Jobs at Djinni

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

Design and develop full-stack applications using Java + React.
- Build REST APIs following microservice standards.
- Implement user interfaces using Nexus design system.
- Refactor legacy components for modernization and performance. - Collaborate with architects to define scalable solutions.

- Participate in code reviews, testing, and sprint ceremonies.
- Optimize application reliability, performance, and maintainability. 

Skills
- Strong in Java, Spring Boot, REST API development. (4+ years of commercial experience)
- Expertise in React, JavaScript/TypeScript, UI state management.
- Experience with Nexus design system or similar component systems. - Understanding of cloud-native development and containerization.
- Knowledge of CI/CD, Git workflows, automated testing.
- Familiarity with security best practices for APIs.
- Good understanding of system integration patterns.

We’re collaborating with a leading company in financial crime prevention and fraud detection. Their platform empowers businesses to assess risk in real time, processing millions of data points per second to detect and prevent fraudulent activity on a global scale.

Currently, we are in the migration phase, modernizing the API infrastructure to ensure seamless compatibility between legacy and new systems. After this phase, we’ll move into platform enhancement, focusing on performance optimization, feature expansion, and system scalability.
 

You’ll join a highly skilled team working on real-world challenges with high-load systems, modern cloud-native solutions, and advanced communication protocols. This is an excellent opportunity for someone eager to grow fast and gain hands-on experience with cutting-edge technologies in a demanding but rewarding environment.
 

Project Highlights:

• Current focus: Migration and modernization of legacy API infrastructure.
• Next phase: Platform enhancement, scalability improvements, and feature development.
• Load profile: High throughput, real-time fraud detection.
• Team: Back-End, Front-end Developers, Solution Architect, Project Manager.
• Methodology: Agile (Scrum)/Kanban, 1-week sprints, daily stand-ups, regular demos.
• Tooling: Slack, Jira, Google Meet.
   

What You’ll Do:

• Take ownership of the backend domain, driving technical vision and architecture decisions.
• Design and implement scalable, cloud-native Kotlin-based microservices.
• Collaborate with Solution Architect on system design and long-term scalability strategies.
• Partner with stakeholders and product owners to align priorities, plan roadmaps, and deliver business value.
• Lead full-cycle delivery of fixed-price projects from kickoff to final delivery.
   

What We’re Looking For:

• Strong expertise with Kotlin and Spring Boot in production environments.
• Deep knowledge of microservices architecture, API development, and cloud platforms.
• Advanced understanding of Kafka (including Kafka Connect), gRPC, and Protobuf for real-time, high-throughput systems.
• Experience optimizing data layers with PostgreSQL, Yugabyte, and jOOQ.
• Hands-on experience with Kubernetes, AWS, GCP, and containerized environments.
• Strong architectural mindset with ability to balance technical depth and business needs.
• Excellent communication and stakeholder management skills.
• Passion for mentoring and developing engineering talent.
   

Why Join FreySoft?

🌍 International team within the EU time zone, flexible schedules.

🚀 Cutting-edge technologies and high-load, real-world challenges.

🎯 Growth-focused culture — grow into leadership, own features, or mentor juniors.

💡 Innovative environment — leverage AI/LLM tools to boost development speed and quality.

💰 Competitive compensation based on experience and skills.

🤝 Collaborative and professional team that values initiative, autonomy, and continuous learning.
 

At FreySoft, we believe in empowering developers to drive innovation and grow through real impact. If you’re passionate about backend development, love solving complex problems, and want to work with some of the most modern tools in the industry — let’s talk.

We're looking for a Team Lead Media Buying FB to join our team!

Requirements:
- 4+ years of hands-on experience in iGaming with Meta Ads (Facebook & Instagram).
- Strong performance marketing background (not branding or awareness).
- Proven experience working with ROAS/CPA goals
- Deep understanding of Meta auction mechanics and delivery
- Experience with pixel events, CAPI, postbacks, and tracking tools
- Experience working with multiple GEOs and different market tiers is a must.

