DevBrother

About the Company

Our client is a financial technology services provider dedicated to expanding global access to digital assets by building innovative solutions in the cryptocurrency ecosystem. Their products provide exchanges, liquidity solutions, and enterprise-grade integrations for clients worldwide. Specialized in building Crypto, Web3, and various White-Label Solutions, we are looking for an enthusiastic Junior UI/UX Designer to join our engineering team.

In this role, you will have an excellent opportunity to gain hands-on experience in a rapidly growing organization. You will work alongside senior designers and engineers to translate complex financial concepts into intuitive web applications.

As a Designer, you will be a contributor to our development lifecycle. Your main responsibilities will include:

• Design Support: Creating user-friendly interfaces and functional mockups for our exchange and liquidity platforms.
• Prototyping: Help translate requirements and mockups into fully functional, enterprise-grade application designs.
• Collaboration: Work closely with a UI/UX team, product owners, and developers to ensure design consistency.
• Optimization: Optimize components for responsiveness across browsers and devices, with a focus on data-heavy interfaces.
• Team Participation: Actively participate in design reviews, stand-ups, and sprint planning to maintain high-quality standards and share knowledge.

Your AI & Automation Advantage

AI is a powerful co-pilot for modern design. We're looking for someone eager to use AI to supercharge their workflow—from generating assets to streamlining UX research and prototyping.

Who You Are

You are a proactive, detail-oriented, and adaptable designer who thrives in a fast-paced environment. You are:

• A Clear Communicator: You can effectively articulate design decisions and challenges to both technical teammates and non-technical stakeholders.
• A Problem-Solver: You are self-motivated, resilient, and enjoy tackling technical puzzles.
• A Tech Enthusiast: You have a curious mindset with a strong interest in (or passion for) blockchain, cryptocurrency, and financial technology.
• A Team Player: You value feedback and contribute positively to the team's shared goals and culture.

Qualifications

• English: Upper-Intermediate level or higher (both written and verbal).
• Experience: 1+ year of professional experience or a strong portfolio demonstrating UI/UX principles (ideally in fintech or complex web apps).
• Core Technical Skills:
  • Proficiency in modern design tools (e.g., Figma, Adobe XD).
  • Basic understanding of responsive design and grid systems.
  • Familiarity with collaborative workflows and version control concepts.
• Education: A Bachelor's degree in Design, Computer Science, or a related field (or equivalent practical experience).

Bonus Points:

• Knowledge of fintech, blockchain, or cryptocurrency environments.

We Offer

• Flexible Environment: Remote/Hybrid options with offices in Ukraine and Poland (Wroclaw) and flexible working hours.
• Healthcare: Medical Insurance in Ukraine and Multisport program in Poland.
• Support: Tax and accounting services for Ukrainian contractors.
• Growth: English classes up to three times a week, plus mentoring and educational programs.
• Culture: Regular corporate-level activities (parties, team buildings, tech events) and an advanced bonus system.

Role Overview

We are looking for a visionary Lead AI-Native Software Engineer to drive the development of high-performance financial platforms. You won’t just write code; you will architect scalable systems, lead the engineering team, and pioneer the use of AI to accelerate the development lifecycle. The ideal candidate is someone who treats AI tools as a standard part of their workflow to achieve 5x productivity and can navigate the complexities of Web3, Cybersecurity, and High-Frequency Trading environments.

Key Responsibilities

• Architectural Leadership: Design and build entire backend architectures for Crypto, FX, and DeFi trading platforms from scratch.
• AI-Driven Development: Implement and champion AI-native workflows (using tools like n8n, make.com, or LLM-assisted coding) to drastically reduce deadlines and optimize code generation.
• System Scaling: Own the performance and reliability of systems, ensuring they can handle 100k+ daily transactions and pass rigorous load tests.
• Product Ownership: Bridge the gap between technical execution and business value by defining MVP scopes, conducting market analysis, and creating detailed PRDs.
• Mentorship & Culture: Manage and mentor engineering teams, fostering a culture of "Deep Work," innovation, and high-speed delivery.
• Security & Compliance: Leverage a background in Cybersecurity to ensure all financial integrations and blockchain operations are secure.

Requirements

• English: Strong Upper-Intermediate or higher
• Languages & Frameworks: Expert-level proficiency in TypeScript, Node.js, and Nest.js.
• Cloud Infrastructure: Extensive experience with AWS (EC2, SQS, SNS, RDS, S3) and robust cloud architecture.
• Databases: Strong knowledge of PostgreSQL, MySQL, and MongoDB.
• Trading: Proven experience integrating trading systems with banks, fintechs, and blockchain providers.
• Automation: Hands-on experience with n8n, make.com, or similar automation platforms to streamline workflows.
• Education: Bachelor’s degree in Cybersecurity, Computer Science, or a related technical field.

