{"id":4077231,"url":"https://alion.io/job/smartly-senior-full-stack-engineer-reach","title":"Senior Full Stack Engineer (Reach)","company":{"id":56692,"name":"Smartly","domain":"smartly.io","url":"https://alion.io/company/smartly-io","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":89,"open_postings":31,"ghost_share":0,"stale_share":0.452,"repost_share":0,"time_to_fill_p50_days":55,"computed_at":"2026-11-11T05:49:22Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Helsinki, Finland"],"countries":["FI"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Node JS","optional":false},{"name":"React.js","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-11-11T14:45:14Z","employer_posted_date":"2026-11-11","last_verified_at":"2026-11-11T15:51:05Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Team Reach · Helsinki · Hybrid, three office days per week\nJoin Reach at Smartly to build an analytical product that helps customers understand brand marketing performance and make better investment decisions.\nThe work spans interactive interfaces, backend services, data processing, and statistical models. Challenges include deterministic deduplication and frequency distribution estimation: problems where assumptions, edge cases, and validation matter.\nAs a hands-on senior individual contributor, you’ll shape technical decisions, bring people together, and drive initiatives from an initial question to a reliable production solution.\nWhat you’ll do\nOwn outcomes. Work with Product and Design to clarify customer needs, choose an approach, and carry initiatives through delivery and follow-up.\nBuild across the stack. Develop data exploration interfaces, backend services and APIs, and the data models and computations connecting them.\nMake complex logic reliable. Investigate assumptions, reason through edge cases, and establish how to test and validate algorithms and statistical business logic.\nDrive coordinated delivery. Turn ambiguous goals into manageable steps, agree priorities, coordinate dependencies, surface risks early, and keep colleagues informed.\nBuild shared understanding. Listen to different perspectives, explain trade-offs clearly, and help engineering and business stakeholders reach decisions.\nStrengthen engineering practice. Contribute through architecture discussions, thoughtful reviews, documentation, mentoring, and improvements to how we work.\nHow we build\nOur application uses TypeScript, React, and Node.js. We welcome experience with other technologies and value deep understanding of the concepts behind the tools.\nAI-assisted development is part of how we work. We use coding assistants and agents for exploration, implementation, testing, and review, choosing automation to suit the problem. We judge their value by quality and effort saved. Engineers remain responsible for understanding, validating, and maintaining what they ship.\nWhat you’ll bring\nSenior engineering experience. You’ve designed, shipped, and operated substantial production software and can explain the decisions behind it.\nFull stack capability with depth. You’re comfortable across frontend, backend, data, and models, with particular strengths and willingness to go deeper where needed.\nStrong fundamentals. You understand how APIs, data modeling, algorithms, application state, and testing affect correctness, performance, and maintainability.\nAnalytical reasoning. You break unfamiliar problems apart, make assumptions explicit, identify counterexamples, and establish whether a solution is sound.\nCollaborative leadership. You ask useful questions, build agreement, give and receive constructive feedback, and help colleagues make progress.\nPractical AI judgment. You provide useful context, critically assess generated output, and verify changes through tests and investigation, considering security, maintainability, and complexity.\nExperience with analytical products, statistics, or algorithmic systems is valuable. Curiosity and willingness to learn the domain are essential.\nWhy join Reach?\nCombine product engineering with quantitative challenges, influence the product and its architecture, and grow through hands-on technical leadership and collaboration.\nSmartly offers healthcare and mental health support, paid holidays and family leave, equity opportunities, and career development opportunities.\nLearn more aboutEngineering at Smartly.\nOur recruitment process\nRecruiter conversation about your experience and the role.\nTeam lead discussion about expectations and ways of working.\nTechnical interviews covering coding, system design, and architecture.\nFinal conversation with engineering leadership.\nIf you enjoy making complex problems understandable and seeing work through to a useful outcome, we’d like to hear from you.\nAbout Smartly\nSmartly is the AI-powered advertising technology company transforming ad experiences for brands and their consumers. Our comprehensive advertising platform seamlessly integrates the capabilities of media, creative, and intelligence to power more than 800 billion impressions and generate more than 300 billion creatives annually, delivering tangible business outcomes for brands and advertisers.\nSmartly is the only company in the industry recognized as a Leader in The Forrester Wave: Creative Advertising Technologies with PwC validating the results it delivers for brands. We manage creative and media for 700+ brands worldwide and $6B in ad spend across the largest media platforms, including Facebook, Google, Instagram, Pinterest, Snap, and TikTok. Our end-to-end technology, unmatched access to media platforms and exceptional customer service help Fortune 500 brands to reach and engage consumers and learn what performs best.Smartly is a multinational and diverse team of 750+ Smartlies from 60+ nationalities, working in 13 countries. Together, we want to create and maintain an inclusive environment where everyone feels respected and heard. Our Diversity, Equity & Inclusion approach is at the heart of it.\nVisit Smartly to learn more.\nThe processing of your information is described in our Candidate Privacy Notice.","description_format":"text","description_chars":5301,"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":[]},"benefits":["Equity","Parental leave"],"hiring_locations":[{"name":"Finland","iso":"FI","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Advertising","Marketing & Sales AI"],"lifecycle":[{"event":"open","at":"2026-11-11T15:51:05Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":55,"reasons":["conf:4","win:early"],"computed_at":"2026-11-11T20:39:43Z"},"pay":null,"html_url":"https://alion.io/job/smartly-senior-full-stack-engineer-reach","json_url":"https://alion.io/job/smartly-senior-full-stack-engineer-reach.json","meta":{"generated_at":"2026-11-11T20:39:43Z","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":40311,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-12T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":56692},"rest":"https://alion.io/mcp/rest/get_company?id=56692"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsmartly-senior-full-stack-engineer-reach"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Fsmartly-senior-full-stack-engineer-reach"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fsmartly-senior-full-stack-engineer-reach"},{"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/smartly-senior-full-stack-engineer-reach\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsmartly-senior-full-stack-engineer-reach"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4077231}},{"tool":"search_jobs","arguments":{"company":"smartly.io","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4077231},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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