About the Role
We are looking for a Senior Software Engineer to design, build, and own significant components of the core query engine of a large-scale distributed data platform. You will lead work across query planning, optimization, and execution — driving architectural decisions, mentoring middle engineers, and pushing the platform's performance and scalability boundaries across all major clouds.
This is a systems-level, backend engineering role focused on distributed data processing internals — not application development or CRUD services.
Responsibilities
Architect, design, and implement significant components of the query engine — planner, optimizer, execution operators, memory management, and data access layers.
Write and review high-quality, performance-critical code in Java and/or C++.
Own end-to-end delivery of features from technical design through production rollout.
Drive performance optimization work — profiling, benchmarking, and eliminating bottlenecks in latency- and throughput-sensitive paths.
Integrate deeply with columnar formats, open table formats, and connectivity drivers.
Mentor middle engineers, lead code reviews, and set technical standards for the team.
Contribute to CI/CD architecture and quality processes across Jenkins, containerization, and multi-cloud deployment (GCP, AWS, Azure via Kubernetes / Docker).
Debug complex, cross-layer issues spanning query planning, distributed execution, memory management, and I/O.
Partner with US-based engineering leads on design reviews, architectural decisions, and roadmap execution.
Required Qualifications
Education: B.S. or M.S. in Computer Science, Computer Engineering, or a related technical field.
Programming: Strong proficiency in Java or C++, with deep understanding of OOP, systems design, memory management, and concurrency. Candidates strong in both are especially valued.
SQL & Data: Advanced SQL skills and strong understanding of query execution internals — planning, optimization, and operator implementation.
Data processing systems experience: Demonstrated experience building or extending data processing systems — query engines, distributed databases, ETL/ELT frameworks, or analytical platforms.
Engineering experience: 5+ years in backend/systems software engineering, with a track record of owning significant components.
CI/CD & DevOps: Solid experience with Jenkins and modern engineering workflows.
Containers & Orchestration: Strong working knowledge of Docker and Kubernetes.
Cloud: Hands-on experience with at least one major cloud (GCP, AWS, or Azure); exposure to more than one is a strong plus.
Version Control: Confident with Git / GitHub workflows and rigorous code review practices.
English: Upper-Intermediate or higher (B2+) — daily written and verbal communication with a US-based engineering team.
Availability: Able to work EU hours with a 2–3 hour shift toward US West Coast time to ensure daily overlap with the client team.
Leadership: Prior experience mentoring engineers, leading technical designs, or owning components end-to-end.
Desired Skills
Deep experience with Apache Arrow (columnar in-memory format).
Hands-on experience with Apache Calcite (SQL parsing, planning, optimization framework).
Experience with Gandiva or LLVM-based expression compilation and code generation.
Experience with open table formats — Apache Iceberg, Delta Lake, or Hudi.
Deep familiarity with distributed computing frameworks (e.g., Apache Spark, Kafka) and MPP SQL query engines (e.g., Presto, Trino, or similar).
Deep understanding of query planning, optimization (cost-based, rule-based), and execution internals.
Experience with data connectivity drivers: JDBC, ODBC, Arrow Flight.
Kubernetes on managed services (GKE / EKS / AKS) and multi-cloud exposure.
IaC tools such as Terraform.
Track record of performance optimization at the systems level — profiling, vectorization, cache/memory-conscious design.
Prior experience contributing to open-source data infrastructure projects.
About WiseAlt
wisealt.com
WiseAlt helps international online businesses access reliable payment infrastructure for high-risk and cross-border commerce. We work with merchants in industries such as e-commerce, digital services, SaaS, subscriptions, fintech, crypto-related businesses and other regulated or high-risk sectors.
Our role is to help merchants prepare for onboarding, coordinate payment providers, optimize payment flows and support international expansion.
We're looking for someone who enjoys organizing complex processes, communicating with clients and making sure opportunities never fall through the cracks.
What You'll Do
You'll become the operational owner of our sales pipeline and merchant onboarding process.
Your responsibilities will include:
- Qualify inbound leads and collect missing business information.
- Communicate with merchants via email, Telegram and WhatsApp.
- Maintain and update our CRM.
- Follow up with merchants and payment partners.
- Coordinate merchant onboarding documentation.
- Manage standard onboarding cases from qualification through provider submission.
- Escalate complex payment or compliance cases to senior team members.
- Reactivate inactive leads and previous conversations.
- Keep opportunities moving through the sales pipeline.
- Prepare summaries for management before meetings.
- Work closely with AI tools to automate repetitive work.
What We're Looking For
- Excellent written English.
- Strong organizational skills.
- Comfortable communicating with international B2B clients.
- Experience using CRM systems (HubSpot, Pipedrive, Notion, Airtable or similar).
- Ability to manage multiple conversations simultaneously.
- High attention to detail.
- Self-driven and comfortable working remotely.