Responsibilities:
- Lead and manage a team of 4+ Facebook Media Buyers
- Own team performance across spend commitments, with a strong focus on ROAS-driven KPIs
- Define buying strategy, review performance, guide optimization decisions, and support scaling
- Act as the main point of contact for clients
- Translate client business goals into clear media buying tasks and KPIs
- Present performance results, insights, and optimization plans to clients
- Manage and maintain the in-house Facebook system to ensure accurate spend tracking and reporting

Our benefits to you:

☘️An exciting and challenging job in a fast-growing group of companies, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance and more
🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed
🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided
🏖Paid vacations, sick leave, personal events days, days off
💵Referral program — enjoy cooperation with your colleagues and get the bonus
📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences
🎯Rewards program for mentoring and coaching colleagues
🗣Free internal English courses
✈️In-house Travel Service
🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, PIN-UP clubs for movie / book / pets lovers and more
🎳Other benefits could be added based on your location

Our Mission and Vision

At Solidgate, our mission is clear: to empower outstanding entrepreneurs to build exceptional internet companies. We exist to fuel the builders — the ones shaping the digital economy — with the financial infrastructure they deserve. To achieve that, we’re on a bold path: to become the #1 payments orchestration platform in the world.
 

About the Team and Role

You’ll join the Billing team and take ownership of the Taxes module — a core part of our billing system responsible for tax calculation and reporting across multiple locations.

The product has already moved beyond MVP and is actively used by customers. The foundational logic is in place, demand is high, and the next step is scaling functionality and reliability.

This role is exciting because you’re not maintaining legacy code — you’re building and shaping a critical system almost from scratch.
You will have a clear path to Lead: full ownership of the Taxes direction, architectural decisions, and growing a team around it.

Your team — Product Owner, 1 Senior Engineer, Automation QA, and Tax Manager.

Explore our technology stack ➡️ https://solidgate-tech.github.io/
 

What you’ll own

Your focus will be on:

• building tax calculation and reporting logic
• integrating third-party tax providers
• improving system resilience and uptime
• making architectural decisions and setting technical direction
• mentoring engineers as the team grows

In the first months, you’ll deliver key tax functionality and lay a solid foundation for future product and team growth.

We rely on automated testing over manual QA — unit, integration, functional, and e2e tests are a core part of how we ship and scale safely.
 

You’re a great fit if you have

• 4+ years of backend engineering experience
• 1.5+ years of commercial Go development
• Strong understanding of high-load system design
• Solid experience with PostgreSQL
• Experience with queues or streams
• Strong testing culture: unit, integration, functional, e2e
• Proactive, independent, result-oriented mindset

Nice to have

• Kafka
• AWS services
• CI/CD pipelines
• Fintech / payments / financial domain experience
• Understanding of VAT, GST, Sales Tax
   

Why Solidgate?

High-impact role. You’re not inheriting a perfect system — you’re building one.

Great product. We’ve built a fintech powerhouse that scales fast. Solidgate isn’t just an orchestration player — it’s the financial infrastructure for modern Internet businesses. From subscriptions to chargeback management, fraud prevention, and indirect tax — we’ve got it covered. We hold financial licenses in key regions and are a direct Visa & Mastercard partner and sub-reseller (top 5 globally).

Massive growth opportunity. Solidgate is scaling rapidly — this role will be a career-defining move.

Top-tier tech team. Work alongside our driving force — a proven, results-driven engineering team that delivers. We’re also early adopters of cutting-edge fraud and chargeback prevention technologies from the Schemes.

Modern engineering culture. TBDs, code reviews, solid testing practices, metrics, alerts, and fully automated CI/CD.
 

💌 The Extras: 30+ days off, unlimited sick leave, free office meals, health coverage, and Apple gear to keep you productive. Courses, conferences, sports and wellness benefits — all designed for ideas, focus, and fun.
 

Tomorrow’s fintech needs your mindset. Come build it with us.

Location: remotely from  Latvia, Lithuania, lower priority - Spain/Portugal/Romania/Slovakia/Hungary/Czech Republic!!!

Start Date: 1 March

Duration: Until end of September 2026 (option to extend)

Allocation: Full-time

Role Overview

We are looking for a hands-on Tech Lead to support the Data, AI, and Ingestion team. This role is critical to ensuring smooth day-to-day technical execution while acting as a bridge between engineering, product, and leadership.

