{"id":1140889,"url":"https://alion.io/job/abc-fitness-principal-engineer-software-architecture-and-modernization-3","title":"Principal Engineer – Software Architecture and Modernization","company":{"id":19166,"name":"ABC Fitness","domain":"abcfitness.com","url":"https://alion.io/company/abcfitness","size_band":"501-1000","is_staffing_agency":false,"is_intermediary":false,"ats_vendor":"Workday","truth_index":{"grade":"A","score":100,"open_postings":4,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":23,"computed_at":"2026-09-23T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"hiring_geo_confidence":"structured","locations":["Hyderabad, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":26000,"max_usd":57000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":8},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Go","optional":false},{"name":"Java","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false},{"name":"Apache Kafka","optional":true},{"name":"Oracle","optional":true}],"status":"live","first_seen_at":"2026-09-23T11:19:00Z","employer_posted_date":"2026-09-23","last_verified_at":"2026-09-23T11:19:00Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Join ABC Fitness and become part of a culture that’s as ambitious as it is authentic. Let’s transform the future of fitness-together!\nOur Values\nBest Life\nWe believe great work begins with great people. That’s why our culture is built on respect, trust, and belonging. We create an inclusive environment where every team member can bring their authentic self to work-because diverse perspectives drive innovation and meaningful impact.\nGrowth Mindset\nWe are doers, thinkers, and dreamers. At ABC Fitness, your growth is our investment. Through continuous learning, mentorship, and professional development opportunities, we empower you to reach new heights-personally and professionally.\nOne Team\nFrom day one, you’ll be part of a team that collaborates, celebrates, and cares. We move fast, support one another, and have fun along the way. Because when you thrive, we all thrive.\n\nWhat You’ll Do\nLead software architecture and modernization\nShape the evolution of legacy applications into well-structured, domain-oriented software. Define target architecture, module and service boundaries, migration seams, compatibility strategies, and incremental paths that teams can implement safely.\nStay deeply hands-on in code\nContribute directly to critical implementations, prototypes, refactoring, code reviews, and production fixes. Work comfortably in backend code and frameworks such as Java/Springboot, Golang, Node/TypeScript, or similar backend ecosystems, and help teams improve application structure, runtime behavior, and maintainability.\nDesign strong domain models and APIs\nCreate clear domain abstractions, ownership boundaries, service contracts, and APIs. Improve how business rules are represented in code and keep consumers insulated from legacy storage and implementation details.\nModernize application foundations\nGuide framework and runtime upgrades, dependency modernization, concurrency and lifecycle improvements, and the decomposition of tightly coupled code. Use practical refactoring strategies that keep large systems releasable throughout the work.\nEngineer for correctness, performance, and reliability\nDiagnose difficult behavior through code, runtime evidence, database interactions, and dependency flows. Fix root causes in implementation and design, including concurrency defects, inefficient data access, resource contention, failure propagation, and recovery behavior.\nImprove data access and integration design\nMove business logic out of database-centric implementations and into testable application code. Design effective persistence, transaction, caching, messaging, and event-consumer patterns while preserving historical, reporting, and audit needs.\nRaise the bar for code quality and testing\nEstablish strong practices for unit, integration, contract, and functional testing. Improve code review, static analysis, dependency management, feature controls, and validation so teams can change complex software with confidence.\nCreate reusable engineering patterns\nTurn successful designs into clear patterns, reference implementations, libraries, and architecture decisions that help teams solve recurring software problems consistently.\nTurn technical strategy into cross-team execution\nTranslate architectural risk into clear code-level priorities, decisions, ownership, and sequenced implementation plans. Partner with engineering, product, security, and data teams to move complex software initiatives from design through working code.\nWhat This Is Not\nThis is not a people-management or architecture-only role. The engineer is expected to contribute directly to implementation and production outcomes.\nThis is not limited to greenfield design or modernization for its own sake. Decisions must balance long-term software quality with migration safety, business value, and the realities of changing production applications.\nWhat You Bring\nDeep backend and distributed-systems engineering\nYou have substantial experience designing, building, operating, and evolving production backend systems, services, APIs, and distributed applications.\nCredible hands-on implementation depth\nYou can move from architecture into code, configuration, instrumentation, and diagnosis. Exact experience with Java/Springboot or Golang or Node/Typescript is relevant, but the key here is moving ideas into shippable software solutions and not on the technology.\nService transformation and architecture judgment\nYou can define service boundaries, domain ownership, migration strategies, integration patterns, and practical architecture decisions for complex existing environments.\nProduction reliability and performance expertise\nYou can trace difficult behavior through application code, runtime state, database interactions, and dependency flows, then implement fixes that improve correctness, concurrency, performance, and recovery behavior.