Jobs Backend
682
Middle+\Senior Ruby on Rails Developer
CrunchCode
to $4500
Full Remote
Β·
Ukraine
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5 years of experience
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English - B2
Required:
Middle+\Senior Ruby on Rails Developer, English B1+
Full-time, 8-12 months
Project Overview
A data-driven social media analytics platform undergoing global expansion. The project utilizes an event-driven architecture to process large-scale data from social networks, focusing on high-performance backend systems and seamless React integration.
Responsibilities
- Design and maintain robust, reusable Ruby code for event-driven systems.
- Integrate React-based frontend elements with server-side...
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105 views
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33 applications
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16d
Software Engineer β Ruby
ShipHawk
$$$$
Full Remote
Β·
Countries of Europe or Ukraine
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6 years of experience
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English - B1
Responsibilities:
Develop new product features
Fix bugs as they arise
Ensure Merge Requests improve test coverage by adding new unit tests
Document explanation of developed features/fixes to Merge Requests and to corresponding tickets
Documenting completed tickets for internal and external users
Contribute high-quality code to the backend and frontend projects
Requirements:
6+ years developing software in a commercial environment
4+ years of Ruby Development
Experience with Ruby frameworks and...
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205 views
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47 applications
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17d
C# Team Lead with DevOps and architectural skills
Uasoftdev
$$$$
Full Remote
Β·
Countries of Europe or Ukraine
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5 years of experience
Β·
English - B2
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Dating
About: the first dating application that differentiates itself through mandatory ID verification (Vouched) and background checks (CheckrIDI Data) for every member. The platform is designed to create a trusted environment where users can connect with confidence. Startup in a growth phase, entering the v2.0 βIgniteβ release cycle
The entire stack runs on Microsoft Azure with code managed in GitHub and CI/CD orchestrated through Azure Pipelines.
Role Summary
The Engineering Lead will serve as the top...
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181 views
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24 applications
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17d
Node.js Backend Developer
Greenwich IT Solutions
$$$$
Full Remote
Β·
Countries of Europe or Ukraine
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3 years of experience
Β·
English - A2
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Advertising / Marketing
Backend Developer (Node.js) for the international product IT company, which provides a full-stack package of complex AdTech solutions for digital advertisers, publishers and ad agencies worldwide.
The company develops white-label platforms for enterprise clientsβcustom turnkey solutions to automate and optimize digital advertising.
Products company : SSP, DSP, Ad Exchange platforms.
Main markets - Tier 1-2
The technical team - up to 30 people (CTO, Team Lead, Back-end -10, Front-end developers, QA,...
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251 views
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63 applications
Β·
17d
Java Software Engineer with .NET (Poland)
Luxoft
$$$
Poland
Β·
5 years of experience
Β·
English - B2
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Fintech
Project Description:
Our client is a large international enterprise developing and evolving a core solution that supports critical business processes used across multiple teams.
The project focuses on the continuous development and maintenance of a central platform, with an emphasis on code quality, scalability, and long-term maintainability. The solution is built using modern software engineering practices and technologies.
The role involves working as part of a cross-functional Scrum team,...
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47 views
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1 application
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17d
Senior Java Developer (Microservices) Krakow
Luxoft
$$$
Hybrid Remote
Β·
Poland
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7 years of experience
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English - B2
Β·
Fintech
Project Description:
You will join a long-term, enterprise-scale project for a global client in the investment banking domain. The project focuses on building and evolving a set of mission-critical backend services that support complex business workflows, regulatory processes, and system integrations across the bankβs ecosystem.
The platform is based on a distributed microservices architecture, leveraging Spring Boot, event-driven communication, and BPM-driven process orchestration. The system operates...
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41 views
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2 applications
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17d
Python Engineer (Flask or FastAPI)
Uvik Software
$$$$
Full Remote
Β·
United States
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3 years of experience
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English - C1
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Fintech
At Uvik Software, we specialize in assembling top-tier dedicated development teams and delivering exceptional software solutions to clients across the globe. We are passionate about clean code, great collaboration, and cutting-edge technologyββ.
Weβre on the lookout for a Python Engineer who is eager to grow, build scalable backend systems, and contribute to exciting projects in a fast-paced, agile environment. If you're a motivated developer with a sharp eye for detail and a passion for...
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118 views
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0 applications
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17d
Trainee Java Developer
EveryMatrix
$
Office Work
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Ukraine
(Lviv)
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0.5 years of experience
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English - B1
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Gambling
PLEASE NOTE that we are searching for candidates who are located in Lviv and are able to visit office in Lviv.
