{"id":2606471,"url":"https://alion.io/job/flanks-backend-software-engineer-fintech-barcelona","title":"Backend Software Engineer (Fintech / Barcelona)","company":{"id":53719,"name":"Flanks","domain":"flanks.io","url":"https://alion.io/company/flanks","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Teamtailor","truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Barcelona, Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":35000,"max":50000,"currency":"EUR","period":"year","gross":true,"usd_annual":55606},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"ElasticSearch","optional":false},{"name":"ETL/ELT","optional":false},{"name":"JavaScript","optional":false},{"name":"Python","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-06-04T10:08:25Z","employer_posted_date":"2026-06-04","last_verified_at":"2026-10-17T20:54:48Z","board_verified":true,"closed_at":null,"days_open":135,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":135},"description":"A little bit about Flanks\nFlanks is shaking up the wealth management industry by making it simpler and way more efficient for financial institutions. Our SaaS platform is designed to help banks, family offices, and wealth managers get a full picture of their clients' financial assets-all in one place.\nFounded in 2019 and based in Barcelona, we've brought together a team of passionate wealth management and tech pros, all with a shared goal: to change how wealth management is done. Backed by €23 million in investment, we're growing fast, and we're not stopping anytime soon!\nWhat we stand for:\nPeople First - our team comes first. We want every Flanker to feel at home, engaged, and part of something bigger.\n\nKeep Growing - as the company grows, so should you. We're all about personal and professional development here.\n\nThink Twice, Act Once - we believe in thoughtful decisions, considering the impact on both our team and our clients before taking action.\n\nIf you're looking for a place where you can grow and make an impact at a fast-paced, exciting fintech startup, this might just be the place for you!\nAbout the role\nAs a Mid-Level Backend Engineer on our Tech Team, you will design, build, and optimize the data pipelines and backend services that keep clean, reliable data flowing across the entire organization. You will own the full lifecycle of data ingestion and transformation work - from understanding a business requirement through to production deployment - and directly shape the backend infrastructure that powers our data-driven decision-making at Flanks.\nWhat you'll do\nHere's what you can expect to work on:\nDesign, develop, and maintain scalable ETL/ELT pipelines to ingest, transform, and load data from multiple disparate sources into our core systems.\n\nWrite clean, efficient Python code with a strong focus on performance - applying optimal data structures and algorithms to handle high-volume datasets reliably.\n\nCollaborate on database schema design (SQL and NoSQL) and own query performance optimization to ensure fast, accurate data access.\n\nImplement unit tests, integration tests, and data quality checks to guarantee pipeline integrity and catch issues before they reach production.\n\nDeploy and iterate on pipelines using CI/CD practices and containerization tools such as Docker, participating actively in code reviews to uphold team standards.\n\nWhat we'd love to see\nStrong Python and/or JavaScript engineering skills, with a focus on performance, memory efficiency, and writing maintainable, production-grade code.\n\nSolid experience building and operating data pipelines - ETL/ELT patterns, pipeline orchestration, and handling large-scale data ingestion - or experience building backend services for a product, ideally with exposure to Elasticsearch.\n\nFamiliarity with both SQL and NoSQL databases, including schema design and query optimization.\n\nComfort working autonomously - able to take a high-level requirement, define scope, and drive it to production without heavy hand-holding.\n\nAbility to navigate unfamiliar codebases quickly and contribute meaningfully from an early stage.\n\nExperience with CI/CD workflows and containerization (Docker or similar).\n\nWillingness to understand the financial data we work with and the formulas you will be responsible for implementing. It is important to be curious and open to learning how financial markets work, as this context is essential to correctly ingest, process, and expose financial data.\n\nLanguage Proficiency: Professional proficiency in both English and Spanish to collaborate effectively in our bilingual environment .\n\nIf this sounds like you, don't worry if you don't check every single box-we'll support your growth along the way.\nWhat we offer\nA full-time, permanent contract.\n\nA salary range of €35,000 - €50,000 gross per year, based on experience.\n\nA cool office between Sants Estació and Plaça Espanya with stunning views of Barcelona.\n\nFlexible working hours and hybrid work options.\n\nPaid day off on your birthday.\n\nWeekly fresh fruit, coffee, and tea on tap.\n\nFriday happy hours after our all-hands meetings (totally optional, of course!).\n\nTeam-building events to bond and have fun.\n\nHealth insurance and flexible compensation with Alan.\n\nA digital canteen, thanks to Kombo, subsidised at 50%.\n\nA yearly training budget to keep growing.\n\nThe hiring process\nSend us your CV, cover letter, etc.\n\nYou'll have a chat with our People Business Partner, Nicolás Guilarte.\n\nA meeting with the Tech Team.\n\nA technical test.\n\nFinal interview to review the technical test and iron out any remaining questions.\n\nWe send you an offer!\n\nWe aim to keep things moving fast-ideally wrapping things up in one to four weeks.\nIf this sounds like a good fit for you, we'd love to hear from you. Don't hesitate to send us your CV and/or cover letter.\nAt Flanks, we believe in fostering diversity and inclusion across everything we do. We're proud to be an equal opportunity employer, and we welcome all applications regardless of race, religion, gender, age, or disability status.\nAdditionally, we have an Equality Plan in place to ensure fairness and inclusivity in all our policies and practices.","description_format":"text","description_chars":5191,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"Spanish","level":"All levels","optional":false},{"language":"English","level":"All levels","optional":false}]},"benefits":["Flexible schedule","Health insurance","Hybrid work","Professional development"],"hiring_locations":[{"name":"Spain","iso":"ES","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Financial Services","Wealth Management & Financial Advisors","Financial Software & Embedded Finance","Investing Apps & Robo-Advisors"],"lifecycle":[{"event":"open","at":"2026-10-15T09:51:17Z"}],"visa":[],"liveness":{"score":10,"band":"cold","label":"Long shot","p_open":1,"p_active":0.35,"p_room":0.28,"age_days":134,"expected_fill_days":42,"reasons":["conf:0","win:tail","crowd:"],"computed_at":"2026-10-17T05:46:00Z"},"pay":{"stated_usd_annual":55606,"is_top_pay":false},"html_url":"https://alion.io/job/flanks-backend-software-engineer-fintech-barcelona","json_url":"https://alion.io/job/flanks-backend-software-engineer-fintech-barcelona.json","meta":{"generated_at":"2026-10-18T07:12:30Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":10787,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-19T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":53719},"rest":"https://alion.io/mcp/rest/get_company?id=53719"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fflanks-backend-software-engineer-fintech-barcelona"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fflanks-backend-software-engineer-fintech-barcelona"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fflanks-backend-software-engineer-fintech-barcelona"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/flanks-backend-software-engineer-fintech-barcelona\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fflanks-backend-software-engineer-fintech-barcelona"}]}