Responsibilities

• Perform Test Analysis, Design and Implementation of test cases
• Maintain, update & extend existing automation framework
• Analyze, investigate and report defects on failures
• Monitoring of test automation results
• Close collaboration with other stakeholders
• Handle concurrent projects with differing levels of urgency

Qualifications, Skills & Attributes

Minimum qualifications:

• Proficient knowledge and hands-on experience with Java and Python
• Strong understanding of OOP fundamentals and design pattern applications
• Experience with writing either unit tests or UI tests
• Bachelor's degree in computer science, physical science or engineering
• Good verbal and written communication skills in English

Preferred qualifications:

• Experience with test automation of Desktop applications
• Experience with test automation of Mobile applications (iOS & Android)
• Experience with test automation of Web applications
• Experience with at least one automation tool like TestComplete, Ranorex, Squish, Katalon etc.
• Experience with test automation libraries like Selenium, Robot, Cypher
• Working knowledge of Git (GitLab, Bitbucket etc.)
• Experience with JIRA and Confluence
• Basic experience in JavaScript, Groovy
• Experience with Squish
• Experience with CI/CD pipelines like Jenkins
• Experience with build tools like Ant, Maven etc.
• Basic user knowledge of Unix

Company Benefits & Perks 

• Discretionary, performance based bonus
• Private health insurance, sport activity compensation 
• Stock incentive plan
• Daily food allowance in the office
• Great atmosphere with friendly and exceptional colleagues and frequent company outings.

*The benefits package will be reviewed regularly and may be subject to change.

The Game Designer, Mathematician is a senior individual contributor responsible for designing the functional mechanics and mathematical models of original online casino games developed by RSI’s in-house game studio. The Game Designer defines features, bonus structures, paytable economics, and underlying math models that determine how games play, perform, and engage players, while also contributing to the design and optimization of site-wide promotional and gamification mechanics that reflect the RSI brand.

The Game Designer owns the full functional design-to-model lifecycle for each game, from initial concept and feature design through mathematical modeling, PAR sheet creation, simulation validation, and iterative tuning, in close collaboration with engineering, product, and creative teams. The position requires deep expertise in casino game mathematics and mechanics design, as well as the ability to develop compliant games within a fast-paced, regulated environment while delivering engaging, commercially viable player experiences aligned with the RSI brand.

What You'll Do:

• Design and define the functional mechanics for original online casino games, including base game structures, bonus round triggers and flows, progressive jackpot systems, gamble features, cascading/grid-style mechanics, and meta-game experiences
• Build the complete mathematical models for each game, including RTP targets, volatility profiles, hit frequency, standard deviations, prize distribution, and payout structures
• Create and maintain PAR sheets, combination sheets, and all regulatory math documentation required for internal review, testing laboratory certification and regulatory approvals
• Define symbol hierarchies, paytable structures, reel layouts (including non-traditional formats such as grid slots and cluster-pay), win-line configurations, and feature trigger conditions
• Build and run simulation code (Python, C++, C#, Javascript, or equivalent) to validate math models, verify behavior across gameplay scenarios, and test edge cases
• Write demo and prototype code to rapidly test mechanic concepts before full production commitment
• Evaluate existing casino concepts for adaptation into RSI’s online real money gaming environment
• Create comprehensive Game Design Documents (GDDs) and functional specifications for engineering, art, audio, and production teams
• Ensure all math models meet regulatory requirements across RSI’s operating jurisdictions, adapting designs for market-specific RTP ranges, win caps, odds requirements, and fairness standards
• Play-test and iterate on in-development games, providing feedback on math balance, mechanic feel, feature pacing, and edge case behavior
• Analyze post-launch game performance data and recommend math and mechanic adjustments to live games
• Maintain and contribute to RSI’s internal game design standards and style guides
• Collaborate with creative leads by providing functional specifications and mechanic requirements that inform visual and thematic direction
• Work with software engineers to verify math implementation in code and review game software during development
• Partner with designers and product managers to brainstorm concepts, refine games in progress, and share best practices

What You'll Bring:

• Bachelor’s degree in mathematics, statistics, applied mathematics, computer science, physics, engineering, or a closely related quantitative field required. Master’s degree or higher in a quantitative discipline preferred.
• 8+ years of direct, hands-on experience in slot game design and/or slot game mathematics within a land-based or online casino game studio environment. This is a non-negotiable requirement — candidates without direct slot game experience will not be considered.
• Expert-level knowledge of casino game mathematics: RTP calculation, volatility modeling, hit frequency analysis, standard deviation, prize distribution, combinatorics, and probability theory
• Proven ability to design engaging slot game mechanics across different gambling concepts and styles, including innovative feature structures, bonus flows, progressive/jackpot systems, and paytable economics
• Proficiency in building and running game math simulations and verification scripts using Python, C++, C#, Javascript or equivalent programming languages
• Advanced Excel skills for probability modeling, paytable prototyping, and large-dataset analysis
• Deep familiarity with PAR sheet creation and regulatory documentation standards for online and/or land-based slot games
• Strong understanding of player psychology, behavioral engagement patterns, and what makes slot games commercially successful
• Excellent communication skills with the ability to translate complex mathematical concepts into clear documentation for both technical and non-technical audiences #LI-REMOTE #LI-PROMOTE

We are looking for a Product Designer with exceptional UI skills to work on Bolt web pages in collaboration with our Product and Brand teams. This role is a unique opportunity to work across all of Bolt’s products and services, as they are all represented on the web.

With over 200 million users 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 ability.

Our ultimate goal is to make cities for people, not cars. And we need your help on this mission!