\nSoftware design and refactoring depth\nYou can improve large codebases through domain modeling, modular design, dependency management, incremental refactoring, and carefully chosen abstractions. You know how to create better seams without forcing risky rewrites.\nData and integration depth\nYou understand relational databases, SQL behavior, messaging, event consumers, data movement, caching, and the tradeoffs involved in separating applications from legacy data dependencies.\nStrong testing and code-quality discipline\nYou treat automated testing, code review, static analysis, dependency health, secure coding, and production validation as essential parts of software design-not downstream concerns.\nPrincipal-level technical leadership\nYou create clarity across teams, challenge weak assumptions constructively, communicate risk in business terms, and help groups converge on decisions they can execute.\nAn opportunity-focused approach to AI-assisted engineering\nYou actively look for ways AI can expand engineering leverage across code comprehension, design exploration, implementation, refactoring, test generation, debugging, documentation, and planning. You help turn promising uses into repeatable practices that make strong engineers more effective.\nBonus Points\nExperience modernizing large complex software systems, including runtime and framework upgrades.\nExperience decomposing monoliths, extracting services, or establishing modular boundaries within large existing applications.\nExperience with Oracle or other enterprise relational databases, Kafka or similar messaging systems, and complex data migration or reporting dependencies.\nExperience with profiling, runtime instrumentation, concurrency analysis, database-performance diagnosis, or tuning.\nExperience applying AI coding agents for codebase analysis, implementation, testing, and software modernization.\nWhat Success Looks Like\nModernization advances without destabilizing the business\nCritical migrations have clear boundaries, sequencing, ownership, and safety controls. Teams retire legacy constraints while maintaining compatibility and operational continuity.\nCritical software becomes easier to change\nCodebases have clearer boundaries, stronger tests, healthier dependencies, and fewer hidden couplings. Teams can add capabilities and modernize incrementally without destabilizing unrelated behavior.\nArchitecture decisions become executable\nTeams understand the target state, the next practical step, and the tradeoffs behind key decisions. Cross-team dependencies and risks are surfaced early and actively managed.\nEngineering quality improves across the lifecycle\nTest coverage, code review, static analysis, dependency health, and production validation become stronger and more consistent across the software in scope.\nAI expands engineering leverage\nAI becomes an effective part of how teams understand code, explore designs, implement changes, generate tests, diagnose problems, and document systems.\nWhy This Matters\nABC Fitness depends on critical software and data flows that must evolve without compromising the businesses and members they support. Strong architecture is valuable only when it produces clearer code, better behavior, and software that teams can continue to change.\nThis role connects long-term technical direction with hands-on software engineering. Done well, it will help teams reduce codebase complexity, modernize with confidence, resolve production problems at their source, and build a stronger foundation for future product development.\n\nWHAT’S IN IT FOR YOU:\nPurpose led company with a Values focused culture - Best Life, One Team, Growth Mindset\n\nTime Off - competitive PTO plans with 15 Earned accrued leave, 12 days Sick leave, and 12 days Casual leave per year\n\n11 Holidays plus 4 Days of Disconnect - once a quarter, we take a collective breather and enjoy a day off together around the globe. #oneteam\n\nGroup Mediclaim insurance coverage of INR 500,000 for employee + spouse, 2 kids, and parents or parent-in-laws, and including EAP counseling\n\nLife Insurance and Personal Accident Insurance\n\nBest Life Perk - we are committed to meeting you wherever you are in your fitness journey with a quarterly reimbursement\n\nPremium Calm App - enjoy tranquility with a Calm App subscription for you and up to 4 dependents over the age of 16\n\nSupport for working women with financial aid towards crèche facility, ensuring a safe and nurturing environment for their little ones while they focus on their careers\n\nAt ABC Fitness, we don’t just build technology-we build communities and transform lives. Your work matters here, your growth is supported, and your voice is heard. We welcome diverse talent and encourage you to apply, even if you don’t meet every requirement.\nABC’S COMMITMENT TO DIVERSITY, EQUALITY, BELONGING AND INCLUSION: ABC is an equal opportunity employer committed to diversity, equity, and inclusion. We strive to create a workplace where every employee, client, and partner feels valued, inspired, and empowered to reach their full potential. For us, inclusion isn’t just the right thing to do-it’s a business imperative. Learn more at abcfitness.com.\nAbout ABC Fitness\nABC Fitness is the #1 software provider for fitness businesses of any size, all around the world. Supporting 30K clubs, 650K coaches, 40M members, and processing more than $12B in payments every year, ABC Fitness provides scalable, data-driven solutions to simplify club management and engage members and clients.\nFrom personal trainers, boutique studios, and gyms, to international franchise health clubs, ABC Fitness will move your business forward through technology and industry insights. Innovation is at the center of everything we do, across ABC Glofox, ABC Ignite, ABC Trainerize, and ABC Evo. Let's make your fitness vision a seamless reality, together. 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