About us:
EveryMatrix is a leading B2B SaaS provider delivering iGaming software, content and services. We provide casino, sports betting, platform and payments, and affiliate management to 200 customers worldwide.
But that's not all! We're not just about numbers, we're about people. With a team of over 1000 passionate individuals spread across twelve countries in Europe, Asia, and the US, we're...
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187 views
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27 applications
Β·
17d
.NET Engineer
BETER
$$$$
Hybrid Remote
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EU
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3 years of experience
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English - B1
BETER is a rapidly growing product company. We create competitive content supplemented with analytics. For more than 5 years, we have been organizing sports tournaments, broadcasts, and developing our own sports community. We hold 45+ thousand events per month in esports and classic sports. BETER products are known all over the world β our content is represented in 150+ countries.
Our current partners are the worldβs most famous trading giants.
We are currently looking for a .Net /C#...
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224 views
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85 applications
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17d
Python Team/Technical Lead
Luxoft
$$$$
Full Remote
Β·
Ukraine
Β·
8 years of experience
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English - B2
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Fintech
Project Description:
By applying for this position, you may join one of the most respected and rapidly growing institutional investors globally. Our client is a professional investment management organization that manages funds to ensure long-term sustainability. The company invests across all major asset classes, including public equity, private equity, real estate, infrastructure, and fixed-income instruments, with offices in Toronto, London, Hong Kong, New York, SΓ£o Paulo, Luxembourg, and Mumbai.
The...
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30 views
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1 application
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17d
C# developer with Java or React for an American Investment Company
SFox GmbH
$$$$
Full Remote
Β·
Poland
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4 years of experience
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English - B2
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Fintech
We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.
Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.
4-6 years of experience is ok
Responsibilities
β Modernize legacy systems( C#) via redesign...
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87 views
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3 applications
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17d
Senior Java Developer (desktop experience must)
Luxoft
$$$
Full Remote
Β·
Ukraine
Β·
6 years of experience
Β·
English - B2
Project Description:
One of the world's largest providers of products and services to the energy industry has a need to develop and support enterprise information system in Oil & Gas domain.
Product being developed is a cloud solution for interpretation of geological and geophysical data. Project is based on SCRUM methodology.
Our project is stable, long-term and constantly adopts new technologies such as newest Java and Eclipse RCP versions, cloud and GPU computing, microservices architecture and other...
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36 views
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4 applications
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17d
Full-Stack Developer (Ruby on Rails + Next.js)
New Wave Devs
$$
Full Remote
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Worldwide
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2 years of experience
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English - B2
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Education
Looking for a full-stack developer for a long-term project with an EdTech platform that has been operating for 15 years and has thousands of active users.
The team is small: a tech lead, a frontend/payments developer, and a QA engineer. You will own tickets end to end - from reading to deploy - without hand-holding.
Stack: Ruby on Rails, Next.js, React, PostgreSQL, Nginx, Docker, Tailwind CSS, Render.
Requirements:
2-5 years of experience with Ruby on Rails and React/Next.js
Experience deploying to...
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85 views
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19 applications
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17d
Regular Full Stack Developer
Luxoft
$$$
Full Remote
Β·
Ukraine
Β·
3 years of experience
Β·
English - B2
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Fintech
Project Description:
Join a Team Redefining Modern Banking Technology!
Our client is a Swiss bank focused on delivering advanced online trading and financial services. Unlike traditional financial institutions heavily dependent on legacy systems, this bank invests in a lean, modern, and continuously evolving technology stack.
What the Project Is About
The team is responsible for all postβmarket Forex operations, ensuring that trading activities are accurate, consistent, and properly reconciled after the...
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98 views
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12 applications
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17d
Senior Python Developer
DOIT Software
Responds Quickly
$$$$
Full Remote
Β·
Countries of Europe or Ukraine
Β·
5 years of experience
Β·
English - B2
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Energy / Utilities
We are looking for a skilled Python Developer to join one of our projects on a full-time basis.
About the project: The client is from Norway. They are working on developing a product for the maritime industry. The product focuses on energy analysis for different sea transport (for example, fuel usage, greenhouse gas emissions, etc.).
Responsibilities:
Design and develop new features in line with the product roadmap and detailed requirements.
Write clean, efficient, and maintainable code, following best...
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117 views
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32 applications
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17d