! 💙

📍This role can be based in our tech hub in Tallinn or Helsinki.

Key Responsibilities:

1. Develop responsive and user-friendly interfaces using modern frameworks such as React + TypeScript
2. Collaborate with cross-functional teams to translate designs and requirements into functional features.
3. Ensure performance, scalability, and accessibility of web applications across browsers and devices.
4. Debug, test, and maintain codebases to ensure reliability and quality.
5. Stay updated with frontend technologies and implement best practices.

Our humble expectations

• Frontend experience with focus on React.js and TypeScript,
• Testing experience is considered as a plus (unit testing - Jest, react-testing-library),
• Experience in building scalable and efficient frontend applications 
• Curiosity and willingness to learn
• Ability to communicate effectively with stakeholders
• Product thinking - you should not only do what’s being told, but participate in conversations, and challenge the proposed solutions

Nice to have:

• Experience with backend is a benefit (NodeJs, Python, MongoDB). 

Next steps:

These positions will be filled as soon as we find the right persons, so make sure to apply as soon as you realize you really, really want to join us!

About the Role:
We’re looking for a Backend Engineer to contribute to a next-generation security initiative. You’ll be part of a small, highly technical team working on novel approaches to secure systems - with a focus on cryptography, automation, and AI-powered analysis. You’ll work closely with senior engineers and contribute hands-on to the codebase across the stack. This role involves hands-on development, learning opportunities, and collaboration across engineering, product, and design.

Day to Day:

• Contribute to the design, development, and delivery of features across the product
• Write clean, maintainable code for back-end systems deployed in AWS or GCP
• Collaborate with AI and cryptography specialists
• Work with the product manager to understand requirements and help the team plan architecture, data flows, API specs, and testing strategies
• Follow established engineering practices and participate in team discussions around process and quality
• Participate in customer-driven development and iterate based on feedback
• Write automated tests for load, performance, and error handling

What you bring to the table:

• 3+ years of hands-on software engineering experience for backend development
• Excellent TypeScript and Node.js coding experience
• AWS experience in containers (EKS, ECS) and serverless systems
• Relational, key/value, and graph datastore experience with schema management
• API design, data modeling, secure service development, database systems
• Has a focus on quality code, error handling, and high availability
• A thoughtful, pragmatic approach to solving technical problems in a fast-paced environment
• At least upper-intermediate level of spoken and written English

Extra Credit:

• Versed in Python coding and environments
• Experience with GCP systems
• Experience with applied cryptography, especially key management, TLS, or post-quantum algorithms
• Familiarity with agent-based architectures or systems that scan and orchestrate actions across distributed environments
• Knowledge of AI/ML systems, particularly LLM integration or agent-style reasoning patterns
• Experience managing LLM agents to increase both speed and quality of code generation and tests
• Exposure to security tools, vulnerability detection platforms, or compliance automation
• Prior experience working on developer-facing or infrastructure-heavy products

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.

We are looking for an experienced Senior Full Stack Software Engineer to join our teams in Tallinn. Bolt engineering teams are working on unique product challenges: complex algorithms for demand prediction, optimal real-time pricing, routing, fraud detection, distributed systems and much more.

With over 200 million customers in 50+ countries, Bolt is one of the fastest-growing tech companies in Europe and Africa. And it's all thanks to our people.

We believe in creating an inclusive environment where everyone is welcome, regardless of race, colour, religion, gender identity, sexual orientation, national origin, age, or disability.

Our ultimate goal is to make cities for people, not cars, and we need your help to achieve this mission!

As a Senior Full Stack Engineer, you will be responsible for architecting, designing, developing, and deploying Bolt's growing backend and frontend systems. That will mostly happen via coding in Node.js and TypeScript (PS: no previous experience with Node.js is needed).

• Designing and building Bolt's growing backend and frontend systems.
• Coding mostly in TypeScript (previous experience with Node.js / React / React-Native is not required, but always welcomed.
• Paying attention to detail, proactively fixing upcoming bugs and solving technical challenges.
• Contributing ideas to our product development roadmap.
• Giving a hand to your fellow colleagues, participating in code reviews and architecture discussions.

We are not really looking for Node.js experts, but for cross-language engineers for whom a specific stack is just a tool to solve a problem, not the solution itself.

• You have experience in JavaScript and Node.js / C++ /Java or any OO language.
• You have knowledge of major frontend frameworks and experience with API design and development.
• You have a university degree in a technical subject (Computer science, Mathematics or similar).
• You have 4+ years of experience in software development.
• You have good English and communication skills.
• You have solid understanding of algorithms, data structures, experience with any SQL (MySQL/PostgreSQL).

Experience is great, but what we really look for is drive, intelligence, and integrity. So even if you don’t tick every box, please consider applying if you feel you’re the kind of person described above!

• Play a direct role in shaping the future of mobility.
• Impact millions of customers and partners in 600+ cities across 50+ countries.
• Work in fast-moving autonomous teams with some of the smartest people in the world.
• Accelerate your professional growth with unique career opportunities.
• Get a rewarding salary and stock option package that lets you focus on doing your best work.
• Enjoy the flexibility of working in a hybrid mode with a minimum of 2 days in the office each week to foster strong connections and teamwork.
• Take care of your physical and mental health with our wellness perks.

*Some perks may differ depending on your location and role.