Preferred Qualifications

• Hackathon Winner: A track record of success in major tech competitions.
• Community Leadership: Experience leading technical communities or mentoring developers in AI adoption.
• Strategic Thinking: Ability to make key decisions regarding risk management and revenue optimization.

What We Offer

• Opportunity to work on cutting-edge AI-integrated projects.
• A high-performance environment that values "Deep Work" over shallow tasks.
• Flexible remote work within European time zones.
• Healthcare & Wellness: Insurance in Ukraine and Multisport program in Poland.
• Location: Cozy and fully-equipped office in Ukraine and Poland (Wroclaw).
• Time Off: Paid vacation and sick leaves.
• Support & Growth: English classes (up to 3x weekly), mentoring, and educational programs.
• Perks: Necessary hardware provided, and an advanced bonus system.
• Community: Regular corporate activities, including amazing corporate parties, tech events, and sports.

Summary of the candidate profile we are looking for:

This role is for a "Force Multiplier" — a developer who uses AI to deliver at the speed of a whole team, understands the nuances of financial risk, and can lead a project from a blank page to a scaled production environment.

We are looking for a motivated software engineer to join our engineering team. In this role, you will work across our entire stack to build products that are changing how users interact with the web safely. This is a perfect opportunity for an experienced developer ready to take on greater ownership and work with a modern, specialized tech stack.

The Role

You will be an integral part of our agile team, contributing to everything from our browser extension logic to our backend data pipelines. You’ll be expected to write clean, maintainable code, participate in design discussions, and help us scale our security-focused solutions.

Responsibilities:

• Feature Development: Design and implement product features across the full stack (React, Node.js, and C#).
• Code Excellence: Contribute to and uphold our code quality standards through thorough testing and thoughtful peer reviews.
• Rapid Problem Solving: Debug complex issues and ship fixes quickly to maintain a seamless user experience.
• Collaborative Engineering: Partner with teammates to brainstorm and solve architectural challenges creatively.
• Codebase Evolution: Take ownership of extending and optimizing our existing codebase as we add new capabilities.

Qualifications

• Experience: 2–4 years of professional software development experience.
• Education: BS/BA in Computer Science or a related field, or equivalent practical experience.
• Core Stack: Proven proficiency in TypeScript, Node.js, and React. 
• C# / .NET: Familiarity with the .NET ecosystem for backend services.
• Databases: Experience working with SQL databases, ideally PostgreSQL.
• Cloud & Tools: Comfort working in AWS environments and familiarity with Git and Jira.
• Communication: Strong verbal and written communication skills with a collaborative mindset.
• Drive: Self-motivated and capable of hitting the ground running in a fast-paced environment.

Our Tech Stack

We lean into modern tools to build fast and stay secure:

TypeScript · Node.js · React · PostgreSQL · AWS · Plasmo · C#/.NET

​Nice to Have

If you have experience in any of the following, you'll have a head start:

• ​Browser Extensions: Experience building or maintaining extensions (especially using frameworks like Plasmo).
• ​​Cybersecurity Knowledge: Interest or experience in data loss prevention (DLP), DNS security, or credentials analysis.
• ​Startup Savvy: Experience working in a startup or a similarly fast-moving environment.
• Design Literacy: Familiarity with Figma to help translate designs into functional code.

🎁 We Offer

• Growth: Daily support for your technical and personal growth through mentoring and educational programs.
• Team Culture: A professional and friendly environment where help is always available.
• Medical Insurance in Ukraine and Multisport program in Poland.
• Offices in Ukraine (Kyiv, Kharkiv) and Poland (Wroclaw) or Remote.
• Paid vacation, sick leaves, and official holidays.
• Legal & Accounting services.
• The company provides all necessary equipment.
• English classes and Education reimbursement.

We are building a foundational permission layer for agent-driven finance. As AI agents move from simple chatbots to autonomous financial actors, the world needs a secure way to manage them.

Our platform allows users to delegate financial tasks—managing subscriptions, enforcing spending limits, and executing transactions—to AI agents while maintaining full custody and control. We are solving the "trust gap" through a proprietary, privacy-preserving identity system that ensures security without exposing personal data.

The Role: "Airdrop" Ready

This is a high-stakes, foundational hire. We need a Senior Full Stack Engineer who can be "airdropped" into a complex stack and take immediate ownership. You will work directly with the Co-founders (CEO and CTO) and the Head of Engineering to shape a system designed for sub-second settlement and mission-critical security.

