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Principal Fullstack Engineer (React+Java)

Intellias
Department:Fullstack React
Type:REMOTE
Region:EU
Location:Poland
Experience:Mid-Senior level
Estimated Salary:PLN80,000 - PLN120,000
Skills:
REACTJAVATYPESCRIPTJAVASCRIPTAWSGRAPHQLPOSTGRESOPENSEARCHDATADOGCYPRESS
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Job Description

Posted on: August 7, 2025

Intro:

We’re launching a new partnership with a valued client in fintech, and we’re growing our team to support this exciting collaboration

Client is a financial sciences company, combining data analysis, invention, and rigorous inquiry to help solve the toughest challenges in investment management, insurance technology, securities, private equity, and venture capital.

Project overview:

  • The platform is a portfolio analytics tool used by asset owners, asset managers, and advisors.
  • The platform applies the best expertise in research, data science, and technology to modernize the analytics experience for institutional investors, helping them embrace a quantitative approach to multi-asset portfolio risk and investment decision making.
  • The available tools help investors perform factor-based risk analysis to inform manager due diligence, investment evaluation, and portfolio construction.
  • The client's headquarters is in the USA
  • We are seeking an experienced, full-stack Software Engineer to help own the innovation, technical design, and development of the platform.

You will be joining a newly formed team with the following structure:

  • 1x Delivery Manager
  • 1x Principal Engineer
  • 2x Senior Engineers
  • 1x Middle Engineer
  • 1x Automation Test Engineer

Technology Stack:

  • Cloud based, modern web application stack using Java, Typescript, React.js
  • Apollo GraphQL as an popular open-source ecosystem for building and managing GraphQL APIs
  • Service oriented architecture, infrastructure-as-code
  • Continuous development and deployment
  • Auto-scaling and robust search (Postgres, OpenSearch)
  • Cloud technologies (AWS)
  • Cloud monitoring (Datadog)
  • Test automation (Cypress)

Requirements:

  • 7-10+ years of experience preferred building and delivering customer facing products
  • Bachelor’s degree in Computer Science or related technical discipline
  • Experience with modern front-end technologies: React.js, TypeScript, JavaScript
  • Experience with Java BE development (1+ year)
  • Experience with relational and NoSQL databases, test automation, DevOps and cloud technologies (AWS preferred)
  • Prior experience with systems design, building enterprise SaaS solutions, experience with user research, and product analytics are a major plus
  • Strong communication skills, keen attention to detail, readiness to challenge assumptions and obsession with building quality software

Responsibilities:

  • Create, design, build and deploy SaaS product end to end with an agile approach, from conceptualization, through rigorous testing, and partnering with clientÂŽs multi-functional teams to ensure an outstanding in-product UX
  • Conduct front-end web development using React, TypeScript, CSS, and other technologies
  • Perform API design and development in Java, using cloud, microservices, and caching
  • Become a domain expert and trusted advisor
  • Contribute to the continuous learning approach of the team by bringing in new insights, welcoming them from others, and generating even stronger outcomes as a result
  • Provide hands-on coding support and perform code reviews to ensure quality standards
  • Lead the design and architecture where it is required
  • Make decisions on technology stacks, tools, and best practices where it is required
  • Facilitate knowledge sharing and maintain a collaborative team culture
  • Resolve technical conflicts and remove blockers that slowing\stop team progress
  • Collaborate with product managers, designers, and other stakeholders to define and refine requirements
  • Own and manage technical risks and communicate them to leadership
  • Represent the technical team in planning sessions, stakeholder meetings, and cross-functional discussions
  • Translate business requirements into technical tasks and roadmaps
  • Communicate clearly about progress, challenges, and technical decisions
Originally posted on LinkedIn

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