Nice to Have
Experience in one or more of the following:
- Payments
- Fintech
- Merchant acquiring
- PSPs
- Banking
- SaaS
- High-risk industries
- KYC / KYB
- Sales Operations
- Customer Success
- Revenue Operations
Experience with AI tools such as ChatGPT, Gemini, Claude or Cursor is a strong advantage.
Success in This Role
Within your first months you will:
- Respond quickly to every new lead.
- Ensure every opportunity has a clear next step.
- Keep CRM accurate and up to date.
- Successfully onboard standard merchant cases.
- Help reactivate dormant leads.
- Improve overall sales pipeline visibility.
Why Join WiseAlt?
- Work directly with founders.
- Learn international payments and fintech.
- Build AI-driven sales operations from the ground up.
- High ownership with minimal bureaucracy.
- Flexible remote work.
- Opportunity to grow into Sales Operations, Merchant Success or Business Development.
Our client is a fintech/blockchain startup focused on tokenizing private market assets—including real estate, private equity, and infrastructure—and providing on-chain valuation data.
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ELEKS Software Engineering and Development Office is looking for an experienced Middle Java Developer in Ukraine (Lviv, Ivano-Frankivsk, Ternopil) or Poland.
Our client is a large financial services company, based in the USA. This company helps financial institutions worldwide grow assets efficiently with its innovative portfolio management suite of data management, investment accounting and performance measurement solutions.
ELEKS Quality Assurance Office is looking for a Middle Automation Test Engineer (Java) in our offices in Ukraine (Lviv, Ivano-Frankivsk, Ternopil, Kyiv).
The company is spread across the world, main location – USA. It is committed to helping financial institutions worldwide grow assets efficiently with its innovative portfolio management suite of data management, investment accounting, and performance measurement solutions delivered over its secure private cloud. The customer deploys trusted solutions and services that create operational efficiencies and help reduce complexity and risk. In addition to the cloud solutions, customer Management Services offering helps deliver enriched and ready-for-use investment data. Customer-integrated technology, products, and services help our clients to grow their assets efficiently and effectively.
We are looking for a passionate Backend Engineer (Go) to join our client’s Store of Value team. In this role, you will collaborate with a client-focused squad to design and deliver impactful solutions for millions of users worldwide. You will work closely with cross-functional peers and report directly to the Engineering Manager within the SoV organization.
Our partner is an innovative, prosperous FinTech project based in the US since 2011. The company provides digital financial services for migrant workers, allowing them to send money home through modern digital channels, including mobile phones. They developed an international payment platform that uses the latest technologies to simplify the money transfer process, save time and eliminate the need for additional forms, codes, and intermediaries. The company’s mission is to enhance the lives of migrants who send money around the world and manage their finances.
An Israeli IT company developing blockchain software is hiring a Vue.js Developer to join its remote team. We work with modern tech at the intersection of fintech, crypto, and scalable systems.
Tech stack: Vue.js, Nuxt.js, Node.js, PHP, Python, Kafka, MySQL, MongoDB, Docker, Kubernetes, Web3
Requirements:
2+ years with Vue.js
Experience with Nuxt.js
Async coding & event loop understanding
REST API, WS/WSS
Git, Gitflow
Debugging & working with existing code
Attention to detail
English — B2+
Nice to have:
Microservice architecture
TypeScript
Docker, CI/CD
React or Angular
Web3 experience
We offer:
Remote work
Flexible schedule
Direct access to C-levels
Gifts on special occasions
♀️ Friendly, open-minded team
Intetics is looking for an experienced Fullstack Java Developer to join a project for a leading financial services company. You'll be working on building a robust, modern user portal using Vaadin Flow for the frontend and Java for the backend. If you’re passionate about full-cycle development and thrive in dynamic environments, this role is for you.
Our client is a leading provider in the electronic payments industry, offering secure transaction solutions for businesses. This role involves working closely with experienced Business Analysts on projects, providing a unique opportunity to enhance your skills, grow professionally, and contribute to innovative solutions in a fast-evolving industry.
Svitla Systems Inc. is looking for a Full Stack Engineer (Python + React) for a full-time position (40 hours per week) in Ukraine. Our client is a broker platform that provides brokers with real-time risk capacity, available anytime, anywhere. It represents a genuine step change from the current manual and time-consuming process available on the market, providing an unprecedented level of service to brokers and clients. It is a first-of-its-kind digital model that claims to deliver a unique advantage to its business partners. It is the first fully digital and automatically driven Lloyd’s of London syndicate. They are transforming the Lloyd's market by revolutionizing the broker and client experience, adopting an algorithmic approach to underwriting, and developing a learner-operated model to benefit all market participants in the long term. The company developed and created a platform in 2021, in collaboration with partners at Google and UCL, that enables insurance brokers to place risks quickly and frictionlessly.
Andersen is hiring a Junior QA Automation Engineer (JavaScript) for a UK FinTech project. The role involves testing web-based solutions that support financial operations through data and analytics tools.