The ideal candidate has a strong technical background and has previously worked as a developer before moving into a leadership role.

Key Responsibilities

• Provide technical leadership and hands-on support to the Data, AI, and Ingestion team
• Actively participate in day-to-day development and technical decision-making
• Raise and manage technical and delivery escalations
• Work closely with the Product Owner and Principal Engineer
• Guide developers on best practices, architecture, and code quality
• Support planning, estimation, and prioritization activities
• Ensure delivery aligns with agreed architecture and quality standards

Required Skills & Experience

• Strong background as a Backend Developer (Java/JVM ecosystem)
• Previous experience as a Tech Lead, Engineering Lead, or Technical Project Manager
• Solid understanding of backend architectures and data-driven systems
• Experience working closely with Product Owners and senior engineering stakeholders
• Ability to be hands-on when needed and lead by example
• Strong communication and stakeholder management skills

Nice to Have

• Exposure to Kotlin (not mandatory)
• Experience with data platforms, ingestion pipelines, or AI-related systems
• Cloud-native experience

#Asterisk Administrator #voip
#Remote position
Salary 2000 USD
Candidates willing to consider relocation to Cyprus are welcome

About the role
We are looking for an experienced Asterisk Administrator to support and develop the telephony platform of a fintech service. The role involves working with production VoIP systems that support support teams collections and sales operations. You will be responsible for stability scalability security and deep integration with business systems.

Required skills and experience
At least 3 years of hands-on experience with Asterisk
Strong practical experience with Asterisk versions 13 16 or 18 and higher
Proven experience building and maintaining VoIP systems for support call centers or fintech environments
Confident understanding of SIP RTP NAT and QoS
Experience working with SIP trunks
Hands-on configuration of IVR call queues skill based routing overflow and fallback logic
Experience with call recording and working with CDR and CEL
Strong Linux skills Ubuntu or Debian and experience managing production servers
Knowledge of VoIP security including SIP brute force protection Fail2Ban firewalls ACL and rate limits
Experience integrating Asterisk with CRM billing antifraud systems and APIs
Experience working with AMI and ARI and integrating Asterisk with backend systems
Understanding of financial system requirements including stability auditing and logging
Ability to quickly understand complex and legacy systems

Responsibilities
Support and further development of the telephony platform for a fintech service
Ensuring stable operation of support collections and sales teams
Configuration and maintenance of IVR systems operator queues and business logic based call routing
Integration of Asterisk with internal systems including CRM backend and billing
Ensuring high availability fault tolerance and minimal downtime
Monitoring call quality and performance metrics including SLA ASR and ACD
Troubleshooting and resolving call quality latency and connectivity issues
Optimizing system load and scaling the VoIP infrastructure
Upgrading and modernizing the existing telephony environment
Documenting call flows routing logic and system integrations
Close collaboration with backend support and security teams

Project description

The project is for one of the world's famous science and technology companies in pharmaceutical industry, supporting initiatives in AWS, AI and data engineering, with plans to launch over 20 additional initiatives in the future. Modernizing the data infrastructure through the transition to Snowflake as a priority, as it will enhance capabilities for implementing advanced AI solutions and unlock numerous opportunities for innovation and growth.

We are seeking a highly skilled Snowflake Data Engineer to design, build, and optimize scalable data pipelines and cloud-based solutions across AWS, Azure, and GCP. The ideal candidate will have strong expertise in Snowflake, ETL Tools like DBT, Python, visualization tools like Tableau and modern CI/CD practices, with a deep understanding of data governance, security, and role-based access control (RBAC). Knowledge of data modeling methodologies (OLTP, OLAP, Data Vault 2.0), data quality frameworks, Stream lit application development and SAP integration and infrastructure-as-code with Terraform is essential. Experience working with different file formats such as JSON, Parquet, CSV, and XML is highly valued.

Responsibilities

Design and develop data pipelines using Snowflake and Snow pipe for real-time and batch ingestion.

Implement CI/CD pipelines in Azure DevOps for seamless deployment of data solutions.

Automate DBT jobs to streamline transformations and ensure reliable data workflows.