Hard Requirements (Non-Negotiable)

Since we are in a high-velocity phase, we need someone who can hit the ground running on day one.

• 5+ Years of Experience: A proven track record of shipping production-grade systems in fast-paced startup or scale-up environments.
• Technical Core: High proficiency in Python and TypeScript.
• Domain Expertise: Direct, hands-on experience with:
  • Web3 Applications: Deep understanding of decentralized architectures.
  • Security-Sensitive Systems: Building systems where data integrity and security are the top priorities.
  • Cloud Infrastructure: Proven ability to manage deployments and scale infrastructure.
• The "Why" Factor: You possess a product-first mindset. You don't just build to spec—you question whether this needs to be built and how it will affect the system as a whole.

Team & Culture

We are a sociable, high-energy team that believes the best engineering happens when people collaborate in person.

• The Hub: Our engineering and ops teams work out of a vibrant office in Holborn.
• Social Fabric: We are a tight-knit group that enjoys Friday drinks.
• Velocity: We operate with a "startup pace" mentality. If you thrive in environments where decisions are made fast and ownership is absolute, you’ll fit right in.

Why Join This Project?

• Foundational Role: You will be one of the first 10 members of the team, significantly influencing the technical roadmap.
• Cutting-Edge Tech: Work at the intersection of AI agents, Privacy/Identity, and high-performance FinTech.
• Ownership: High autonomy and the opportunity to build a new category of financial infrastructure.

Our client is a financial technology services provider dedicated to expanding global access to digital assets by building innovative solutions in the cryptocurrency ecosystem. Their products provide exchanges, liquidity solutions, and enterprise-grade integrations for clients worldwide. We are looking for a skilled Python/Data Analyst to help us translate complex financial and blockchain data into actionable insights and high-performance solutions.

In this role, you will be a core member of our engineering team, solving complex technical puzzles and building robust data models in a fast-paced environment.

What You'll Do

You will be a key builder in our data lifecycle, applying your technical expertise to optimize our core products. Your main responsibilities will include:

• Data Analysis & Modeling: Develop and maintain data pipelines and analytical models for our exchange and liquidity platforms using Python.
• Insight Generation: Translate complex financial concepts and large datasets into intuitive reports and actionable business insights.
• Collaboration: Work closely with product owners, backend engineers, and stakeholders to translate requirements into fully functional, enterprise-grade data solutions.
• Performance & Optimization: Optimize data queries and processing scripts for maximum performance and scalability, paying close attention to real-time crypto interfaces.
• Quality Standards: Write clean, testable, and efficient Python code, actively participating in code reviews and sprint planning.

Your AI & Automation Advantage

We believe AI is a powerful co-pilot for modern development. We’re looking for someone eager to use AI to supercharge their data analysis, automate repetitive tasks, and stay ahead of the curve.

Who You Are

You are a proactive, detail-oriented, and adaptable analyst who thrives in a fast-paced environment. You are:

• A Clear Communicator: You can effectively articulate complex technical decisions and data findings to both technical teammates and non-technical stakeholders.
• A Problem-Solver: You are self-motivated, resilient, and have strong critical thinking skills to tackle complex technical puzzles.
• A Tech Enthusiast: You have a curious mindset with a strong interest in (or passion for) blockchain, cryptocurrency, and financial technology.
• A Team Player: You value collaboration and feedback, contributing positively to the team's shared goals and engineering culture.

Qualifications

• English: Upper-Intermediate level or higher (both written and spoken).
• Experience: 3+ years of professional experience in data analysis or software development, with a strong focus on Python.
• Core Technical Skills:
  • Proficiency in Python and its data libraries (e.g., Pandas, NumPy).
  • Strong experience with SQL and managing complex databases.
  • Familiarity with RESTful APIs and real-time data communication (e.g., WebSockets).
  • Proficient with Git version control and collaborative workflows.
• Education: Bachelor’s degree in Computer Science, Data Science, Mathematics, or a related field (or equivalent practical experience).

We Offer

• Flexibility & Location: Offices in Ukraine and Poland (Wroclaw) with flexible working hours.
• Health & Wellness: Medical Insurance in Ukraine and Multisport program in Poland.
• Time Off: Paid vacation, sick leaves, and all official holidays.
• Professional Development: English classes up to three times a week, plus mentoring and educational programs.
• Support: Tax and accounting services for Ukrainian contractors.
• Equipment: The company provides all necessary high-end equipment.
• Culture: Regular corporate activities, including corporate parties, tech events, and an advanced bonus system.