{"id":826516,"url":"https://alion.io/job/mmdsmart-senior-full-stack-developer-goreact","title":"Senior Full Stack Developer (Go/React)","company":{"id":679390,"name":"MMDSmart","domain":"mmdsmart.com","url":"https://alion.io/company/mmdsmart","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":[],"countries":[],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":60000,"max_usd":100000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":352},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"GCP","optional":false},{"name":"Go","optional":false},{"name":"React.js","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-06-24T00:00:00Z","employer_posted_date":"2026-06-24","last_verified_at":"2026-11-07T09:14:37Z","board_verified":true,"closed_at":null,"days_open":136,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":136},"description":"We are looking for a Senior Full Stack Engineer who is comfortable working on high-load, distributed systems and making architectural decisions, not just implementing tasks.\nAt MMDSmart, you will work on a CPaaS/CCaaS platform handling messaging and voice communication at scale. This is not a typical CRUD product: you’ll deal with real-time flows, external integrations, billing complexity, and systems where design mistakes surface quickly in production.\nYou will be expected to take ownership from design to delivery and challenge assumptions when needed.\nSince 2007, MMDSmart has been a leading supplier in cloud-based business communications, delivering game-changing IT products to businesses in over 100 countries. Our success is fueled by the inspiration and innovative ideas of our team members, encouraging their growth and impacting our Messaging and Voice solutions. These empower our clients to communicate more effectively with their customers. Don’t miss this chance to excel in a rapidly expanding tech company, where your potential and ambitions are not just recognized, but celebrated.\nRequirements\n\nWhat will you do at MMDSmart?\nDesign and implement new platform capabilities across backend and frontend (not just “features” but system-level improvements);\nContribute to architecture decisions in a microservices environment (Go-based services, event-driven patterns, APIs);\nBuild and evolve React-based interfaces used by enterprise customers and internal teams;\nWork on integrations with external vendors (messaging providers, voice, billing systems);\nInvestigate production issues in a high-scale environment and drive them to resolution-not just patch them;\nParticipate in technical discussions, trade-off analysis, and system design reviews;\nOccasionally lead initiatives or own a domain end-to-end.\nYou are a perfect match if you have:\n4+ years of real production experience as a Full Stack Engineer;\nStrong backend expertise with Go (3+ years), not just syntax, but concurrency, performance, and system design;\nSolid frontend experience with React + TypeScript (2+ years);\nExperience building or maintaining distributed systems / microservices;\nGood understanding of data modeling (SQL + NoSQL) and when to use each;\nAbility to debug complex issues across services (not limited to your own code);\nComfortable working in an environment where requirements evolve and not everything is predefined.\nWill be a plus:\nExperience with real-time systems, messaging, or telecom domains;\nFamiliarity with event streaming (Kafka or similar);\nExperience with cloud platforms (GCP preferred);\nExposure to billing systems or high-throughput APIs.\nWhat you get:\nWork on systems that actually operate at scale and have real business impact;\nA team where senior engineers are expected to influence architecture, not just execute;\nRemote work.\nBenefits\nWhy do talents choose and stay at MMDSmart?\nEmbrace the opportunity to work in a company that cares about:\nYour Wellness: Access to mental health programs, comprehensive medical insurance, and a sports card*.\nYour Happiness: Enjoy the company of cool teammates, a friendly atmosphere, a strong mentorship, and a variety of bonuses & corporate gifts.\nYour Development: Benefit from free educational events & courses, and English classes with native speakers.\nYour Career: Focus on your professional development in a supportive environment.\nWork-Life Balance: Choose your working format - remote, office-based, or hybrid and engage in team-building activities.\nThink this role's got your name on it? Go ahead and apply, we'd love to see what you've got!\nEqual-Opportunity Employment\nWe are an equal opportunity employer committed to creating a diverse and inclusive work environment. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.\n*Medical Insurance and Sport Card perks are available for employees located in Bulgaria.","description_format":"text","description_chars":4061,"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":"English","level":"All levels","optional":false}]},"benefits":["Health insurance","Professional development"],"hiring_locations":[{"name":"Bulgaria","iso":"BG","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Contact Center Software"],"lifecycle":[{"event":"open","at":"2026-09-12T14:44:17Z"}],"visa":[],"liveness":{"score":28,"band":"fade","label":"Fading","p_open":1,"p_active":0.772,"p_room":0.36,"age_days":136,"expected_fill_days":79,"reasons":["conf:0","win:tail","crowd:"],"computed_at":"2026-11-07T05:47:08Z"},"pay":null,"html_url":"https://alion.io/job/mmdsmart-senior-full-stack-developer-goreact","json_url":"https://alion.io/job/mmdsmart-senior-full-stack-developer-goreact.json","meta":{"generated_at":"2026-11-07T12:01:19Z","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":12924,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-08T00:00:00Z"}},"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":679390},"rest":"https://alion.io/mcp/rest/get_company?id=679390"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmmdsmart-senior-full-stack-developer-goreact"},{"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%2Fmmdsmart-senior-full-stack-developer-goreact"},{"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%2Fmmdsmart-senior-full-stack-developer-goreact"},{"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/mmdsmart-senior-full-stack-developer-goreact\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmmdsmart-senior-full-stack-developer-goreact"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":826516}},{"tool":"search_jobs","arguments":{"company":"mmdsmart.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":826516},"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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