In this role, you will be responsible for all public web pages, including product and feature pages (e.g. Ride-hailing, Micromobility, Delivery), their conversion and discoverability via the main navigation. To achieve this, you will collaborate with product designers and other stakeholders from different teams. Additionally, you will support our Brand team in designing campaign pages.

This role requires you to understand user needs, create prototypes, suggest improvements based on user behaviour and analytics, and turn concepts into high-quality, user-friendly solutions.

• Building and maintaining Bolt’s design language for web products and ensuring its adoption across all our domains.
• Making sure that all our external-facing web pages are aligned to our prescribed ‘house style’ and audience tone of voice.
• Improving solutions step by step with testing prototypes early and A/B tests constantly.
• Supporting platform engineers working in an agile environment to implement your design specifications.
• Ensuring a consistent and highly optimised user experience at all times.
• Conducting content audits to identify opportunities and drive consistency across our products.

• You have experience working on web products related to user acquisition; generating  delightful ‘AHA!’ and ‘WOW!’ moments in the process.
• You're experienced in design tools and software, including Figma, Adobe. You’re comfortable animating micro-interactions and building prototypes ready for hand-off.
• You have a good understanding of web development technologies (HTML, CSS, JS) and frameworks such as React.
• You know the difference between AA and AAA WCAG requirements and how to apply them to your designs, ensuring that developers have all the necessary assets and guidelines.
• You are passionate about emerging technologies, design trends and eager to apply this knowledge to your work.
• You can communicate fluently in English and your exceptional collaboration skills enable you to effectively work with cross-functional teams and influence stakeholders.

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!

• 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.

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.

Position Overview

The Shopify Developer is the technical engine behind our global digital storefronts. You will manage the technical evolution of both our B2B and Retail platforms, ensuring they are fast, accessible, and optimized for conversion. This role is central to our global expansion; you will spearhead the implementation of Shopify Markets and customize theme logic to meet the unique needs of international territories. We are looking for a self-motivated problem solver who bridges the gap between creative design and high-performance code.

Key Responsibilities

Theme Development & Optimization

• Build & Launch: Develop high-fidelity, responsive landing pages and custom theme sections to support marketing campaigns.
• Performance Engineering: Implement code-level improvements to enhance site speed (Core Web Vitals) and ensure full ADA compliance across all digital touchpoints.
• Technical SEO: Maintain best-in-class search visibility through optimized Liquid templates and structured data (JSON-LD).
• B2B & Retail Logic: Develop and maintain distinct theme customizations that cater to the different shopping behaviors of our wholesale and retail customers.

Global Expansion (Internationalization)

• Shopify Markets: Lead the technical setup and configuration of Shopify Markets to support multi-currency, multi-language, and regional content.
• Localization Logic: Architect theme solutions that adapt seamlessly to regional requirements without compromising global site stability or customer experience.

Collaboration & Code Quality

• Cross-Functional Partnership: Work closely with Marketing and Operations to translate business goals into technical solutions.
• Code Reviews: Actively participate in peer code reviews to ensure maintainability, security, and adherence to best practices.
• Documentation: Maintain clear documentation for custom integrations and theme modifications.
• Maintenance & Troubleshooting: Act as the first line of defense for support requests and bug fixes, identifying root causes to prevent recurrence.

Qualifications

Required:

• Core Stack: Strong foundational programming logic; you understand how to structure data and build for scalability, not just 'making it look right'. Exceptional proficiency in HTML, CSS, and JavaScript (Vanilla/ES6).
• Growth Mindset: A documented history of being a self-motivated, fast learner. You aren't afraid to dive into the "unknown" and enjoy tackling complex technical puzzles.
• Project Execution: A proactive self-starter who excels in an evolving roadmap. You enjoy seeing your work go live quickly and can effectively prioritize multiple workstreams to meet milestones during busy launch windows.
• Hybrid Collaboration: Strong verbal/written English. While based in Estonia, you must be comfortable working primarily via Google Meet and chat, collaborating with stakeholders across different time zones.

AI-Augmented Development: An active interest in the evolving landscape of AI-powered development. You are open to experimenting with agentic code editors like Cursor and understand how to leverage AI for debugging and documentation without compromising on fundamental engineering principles. 

Resourcefulness: Resourceful and autonomous; you are the type of developer who consults documentation, experiments with APIs, and finds the 'why' behind a bug before asking for a solution.

Preferred:

• Shopify Experience: 1+ years of professional Shopify development experience (Liquid, JSON schema, Shopify APIs).
• Code Portfolio: A portfolio or GitHub that demonstrates clean code and creative problem-solving (even if it’s not Shopify-specific).
• Modern Tools: Experience with React, version control (Git), and CI/CD workflows
• Global Collaboration: Experience working with distributed teams across varying time zones.
• Ownership & Accountability: You take pride in the stability and performance of our global storefronts, maintaining 100% accountability for the code you ship to production.
• Solution-First Thinking: You don’t just patch a bug; you investigate the root cause and implement long-term fixes that improve the overall health of the codebase.
• Continuous Learning: You stay curious about the evolving Shopify ecosystem and emerging web technologies, proactively suggesting ways to modernize our stack.
• Integrity & Confidentiality: You uphold high standards regarding the security of our customer data, proprietary logic, and upcoming product launches.

What we offer:

• Global & Supportive Culture: Grow alongside an innovative, industry-leading international brand.

• Hybrid Work: Hybrid work, 3 days  at vibrant office hub in Ülemiste, Tallinn.

• Premium Well-being: 6 paid wellness days, mental health support, bi-weekly team lunches, and your choice of a sports allowance or private health insurance.

• Extra Time Off: Paid time off for your birthday, plus 4 paid "Recharge Fridays" off per year.

• Career Growth: Dedicated professional development and continuous learning opportunities.