{"id":68234,"url":"https://alion.io/job/sii-fx-senior-java-developer-fmx-2","title":"FX Senior Java Developer (f/m/x)","company":{"id":1387,"name":"Sii","domain":"sii.pl","url":"https://alion.io/company/sii","size_band":"5000+","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kraków, Poland"],"countries":["PL"],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":{"min":24000,"max":30000,"currency":"PLN","period":"month","gross":null,"usd_annual":96240},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"CI/CD","optional":false},{"name":"GCP","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"ClickHouse","optional":true},{"name":"Go","optional":true},{"name":"Rust","optional":true}],"status":"live","first_seen_at":"2026-08-21T08:00:26Z","employer_posted_date":null,"last_verified_at":"2026-08-21T08:00:26Z","board_verified":false,"closed_at":null,"days_open":41,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":41},"description":"We are looking for an experiencedSenior Java Developer to join a team responsible for building and developing modern backend systems in a distributed environment. The projects involve high-performance and scalable solutions used in the financial sector, with a focus on processing large volumes of data and microservices architecture.\nYour tasks\nDesigning and developing backend systems based on Java\n\nCreating and evolving a microservices architecture\n\nBuilding and maintaining REST APIs and system integrations\n\nDesigning solutions that meet high availability and performance requirements\n\nWorking with systems that process large volumes of data\n\nCollaborating with the team using Agile methodologies\n\nParticipating in architecture design and technical decision-making\n\nImplementing and optimizing CI/CD processes and ensuring system security\n\nRequirements\nMinimum 10 years in software development\n\nVery good knowledge of Java (backend) and Spring\n\nStrong understanding of REST APIs, HTTPS, microservices, and message queues (MQ)\n\nAbility to design high-availability, scalable, and high-performance systems\n\nVery good knowledge of relational databases (SQL)\n\nFamiliarity with CI/CD pipelines and Agile ways of working\n\nKnowledge of distributed systems and data processing\n\nHands-on work with Kubernetes and cloud platforms (GCP preferred)\n\nFluent Polish and English required\n\nResiding in Poland required\n\nNice-to-have requirements\nKnowledge of Go, Rust, or similar system-level languages\n\nExperience with NoSQL and analytical databases, e.g., ClickHouse\n\nFrontend development experience\n\nFamiliarity with the banking sector (trade lifecycle, FX, post-trade processing)\n\nBanking experience / FX experience (forex)\n\nWorking from the office in Krakow 6 times per month\n\nWhat we offer\nGreat Place to Work since 2015 - it's thanks to feedback from our workers that we get this special title and constantly implement new ideas\n\nEmployment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market\n\nWe share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022\n\nAttractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more\n\nComfortable workplace - class A offices or remote work\n\nDozens of fascinating projects for prestigious brands from all over the world\n\nPLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers\n\nInvestment in your growth - meetups, webinars, training platform and technology blog - you choose\n\nFantastic atmosphere created by all Sii Power People\n\nIf you want to work on systems with high operational significance - apply now!","description_format":"text","description_chars":2694,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"Polish","level":"Advanced (C1)","optional":false}]},"benefits":["Cafeteria"],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Outsourcing & Dedicated Teams","Engineering Services","IT Staffing & Staff Augmentation"],"lifecycle":[{"event":"open","at":"2026-09-05T15:40:00Z"}],"liveness":{"score":15,"band":"cold","label":"Long shot","p_open":0.6,"p_active":0.716,"p_room":0.35,"age_days":40,"expected_fill_days":20,"reasons":["seen:40","velocity","win:tail"],"computed_at":"2026-10-01T05:45:00Z"},"pay":{"stated_usd_annual":96240,"is_top_pay":false},"html_url":"https://alion.io/job/sii-fx-senior-java-developer-fmx-2","json_url":"https://alion.io/job/sii-fx-senior-java-developer-fmx-2.json","meta":{"generated_at":"2026-10-02T03:03:36Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":4218,"day_limit":5000,"remaining_today":782,"minute_limit":60,"resets_at":"2026-10-03T00:00:00Z"}}}