Apply data modeling techniques including OLTP, OLAP, and Data Vault 2.0 methodologies to design scalable architectures.

Document data models, processes, and workflows clearly for future reference and knowledge sharing.

Build data tests, unit tests, and mock data frameworks to validate and maintain reliability of data solutions.

Develop Streamlit applications integrated with Snowflake to deliver interactive dashboards and self-service analytics.

Integrate SAP data sources into Snowflake pipelines for enterprise reporting and analytics.

Leverage SQL expertise for complex queries, transformations, and performance optimization.

Integrate cloud services across AWS, Azure, and GCP to support multi-cloud data strategies.

Develop Python scripts for ETL/ELT processes, automation, and data quality checks.

Implement infrastructure-as-code solutions using Terraform for scalable and automated cloud deployments.

Manage RBAC and enforce data governance policies to ensure compliance and secure data access.

Collaborate with cross-functional teams including business analysts, and business stakeholders to deliver reliable data solutions.

Skills

Must have

Strong proficiency in Snowflake (Snowpipe, RBAC, performance tuning).

Hands-on experience with Python , SQL , Jinja , JavaScript for data engineering tasks.

CI/CD expertise using Azure DevOps (build, release, version control).

Experience automating DBT jobs for data transformations.

Experience building Streamlit applications with Snowflake integration.

Cloud services knowledge across AWS (S3, Lambda, Glue), Azure (Data Factory, Synapse), and GCP (BigQuery, Pub/Sub).

Nice to have

Cloud certifications is a plus

Languages

English: B2 Upper Intermediate

Join the Fintech Core team building a white-label modular platform that powers digital banks, payment systems, and fintech products across Europe, North America, and MENA regions
 

As a System Analyst on the Fintech Core project, you will define technical architecture, system specifications, and integration designs for a white-label modular fintech platform that enables rapid creation of digital banking and payment products.
 

The platform provides a complete technology stack including general ledger, middleware, mobile/web applications, and extensive third-party integrations for KYC, payments, card issuance, and compliance. You'll work closely with Business Analysts, Solution Architects, and Engineering teams to translate business requirements into detailed technical specifications, design robust system architectures, and ensure seamless integration across microservices while maintaining regulatory compliance and enterprise-grade security.

This role offers hands-on experience designing financial systems at scale, with exposure to payment processing, card networks, digital wallets, cross-border transactions, and regulatory compliance frameworks serving multiple fintech implementations globally.

Responsibilities
 

• Analyze and document system requirements for platform modules including payments, card issuance, digital wallets, accounts, ledger management, and compliance systems
• Translate business requirements into detailed technical specifications, API contracts, database schemas, and integration architectures
• Design data models, entity relationships, and data flow diagrams for transactional and financial systems with appropriate normalization and performance considerations
• Define integration patterns and technical specifications for connecting with payment processors, KYC/AML providers, card issuers, and open banking platforms
• Document system behaviors using sequence diagrams, component diagrams, deployment architectures, and API specifications (OpenAPI/Swagger)
• Collaborate with Solution Architects to ensure system designs align with microservices architecture patterns, scalability requirements, and technical best practices
• Define non-functional requirements including performance benchmarks, security controls, data retention policies, and audit trail specifications
• Facilitate technical design workshops with Engineering teams to review system specifications, validate implementation approaches, and identify technical risks
• Create comprehensive system documentation in Confluence covering technical flows, component interactions, message formats, and infrastructure requirements
• Support QA teams by defining system integration test scenarios, technical acceptance criteria, and end-to-end testing strategies
• Analyze system performance bottlenecks and propose optimization solutions for high-throughput financial transaction processing
• Ensure all technical specifications maintain regulatory compliance requirements (PCI DSS, GDPR, PSD2) and financial data security standards
• Maintain traceability between business requirements, system specifications, technical implementations, and test cases
• Participate in sprint planning, technical refinement sessions, and architecture review boards to ensure alignment between product vision and technical execution

Professional skills are required:
 

• 3+ years of experience as System Analyst, Technical Analyst, or similar role in fintech or banking domains

   