The customer is a technology-focused FinTech company with a strong foundation in market expertise, quantitative research, and modern cloud technologies. The company builds data-centric solutions for the financial industry, specializing in advanced analytics and software engineering to create innovative tools that support informed decision-making in trading and investment.
The project is focused on developing advanced FinTech solutions, including an analytics platform with real-time data visualization and trading strategy tools, as well as a web application for brokerage trading. Both aim to enhance decision-making and streamline trading through intuitive, data-driven interfaces.
Our client is a newly formed FinTech partnership working to deliver next-gen, Cloud-First, trading solutions to global, multi-asset class institutional clients. The applications that we are building are highly modular, well-tested, well-documented, and internally discoverable, all of which are, we believe, the not-so-secret sauce that will enable us to scale the product and the business.
Our overarching commercial goal is to shake up an industry that is overdue for tech-driven disruption as we expand our capabilities and reach, pushing established industry practices forward in every respect. We are tackling these challenges because we believe that our clients deserve better.
On behalf of our Client from Japan, Mobilunity is looking for a Data Engineer for a long-term engagement.
Our client is a fast-growing fintech company based in Tokyo. The company offers its real-time monthly consolidated credit service all across Japan. Our client started Japan’s first instant post-pay credit service for e-commerce customers in October 2014. The main product is an online payment platform which requires no pre-registration or credit card to use; via this service the customers can purchase products online using only a mobile phone number and email address and settle a single monthly bill for all their purchases, either at a convenience store, by bank transfer or auto debit. Customers can use credit funds during a month and then return the balance to zero without paying credit interests.
This service also supports multi-pay installments and subscriptions. There are currently over 4 million accounts in use. This service got the largest investment to date in the Japanese financial tech industry, including PayPal Ventures investment.
We are looking for a Data Engineer, reporting to the Head of Data Platform Engineering, who will work closely with product engineers and business stakeholders to turn data into information. From which insights can be provided back to product and business leaders to inform our product design and features. Your responsibilities will include conducting full lifecycle analysis to include requirements, task and design(s). You will develop both analysis on source data systems as well as support reporting activities and capabilities. Our ambition is to be a Data Driven firm and you will assist in this endeavor in part by monitoring performance of source domain data systems, cleansing and identifying improvements.
A regulated Payments Institution specializing in Acquiring, Issuing and Mobile Payments with a license granted by the Central Bank of Cyprus. We provide online merchants with reliable and effective acquiring solutions.
Our vision is to empower business growth through innovation in payments.
Our mission is to be the people that take care of the payments and the platform that powers the growth.
Important! This role starts as a 2-month assignment, with the possibility to continue depending on project needs.
Join us as a Mobile QA Engineer and play a vital role in delivering high-quality fintech mobile applications! At Kindgeek, you’ll work on innovative solutions for a regulated Payments Institution, ensuring seamless performance on both iOS and Android platforms. With our supportive environment, professional growth opportunities, and a collaborative team, you'll have everything you need to thrive and make a meaningful impact.
We're looking for a Mobile QA Engineer who has
As a Mobile QA Engineer, you will:
We’re the Wix Payments team.
We provide Wix users with the best way to collect payments from their customers and manage their Wix income online, in person, and on-the-go. We’re passionate about crafting the best experience for our users, and empowering any business on Wix to realize its full financial potential. We have developed our own custom payment processing solution that blends many integrations into one clean and intuitive user interface. We also build innovative products that help our users manage their cash and grow their business. The Payments AI team is instrumental in promoting AI based capabilities within the payments domain and is responsible for ensuring the company is always at the forefront of the AI revolution.
As a Data Engineer on the Wix Payments AI Team, you’ll play a crucial role in leveraging data to uncover insights, refine user experiences, and drive strategy within the payments domain. You’ll develop & maintain infrastructure for both generative AI and classical data science applications and while pushing the limits of what can be built with emerging AI technologies, often requiring research into new technology stacks and identifying optimal combinations to create solutions.
Candidate will be responsible for the development, maintenance, and support of entertainment and media applications on the Android and iOS mobile platforms.
This is an opportunity to join a worldwide community of developers that create and deliver fast and innovative media and networked applications for mobile platforms
Проект – білінг-платформа для онлайн-платежів користувачів у власних ігрових проектах. Ми використовуємо сервісну архітектуру для здійснення платежів. Scala команда займається сервісами ризик менеджменту (антифроду), маршрутизації платежів, збору даних, фінансовим додатком.
Так як наші клієнти по всьому світу, ми будуємо географічно розподілені додатки, використовуючи як GCE і AWS.
Стек: Scala 2.13 (in some places 3), Izumi distage (DI), Cats, Cats-Effect, Scalikejdbc, Monocle, Http4s, GRPC, Protobuf, RabbitMQ, Redis, Prometheus, Grafana.
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