Senior Golang Software Engineer (Data & Infrastructure)

Invia x Travelplanet.pl x Wakacje.pl is one of the largest travel groups in Europe. Every year we help more than 6 million people plan their trips. Behind that sit teams in IT, Product, Data, Marketing, HR, Finance, Sales and Customer Experience, who build the tools and services those travelers use. Whichever team you join, your work shows up in how people plan and experience their holidays. Your next stop: Join the team behind Supply Nexus, our group-level booking engine and supply platform. This role leans more toward data, infrastructure, and architecture than pure coding — roughly half your time is hands-on coding and code review, the other half is research and analysis on data structures and how best to process them in code. What lies ahead on your journey: Split time ~50/50 between coding/code review and research on data structures and processing approaches Maintain and enhance Supply Nexus, including the booking engine Integrate data and systems from across the business into one unified platform Lead the redesign of a legacy service onto a modern platform — from architecture through delivery Import and maintain tour operator data feeds, with a strong focus on availability Process very large files (hundreds of GB) and structure the data into databases at terabyte scale Design indexes for the fastest possible data access Handle basic DevOps: CI/CD, deployment, cloud resource optimization Improve platform performance, scalability, reliability, and observability Build and improve API integrations across all entities What to pack in your suitcase: 6+ years as a software engineer, including 3/4+ years with Go Proven experience processing large volumes of data at scale Hands-on experience with relational and non-relational databases handling large data volumes Experience processing very large files and structuring data into terabyte-scale databases Experience designing indexes for fast data access Strong, practical SQL Experience with distributed systems and multiple architecture types Solid data structures knowledge REST API and gRPC experience English B2+ Strong collaboration and problem-solving skills CI/CD fundamentals and full software delivery lifecycle experience Comfortable navigating legacy codebases Your extra baggage of experience: Kubernetes Redis (or similar) Kibana, Grafana What you will find on board: A remote working model, with a commitment to work from the office at least once a quarter Opportunities for professional development aligned with current business needs and your individual career goals, A benefits cafeteria platform – we do not decide what siuts for you, you can choose from life insurance, a sports card, and lunch and shopping vouchers, Cooperation in international environment, Access to Audioteka and Pilot WP, helping you balance personal development with moments of relaxation, An openness to innovation and AI-powered tools that support our daily work and help us achieve even better results, Discounts on our products for you, your family, and friends, Comfortable offices in convenient locations (Gdańsk – Alchemia, Warsaw – Business Garden, Wrocław – Legnicka Business Garden), along with a friendly and informal atmosphere that encourages collaboration, Option to join International educational trips, so you can see the destinations and hotels from our portfolio for yourself, A culture built on trust, open communication, feedback, and appreciation (because the best journeys begin with a great team), Team where #Explore #Engage #Enjoy build our travel mindset. Get to know us better and see what our everyday journey looks like: Instagram, LinkedIn, Tiktok, Facebook. Aplikuj