• Strong understanding of financial systems architecture including general ledgers, payment processing, and account management

   

• Experience with microservices architecture, API design, and distributed systems

   

• Proficiency in creating technical documentation: system design documents, data flow diagrams, sequence diagrams, ER diagrams

   

• Knowledge of database design and data modeling for transactional systems

   

• Understanding of integration patterns, message queues, and event-driven architectures

   

• Familiarity with payment systems standards (ISO 20022, SWIFT, SEPA, card schemes)

   

• Experience with API specifications (REST, OpenAPI/Swagger, webhooks)

   

• Understanding of cloud infrastructure and deployment architectures (AWS, Azure, GCP)

   

• Knowledge of authentication and authorization mechanisms (OAuth, JWT, API keys)

Technical Skills

• 3+ years of experience as System Analyst, Technical Analyst, or similar role in fintech or banking domains

• Strong understanding of financial systems architecture including general ledgers, payment processing, and account management

• Experience with microservices architecture, API design, and distributed systems
• Proficiency in creating technical documentation: system design documents, data flow diagrams, sequence diagrams, ER diagrams

• Knowledge of database design and data modeling for transactional systems

• Understanding of integration patterns, message queues, and event-driven architectures

• Familiarity with payment systems standards (ISO 20022, SWIFT, SEPA, card schemes)

• Experience with API specifications (REST, OpenAPI/Swagger, webhooks)

• Understanding of cloud infrastructure and deployment architectures (AWS, Azure, GCP)

• Knowledge of authentication and authorization mechanisms (OAuth, JWT, API keys)

   

Domain Knowledge

• Understanding of core banking concepts: accounts, transactions, balances, ledgers, reconciliation

   

• Knowledge of payment flows: domestic/international transfers, card payments, digital wallets

   

• Familiarity with KYC/AML processes and regulatory compliance requirements

   

• Understanding of financial data security standards (PCI DSS, GDPR)

   

• Experience with fintech product features: onboarding, card issuing, FX, acquiring

Analytical & Documentation Skills

• Excellent analytical thinking and problem-solving abilities

• Strong technical writing skills with attention to detail

• Ability to translate complex business requirements into technical specifications

• Experience with UML, BPMN, or similar modeling notations

• Proficiency with documentation tools (Confluence, Notion, or similar)

• Experience with requirements management and traceability

Skills will be a plus:
 

• Experience with white-label or multi-tenant system architectures

• Knowledge of blockchain and cryptocurrency integrations

• Familiarity with regulatory frameworks (PSD2, Open Banking, MiFID)

• Experience with performance testing and system optimization

• Understanding of DevOps practices and CI/CD pipelines

• Previous experience with modular platform architecture

• Knowledge of financial compliance and audit requirements

• Experience with data migration and system integration projects

Project description:

Fintech Core is a white-label modular fintech solution designed for rapid creation and launch of digital banking and payment products. It provides a comprehensive, turnkey platform that enables businesses to build neobanks, digital wallets, payment systems, and other fintech products within 3 months rather than years. The solution includes a complete technology stack: a robust general ledger platform, middleware layer, customizable frontend applications for iOS/Android/Web, and extensive third-party integrations for KYC, payments, card issuance, and compliance. Unlike traditional SaaS offerings, Fintech Core provides full access to source code, eliminating vendor lock-in and enabling deep customization.

The platform is built on microservices architecture with modular components that can be independently scaled and customized. It supports multi-currency operations, cross-border payments, card issuing, account management, transaction processing, compliance monitoring, and back-office orchestration. The solution is PCI & DSS compliant and designed to meet regulatory requirements across multiple jurisdictions.

Project stage: Active development and continuous enhancement. The platform is mature with multiple successful implementations but undergoes constant evolution to incorporate new regulatory requirements, payment integrations, and fintech capabilities. Quality, scalability, and compliance are paramount priorities.

The size and the structure of the PROJECT team:

Cross-functional team including Product Owners, Business Analysts, System Analysts, Frontend/Backend Developers, QA Engineers, DevOps, Security Specialists, and Compliance Consultants. The team operates in an Agile environment with close collaboration between technical and business functions.

