Senior Fullstack Engineer (ReactJS, NodeJS)

SwingDev—a hippo company; Poland; On-site; PLN 290,000 - 357,000; Full time

Benefits offered by this job

Remote work

Private medical care

Group life insurance

Multisport card

Language lessons

Team events

Free snacks and beverages

Job summary

SwingDev—a hippo company in Poland is seeking a Senior Fullstack Engineer (frontend leaning) to build and own features across React frontend and Node.js backend. You’ll work in a cross-functional team with Product, Design, QA, and other engineers, with real influence over what we build and how we build it.

You should have at least five years of hands-on web development, strong API and system design skills, and comfort working across time zones with US teams.

Qualifications

• At least 5 years of hands-on web development experience.
• Strong React and Node.js fullstack capabilities.
• Experience with API design, microservices, and system design patterns.
• Proficient in relational databases (PostgreSQL, MySQL, or SQL Server).
• Ability to work across time zones and collaborate with US teams.
• Willingness to mentor engineers and lead discussions.

Responsibilities

• Design and build user-facing features with React and Node.js.
• Own end-to-end feature development from problem to production.
• Collaborate with Product and Design to shape scope before coding.
• Maintain reliable databases and APIs for real-time decisions.
• Deploy software using Kubernetes and serverless tech.
• Investigate production issues and implement fixes.
• Emphasize security in all work.
• Write robust automated tests.
• Mentor mid-level engineers and review code.
• Contribute to architectural decisions and long-term direction.

Skills

React

Node.js

TypeScript

JavaScript

API design

Microservices

System design

English proficiency

Independent problem-solving

Team mentorship

Tools

PostgreSQL

Docker

Kubernetes

AWS

Fargate

Grafana

Prometheus

Coralogix

BigQuery

Job description

• Real AI use case production experience,

SwingDev—a hippo company is the Polish branch of a fast-growing InsurTech product company - Hippo Insurance. We’re here to make home insurance smarter and more proactive, using tech to bring fresh solutions. We also create digital products that support our customers, always focusing on what really makes an impact.

Putting a lot of effort into hiring top-tier professionals is a proof that we care a lot about tech experience, the attitude, human approach, and what we could call „culture fit”.

„SwingDev is all about people” - yes, it may sound a bit cliche. But whether we're writing code or just hanging out, we know that people are at the heart of everything we do. We like to have a good time and keep things light, even when we're tackling big projects. We could brag about what’s making us special, but we’ve boiled it down to two key ingredients: mature, companionable people who, rather than compete, prefer to inspire and have each other’s backs; a culture of trust, empathy, and positivity that keeps us together, lets us interact as teammates and friends, and truly enjoy the ride.

So if you're a Senior Fullstack Engineer (frontend leaning) looking to shake things up and have a good time while you’re at it, you’ve come to the right place.

About the role

At Hippo Insurance, we’ve got almost 20 tech charters up and running — and we’re still growing fast. That’s why hiring for back-end roles is a never-ending story here, and we usually have several recruitments going on at the same time. Joining us means becoming part of a product company in the insurance technology space — building and owning long-term solutions.

You’ll join one of our product charters as a Sr. Fullstack Engineer (FE leaning) who owns features end to end - from an ambiguous problem statement, through design and implementation across the stack, to production and the metrics that follow. You’ll work in a cross-functional team alongside Product, Design, QA, and other engineers, with real influence over what we build and how we build it.

If you’ve ever been curious about how insurance actually works under the hood, this is a great place to find out!

What will you do

• You’ll design and build user-facing features end to end - React frontends, the Node.js services and BFF layers behind them, and their interactions with data stores and third‑party APIs
• You’ll own technical direction in your domain: you’ll break down large, fuzzy problems into shippable increments and make the architecture calls that come with them
• You’ll partner with Product Managers and Designers early, challenging requirements and shaping scope before a line of code is written
• You’ll support reliable databases and APIs for real-time automated decision‑making
• You’ll deploy your software using industry-standard tooling like Kubernetes clusters, and Lambda functions.
• You’ll investigate and resolve production issues by analyzing code, data, and system behavior, then propose and implement timely fixes to minimize user impact
• You’ll care deeply about security in everything you do and constantly raise the baseline of how we defend our users’ data against external threats and themselves
• You’ll implement robust automated test suites across the test pyramid to ensure high quality and a low failure rate of delivered code
• You’ll mentor mid‑level engineers, give high‑quality code review feedback, and act as a go‑to person for engineers who lean more heavily to one side of the stack
• You’ll have huge creative freedom and the ability to put your mark on the project - and you’ll take ownership and responsibility for what you do
• You’ll have a lot of chances to develop your skills as well as learn a lot about how tech business is done in the US

We might be a match if you

• Have at least 5 years of hands‑on commercial experience building web applications, with real depth on both sides of the stack - React, Node.js, JavaScript, and TypeScript
• Have designed and shipped production services, not just consumed them - you're comfortable with API design, microservices, and system design patterns
• Possess a good, practical knowledge of at least one relational database system, e.g. PostgreSQL/MySQL/SQL Server
• Have experience implementing the test pyramid (unit, integration, e2e tests)
• Are an independent problem‑solver who's comfortable with ambiguity and knows when to ask instead of guess
• Can lead discussions and decisions regarding software design and architecture, and explain the trade‑offs to technical and non‑technical audiences alike
• Can demonstrate responsibility, accountability, and a strong sense of ownership in delivering high‑quality work
• Utilize good security practices effectively
• Enjoy making other engineers better - through code review, pairing, and mentoring
• Show readiness to learn and expand your skill set as required by ongoing projects
• Have a sense of humor - seriously, it matters here
• Have a good command of English (written & spoken)
• Are available to work in different timezones - we prioritize everyone’s personal time and work‑life fit, but since we work across Poland and the US (Austin, San Francisco), occasional evening meetings may be necessary (on average 2 days per week).

What you’ll be using after joining us

• TypeScript, Node.js, Nest.js
• PostgreSQL and other data stores
• Docker and container‑based deployment technologies (e.g. Kubernetes/Fargate)
• Grafana, Prometheus, Coralogix for monitoring
• AWS for infrastructure
• Automated software testing on module/integration/system levels
• AI tools (Devin, Devin Desktop, Claude)

You will get extra points for

• Experience with data analysis and BigQuery
• Real AI use case production experience
• Experience mentoring engineers or leading a small team

What benefits are waiting for you

• Salary: 26 000 - 32 000 PLN + VAT on B2B
• Basics: Form of employment of your choosing
• Remote work & flexible working hours
• Non‑service days
• Health & Safety
• Private medical care with dentists & orthodontists package for you and your family
• Group life insurance
• Psychotherapists support — free online sessions with psychologists and psychotherapists
• Home physiotherapy
• Multisport card & meditation apps reimbursed 50%
• Working conditions & Development
• Gear with Apple Logo and monitor
• 50% reimbursement for courses, conferences, books & certificates
• Free access to private language lessons
• Personal Development & 4 Voluntary Non-service days
• Extras you may like
• Cafeteria platform — extra "stówka" every month to spend on whatever you want to
• Nanny services for parents
• Concierge services - a personal assistant to help you to deal with your everyday matters
• Chill room with table football & PlayStation 5
• Free snacks, and ice cream in the office (every day, all year round!)
• Free Friday Lunch in the office
• Team building events — we party together several times a year during the annual Offsite & Christmas Parties, beer after work, or our #WinterEscapeMonth workation in Cyprus.