Project description

Our client is a large international enterprise operating at scale in the industrial and manufacturing domain, developing and maintaining a modern cloud-based Core platform.
The project focuses on building a new Azure-based cloud solution that supports critical business processes across multiple regions.
The role involves working as part of a Scrum team on designing, developing, and maintaining high-quality, scalable, and maintainable software solutions in Azure, in close collaboration with developers, UX analysts, and other stakeholders.

Responsibilities

Work together with other Scrum team members on a new cloud solution for the client's Core platform

Participate in Scrum planning sessions by analyzing the work to be done

Implement new functionality or refactor existing code based on detailed specifications and mock-ups

Closely collaborate with other development team members and UX analysts

Create technical designs and define the required Azure architecture

Support technical decision-making, balancing cost, scalability, and maintainability

Write unit tests for newly developed functionality

Participate in performing code reviews

Report work progress on a daily basis

Focus on bug fixing when needed

Skills

Must have

Master's degree in Software Engineering or equivalent experience

At least 6 years of proven expertise in designing and developing high-quality software solutions, with a strong emphasis on maintainability and scalability

Solid knowledge of Azure Functions, Azure architecture, and containerization

Experience with Azure DevOps is considered a plus

Proficient in relevant languages and frameworks, including C#, .NET, SQL, HTML, and related technologies

Extensive experience in designing and implementing RESTful web services and APIs

Strong analytical mindset with the ability to collaborate and contribute to solution design

Capable of working independently while knowing when to escalate or discuss challenges and issues

Fluent in English, both spoken and written

Nice to have

Azure DevOps

Languages

English: C1 Advanced

Job Description

We are hiring a Senior LLM Systems / Agent Infrastructure Engineer to optimize and scale a production multi-agent LLM system that translates natural language into Cypher / SQL queries, executes guarded graph retrieval, and synthesizes structured RAG responses. You will engineer a faster, cheaper, and more reliable LLM system in production.

What We’re Building

A production multi-agent LLM system that:

• Converts Natural Language (NL) → Cypher (Neo4j) / SQL (PostgreSQL)
• Executes guarded graph queries
• Runs structured Retrieval-Augmented Generation (RAG)
• Orchestrates used tools

What You’ll Own

• Cut NL → Cypher / SQL latency
• Optimize model routing & tool orchestration
• Replace unnecessary LLM calls with deterministic logic
• Redesign context strategy
• Evaluate / replace current LLM stack (Google ADK)

Outcome: A faster, cheaper, and more stable pipeline.

Required

• 5+ years backend / ML systems experience
• 2+ years production LLM pipelines experience
• Strong Python (async, FastAPI)
• Experience with agent frameworks (LangGraph, DSPy, Semantic Kernel, etc.)
• Structured outputs / function calling
• RAG over structured data
• LLM + SQL or graph DB integration
• Strong grasp of token economics & latency optimization
• Inference optimization (vLLM, batching, streaming)

Location: remotely from  Latvia, Lithuania, lower priority - Spain/Portugal/Romania/Slovakia/Hungary/Czech Republic!!!
Start Date: 1 March

Duration: Until the end of September 2026 (option to extend)

Allocation: Full-time

Role Overview

We are looking for a mid-level Fullstack Developer to contribute across backend and frontend layers of the Sage Earth platform. This role requires a strong backend foundation with the ability to work on frontend features as needed.

Key Responsibilities

• Develop backend services using Java (JVM) and Kotlin
• Contribute to frontend development where required
• Collaborate closely with backend, frontend, and product teams
• Participate in design discussions and code reviews
• Ensure high-quality, maintainable solutions across the stack

Required Skills & Experience

• Experience with Java (JVM) and Kotlin
• Fullstack development experience (backend-focused)
• Understanding of frontend technologies and modern UI frameworks
• Experience working in agile teams
• Ability to balance backend and frontend priorities

Nice to Have

• React experience
• PostgreSQL exposure
• Cloud-native development experience

Location: remotely from  Latvia, Lithuania, lower priority - Spain/Portugal/Romania/Slovakia/Hungary/Czech Republic!!!
Start Date: 1 March

Duration: Until end of September 2026 (option to extend)

Allocation: Full-time

Role Overview

We are seeking a mid-level Backend Developer to work on the Sage Earth platform, contributing to backend services supporting data, AI, and ingestion capabilities.

Kotlin experience is preferred but not mandatory — strong Java developers willing to learn Kotlin are encouraged to apply.

Key Responsibilities

• Develop and maintain backend services using Java (JVM-based stack)
• Work with PostgreSQL databases and support data persistence needs
• Collaborate with Tech Lead, Principal Engineer, and other developers
• Write clean, maintainable, and well-tested code
• Participate in code reviews and technical discussions
• Support integration with data ingestion and AI components

Required Skills & Experience

• Solid experience with Java (JVM) backend development
• Experience working with PostgreSQL
• Understanding of RESTful APIs and backend service design
• Experience working in agile development teams
• Willingness and ability to learn Kotlin

Nice to Have

• Prior Kotlin exposure
• Experience with cloud platforms
• Familiarity with data-heavy or analytics-driven systems

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

- Build responsive UI experiences using React + Nexus components. - Ensure accessibility (WCAG) and UX compliance.
- Integrate front-end with backend APIs.
- Optimize UI for performance and cross-device compatibility.

- Implement reusable UI components and design patterns.

- Participate in UI code reviews and testing.

- Troubleshoot and resolve UI defects.

Skills

- Strong React, TypeScript, modern frontend tooling.
- Experience with design systems (Nexus preferred).
- Understanding of accessibility standards (WCAG).
- Knowledge of frontend performance optimization.
- Familiarity with API integration & authentication flows. - Experience with Jest/React Testing Library/Playwright. - Strong CSS and responsive design skills.

Please read before applying:

The client is building a product in the bank/investment/brokerage systems niche, and their investors have strict security and compliance requirements, where every person will go through a background check.

What does this mean?

Before making an offer, they will check whether you have violated any EU laws.

Why Poland?

The client has teams in the USA, Ireland, and Poland.

For background check — you must be a taxpayer in Poland for 2+ years.

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

- Develop and execute automated UI & API test suites.
- Lead regression testing strategy and quality governance.
- Validate UI/UX behavior and accessibility.
- Collaborate with engineering teams on defect resolution.
- Maintain test documentation and test metrics.
- Support UAT, release readiness, and quality gates.
- Test cloud-native deployments and integrations.
Skills
- Strong automation testing experience (Playwright/WebDriver). - Understanding of regression and integration testing design.
- Knowledge of accessibility and UI validation.
- Familiarity with API testing tools (Postman, REST Assured).
- CI/CD test execution knowledge.
- Basic debugging & log analysis skills.
- Experience creating reusable test assets.

Please read before applying:

The client is building a product in the bank/investment/brokerage systems niche, and their investors have strict security and compliance requirements, where every person will go through a background check.

What does this mean?

Before making an offer, they will check whether you have violated any EU laws.

Why Poland?

The client has teams in the USA, Ireland, and Poland.

For background check — you must be a taxpayer in Poland for 2+ years.

About Strim Duo:

Strim Duo is a creative and high-tech game and digital product studio headquartered in Limassol, Cyprus. The company provides a wide range of services, including social game development, product engineering, UX/UI design, custom software solutions, mobile applications, and post-launch product support.

Strim Duo helps partners create engaging and highly effective game content: from social and arcade games to MMORPGs and children’s apps, integrating advanced monetization mechanics and social network features (strim-duo.com)

The expertise we’re looking for

• High-level knowledge of Excel;
• English: B2 Upper Intermediate (for confident communication with bank representatives and partners);
• Strong attention to detail, result-oriented mindset, ability to multitask, analytical mind;
• Responsibility for time management at a very high-performance level;

• Experience in IT/ Gambling and working with international VAT are an advantage.

   

Your position will include

• Calculation of monthly revenue, preparation of invoices, reconciliation with counterparties;
• Managing bank transactions and monitoring cash flows to ensure accurate financial control;
• Formation of company’s income and expenses;
• Participation in the design and implementation of new reporting tools, models, and suggestion of additional solutions that can enhance and simplify the reporting and accounting processes;
• Other related tasks.